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# Copyright (C) 2023 Deforum LLC
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.

# Contact the authors: https://deforum.github.io/

import os
import time
import pathlib
import re
import numexpr
from modules.shared import opts, state
from .render import render_animation
from .seed import next_seed
from .video_audio_utilities import vid2frames, render_preview
from .prompt import interpolate_prompts
from .generate import generate
from .animation_key_frames import DeformAnimKeys
from .parseq_adapter import ParseqAdapter
from .save_images import save_image
from .settings import save_settings_from_animation_run

def render_input_video(args, anim_args, video_args, parseq_args, loop_args, controlnet_args, root):
    # create a folder for the video input frames to live in
    video_in_frame_path = os.path.join(args.outdir, 'inputframes') 
    os.makedirs(video_in_frame_path, exist_ok=True)

    # save the video frames from input video
    print(f"Exporting Video Frames (1 every {anim_args.extract_nth_frame}) frames to {video_in_frame_path}...")
    vid2frames(video_path = anim_args.video_init_path, video_in_frame_path=video_in_frame_path, n=anim_args.extract_nth_frame, overwrite=anim_args.overwrite_extracted_frames, extract_from_frame=anim_args.extract_from_frame, extract_to_frame=anim_args.extract_to_frame)

    # determine max frames from length of input frames
    anim_args.max_frames = len([f for f in pathlib.Path(video_in_frame_path).glob('*.jpg')])
    args.use_init = True
    print(f"Loading {anim_args.max_frames} input frames from {video_in_frame_path} and saving video frames to {args.outdir}")

    if anim_args.use_mask_video:
        # create a folder for the mask video input frames to live in
        mask_in_frame_path = os.path.join(args.outdir, 'maskframes') 
        os.makedirs(mask_in_frame_path, exist_ok=True)

        # save the video frames from mask video
        print(f"Exporting Video Frames (1 every {anim_args.extract_nth_frame}) frames to {mask_in_frame_path}...")
        vid2frames(video_path=anim_args.video_mask_path,video_in_frame_path=mask_in_frame_path, n=anim_args.extract_nth_frame, overwrite=anim_args.overwrite_extracted_frames, extract_from_frame=anim_args.extract_from_frame, extract_to_frame=anim_args.extract_to_frame)
        max_mask_frames = len([f for f in pathlib.Path(mask_in_frame_path).glob('*.jpg')])

        # limit max frames if there are less frames in the video mask compared to input video
        if max_mask_frames < anim_args.max_frames :
            anim_args.max_mask_frames
            print ("Video mask contains less frames than init video, max frames limited to number of mask frames.")
        args.use_mask = True
        args.overlay_mask = True

    render_animation(args, anim_args, video_args, parseq_args, loop_args, controlnet_args, root)

# Modified a copy of the above to allow using masking video with out a init video.
def render_animation_with_video_mask(args, anim_args, video_args, parseq_args, loop_args, controlnet_args, root):
    # create a folder for the video input frames to live in
    mask_in_frame_path = os.path.join(args.outdir, 'maskframes') 
    os.makedirs(mask_in_frame_path, exist_ok=True)

    # save the video frames from mask video
    print(f"Exporting Video Frames (1 every {anim_args.extract_nth_frame}) frames to {mask_in_frame_path}...")
    vid2frames(video_path=anim_args.video_mask_path, video_in_frame_path=mask_in_frame_path, n=anim_args.extract_nth_frame, overwrite=anim_args.overwrite_extracted_frames, extract_from_frame=anim_args.extract_from_frame, extract_to_frame=anim_args.extract_to_frame)
    args.use_mask = True
    #args.overlay_mask = True

    # determine max frames from length of input frames
    anim_args.max_frames = len([f for f in pathlib.Path(mask_in_frame_path).glob('*.jpg')])
    #args.use_init = True
    print(f"Loading {anim_args.max_frames} input frames from {mask_in_frame_path} and saving video frames to {args.outdir}")

    render_animation(args, anim_args, video_args, parseq_args, loop_args, controlnet_args, root)

def get_parsed_value(value, frame_idx, max_f):
    pattern = r'`.*?`'
    regex = re.compile(pattern)
    parsed_value = value
    for match in regex.finditer(parsed_value):
        matched_string = match.group(0)
        parsed_string = matched_string.replace('t', f'{frame_idx}').replace("max_f" , f"{max_f}").replace('`','')
        value = numexpr.evaluate(parsed_string)
        parsed_value = parsed_value.replace(matched_string, str(value))
    return parsed_value

def render_interpolation(args, anim_args, video_args, parseq_args, loop_args, controlnet_args, root):

