import logging
from contextlib import asynccontextmanager
from pathlib import Path

from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse

from config import load_config
from mqtt_bridge import start_mqtt
from routes.config_routes import router as config_router
from routes.ws_routes import router as ws_router

logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(name)s: %(message)s")
logger = logging.getLogger(__name__)

FRONTEND_DIR = Path(__file__).parent.parent / "frontend" / "dist"


@asynccontextmanager
async def lifespan(app: FastAPI):
    config = load_config()
    logger.info(f"Loaded config: {config.title} with {len(config.cameras)} cameras")
    start_mqtt()
    yield


app = FastAPI(title="Camera Viewer", lifespan=lifespan)

app.include_router(config_router)
app.include_router(ws_router)

# Serve frontend static files
if FRONTEND_DIR.exists():
    app.mount("/assets", StaticFiles(directory=FRONTEND_DIR / "assets"), name="assets")

    @app.get("/{full_path:path}")
    async def serve_frontend(full_path: str):
        # Try to serve the exact file first
        file_path = FRONTEND_DIR / full_path
        if full_path and file_path.exists() and file_path.is_file():
            return FileResponse(file_path)
        # Fall back to index.html for SPA routing
        return FileResponse(FRONTEND_DIR / "index.html")