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from fastapi import FastAPI, Query
from fastapi.responses import JSONResponse
from fastapi.middleware.cors import CORSMiddleware
from ytmusicapi import YTMusic
import yt_dlp

app = FastAPI(
    title="Farel Music API + Audio Link",
    description="Backend API Farel Music menggunakan Docker di HF Spaces",
    version="2.0.0"
)

# Aktifkan CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# --- PERBAIKAN DI SINI: Menyisipkan User-Agent agar tidak diblokir SSL/EOF oleh YouTube ---
# Kita buat object YTMusic kosong, lalu isi headers-nya secara manual sebelum dipakai.
try:
    yt = YTMusic()
    # Ganti headers bawaan dengan user-agent browser modern
    yt.headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36",
        "Accept": "*/*",
        "Accept-Language": "en-US,en;q=0.9",
        "Content-Type": "application/json",
        "X-Goog-AuthUser": "0",
        "Origin": "https://music.youtube.com"
    }
except Exception as e:
    yt = None
    print(f"Gagal menginisialisasi YTMusic: {e}")

def get_direct_audio_url(video_id: str):
    ydl_opts = {
        'format': 'bestaudio/best',
        'quiet': True,
        'no_warnings': True,
        'nocheckcertificate': True,
        'preferredcodec': 'm4a',
        # Tambahkan juga HTTP Headers untuk yt-dlp agar tidak diblokir saat ambil audio
        'http_headers': {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
            'Accept': '*/*',
            'Accept-Language': 'en-US,en;q=0.9',
        }
    }
    youtube_url = f"https://www.youtube.com/watch?v={video_id}"
    try:
        with yt_dlp.YoutubeDL(ydl_opts) as ydl:
            info = ydl.extract_info(youtube_url, download=False)
            return info.get('url')
    except Exception as e:
        print(f"Gagal ekstraksi audio: {e}")
        return None

@app.get("/")
def home():
    return {
        "status": "Online via Docker",
        "message": "Farel Music API Ready!",
        "endpoint": "/search?q=judul_lagu"
    }

@app.get("/search")
def search_music(q: str = Query(..., description="Kata kunci pencarian lagu")):
    if not q.strip():
        return JSONResponse(status_code=400, content={"error": "Query tidak boleh kosong."})
    
    if yt is None:
        return JSONResponse(status_code=500, content={"error": "YTMusic API bermasalah saat inisialisasi."})

    try:
        # Melakukan pencarian
        results = yt.search(q, filter="songs")
        formatted_results = []
        
        for item in results[:5]:  
            video_id = item.get('videoId')
            if not video_id:
                continue
                
            audio_url = get_direct_audio_url(video_id)
            thumbnails = item.get('thumbnails', [])
            thumbnail_url = thumbnails[-1]['url'] if thumbnails else None
            artists = [a['name'] for a in item.get('artists', [])]
            
            formatted_results.append({
                "id": video_id,
                "title": item.get('title'),
                "artists": artists,
                "album": item.get('album', {}).get('name', 'Single'),
                "duration": item.get('duration'),
                "thumbnail": thumbnail_url,
                "youtube_url": f"https://www.youtube.com/watch?v={video_id}",
                "audio_url": audio_url
            })
            
        return {
            "query": q,
            "total_results": len(formatted_results),
            "results": formatted_results
        }

    except Exception as e:
        return JSONResponse(status_code=500, content={"error": f"Terjadi kesalahan: {str(e)}"})