    # use parseq if manifest is provided
    parseq_adapter = ParseqAdapter(parseq_args, anim_args, video_args, controlnet_args, loop_args)

    # expand key frame strings to values
    keys = DeformAnimKeys(anim_args) if not parseq_adapter.use_parseq else parseq_adapter.anim_keys

    # create output folder for the batch
    os.makedirs(args.outdir, exist_ok=True)
    print(f"Saving interpolation animation frames to {args.outdir}")

    # save settings.txt file for the current run
    save_settings_from_animation_run(args, anim_args, parseq_args, loop_args, controlnet_args, video_args, root)
        
    # Compute interpolated prompts
    if parseq_adapter.manages_prompts():
        print("Parseq prompts are assumed to already be interpolated - not doing any additional prompt interpolation")
        prompt_series = keys.prompts
    else: 
        print("Generating interpolated prompts for all frames")
        prompt_series = interpolate_prompts(root.animation_prompts, anim_args.max_frames)
    
    state.job_count = anim_args.max_frames
    frame_idx = 0
    last_preview_frame = 0
    # INTERPOLATION MODE
    while frame_idx < anim_args.max_frames:
        # print data to cli
        prompt_to_print = get_parsed_value(prompt_series[frame_idx].strip(), frame_idx, anim_args.max_frames)
        
        if prompt_to_print.endswith("--neg"):
            prompt_to_print = prompt_to_print[:-5]
        print(f"\033[36mInterpolation frame: \033[0m{frame_idx}/{anim_args.max_frames}  ")
        print(f"\033[32mSeed: \033[0m{args.seed}")
        print(f"\033[35mPrompt: \033[0m{prompt_to_print}")
        
        state.job = f"frame {frame_idx + 1}/{anim_args.max_frames}"
        state.job_no = frame_idx + 1
        
        if state.interrupted:
            break
        if state.skipped:
            print("\n** PAUSED **")
            state.skipped = False
            while not state.skipped:
                time.sleep(0.1)
            print("** RESUMING **")
        
        # grab inputs for current frame generation
        args.prompt = prompt_to_print
        args.scale = keys.cfg_scale_schedule_series[frame_idx]
        args.pix2pix_img_cfg_scale = keys.pix2pix_img_cfg_scale_series[frame_idx]

        scheduled_sampler_name = keys.sampler_schedule_series[frame_idx].casefold() if anim_args.enable_sampler_scheduling and keys.sampler_schedule_series[frame_idx] is not None else None
        args.steps = int(keys.steps_schedule_series[frame_idx]) if anim_args.enable_steps_scheduling and keys.steps_schedule_series[frame_idx] is not None else args.steps
        scheduled_clipskip = int(keys.clipskip_schedule_series[frame_idx]) if anim_args.enable_clipskip_scheduling and keys.clipskip_schedule_series[frame_idx] is not None else None
        args.checkpoint = keys.checkpoint_schedule_series[frame_idx] if anim_args.enable_checkpoint_scheduling else None
        if anim_args.enable_subseed_scheduling:
            root.subseed = int(keys.subseed_schedule_series[frame_idx])
            root.subseed_strength = keys.subseed_strength_schedule_series[frame_idx]
        else:
            root.subseed, root.subseed_strength = keys.subseed_schedule_series[frame_idx], keys.subseed_strength_schedule_series[frame_idx]
        if parseq_adapter.manages_seed():
            anim_args.enable_subseed_scheduling = True
            root.subseed, root.subseed_strength = int(keys.subseed_schedule_series[frame_idx]), keys.subseed_strength_schedule_series[frame_idx]
        args.seed = int(keys.seed_schedule_series[frame_idx]) if (args.seed_behavior == 'schedule' or parseq_adapter.manages_seed()) else args.seed
        opts.data["CLIP_stop_at_last_layers"] = scheduled_clipskip if scheduled_clipskip is not None else opts.data["CLIP_stop_at_last_layers"]

        image = generate(args, keys, anim_args, loop_args, controlnet_args, root, parseq_adapter, frame_idx, sampler_name=scheduled_sampler_name)
        filename = f"{root.timestring}_{frame_idx:09}.png"

        save_image(image, 'PIL', filename, args, video_args, root)

        state.current_image = image
        
        if args.seed_behavior != 'schedule':
            args.seed = next_seed(args, root)

        last_preview_frame = render_preview(args, anim_args, video_args, root, frame_idx, last_preview_frame)

        frame_idx += 1

        

	# Copyright (C) 2023 Deforum LLC
	#
	# This program is free software: you can redistribute it and/or modify
	# it under the terms of the GNU Affero General Public License as published by
	# the Free Software Foundation, version 3 of the License.
	#
	# This program is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	# GNU General Public License for more details.
	#
	# You should have received a copy of the GNU Affero General Public License
	# along with this program. If not, see <https://www.gnu.org/licenses/>.

