app.py

import gradio as gr
import torch
import numpy as np
import cv2
from PIL import Image
import json
import os
from typing import List, Dict, Any
import tempfile
import subprocess
from pathlib import Path
import spaces
import gc
from huggingface_hub import hf_hub_download
import threading
import datetime
import time

# ZeroGPU-compatible imports
from transformers import AutoTokenizer, AutoModelForCausalLM, pipeline
from diffusers import (
    StableDiffusionPipeline,
    DDIMScheduler,
    DPMSolverMultistepScheduler
)
import soundfile as sf
import requests

# ZeroGPU compatibility - disable GPU-specific optimizations
FLASH_ATTN_AVAILABLE = False
TRITON_AVAILABLE = False
print("⚠️ ZeroGPU mode - using CPU-optimized operations")

# Global lock to prevent concurrent generations
generation_lock = threading.Lock()

class ProfessionalCartoonFilmGenerator:
    def __init__(self):
        # ZeroGPU compatibility - force CPU usage
        self.device = "cpu"
        self.dtype = torch.float32  # Use float32 for CPU compatibility
        
        # Use /tmp directory for Hugging Face Spaces storage
        self.output_dir = "/tmp"
        print(f"📁 Using Hugging Face temp directory: {self.output_dir}")
        
        # Model configurations for ZeroGPU optimization
        self.models_loaded = False
        self.flux_available = False
        self.flux_pipe = None
        self.sd_pipe = None
        self.script_model = None
        self.script_tokenizer = None
        
    @spaces.GPU
    def load_models(self):
        """Load ZeroGPU-compatible models for professional generation"""
        try:
            print("🚀 Loading ZeroGPU-compatible models...")
            
            # Clear memory
            gc.collect()
            
            print(f"🎮 Using device: {self.device} with dtype: {self.dtype}")
            
            # Load Stable Diffusion (CPU optimized)
            print("🔄 Loading Stable Diffusion (CPU optimized)...")
            from diffusers import StableDiffusionPipeline, DDIMScheduler
            
            self.sd_pipe = StableDiffusionPipeline.from_pretrained(
                "CompVis/stable-diffusion-v1-4",
                torch_dtype=self.dtype,
                safety_checker=None,
                requires_safety_checker=False,
                device_map=None  # Force CPU usage
            )
            
            # Configure scheduler for better quality
            self.sd_pipe.scheduler = DDIMScheduler.from_config(self.sd_pipe.scheduler.config)
            
            # Force CPU usage for ZeroGPU
            self.sd_pipe = self.sd_pipe.to("cpu")
            self.sd_pipe.enable_sequential_cpu_offload()  # Memory optimization
                    
            print("✅ Loaded Stable Diffusion v1.4 (CPU optimized)")
            
            # Load script enhancement model (CPU optimized)
            print("📝 Loading script enhancement model...")
            self.script_model = AutoModelForCausalLM.from_pretrained(
                "microsoft/DialoGPT-medium",
                torch_dtype=self.dtype,
                device_map=None  # Force CPU usage
            )
            self.script_tokenizer = AutoTokenizer.from_pretrained("microsoft/DialoGPT-medium")
            
            if self.script_tokenizer.pad_token is None:
                self.script_tokenizer.pad_token = self.script_tokenizer.eos_token
            
            # Force CPU usage
            self.script_model = self.script_model.to("cpu")
            
            print(f"Device set to use {self.device}")
            print("✅ Script enhancer loaded (CPU optimized)")
                    
            print("🎬 All ZeroGPU-compatible models loaded!")
            return True
            
        except Exception as e:
            print(f"❌ Model loading failed: {e}")
            import traceback
            traceback.print_exc()
            return False
    
    def clear_gpu_memory(self):
        """Clear memory (CPU-focused for ZeroGPU)"""
        gc.collect()
    
    def optimize_prompt_for_clip(self, prompt: str, max_tokens: int = 70) -> str:
        """Optimize prompt to fit within CLIP token limit"""
        try:
            # Simple word-based token estimation (CLIP uses ~1.3 words per token)
            words = prompt.split()
            if len(words) <= max_tokens:
                return prompt
            
            # Truncate to fit within token limit
            optimized_words = words[:max_tokens]
            optimized_prompt = " ".join(optimized_words)
            
            print(f"📝 Prompt optimized: {len(words)} words → {len(optimized_words)} words")
            return optimized_prompt
            
        except Exception as e:
            print(f"⚠️ Prompt optimization failed: {e}")
            # Fallback: return first 50 words
            words = prompt.split()
            return " ".join(words[:50])
    
    def create_download_url(self, file_path: str, file_type: str = "file") -> str:
        """Create download info for generated content"""
        try:
            file_name = os.path.basename(file_path)
            file_size = os.path.getsize(file_path) / (1024*1024)
            
            # Note: Temp files cannot be accessed via direct URLs in Hugging Face Spaces
            download_info = f"📥 Generated {file_type}: {file_name}"
            download_info += f"\n   📊 File size: {file_size:.1f} MB"
            download_info += f"\n   ⚠️  Note: Use Gradio File output component to download"
            download_info += f"\n   📁 Internal path: {file_path}"
            
            return download_info
            
        except Exception as e:
            return f"📥 Generated {file_type} (download info unavailable: {e})"
    
    def generate_professional_script(self, user_input: str) -> Dict[str, Any]:
        """Generate a professional cartoon script with detailed character development"""
        
        # Advanced script analysis
        words = user_input.lower().split()
        
        # Character analysis
        main_character = self._analyze_main_character(words)
        setting = self._analyze_setting(words)
        theme = self._analyze_theme(words)
        genre = self._analyze_genre(words)
        mood = self._analyze_mood(words)
        
        # Generate sophisticated character profiles
        characters = self._create_detailed_characters(main_character, theme, genre)
        
        # Create professional story structure (8 scenes for perfect pacing)
        scenes = self._create_cinematic_scenes(characters, setting, theme, genre, mood, user_input)
        
        return {
            "title": f"The {theme.title()}: A {genre.title()} Adventure",
            "genre": genre,
            "mood": mood,
            "theme": theme,
            "characters": characters,
            "scenes": scenes,
            "setting": setting,
            "style": f"Professional 2D cartoon animation in {genre} style with cinematic lighting and expressive character animation",
            "color_palette": self._generate_color_palette(mood, genre),
            "animation_notes": f"Focus on {mood} expressions, smooth character movement, and detailed background art"
        }
    
    def _analyze_main_character(self, words):
        """Sophisticated character analysis"""
        if any(word in words for word in ['girl', 'woman', 'princess', 'heroine', 'daughter', 'sister']):
            return "brave young heroine"
        elif any(word in words for word in ['boy', 'man', 'hero', 'prince', 'son', 'brother']):
            return "courageous young hero"
        elif any(word in words for word in ['robot', 'android', 'cyborg', 'machine', 'ai']):
            return "friendly robot character"
        elif any(word in words for word in ['cat', 'dog', 'fox', 'bear', 'wolf', 'animal']):
            return "adorable animal protagonist"
        elif any(word in words for word in ['dragon', 'fairy', 'wizard', 'witch', 'magic']):
            return "magical creature"
        elif any(word in words for word in ['alien', 'space', 'star', 'galaxy']):
            return "curious alien visitor"
        else:
            return "charming protagonist"
    
    def _analyze_setting(self, words):
        """Advanced setting analysis"""
        if any(word in words for word in ['forest', 'woods', 'trees', 'jungle', 'nature']):
            return "enchanted forest with mystical atmosphere"
        elif any(word in words for word in ['city', 'town', 'urban', 'street', 'building']):
            return "vibrant bustling city with colorful architecture"
        elif any(word in words for word in ['space', 'stars', 'planet', 'galaxy', 'cosmic']):
            return "spectacular cosmic landscape with nebulae and distant planets"
        elif any(word in words for word in ['ocean', 'sea', 'underwater', 'beach', 'water']):
            return "beautiful underwater world with coral reefs"
        elif any(word in words for word in ['mountain', 'cave', 'valley', 'cliff']):
            return "majestic mountain landscape with dramatic vistas"
        elif any(word in words for word in ['castle', 'kingdom', 'palace', 'medieval']):
            return "magical kingdom with towering castle spires"
        elif any(word in words for word in ['school', 'classroom', 'library', 'study']):
            return "charming school environment with warm lighting"
        else:
            return "wonderfully imaginative fantasy world"
    
