from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse
import logging
from pathlib import Path
import sys

# Import config and routers
from config import config
from routers import api
from video_creator.libraries.tts_client import TTSClient
from video_creator.libraries.whisper_client import WhisperClient
from video_creator.libraries.pexels_client import PexelsClient
from video_creator.music_manager import MusicManager
from video_creator.short_creator import ShortCreator

# Setup logging
logging.basicConfig(
    level=config.log_level.upper(),
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
    handlers=[logging.StreamHandler(sys.stdout)]
)
logger = logging.getLogger(__name__)

# Create FastAPI app
app = FastAPI(
    title="Short Video Maker API",
    description="""
    # Short Video Maker REST API
    
    Create engaging short-form videos for TikTok, Instagram Reels, and YouTube Shorts.
    
    ## Features
    - 🎙️ Text-to-speech narration (Kokoro)
    - 📝 Automatic caption generation (Whisper)
    - 🎥 Background videos from Pexels
    - 🎵 Background music with mood selection
    - 📱 Portrait & landscape support
    
    ## Workflow
    1. **Create Video**: POST to `/api/short-video` with scenes and config
    2. **Check Status**: GET `/api/short-video/{id}/status` to monitor progress
    3. **Download**: GET `/api/short-video/{id}` when status is "ready"
    
    ## Environment Setup
    Required environment variables:
    - `PEXELS_API_KEY` - Get from https://www.pexels.com/api/
    - `HF_TTS` - Your TTS service endpoint URL
    """,
    version="2.0.0",
    contact={
        "name": "Short Video Maker",
        "url": "https://huggingface.co/spaces"
    }
)

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


@app.on_event("startup")
async def startup_event():
    """Initialize services on startup"""
    logger.info("Starting Short Video Maker on Hugging Face Spaces...")
    
    # Ensure directories exist
    config.ensure_directories()
    
    # Validate environment variables
    # Validate environment variables
    if not config.pexels_api_key:
        logger.warning("PEXELS_API_KEY is missing! Video generation will fail.")
    
    if not config.hf_tts:
        logger.warning("HF_TTS is missing! TTS will fail.")
    
    # Initialize components
    logger.info("Initializing TTS client...")
    tts_client = TTSClient(config.hf_tts)
    
    logger.info("Initializing Whisper client...")
    whisper_client = WhisperClient(
        model_name=config.whisper_model,
        model_dir=config.whisper_model_dir
    )
    
    logger.info("Initializing Pexels client...")
    pexels_client = PexelsClient(config.pexels_api_key)
    
    logger.info("Initializing music manager...")
    music_manager = MusicManager(config.music_dir_path)
    try:
        music_manager.ensure_music_files_exist()
    except FileNotFoundError as e:
        logger.error(f"Music setup error: {e}")
        logger.warning("Creating empty music directory - you'll need to add music files")
        config.music_dir_path.mkdir(parents=True, exist_ok=True)
    
    logger.info("Initializing short creator...")
    short_creator = ShortCreator(
        config=config,
        tts_client=tts_client,
        whisper_client=whisper_client,
        pexels_client=pexels_client,
        music_manager=music_manager
    )
    
    # Set the global short creator in the router
    api.set_short_creator(short_creator)
    
    logger.info("Short Video Maker started successfully!")
    logger.info(f"Server running on port {config.port}")


@app.get("/health")
async def health_check():
    """Health check endpoint"""
    return {"status": "ok"}


@app.get("/")
async def read_root():
    """Serve the web UI"""
    static_path = Path(__file__).parent / "static" / "index.html"
    if static_path.exists():
        return FileResponse(static_path)
    return {"message": "Short Video Maker API", "docs": "/docs"}


# Include API router
app.include_router(api.router)

# Mount static files if they exist
static_dir = Path(__file__).parent / "static"
if static_dir.exists():
    app.mount("/static", StaticFiles(directory=str(static_dir)), name="static")


if __name__ == "__main__":
    import uvicorn
    uvicorn.run(
        "app:app",
        host="0.0.0.0",
        port=config.port,
        log_level=config.log_level.lower()
    )