"""Media Server - FastAPI application entry point."""

import argparse
import logging
import sys
from contextlib import asynccontextmanager
from pathlib import Path

import uvicorn
from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.middleware.gzip import GZipMiddleware
from fastapi.responses import FileResponse
from fastapi.staticfiles import StaticFiles

from . import __version__
from .auth import get_token_label, token_label_var
from .config import settings, generate_default_config, get_config_dir
from .routes import audio_router, browser_router, callbacks_router, display_router, health_router, links_router, media_router, scripts_router
from .services import get_media_controller
from .services.websocket_manager import ws_manager


class TokenLabelFilter(logging.Filter):
    """Add token label to log records."""

    def filter(self, record):
        record.token_label = token_label_var.get("unknown")
        return True


def setup_logging():
    """Configure application logging with token labels."""
    # Create filter and handler
    token_filter = TokenLabelFilter()
    handler = logging.StreamHandler(sys.stdout)
    handler.addFilter(token_filter)

    logging.basicConfig(
        level=getattr(logging, settings.log_level.upper()),
        format="%(asctime)s - %(name)s - [%(token_label)s] - %(levelname)s - %(message)s",
        handlers=[handler],
    )


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Application lifespan handler."""
    setup_logging()
    logger = logging.getLogger(__name__)
    logger.info(f"Media Server starting on {settings.host}:{settings.port}")

    # Log all configured tokens
    for label, token in settings.api_tokens.items():
        logger.info(f"API Token [{label}]: {token[:8]}...")

    # Start WebSocket status monitor
    controller = get_media_controller()
    await ws_manager.start_status_monitor(controller.get_status)
    logger.info("WebSocket status monitor started")

    # Start audio visualizer (if enabled and dependencies available)
    analyzer = None
    if settings.visualizer_enabled:
        from .services.audio_analyzer import get_audio_analyzer

        analyzer = get_audio_analyzer(
            num_bins=settings.visualizer_bins,
            target_fps=settings.visualizer_fps,
            device_name=settings.visualizer_device,
        )
        if analyzer.available:
            if analyzer.start():
                await ws_manager.start_audio_monitor(analyzer)
                logger.info("Audio visualizer started")
            else:
                logger.warning("Audio visualizer failed to start (no loopback device?)")
        else:
            logger.info("Audio visualizer unavailable (install soundcard + numpy)")

    yield

    # Stop audio visualizer
    await ws_manager.stop_audio_monitor()
    if analyzer and analyzer.running:
        analyzer.stop()

    # Stop WebSocket status monitor
    await ws_manager.stop_status_monitor()
    logger.info("Media Server shutting down")


def create_app() -> FastAPI:
    """Create and configure the FastAPI application."""
    app = FastAPI(
        title="Media Server",
        description="REST API for controlling system media playback",
        version=__version__,
        lifespan=lifespan,
    )

    # Compress responses > 1KB
    app.add_middleware(GZipMiddleware, minimum_size=1000)

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

    # Add token logging middleware
    @app.middleware("http")
    async def token_logging_middleware(request: Request, call_next):
        """Extract token label and set in context for logging."""
        token_label = "unknown"

        # Try Authorization header
        auth_header = request.headers.get("authorization", "")
        if auth_header.startswith("Bearer "):
            token = auth_header[7:]
            label = get_token_label(token)
            if label:
                token_label = label

        # Try query parameter (for artwork endpoint)
        elif "token" in request.query_params:
            token = request.query_params["token"]
            label = get_token_label(token)
            if label:
                token_label = label

        token_label_var.set(token_label)
        response = await call_next(request)
        return response

    # Register routers
    app.include_router(audio_router)
    app.include_router(browser_router)
    app.include_router(callbacks_router)
    app.include_router(display_router)
    app.include_router(health_router)
    app.include_router(links_router)
    app.include_router(media_router)
    app.include_router(scripts_router)

    # Mount static files and serve UI at root
    static_dir = Path(__file__).parent / "static"
    if static_dir.exists():
        app.mount("/static", StaticFiles(directory=str(static_dir)), name="static")

        @app.get("/", include_in_schema=False)
        async def serve_ui():
            """Serve the Web UI."""
            return FileResponse(static_dir / "index.html")

    return app


app = create_app()


def main():
    """Main entry point for running the server."""
    parser = argparse.ArgumentParser(description="Media Server")
    parser.add_argument(
        "--host",
        default=settings.host,
        help=f"Host to bind to (default: {settings.host})",
    )
    parser.add_argument(
        "--port",
        type=int,
        default=settings.port,
        help=f"Port to bind to (default: {settings.port})",
    )
    parser.add_argument(
        "--generate-config",
        action="store_true",
        help="Generate a default configuration file and exit",
    )
    parser.add_argument(
        "--show-token",
        action="store_true",
        help="Show the current API token and exit",
    )

    args = parser.parse_args()

    if args.generate_config:
        config_path = generate_default_config()
        print(f"Configuration file generated at: {config_path}")
        print(f"API Token has been saved to the config file.")
        return

    if args.show_token:
        print(f"Config directory: {get_config_dir()}")
        print(f"\nAPI Tokens:")
        for label, token in settings.api_tokens.items():
            print(f"  {label:20} {token}")
        return

    uvicorn.run(
        "media_server.main:app",
        host=args.host,
        port=args.port,
        reload=False,
    )


if __name__ == "__main__":
    main()