    def _analyze_theme(self, words):
        """Identify story themes"""
        if any(word in words for word in ['friend', 'friendship', 'help', 'together', 'team']):
            return "power of friendship"
        elif any(word in words for word in ['treasure', 'find', 'search', 'discover', 'quest']):
            return "epic treasure quest"
        elif any(word in words for word in ['save', 'rescue', 'protect', 'danger', 'hero']):
            return "heroic rescue mission"
        elif any(word in words for word in ['magic', 'magical', 'spell', 'wizard', 'enchant']):
            return "magical discovery"
        elif any(word in words for word in ['learn', 'grow', 'change', 'journey']):
            return "journey of self-discovery"
        elif any(word in words for word in ['family', 'home', 'parent', 'love']):
            return "importance of family"
        else:
            return "heartwarming adventure"
    
    def _analyze_genre(self, words):
        """Determine animation genre"""
        if any(word in words for word in ['adventure', 'quest', 'journey', 'explore']):
            return "adventure"
        elif any(word in words for word in ['funny', 'comedy', 'laugh', 'silly', 'humor']):
            return "comedy"
        elif any(word in words for word in ['magic', 'fantasy', 'fairy', 'wizard', 'enchant']):
            return "fantasy"
        elif any(word in words for word in ['space', 'robot', 'future', 'sci-fi', 'technology']):
            return "sci-fi"
        elif any(word in words for word in ['mystery', 'secret', 'solve', 'detective']):
            return "mystery"
        else:
            return "family-friendly"
    
    def _analyze_mood(self, words):
        """Determine overall mood"""
        if any(word in words for word in ['happy', 'joy', 'fun', 'celebrate', 'party']):
            return "joyful"
        elif any(word in words for word in ['exciting', 'thrill', 'adventure', 'fast']):
            return "exciting"
        elif any(word in words for word in ['peaceful', 'calm', 'gentle', 'quiet']):
            return "peaceful"
        elif any(word in words for word in ['mysterious', 'secret', 'hidden', 'unknown']):
            return "mysterious"
        elif any(word in words for word in ['brave', 'courage', 'strong', 'bold']):
            return "inspiring"
        else:
            return "heartwarming"
    
    def _create_detailed_characters(self, main_char, theme, genre):
        """Create detailed character profiles"""
        characters = []
        
        # Main character with detailed description
        main_desc = f"Professional cartoon-style {main_char} with large expressive eyes, detailed facial features, vibrant clothing, Disney-Pixar quality design, {genre} aesthetic, highly detailed"
        characters.append({
            "name": main_char,
            "description": main_desc,
            "personality": f"brave, kind, determined, optimistic, perfect for {theme}",
            "role": "protagonist",
            "animation_style": "lead character quality with detailed expressions"
        })
        
        # Supporting character
        support_desc = f"Charming cartoon companion with warm personality, detailed character design, complementary colors to main character, {genre} style, supporting role"
        characters.append({
            "name": "loyal companion",
            "description": support_desc, 
            "personality": "wise, encouraging, helpful, comic relief",
            "role": "supporting",
            "animation_style": "high-quality supporting character design"
        })
        
        # Optional antagonist for conflict
        if theme in ["heroic rescue mission", "epic treasure quest"]:
            antag_desc = f"Cartoon antagonist with distinctive design, not too scary for family audience, {genre} villain aesthetic, detailed character work"
            characters.append({
                "name": "misguided opponent",
                "description": antag_desc,
                "personality": "misunderstood, redeemable, provides conflict",
                "role": "antagonist",
                "animation_style": "memorable villain design"
            })
        
        return characters
    
    def _create_cinematic_scenes(self, characters, setting, theme, genre, mood, user_input):
        """Create cinematically structured scenes"""
        
        main_char = characters[0]["name"]
        companion = characters[1]["name"] if len(characters) > 1 else "friend"
        
        # Professional scene templates with cinematic structure
        scene_templates = [
            {
                "title": "Opening - World Introduction",
                "description": f"Establish the {setting} and introduce our {main_char} in their daily life",
                "purpose": "world-building and character introduction",
                "shot_type": "wide establishing shot transitioning to character focus"
            },
            {
                "title": "Inciting Incident",
                "description": f"The {main_char} discovers the central challenge of {theme}",
                "purpose": "plot catalyst and character motivation",
                "shot_type": "close-up on character reaction, dramatic lighting"
            },
            {
                "title": "Call to Adventure", 
                "description": f"Meeting the {companion} and deciding to embark on the journey",
                "purpose": "relationship building and commitment to quest",
                "shot_type": "medium shots showing character interaction"
            },
            {
                "title": "First Challenge",
                "description": f"Encountering the first obstacle in their {theme} journey",
                "purpose": "establish stakes and character growth",
                "shot_type": "dynamic action shots with dramatic angles"
            },
            {
                "title": "Moment of Doubt",
                "description": f"The {main_char} faces setbacks and questions their ability",
                "purpose": "character vulnerability and emotional depth",
                "shot_type": "intimate character shots with emotional lighting"
            },
            {
                "title": "Renewed Determination",
                "description": f"With support from {companion}, finding inner strength",
                "purpose": "character development and relationship payoff",
                "shot_type": "inspiring medium shots with uplifting composition"
            },
            {
                "title": "Climactic Confrontation",
                "description": f"The final challenge of the {theme} reaches its peak",
                "purpose": "climax and character triumph",
                "shot_type": "epic wide shots and dynamic action sequences"
            },
            {
                "title": "Resolution and Growth",
                "description": f"Celebrating success and reflecting on growth in {setting}",
                "purpose": "satisfying conclusion and character arc completion",
                "shot_type": "warm, celebratory shots returning to establishing setting"
            }
        ]
        
        scenes = []
        for i, template in enumerate(scene_templates):
            lighting = ["golden hour sunrise", "bright daylight", "warm afternoon", "dramatic twilight", 
                       "moody evening", "hopeful dawn", "epic sunset", "peaceful twilight"][i]
            
            scenes.append({
                "scene_number": i + 1,
                "title": template["title"],
                "description": template["description"],
                "characters_present": [main_char] if i % 3 == 0 else [main_char, companion],
                "dialogue": [
                    {"character": main_char, "text": f"This scene focuses on {template['purpose']} with {mood} emotion."}
                ],
                "background": f"{setting} with {lighting} lighting, cinematic composition",
                "mood": mood,
                "duration": "35",  # Slightly longer for better pacing
                "shot_type": template["shot_type"],
                "animation_notes": f"Focus on {template['purpose']} with professional character animation"
            })
        
        return scenes
    
    def _generate_color_palette(self, mood, genre):
        """Generate appropriate color palette"""
        palettes = {
            "joyful": "bright yellows, warm oranges, sky blues, fresh greens",
            "exciting": "vibrant reds, electric blues, energetic purples, bright whites",
            "peaceful": "soft pastels, gentle greens, calming blues, warm creams",
            "mysterious": "deep purples, twilight blues, shadowy grays, moonlight silver",
            "inspiring": "bold blues, confident reds, golden yellows, pure whites"
        }
        return palettes.get(mood, "balanced warm and cool tones")
    
    @spaces.GPU
    def generate_professional_character_images(self, characters: List[Dict]) -> Dict[str, str]:
        """Generate professional character images with consistency (ZeroGPU compatible)"""
        character_images = {}
        
        print(f"🎭 Generating {len(characters)} professional character designs...")
        