	# Contact the authors: https://deforum.github.io/

	import os
	import time
	import pathlib
	import re
	import numexpr
	from modules.shared import opts, state
	from .render import render_animation
	from .seed import next_seed
	from .video_audio_utilities import vid2frames, render_preview
	from .prompt import interpolate_prompts
	from .generate import generate
	from .animation_key_frames import DeformAnimKeys
	from .parseq_adapter import ParseqAdapter
	from .save_images import save_image
	from .settings import save_settings_from_animation_run

	def render_input_video(args, anim_args, video_args, parseq_args, loop_args, controlnet_args, root):
	# create a folder for the video input frames to live in
	video_in_frame_path = os.path.join(args.outdir, 'inputframes')
	os.makedirs(video_in_frame_path, exist_ok=True)

	# save the video frames from input video
	print(f"Exporting Video Frames (1 every {anim_args.extract_nth_frame}) frames to {video_in_frame_path}...")
	vid2frames(video_path = anim_args.video_init_path, video_in_frame_path=video_in_frame_path, n=anim_args.extract_nth_frame, overwrite=anim_args.overwrite_extracted_frames, extract_from_frame=anim_args.extract_from_frame, extract_to_frame=anim_args.extract_to_frame)

	# determine max frames from length of input frames
	anim_args.max_frames = len([f for f in pathlib.Path(video_in_frame_path).glob('*.jpg')])
	args.use_init = True
	print(f"Loading {anim_args.max_frames} input frames from {video_in_frame_path} and saving video frames to {args.outdir}")

	if anim_args.use_mask_video:
	# create a folder for the mask video input frames to live in
	mask_in_frame_path = os.path.join(args.outdir, 'maskframes')
	os.makedirs(mask_in_frame_path, exist_ok=True)

	# save the video frames from mask video
	print(f"Exporting Video Frames (1 every {anim_args.extract_nth_frame}) frames to {mask_in_frame_path}...")
	vid2frames(video_path=anim_args.video_mask_path,video_in_frame_path=mask_in_frame_path, n=anim_args.extract_nth_frame, overwrite=anim_args.overwrite_extracted_frames, extract_from_frame=anim_args.extract_from_frame, extract_to_frame=anim_args.extract_to_frame)
	max_mask_frames = len([f for f in pathlib.Path(mask_in_frame_path).glob('*.jpg')])

	# limit max frames if there are less frames in the video mask compared to input video
	if max_mask_frames < anim_args.max_frames :
	anim_args.max_mask_frames
	print ("Video mask contains less frames than init video, max frames limited to number of mask frames.")
	args.use_mask = True
	args.overlay_mask = True

	render_animation(args, anim_args, video_args, parseq_args, loop_args, controlnet_args, root)

	# Modified a copy of the above to allow using masking video with out a init video.
	def render_animation_with_video_mask(args, anim_args, video_args, parseq_args, loop_args, controlnet_args, root):
	# create a folder for the video input frames to live in
	mask_in_frame_path = os.path.join(args.outdir, 'maskframes')
	os.makedirs(mask_in_frame_path, exist_ok=True)

	# save the video frames from mask video
	print(f"Exporting Video Frames (1 every {anim_args.extract_nth_frame}) frames to {mask_in_frame_path}...")
	vid2frames(video_path=anim_args.video_mask_path, video_in_frame_path=mask_in_frame_path, n=anim_args.extract_nth_frame, overwrite=anim_args.overwrite_extracted_frames, extract_from_frame=anim_args.extract_from_frame, extract_to_frame=anim_args.extract_to_frame)
	args.use_mask = True
	#args.overlay_mask = True

	# determine max frames from length of input frames
	anim_args.max_frames = len([f for f in pathlib.Path(mask_in_frame_path).glob('*.jpg')])
	#args.use_init = True
	print(f"Loading {anim_args.max_frames} input frames from {mask_in_frame_path} and saving video frames to {args.outdir}")

	render_animation(args, anim_args, video_args, parseq_args, loop_args, controlnet_args, root)

	def get_parsed_value(value, frame_idx, max_f):
	pattern = r'`.*?`'
	regex = re.compile(pattern)
	parsed_value = value
	for match in regex.finditer(parsed_value):
	matched_string = match.group(0)
	parsed_string = matched_string.replace('t', f'{frame_idx}').replace("max_f" , f"{max_f}").replace('`','')
	value = numexpr.evaluate(parsed_string)
	parsed_value = parsed_value.replace(matched_string, str(value))
	return parsed_value

	def render_interpolation(args, anim_args, video_args, parseq_args, loop_args, controlnet_args, root):