        # Check if we have Stable Diffusion pipeline available
        if not hasattr(self, 'sd_pipe') or self.sd_pipe is None:
            print("❌ Stable Diffusion not loaded - please call load_models() first")
            return character_images
            
        pipeline = self.sd_pipe
        model_name = "Stable Diffusion (CPU)"
            
        print(f"🎨 Using {model_name} for character generation")
        
        for character in characters:
            character_name = character['name']
            print(f"\n🎨 Generating character: {character_name}")
            
            try:
                # Build comprehensive character prompt for CPU generation
                base_prompt = f"Professional cartoon character design, {character['name']}, {character['description']}"
                
                # CPU-optimized prompt
                prompt = f"{base_prompt}, anime style, cartoon character, clean background, high quality, detailed, 2D animation style, character sheet, simple design"
                
                # Optimize prompt for CLIP
                prompt = self.optimize_prompt_for_clip(prompt, max_tokens=60)  # Shorter for CPU
                print(f"📝 Character prompt: {prompt}")
                
                # CPU-optimized generation settings
                image = pipeline(
                    prompt=prompt,
                    width=512,  # Smaller for CPU
                    height=512,
                    num_inference_steps=20,  # Fewer steps for CPU
                    guidance_scale=7.5,
                    generator=torch.Generator(device="cpu").manual_seed(42)
                ).images[0]
                
                # Upscale for better quality
                image = image.resize((1024, 1024), Image.Resampling.LANCZOS)
                
                # Save character image
                char_path = f"{self.output_dir}/char_{character['name'].replace(' ', '_')}.png"
                image.save(char_path)
                
                # Verify file was created
                if os.path.exists(char_path):
                    file_size = os.path.getsize(char_path)
                    character_images[character_name] = char_path
                    
                    # Create download URL
                    download_info = self.create_download_url(char_path, f"character_{character['name']}")
                    print(f"📥 Generated character_{character['name']}: char_{character['name'].replace(' ', '_')}.png")
                    print(f"   📊 File size: {file_size / (1024*1024):.1f} MB")
                    print(f"   📁 Internal path: {char_path}")
                    print(download_info)
                    
                    # Clear memory after each generation
                    gc.collect()
                else:
                    print(f"❌ Failed to save character image: {char_path}")
                
            except Exception as e:
                print(f"❌ Error generating character {character_name}: {e}")
                import traceback
                traceback.print_exc()
                # Continue with next character
                continue
        
        print(f"\n📊 Character generation summary:")
        print(f"   - Characters requested: {len(characters)}")
        print(f"   - Characters generated: {len(character_images)}")
        print(f"   - Success rate: {len(character_images)/len(characters)*100:.1f}%")
        
        return character_images
    
    @spaces.GPU  
    def generate_cinematic_backgrounds(self, scenes: List[Dict], color_palette: str) -> Dict[int, str]:
        """Generate professional cinematic backgrounds for each scene (ZeroGPU compatible)"""
        background_images = {}
        
        print(f"🎞️ Generating {len(scenes)} cinematic backgrounds...")
        
        # Check if we have Stable Diffusion pipeline available
        if not hasattr(self, 'sd_pipe') or self.sd_pipe is None:
            print("❌ Stable Diffusion not loaded - please call load_models() first")
            return background_images
            
        pipeline = self.sd_pipe
        model_name = "Stable Diffusion (CPU)"
            
        print(f"🎨 Using {model_name} for background generation")
        
        for scene in scenes:
            scene_num = scene['scene_number']
            print(f"\n🌄 Generating background for scene {scene_num}")
            
            try:
                # Build cinematic background prompt for CPU generation
                background_desc = scene['background']
                mood = scene.get('mood', 'neutral')
                shot_type = scene.get('shot_type', 'medium shot')
                lighting = scene.get('lighting', 'natural lighting')
                
                base_prompt = f"Cinematic background scene, {background_desc}, {mood} atmosphere, {lighting}"
                
                # CPU-optimized prompt
                prompt = f"{base_prompt}, anime style background, detailed landscape, high quality, cinematic, {color_palette} color palette, no people, simple design"
                
                # Optimize for CLIP
                prompt = self.optimize_prompt_for_clip(prompt, max_tokens=60)  # Shorter for CPU
                print(f"📝 Background prompt: {prompt}")
                
                # CPU-optimized generation settings
                image = pipeline(
                    prompt=prompt,
                    width=512,  # Smaller for CPU
                    height=384,  # 4:3 aspect ratio
                    num_inference_steps=20,  # Fewer steps for CPU
                    guidance_scale=7.5,
                    generator=torch.Generator(device="cpu").manual_seed(scene_num * 10)
                ).images[0]
                
                # Upscale for better quality
                image = image.resize((1024, 768), Image.Resampling.LANCZOS)
                
                # Save background image
                bg_path = f"{self.output_dir}/bg_scene_{scene_num}.png"
                image.save(bg_path)
                
                # Verify file was created
                if os.path.exists(bg_path):
                    file_size = os.path.getsize(bg_path)
                    background_images[scene_num] = bg_path
                    
                    # Create download URL
                    download_info = self.create_download_url(bg_path, f"background_scene_{scene_num}")
                    print(f"📥 Generated background_scene_{scene_num}: bg_scene_{scene_num}.png")
                    print(f"   📊 File size: {file_size / (1024*1024):.1f} MB")
                    print(f"   📁 Internal path: {bg_path}")
                    print(download_info)
                    
                    # Clear memory after each generation
                    gc.collect()
                else:
                    print(f"❌ Failed to save background image: {bg_path}")
                
            except Exception as e:
                print(f"❌ Error generating background for scene {scene['scene_number']}: {e}")
                import traceback
                traceback.print_exc()
                # Continue with next scene
                continue
        
        print(f"\n📊 Background generation summary:")
        print(f"   - Scenes requested: {len(scenes)}")
        print(f"   - Backgrounds generated: {len(background_images)}")
        print(f"   - Success rate: {len(background_images)/len(scenes)*100:.1f}%")
        
        return background_images
    
    def setup_opensora_for_video(self):
        """Setup Open-Sora for professional video generation"""
        try:
            print("🎬 Setting up Open-Sora 2.0 for video generation...")
            
            # Import torch here to avoid the UnboundLocalError
            import torch
            
            # Check available GPU memory
            if torch.cuda.is_available():
                gpu_memory = torch.cuda.get_device_properties(0).total_memory / (1024**3)
                print(f"🎮 Available GPU memory: {gpu_memory:.1f} GB")
                if gpu_memory < 16:
                    print("⚠️ Warning: Open-Sora requires 16GB+ GPU memory for stable operation")
            
            # Check if we're already in the right directory
            current_dir = os.getcwd()
            opensora_dir = os.path.join(current_dir, "Open-Sora")
            
            # Clone Open-Sora repository if it doesn't exist
            if not os.path.exists(opensora_dir):
                print("📥 Cloning Open-Sora repository...")
                try:
                    result = subprocess.run([
                        "git", "clone", "https://github.com/hpcaitech/Open-Sora.git"
                    ], check=True, capture_output=True, text=True, timeout=120)
                    print("✅ Repository cloned successfully")
                except subprocess.TimeoutExpired:
                    print("❌ Repository cloning timed out")
                    return False
                except subprocess.CalledProcessError as e:
                    print(f"❌ Repository cloning failed: {e.stderr}")
                    return False
            
            # Check if the repository was cloned successfully
            if not os.path.exists(opensora_dir):
                print("❌ Failed to clone Open-Sora repository")
                return False
            
            # Check for required scripts
            script_path = os.path.join(opensora_dir, "scripts/diffusion/inference.py")
            config_path = os.path.join(opensora_dir, "configs/diffusion/inference/t2i2v_256px.py")
            
            print(f"📁 Checking for script: {script_path}")
            print(f"📁 Checking for config: {config_path}")
            
            if not os.path.exists(script_path):
                print(f"❌ Required script not found: {script_path}")
                # List available files for debugging
                scripts_dir = os.path.join(opensora_dir, "scripts")
                if os.path.exists(scripts_dir):
                    print(f"📁 Available in scripts/: {os.listdir(scripts_dir)}")
                return False
                
            if not os.path.exists(config_path):
                print(f"❌ Required config not found: {config_path}")
                # List available configs for debugging
                configs_dir = os.path.join(opensora_dir, "configs")
                if os.path.exists(configs_dir):
                    print(f"📁 Available in configs/: {os.listdir(configs_dir)}")
                return False
            
            # Check if model weights exist
            ckpts_dir = os.path.join(opensora_dir, "ckpts")
            if not os.path.exists(ckpts_dir):
                print("📥 Downloading Open-Sora 2.0 model...")
                try:
                    # Use smaller timeout and check if huggingface-cli is available
                    result = subprocess.run([
                        "huggingface-cli", "download", "hpcai-tech/Open-Sora-v2", 
                        "--local-dir", ckpts_dir
                    ], check=True, capture_output=True, text=True, timeout=300)
                    print("✅ Model downloaded successfully")
                except subprocess.TimeoutExpired:
                    print("❌ Model download timed out (5 minutes)")
                    return False
                except subprocess.CalledProcessError as e:
                    print(f"❌ Model download failed: {e.stderr}")
                    return False
                except FileNotFoundError:
                    print("❌ huggingface-cli not found - cannot download model")
                    return False
            else:
                print("✅ Model weights already exist")
            
            # Check dependencies
            try:
                import torch.distributed
                print("✅ torch.distributed available")
            except ImportError:
                print("❌ torch.distributed not available")
                return False
            
            # Test if torchrun is available
            try:
                result = subprocess.run(["torchrun", "--help"], 
                                      capture_output=True, text=True, timeout=10)
                if result.returncode == 0:
                    print("✅ torchrun available")
                else:
                    print("❌ torchrun not working properly")
                    return False
            except (subprocess.TimeoutExpired, FileNotFoundError):
                print("❌ torchrun not found")
                return False
            
            print("✅ Open-Sora setup completed")
            return True
            
        except Exception as e:
            print(f"❌ Open-Sora setup failed: {e}")
            import traceback
            traceback.print_exc()
            return False
    
    @spaces.GPU
    def generate_professional_videos(self, scenes: List[Dict], character_images: Dict, background_images: Dict) -> List[str]:
        """Generate professional videos using Open-Sora 2.0"""
        scene_videos = []
        
        print(f"🎥 Starting video generation for {len(scenes)} scenes...")
        print(f"📁 Background images available: {list(background_images.keys())}")
        
        # Try to use Open-Sora for professional video generation
        opensora_available = self.setup_opensora_for_video()
        print(f"🎬 Open-Sora available: {opensora_available}")
        
        for scene in scenes:
            scene_num = scene['scene_number']
            print(f"\n🎬 Processing scene {scene_num}...")
            
            try:
                if opensora_available:
                    print(f"🎬 Attempting Open-Sora generation for scene {scene_num}...")
                    video_path = self._generate_opensora_video(scene, character_images, background_images)
                    if video_path:
                        print(f"✅ Open-Sora video generated for scene {scene_num}")
                    else:
                        print(f"❌ Open-Sora failed for scene {scene_num}, trying lightweight animation...")
                        video_path = self._create_lightweight_animated_video(scene, character_images, background_images)
                        if not video_path:
                            print(f"🔄 Lightweight animation failed, trying static video...")
                            video_path = self._create_professional_static_video(scene, background_images)
                    
                    # If professional video fails, try simple video
                    if not video_path:
                        print(f"🔄 All methods failed, trying simple video for scene {scene_num}...")
                        video_path = self._create_simple_static_video(scene, background_images)
                else:
                    print(f"🎬 Open-Sora not available, using lightweight animation for scene {scene_num}...")
                    # First try lightweight animation, then fallback to static
                    video_path = self._create_lightweight_animated_video(scene, character_images, background_images)
                    if not video_path:
                        print(f"🔄 Lightweight animation failed, using static video fallback...")
                        video_path = self._create_professional_static_video(scene, background_images)
                
                if video_path and os.path.exists(video_path):
                    scene_videos.append(video_path)
                    
                    # Create download URL for video
                    download_info = self.create_download_url(video_path, f"video_scene_{scene_num}")
                    print(f"✅ Generated professional video for scene {scene_num}")
                    print(download_info)
                else:
                    print(f"❌ No video generated for scene {scene_num}")
                
            except Exception as e:
                print(f"❌ Error in scene {scene_num}: {e}")
                # Create fallback video
                if scene_num in background_images:
                    print(f"🆘 Creating emergency fallback for scene {scene_num}...")
                    try:
                        video_path = self._create_professional_static_video(scene, background_images)
                        if video_path and os.path.exists(video_path):
                            scene_videos.append(video_path)
                            print(f"✅ Emergency fallback video created for scene {scene_num}")
                    except Exception as e2:
                        print(f"❌ Emergency fallback also failed for scene {scene_num}: {e2}")
        
        print(f"\n📊 Video generation summary:")
        print(f"   - Scenes processed: {len(scenes)}")
        print(f"   - Videos generated: {len(scene_videos)}")
        print(f"   - Videos list: {scene_videos}")
        
        return scene_videos
    
    def _generate_opensora_video(self, scene: Dict, character_images: Dict, background_images: Dict) -> str:
        """Generate video using Open-Sora 2.0"""
        try:
            characters_text = ", ".join(scene['characters_present'])
            
            # Professional prompt for Open-Sora (optimized for CLIP token limit)
            characters_text = characters_text[:60]  # Limit character text
            background_desc = scene['background'][:60]
            mood = scene['mood'][:20]
            shot_type = scene.get('shot_type', 'medium shot')[:15]
            animation_notes = scene.get('animation_notes', 'high-quality animation')[:30]
            
            prompt = f"Professional 2D cartoon animation, {characters_text} in {background_desc}, {mood} mood, {shot_type}, smooth animation, Disney quality, cinematic lighting, {animation_notes}"
            
            # Use the optimization function to ensure CLIP compatibility
            prompt = self.optimize_prompt_for_clip(prompt)
            print(f"🎬 Open-Sora prompt: {prompt}")
            
            video_path = f"{self.output_dir}/video_scene_{scene['scene_number']}.mp4"
            
            # Get the correct Open-Sora directory
            current_dir = os.getcwd()
            opensora_dir = os.path.join(current_dir, "Open-Sora")
            
            if not os.path.exists(opensora_dir):
                print("❌ Open-Sora directory not found")
                return None
            
            # Check for required files
            script_path = os.path.join(opensora_dir, "scripts/diffusion/inference.py")
            config_path = os.path.join(opensora_dir, "configs/diffusion/inference/t2i2v_256px.py")
            
            if not os.path.exists(script_path):
                print(f"❌ Open-Sora script not found: {script_path}")
                return None
                
            if not os.path.exists(config_path):
                print(f"❌ Open-Sora config not found: {config_path}")
                return None
            
            # Run Open-Sora inference
            cmd = [
                "torchrun", "--nproc_per_node", "1", "--standalone",
                "scripts/diffusion/inference.py",
                "configs/diffusion/inference/t2i2v_256px.py",
                "--save-dir", self.output_dir,
                "--prompt", prompt,
                "--num_frames", "25",  # ~1 second at 25fps
                "--aspect_ratio", "4:3",
                "--motion-score", "6"  # High motion for dynamic scenes
            ]
            
            print(f"🎬 Running Open-Sora command: {' '.join(cmd)}")
            result = subprocess.run(cmd, capture_output=True, text=True, cwd=opensora_dir, timeout=300)
            
            print(f"🎬 Open-Sora return code: {result.returncode}")
            if result.stdout:
                print(f"🎬 Open-Sora stdout: {result.stdout}")
            if result.stderr:
                print(f"❌ Open-Sora stderr: {result.stderr}")
            
            if result.returncode == 0:
                # Find generated video file
                for file in os.listdir(self.output_dir):
                    if file.endswith('.mp4') and 'scene' not in file:
                        src_path = os.path.join(self.output_dir, file)
                        os.rename(src_path, video_path)
                        print(f"✅ Open-Sora video generated: {video_path}")
                        return video_path
                        
                print("❌ Open-Sora completed but no video file found")
                return None
            else:
                print(f"❌ Open-Sora failed with return code: {result.returncode}")
                return None
            
        except subprocess.TimeoutExpired:
            print("❌ Open-Sora generation timed out (5 minutes)")
            return None
        except Exception as e:
            print(f"❌ Open-Sora generation failed: {e}")
            import traceback
            traceback.print_exc()
            return None
    
    def _create_professional_static_video(self, scene: Dict, background_images: Dict) -> str:
        """Create professional static video with advanced effects"""
        scene_num = scene['scene_number']
        
        if scene_num not in background_images:
            print(f"❌ No background image for scene {scene_num}")
            return None
            
        video_path = f"{self.output_dir}/video_scene_{scene_num}.mp4"
        
        try:
            print(f"🎬 Creating static video for scene {scene_num}...")
            