	# use parseq if manifest is provided
	parseq_adapter = ParseqAdapter(parseq_args, anim_args, video_args, controlnet_args, loop_args)

	# expand key frame strings to values
	keys = DeformAnimKeys(anim_args) if not parseq_adapter.use_parseq else parseq_adapter.anim_keys

	# create output folder for the batch
	os.makedirs(args.outdir, exist_ok=True)
	print(f"Saving interpolation animation frames to {args.outdir}")

	# save settings.txt file for the current run
	save_settings_from_animation_run(args, anim_args, parseq_args, loop_args, controlnet_args, video_args, root)

	# Compute interpolated prompts
	if parseq_adapter.manages_prompts():
	print("Parseq prompts are assumed to already be interpolated - not doing any additional prompt interpolation")
	prompt_series = keys.prompts
	else:
	print("Generating interpolated prompts for all frames")
	prompt_series = interpolate_prompts(root.animation_prompts, anim_args.max_frames)

	state.job_count = anim_args.max_frames
	frame_idx = 0
	last_preview_frame = 0
	# INTERPOLATION MODE
	while frame_idx < anim_args.max_frames:
	# print data to cli
	prompt_to_print = get_parsed_value(prompt_series[frame_idx].strip(), frame_idx, anim_args.max_frames)

	if prompt_to_print.endswith("--neg"):
	prompt_to_print = prompt_to_print[:-5]
	print(f"\033[36mInterpolation frame: \033[0m{frame_idx}/{anim_args.max_frames} ")
	print(f"\033[32mSeed: \033[0m{args.seed}")
	print(f"\033[35mPrompt: \033[0m{prompt_to_print}")

	state.job = f"frame {frame_idx + 1}/{anim_args.max_frames}"
	state.job_no = frame_idx + 1

	if state.interrupted:
	break
	if state.skipped:
	print("\n PAUSED ")
	state.skipped = False
	while not state.skipped:
	time.sleep(0.1)
	print(" RESUMING ")

	# grab inputs for current frame generation
	args.prompt = prompt_to_print
	args.scale = keys.cfg_scale_schedule_series[frame_idx]
	args.pix2pix_img_cfg_scale = keys.pix2pix_img_cfg_scale_series[frame_idx]

	scheduled_sampler_name = keys.sampler_schedule_series[frame_idx].casefold() if anim_args.enable_sampler_scheduling and keys.sampler_schedule_series[frame_idx] is not None else None
	args.steps = int(keys.steps_schedule_series[frame_idx]) if anim_args.enable_steps_scheduling and keys.steps_schedule_series[frame_idx] is not None else args.steps
	scheduled_clipskip = int(keys.clipskip_schedule_series[frame_idx]) if anim_args.enable_clipskip_scheduling and keys.clipskip_schedule_series[frame_idx] is not None else None
	args.checkpoint = keys.checkpoint_schedule_series[frame_idx] if anim_args.enable_checkpoint_scheduling else None
	if anim_args.enable_subseed_scheduling:
	root.subseed = int(keys.subseed_schedule_series[frame_idx])
	root.subseed_strength = keys.subseed_strength_schedule_series[frame_idx]
	else:
	root.subseed, root.subseed_strength = keys.subseed_schedule_series[frame_idx], keys.subseed_strength_schedule_series[frame_idx]
	if parseq_adapter.manages_seed():
	anim_args.enable_subseed_scheduling = True
	root.subseed, root.subseed_strength = int(keys.subseed_schedule_series[frame_idx]), keys.subseed_strength_schedule_series[frame_idx]
	args.seed = int(keys.seed_schedule_series[frame_idx]) if (args.seed_behavior == 'schedule' or parseq_adapter.manages_seed()) else args.seed
	opts.data["CLIP_stop_at_last_layers"] = scheduled_clipskip if scheduled_clipskip is not None else opts.data["CLIP_stop_at_last_layers"]

	image = generate(args, keys, anim_args, loop_args, controlnet_args, root, parseq_adapter, frame_idx, sampler_name=scheduled_sampler_name)
	filename = f"{root.timestring}_{frame_idx:09}.png"

	save_image(image, 'PIL', filename, args, video_args, root)

	state.current_image = image

	if args.seed_behavior != 'schedule':
	args.seed = next_seed(args, root)

	last_preview_frame = render_preview(args, anim_args, video_args, root, frame_idx, last_preview_frame)

	frame_idx += 1