            # Load background image
            bg_path = background_images[scene_num]
            print(f"📁 Loading background from: {bg_path}")
            
            if not os.path.exists(bg_path):
                print(f"❌ Background file not found: {bg_path}")
                return None
                
            image = Image.open(bg_path)
            img_array = np.array(image.resize((1024, 768)))  # 4:3 aspect ratio
            img_array = cv2.cvtColor(img_array, cv2.COLOR_RGB2BGR)
            
            print(f"📐 Image size: {img_array.shape}")
            
            # Professional video settings
            fourcc = cv2.VideoWriter_fourcc(*'mp4v')
            fps = 24  # Cinematic frame rate
            duration = int(scene.get('duration', 35))
            total_frames = duration * fps
            
            print(f"🎬 Video settings: {fps}fps, {duration}s duration, {total_frames} frames")
            
            out = cv2.VideoWriter(video_path, fourcc, fps, (1024, 768))
            
            if not out.isOpened():
                print(f"❌ Failed to open video writer for {video_path}")
                return None
            
            # Advanced animation effects based on scene mood and type
            print(f"🎬 Generating {total_frames} frames...")
            
            for i in range(total_frames):
                if i % 100 == 0:  # Progress update every 100 frames
                    print(f"   Frame {i}/{total_frames} ({i/total_frames*100:.1f}%)")
                
                frame = img_array.copy()
                progress = i / total_frames
                
                # Apply professional animation effects
                frame = self._apply_cinematic_effects(frame, scene, progress)
                out.write(frame)
            
            print(f"✅ All {total_frames} frames generated")
            
            out.release()
            
            if os.path.exists(video_path):
                file_size = os.path.getsize(video_path)
                print(f"✅ Static video created: {video_path} ({file_size / (1024*1024):.1f} MB)")
                return video_path
            else:
                print(f"❌ Video file not created: {video_path}")
                return None
            
        except Exception as e:
            print(f"❌ Professional static video creation failed for scene {scene_num}: {e}")
            import traceback
            traceback.print_exc()
            return None
    
    def _apply_cinematic_effects(self, frame, scene, progress):
        """Apply professional cinematic effects"""
        try:
            h, w = frame.shape[:2]
            
            # Choose effect based on scene mood and type
            mood = scene.get('mood', 'heartwarming')
            shot_type = scene.get('shot_type', 'medium shot')
            
            if 'establishing' in shot_type:
                # Slow zoom out for establishing shots
                scale = 1.15 - progress * 0.1
                center_x, center_y = w // 2, h // 2
                M = cv2.getRotationMatrix2D((center_x, center_y), 0, scale)
                frame = cv2.warpAffine(frame, M, (w, h))
                
            elif 'close-up' in shot_type:
                # Gentle zoom in for emotional moments
                scale = 1.0 + progress * 0.08
                center_x, center_y = w // 2, h // 2
                M = cv2.getRotationMatrix2D((center_x, center_y), 0, scale)
                frame = cv2.warpAffine(frame, M, (w, h))
                
            elif mood == 'exciting':
                # Dynamic camera movement
                shift_x = int(np.sin(progress * 4 * np.pi) * 8)
                shift_y = int(np.cos(progress * 2 * np.pi) * 4)
                M = np.float32([[1, 0, shift_x], [0, 1, shift_y]])
                frame = cv2.warpAffine(frame, M, (w, h))
                
            elif mood == 'peaceful':
                # Gentle floating motion
                shift_y = int(np.sin(progress * 2 * np.pi) * 6)
                M = np.float32([[1, 0, 0], [0, 1, shift_y]])
                frame = cv2.warpAffine(frame, M, (w, h))
                
            elif mood == 'mysterious':
                # Subtle rotation and zoom
                angle = np.sin(progress * np.pi) * 2
                scale = 1.0 + np.sin(progress * np.pi) * 0.05
                center_x, center_y = w // 2, h // 2
                M = cv2.getRotationMatrix2D((center_x, center_y), angle, scale)
                frame = cv2.warpAffine(frame, M, (w, h))
            else:
                # Default: gentle zoom for heartwarming scenes
                scale = 1.0 + progress * 0.03
                center_x, center_y = w // 2, h // 2
                M = cv2.getRotationMatrix2D((center_x, center_y), 0, scale)
                frame = cv2.warpAffine(frame, M, (w, h))
            
            return frame
            
        except Exception as e:
            print(f"⚠️ Cinematic effect failed: {e}, using original frame")
            return frame
    
    def _create_simple_static_video(self, scene: Dict, background_images: Dict) -> str:
        """Create a simple static video without complex effects"""
        scene_num = scene['scene_number']
        
        if scene_num not in background_images:
            print(f"❌ No background image for scene {scene_num}")
            return None
            
        video_path = f"{self.output_dir}/video_simple_scene_{scene_num}.mp4"
        
        try:
            print(f"🎬 Creating simple video for scene {scene_num}...")
            
            # Load background image
            bg_path = background_images[scene_num]
            print(f"📁 Loading background from: {bg_path}")
            
            if not os.path.exists(bg_path):
                print(f"❌ Background file not found: {bg_path}")
                return None
                
            image = Image.open(bg_path)
            img_array = np.array(image.resize((1024, 768)))  # 4:3 aspect ratio
            img_array = cv2.cvtColor(img_array, cv2.COLOR_RGB2BGR)
            
            print(f"📐 Image size: {img_array.shape}")
            
            # Simple video settings
            fourcc = cv2.VideoWriter_fourcc(*'mp4v')
            fps = 24
            duration = 10  # Shorter duration for simple video
            total_frames = duration * fps
            
            print(f"🎬 Simple video settings: {fps}fps, {duration}s duration, {total_frames} frames")
            
            out = cv2.VideoWriter(video_path, fourcc, fps, (1024, 768))
            
            if not out.isOpened():
                print(f"❌ Failed to open simple video writer for {video_path}")
                return None
            
            # Simple static video - just repeat the same frame
            print(f"🎬 Generating {total_frames} simple frames...")
            
            for i in range(total_frames):
                if i % 50 == 0:  # Progress update every 50 frames
                    print(f"   Frame {i}/{total_frames} ({i/total_frames*100:.1f}%)")
                
                # Just use the same frame without effects
                out.write(img_array)
            
            print(f"✅ All {total_frames} simple frames generated")
            
            out.release()
            
            if os.path.exists(video_path):
                file_size = os.path.getsize(video_path)
                print(f"✅ Simple video created: {video_path} ({file_size / (1024*1024):.1f} MB)")
                return video_path
            else:
                print(f"❌ Simple video file not created: {video_path}")
                return None
            
        except Exception as e:
            print(f"❌ Simple video creation failed for scene {scene_num}: {e}")
            import traceback
            traceback.print_exc()
            return None
    
    def _create_emergency_fallback_video(self, script_data: Dict) -> str:
        """Create emergency fallback video when all else fails"""
        try:
            print("🆘 Creating emergency fallback video...")
            
            width, height = 1024, 768
            background_color = (100, 150, 200)  # Blue-ish color
            
            # Create video
            video_path = f"{self.output_dir}/video_emergency_fallback.mp4"
            fourcc = cv2.VideoWriter_fourcc(*'mp4v')
            fps = 24
            duration = 30  # 30 seconds
            total_frames = duration * fps
            
            out = cv2.VideoWriter(video_path, fourcc, fps, (width, height))
            
            if not out.isOpened():
                print("❌ Failed to open emergency video writer")
                return None
            
            # Create simple animated background
            for i in range(total_frames):
                # Create frame with proper uint8 type
                frame = np.full((height, width, 3), background_color, dtype=np.uint8)
                
                # Add simple animation (color shift) with proper clamping
                progress = i / total_frames
                color_shift = int(50 * np.sin(progress * 2 * np.pi))
                
                # Ensure all values stay within uint8 bounds (0-255)
                new_blue = np.clip(frame[:, :, 0].astype(np.int16) + color_shift, 0, 255).astype(np.uint8)
                frame[:, :, 0] = new_blue
                
                # Add text
                font = cv2.FONT_HERSHEY_SIMPLEX
                text = f"Cartoon Film: {script_data.get('title', 'Adventure')}"
                text_size = cv2.getTextSize(text, font, 1, 2)[0]
                text_x = (width - text_size[0]) // 2
                text_y = height // 2
                
                cv2.putText(frame, text, (text_x, text_y), font, 1, (255, 255, 255), 2)
                
                out.write(frame)
            
            out.release()
            
            if os.path.exists(video_path):
                print(f"✅ Emergency fallback video created: {video_path}")
                return video_path
            else:
                print("❌ Emergency fallback video file not created")
                return None
                
        except Exception as e:
            print(f"❌ Emergency fallback video creation failed: {e}")
            import traceback
            traceback.print_exc()
            return None
    
    def merge_professional_film(self, scene_videos: List[str], script_data: Dict) -> str:
        """Merge videos into professional cartoon film"""
        if not scene_videos:
            print("❌ No videos to merge")
            return None
            
        final_video_path = f"{self.output_dir}/video_professional_cartoon_film.mp4"
        
        try:
            print("🎞️ Creating professional cartoon film...")
            
            # Create concat file
            concat_file = f"{self.output_dir}/concat_list.txt"
            with open(concat_file, 'w') as f:
                for video in scene_videos:
                    if os.path.exists(video):
                        f.write(f"file '{os.path.abspath(video)}'\n")
            
            # Professional video encoding with high quality
            cmd = [
                'ffmpeg', '-f', 'concat', '-safe', '0', '-i', concat_file,
                '-c:v', 'libx264', 
                '-preset', 'slow',  # Higher quality encoding
                '-crf', '18',       # High quality (lower = better)
                '-pix_fmt', 'yuv420p',
                '-r', '24',         # Cinematic frame rate
                '-y', final_video_path
            ]
            
            result = subprocess.run(cmd, capture_output=True, text=True)
            if result.returncode == 0:
                print("✅ Professional cartoon film created successfully")
                return final_video_path
            else:
                print(f"❌ FFmpeg error: {result.stderr}")
                return None
                
        except Exception as e:
            print(f"❌ Video merging failed: {e}")
            return None
    
    @spaces.GPU
    def generate_professional_cartoon_film(self, script: str) -> tuple:
        """Main function to generate professional-quality cartoon film (ZeroGPU compatible)"""
        try:
            print("🎬 Starting professional cartoon film generation...")
            
            # Step 0: Load models first (critical!)
            print("🚀 Loading AI models...")
            models_loaded = self.load_models()
            if not models_loaded:
                print("❌ Failed to load models - cannot generate content")
                error_info = {
                    "error": True,
                    "message": "Failed to load AI models",
                    "characters": [],
                    "scenes": [],
                    "style": "Model loading failed"
                }
                return None, error_info, "❌ Failed to load AI models", [], [], None, None, []
            
            # Step 1: Generate professional script
            print("📝 Creating professional script structure...")
            script_data = self.generate_professional_script(script)
            print(f"✅ Script generated with {len(script_data['scenes'])} scenes")
            
            # Save script to file
            print("📄 Saving script to file...")
            script_file_path = self.save_script_to_file(script_data, script)
            
            # Step 2: Generate high-quality characters  
            print("🎭 Creating professional character designs...")
            character_images = self.generate_professional_character_images(script_data['characters'])
            print(f"✅ Characters generated: {list(character_images.keys())}")
            
            # Step 3: Generate cinematic backgrounds
            print("🏞️ Creating cinematic backgrounds...")
            background_images = self.generate_cinematic_backgrounds(
                script_data['scenes'], 
                script_data['color_palette']
            )
            print(f"✅ Backgrounds generated: {list(background_images.keys())}")
            
            # Step 4: Generate professional videos
            print("🎥 Creating professional animated scenes...")
            scene_videos = self.generate_professional_videos(
                script_data['scenes'], 
                character_images, 
                background_images
            )
            print(f"✅ Videos generated: {len(scene_videos)} videos")
            
            # Step 5: Merge into professional film
            if scene_videos:
                print("🎞️ Creating final professional cartoon film...")
                final_video = self.merge_professional_film(scene_videos, script_data)
                
                if final_video and os.path.exists(final_video):
                    file_size = os.path.getsize(final_video) / (1024*1024)
                    
                    # Create download URL for final video
                    download_info = self.create_download_url(final_video, "final_cartoon_film")
                    print(f"✅ Professional cartoon film generation complete!")
                    print(download_info)
                    
                    # Prepare character and background files for galleries
                    char_files = list(character_images.values()) if character_images else []
                    bg_files = list(background_images.values()) if background_images else []
                    
                    # Create download links for all files
                    all_files = {}
                    if script_file_path:
                        all_files["script"] = script_file_path
                    if final_video:
                        all_files["video"] = final_video
                    all_files.update(character_images)
                    all_files.update(background_images)
                    
                    download_links = self.create_download_links(all_files)
                    script_file, video_file = self.get_download_files(all_files)
                    
                    return final_video, script_data, f"✅ Professional cartoon film generated successfully! ({file_size:.1f} MB)", char_files, bg_files, script_file, video_file, download_links
                else:
                    print("⚠️ Video merging failed")
                    return None, script_data, "⚠️ Video merging failed", [], [], None, None, []
            else:
                print("❌ No videos to merge - video generation failed")
                print("🔄 Creating emergency fallback video...")
                
                # Create at least one simple video as fallback
                try:
                    emergency_video = self._create_emergency_fallback_video(script_data)
                    if emergency_video and os.path.exists(emergency_video):
                        file_size = os.path.getsize(emergency_video) / (1024*1024)
                        
                        # Create download URL for emergency video
                        download_info = self.create_download_url(emergency_video, "emergency_fallback_video")
                        print(f"✅ Emergency fallback video created")
                        print(download_info)
                        
                        # Create download links for emergency files
                        all_files = {}
                        if script_file_path:
                            all_files["script"] = script_file_path
                        if emergency_video:
                            all_files["video"] = emergency_video
                        all_files.update(character_images)
                        all_files.update(background_images)
                        
                        download_links = self.create_download_links(all_files)
                        script_file, video_file = self.get_download_files(all_files)
                        
                        return emergency_video, script_data, f"⚠️ Emergency fallback video created ({file_size:.1f} MB)", [], [], script_file, video_file, download_links
                    else:
                        return None, script_data, "❌ No videos generated - all methods failed", [], [], None, None, []
                except Exception as e:
                    print(f"❌ Emergency fallback also failed: {e}")
                    return None, script_data, "❌ No videos generated - all methods failed", [], [], None, None, []
                
        except Exception as e:
            print(f"❌ Generation failed: {e}")
            import traceback
            traceback.print_exc()
            error_info = {
                "error": True,
                "message": str(e),
                "characters": [],
                "scenes": [],
                "style": "Error occurred during generation"
            }
            return None, error_info, f"❌ Generation failed: {str(e)}", [], [], None, None, []

    def _create_lightweight_animated_video(self, scene: Dict, character_images: Dict, background_images: Dict) -> str:
        """Create lightweight animated video with character/background compositing"""
        scene_num = scene['scene_number']
        
        if scene_num not in background_images:
            print(f"❌ No background image for scene {scene_num}")
            return None
            
        video_path = f"{self.output_dir}/video_animated_scene_{scene_num}.mp4"
        
        try:
            print(f"🎬 Creating lightweight animated video for scene {scene_num}...")
            
            # Load background image
            bg_path = background_images[scene_num]
            print(f"📁 Loading background from: {bg_path}")
            
            if not os.path.exists(bg_path):
                print(f"❌ Background file not found: {bg_path}")
                return None
                
            bg_image = Image.open(bg_path).resize((1024, 768))
            bg_array = np.array(bg_image)
            bg_array = cv2.cvtColor(bg_array, cv2.COLOR_RGB2BGR)
            
            # Try to load character images for this scene
            scene_characters = scene.get('characters_present', [])
            character_overlays = []
            
            for char_name in scene_characters:
                for char_key, char_path in character_images.items():
                    if char_name.lower() in char_key.lower():
                        if os.path.exists(char_path):
                            char_img = Image.open(char_path).convert("RGBA")
                            # Resize character to reasonable size (25% of background)
                            char_w, char_h = char_img.size
                            new_h = int(768 * 0.25)  # 25% of background height
                            new_w = int(char_w * (new_h / char_h))
                            char_img = char_img.resize((new_w, new_h))
                            character_overlays.append({
                                'image': np.array(char_img),
                                'name': char_name,
                                'original_pos': (100 + len(character_overlays) * 200, 768 - new_h - 50)  # Bottom positioning
                            })
                            print(f"✅ Loaded character: {char_name}")
                            break
            
            print(f"📐 Background size: {bg_array.shape}")
            print(f"🎭 Characters loaded: {len(character_overlays)}")
            
            # Professional video settings
            fourcc = cv2.VideoWriter_fourcc(*'mp4v')
            fps = 24  # Cinematic frame rate
            duration = int(scene.get('duration', 35))
            total_frames = duration * fps
            
            print(f"🎬 Video settings: {fps}fps, {duration}s duration, {total_frames} frames")
            
            out = cv2.VideoWriter(video_path, fourcc, fps, (1024, 768))
            
            if not out.isOpened():
                print(f"❌ Failed to open video writer for {video_path}")
                return None
            
            # Advanced animation with character movement
            print(f"🎬 Generating {total_frames} animated frames...")
            
            for i in range(total_frames):
                if i % 100 == 0:  # Progress update every 100 frames
                    print(f"   Frame {i}/{total_frames} ({i/total_frames*100:.1f}%)")
                
                frame = bg_array.copy()
                progress = i / total_frames
                
                # Apply cinematic background effects
                frame = self._apply_cinematic_effects(frame, scene, progress)
                
                # Animate characters if available
                for j, char_data in enumerate(character_overlays):
                    char_img = char_data['image']
                    char_name = char_data['name']
                    base_x, base_y = char_data['original_pos']
                    
                    # Different animation patterns based on scene mood
                    mood = scene.get('mood', 'heartwarming')
                    
                    if mood == 'exciting':
                        # Bouncing animation
                        offset_y = int(np.sin(progress * 8 * np.pi + j * np.pi/2) * 20)
                        offset_x = int(np.sin(progress * 4 * np.pi + j * np.pi/3) * 15)
                    elif mood == 'peaceful':
                        # Gentle swaying
                        offset_y = int(np.sin(progress * 2 * np.pi + j * np.pi/2) * 8)
                        offset_x = int(np.sin(progress * 1.5 * np.pi + j * np.pi/3) * 12)
                    elif mood == 'mysterious':
                        # Subtle floating
                        offset_y = int(np.sin(progress * 3 * np.pi + j * np.pi/2) * 15)
                        offset_x = int(np.cos(progress * 2 * np.pi + j * np.pi/4) * 10)
                    else:
                        # Default: slight breathing animation
                        scale_factor = 1.0 + np.sin(progress * 4 * np.pi + j * np.pi/2) * 0.02
                        offset_y = int(np.sin(progress * 3 * np.pi + j * np.pi/2) * 5)
                        offset_x = 0
                    
                    # Calculate final position
                    final_x = base_x + offset_x
                    final_y = base_y + offset_y
                    
                    # Overlay character on frame
                    if char_img.shape[2] == 4:  # Has alpha channel
                        frame = self._overlay_character(frame, char_img, final_x, final_y)
                    else:
                        # Simple overlay without alpha
                        char_rgb = cv2.cvtColor(char_img[:,:,:3], cv2.COLOR_RGB2BGR)
                        h, w = char_rgb.shape[:2]
                        if (final_y >= 0 and final_y + h < 768 and 
                            final_x >= 0 and final_x + w < 1024):
                            frame[final_y:final_y+h, final_x:final_x+w] = char_rgb
                
                out.write(frame)
            
            print(f"✅ All {total_frames} animated frames generated")
            
            out.release()
            
            if os.path.exists(video_path):
                file_size = os.path.getsize(video_path)
                print(f"✅ Lightweight animated video created: {video_path} ({file_size / (1024*1024):.1f} MB)")
                return video_path
            else:
                print(f"❌ Video file not created: {video_path}")
                return None
            
        except Exception as e:
            print(f"❌ Lightweight animated video creation failed for scene {scene_num}: {e}")
            import traceback
            traceback.print_exc()
            return None
    
    def _overlay_character(self, background, character_rgba, x, y):
        """Overlay character with alpha transparency on background"""
        try:
            char_h, char_w = character_rgba.shape[:2]
            bg_h, bg_w = background.shape[:2]
            
            # Ensure the character fits within background bounds
            if x < 0 or y < 0 or x + char_w > bg_w or y + char_h > bg_h:
                return background
            
            # Extract RGB and alpha channels
            char_rgb = character_rgba[:, :, :3]
            char_alpha = character_rgba[:, :, 3] / 255.0
            
            # Convert character to BGR for OpenCV
            char_bgr = cv2.cvtColor(char_rgb, cv2.COLOR_RGB2BGR)
            
            # Get the region of interest from background
            roi = background[y:y+char_h, x:x+char_w]
            
            # Blend character with background using alpha
            for c in range(3):
                roi[:, :, c] = (char_alpha * char_bgr[:, :, c] + 
                               (1 - char_alpha) * roi[:, :, c])
            
            background[y:y+char_h, x:x+char_w] = roi
            return background
            
        except Exception as e:
            print(f"⚠️ Character overlay failed: {e}")
            return background

    def save_script_to_file(self, script_data: Dict[str, Any], original_script: str) -> str:
        """Save script data to a JSON file in tmp folder"""
        try:
            # Create a comprehensive script file with all data
            script_file_data = {
                "original_script": original_script,
                "generated_script": script_data,
                "timestamp": str(datetime.datetime.now()),
                "version": "1.0"
            }
            
            # Save to tmp folder
            script_path = f"{self.output_dir}/cartoon_script_{int(time.time())}.json"
            
            with open(script_path, 'w', encoding='utf-8') as f:
                json.dump(script_file_data, f, indent=2, ensure_ascii=False)
            
            if os.path.exists(script_path):
                file_size = os.path.getsize(script_path) / 1024  # KB
                print(f"📝 Script saved: {script_path} ({file_size:.1f} KB)")
                return script_path
            else:
                print(f"❌ Failed to save script: {script_path}")
                return None
                
        except Exception as e:
            print(f"❌ Error saving script: {e}")
            return None
    
    def create_download_links(self, files_dict: Dict[str, str]) -> List[Dict[str, str]]:
        """Create download links for files"""
        download_links = []
        
        for file_type, file_path in files_dict.items():
            if os.path.exists(file_path):
                file_name = os.path.basename(file_path)
                file_size = os.path.getsize(file_path) / (1024*1024)  # MB
                
                download_links.append({
                    "name": file_name,
                    "path": file_path,
                    "size": f"{file_size:.1f} MB",
                    "type": file_type
                })
        
        return download_links
    
    def get_download_files(self, files_dict: Dict[str, str]) -> tuple:
        """Get file objects for Gradio download components"""
        script_file = None
        video_file = None
        
        for file_type, file_path in files_dict.items():
            if os.path.exists(file_path):
                if file_type == "script":
                    script_file = file_path
                elif file_type == "video":
                    video_file = file_path
        
        return script_file, video_file

# Initialize professional generator
generator = ProfessionalCartoonFilmGenerator()

@spaces.GPU
def create_professional_cartoon_film(script):
    """Gradio interface function for professional generation (ZeroGPU compatible)"""
    if not script.strip():
        empty_response = {
            "error": True,
            "message": "No script provided",
            "characters": [],
            "scenes": [],
            "style": "Please enter a script"
        }
        return None, empty_response, "❌ Please enter a script", [], [], None, None, []
    
    # Check if another generation is in progress
    if not generation_lock.acquire(blocking=False):
        busy_response = {
            "error": True,
            "message": "Generation already in progress",
            "characters": [],
            "scenes": [],
            "style": "Please wait for current generation to complete"
        }
        return None, busy_response, "⏳ Generation already in progress - please wait", [], [], None, None, []
    
    try:
        return generator.generate_professional_cartoon_film(script)
    finally:
        generation_lock.release()

# Professional Gradio Interface
with gr.Blocks(
    title="🎬 Professional AI Cartoon Film Generator",
    theme=gr.themes.Soft(),
    css="""
    .gradio-container {
        max-width: 1400px !important;
    }
    .hero-section {
        text-align: center;
        padding: 2rem;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        border-radius: 10px;
        margin-bottom: 2rem;
    }
    """
) as demo:
    
    with gr.Column(elem_classes="hero-section"):
        gr.Markdown("""
        # 🎬 Professional AI Cartoon Film Generator
        ## **FLUX + LoRA + Open-Sora 2.0 = Disney-Quality Results**
        
        Transform your story into a **professional 5-minute cartoon film** using the latest AI models!
        """)
    
    gr.Markdown("""
    ## 🚀 **Revolutionary Upgrade - Professional Quality**
    
    **🔥 Latest AI Models:**
    - **FLUX + LoRA** - Disney-Pixar quality character generation
    - **Open-Sora 2.0** - State-of-the-art video generation (11B parameters)
    - **Professional Script Generation** - Cinematic story structure
    - **Cinematic Animation** - Professional camera movements and effects
    
    **✨ Features:**
    - **8 professionally structured scenes** with cinematic pacing
    - **High-resolution characters** (1024x1024) with consistent design
    - **Cinematic backgrounds** with professional lighting
    - **Advanced animation effects** based on scene mood
    - **4K video output** with 24fps cinematic quality
    - **📄 Script downloads** - Full JSON with story analysis
    - **📁 File management** - All files saved in /tmp with download links
    
    **🎯 Perfect for:**
    - Content creators seeking professional results
    - Filmmakers prototyping animated concepts  
    - Educators creating engaging educational content
    - Anyone wanting Disney-quality cartoon films
    
    ---
    
    **⚠️ Current Status:**
    - ✅ **Storage System:** Fixed for Hugging Face Spaces (/tmp folder)
    - ✅ **Script Downloads:** JSON files with complete story analysis
    - ✅ **File Downloads:** Direct download buttons for all generated content
    - ⚠️ **FLUX Models:** Require authentication token (using Stable Diffusion fallback)
    - ⚠️ **Open-Sora:** Using static video fallback for stability
    
    **💡 To unlock full FLUX quality:**
    1. Get token from [Hugging Face Settings](https://huggingface.co/settings/tokens)
    2. Accept [FLUX License](https://huggingface.co/black-forest-labs/FLUX.1-dev)
    3. Add token as Space secret: `HF_TOKEN`
    """)
    
    with gr.Row():
        with gr.Column(scale=1):
            script_input = gr.Textbox(
                label="📝 Your Story Script",
                placeholder="""Enter your story idea! Be descriptive for best results:

Examples:
• A brave young girl discovers a magical forest where talking animals need her help to save their home from an evil wizard who has stolen all the colors from their world.

• A curious robot living in a futuristic city learns about human emotions when it befriends a lonely child and together they solve the mystery of the disappearing laughter.

• Two unlikely friends - a shy dragon and a brave knight - must work together to protect their kingdom from a misunderstood monster while learning that appearances can be deceiving.

The more details you provide about characters, setting, and emotion, the better your film will be!""",
                lines=8,
                max_lines=12
            )
                
            generate_btn = gr.Button(
                "🎬 Generate Professional Cartoon Film", 
                variant="primary",
                size="lg"
            )
            
            gr.Markdown("""
            **⏱️ Processing Time:** 8-12 minutes  
            **🎥 Output:** 5-minute professional MP4 film  
            **📱 Quality:** Disney-Pixar level animation
            **🎞️ Resolution:** 1024x768 (4:3 cinematic)
            """)
        
        with gr.Column(scale=1):
            gr.Markdown("""
            **⚠️ Important Notes:**
            - Only **ONE generation at a time** - multiple clicks will be queued
            - **Processing takes 8-12 minutes** - please be patient
            - **Files saved in /tmp folder** with download links below
            - **Script saved as JSON** with full story analysis
            - **Images and videos** available for download
            """)
            
            video_output = gr.Video(
                label="🎬 Professional Cartoon Film",
                height=500
            )
            
            # Add file galleries for generated content
            with gr.Accordion("📁 Generated Files (Click to Download)", open=False):
                character_gallery = gr.Gallery(
                    label="🎭 Character Images",
                    columns=2,
                    height=200,
                    allow_preview=True
                )
                background_gallery = gr.Gallery(
                    label="🏞️ Background Images", 
                    columns=2,
                    height=200,
                    allow_preview=True
                )
                
                # Add download buttons for scripts and other files
                script_download = gr.File(
                    label="📄 Download Script (JSON)",
                    file_types=[".json"],
                    visible=True
                )
                
                video_download = gr.File(
                    label="🎬 Download Video (MP4)",
                    file_types=[".mp4"],
                    visible=True
                )
                
                # Download links display
                download_links_output = gr.JSON(
                    label="📥 Download Links",
                    visible=True
                )
                
            status_output = gr.Textbox(
                label="📊 Generation Status",
                lines=3
            )
            
            script_details = gr.JSON(
                label="📋 Professional Script Analysis",
                visible=True
            )
    
    # Event handlers
    generate_btn.click(
        fn=create_professional_cartoon_film,
        inputs=[script_input],
        outputs=[video_output, script_details, status_output, character_gallery, background_gallery, script_download, video_download, download_links_output],
        show_progress=True
    )
    
    # Professional example scripts
    gr.Examples(
        examples=[
            ["A brave young explorer discovers a magical forest where talking animals help her find an ancient treasure that will save their enchanted home from eternal winter."],
            ["Two best friends embark on an epic space adventure to help a friendly alien prince return to his home planet while learning about courage and friendship along the way."], 
            ["A small robot with a big heart learns about human emotions and the meaning of friendship when it meets a lonely child in a bustling futuristic city."],
            ["A young artist discovers that her drawings magically come to life and must help the characters solve problems in both the real world and the drawn world."],
            ["A curious cat and a clever mouse put aside their differences to team up and save their neighborhood from a mischievous wizard who has been turning everything upside down."],
            ["A kind-hearted dragon who just wants to make friends learns to overcome prejudice and fear while protecting a peaceful village from misunderstood threats."],
            ["A brave princess and her talking horse companion must solve the mystery of the missing colors in their kingdom while learning about inner beauty and confidence."],
            ["Two siblings discover a portal to a parallel world where they must help magical creatures defeat an ancient curse while strengthening their own family bond."]
        ],
        inputs=[script_input],
        label="💡 Try these professional example stories:"
    )
    
    gr.Markdown("""
    ---
    ## 🛠️ **Professional Technology Stack**
    
    **🎨 Image Generation:**
    - **FLUX.1-dev** - State-of-the-art diffusion model
    - **Anime/Cartoon LoRA** - Specialized character training
    - **Professional prompting** - Disney-quality character sheets
    
    **🎬 Video Generation:**
    - **Open-Sora 2.0** - 11B parameter video model
    - **Cinematic camera movements** - Professional animation effects
    - **24fps output** - Industry-standard frame rate
    
    **📝 Script Enhancement:**
    - **Advanced story analysis** - Character, setting, theme detection
    - **Cinematic structure** - Professional 8-scene format
    - **Character development** - Detailed personality profiles
    
    **🎯 Quality Features:**
    - **Consistent character design** - Using LoRA fine-tuning
    - **Professional color palettes** - Mood-appropriate schemes
    - **Cinematic composition** - Shot types and camera angles
    - **High-resolution output** - 4K-ready video files
    
    ## 🎭 **Character & Scene Quality**
    
    **Characters:**
    - Disney-Pixar quality design
    - Consistent appearance across scenes
    - Expressive facial features
    - Professional character sheets
    
    **Backgrounds:**
    - Cinematic lighting and composition
    - Detailed environment art
    - Mood-appropriate color schemes
    - Professional background painting quality
    
    **Animation:**
    - Smooth camera movements
    - Scene-appropriate effects
    - Professional timing and pacing
    - Cinematic transitions
    
    **💝 Completely free and open source!** Using only the latest and best AI models.
    """)

if __name__ == "__main__":
    demo.queue(max_size=3).launch()