"""
FastAPI Application Entry Point
Enterprise-grade FastAPI application with proper structure and middleware
"""
import logging
import uvicorn
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from src.config.config import settings
from src.config.migrate import migrate_sync

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)

# Import routers

# ========== DATABASE MIGRATIONS ==========
# Run database migrations on application startup
logger.info("🔄 Running database migrations...")
if not migrate_sync(settings.DATABASE_URL):
    logger.warning("⚠️  Some migrations failed, but application will continue")

# ========== FASTAPI APPLICATION INITIALIZATION ==========
# Initialize FastAPI application
app = FastAPI(
    title=settings.APP_NAME,
    version=settings.APP_VERSION,
    description="",
    docs_url="/docs" if settings.DEBUG else None,
    redoc_url="/redoc" if settings.DEBUG else None,
    openapi_url="/openapi.json" if settings.DEBUG else None,
)

# CORS Middleware Configuration
app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.CORS_ORIGINS if isinstance(settings.CORS_ORIGINS, list) else ["*"],
    allow_credentials=True,
    allow_methods=settings.CORS_METHODS if isinstance(settings.CORS_METHODS, list) else ["*"],
    allow_headers=settings.CORS_HEADERS if isinstance(settings.CORS_HEADERS, list) else ["*"],
)

# Include routers
import src.models  # Trigger model registration
from src.routes.index import router as api_router
app.include_router(api_router)

@app.on_event("startup")
async def startup_event():
    """
    Application startup event handler
    Performs initialization tasks before accepting requests
    """
    logger.info("🚀 FastAPI application started successfully")
    logger.info(f"📚 API Documentation available at: http://localhost:{settings.PORT}/docs")

@app.on_event("shutdown")
async def shutdown_event():
    """
    Application shutdown event handler
    Performs cleanup tasks when application stops
    """
    logger.info("🛑 FastAPI application shutting down")

@app.get("/")
async def root():
    """
    Root endpoint - API information and health status
    """
    return {
        "message": "Welcome to  API",
        "version": settings.APP_VERSION,
        "docs": "/docs" if settings.DEBUG else "disabled",
        "status": "running"
    }

@app.get("/health")
async def health_check():
    """
    Health check endpoint for monitoring
    """
    return {
        "status": "healthy",
        "app": settings.APP_NAME,
        "version": settings.APP_VERSION
    }

if __name__ == "__main__":
    uvicorn.run(
        "main:app",
        host=settings.HOST,
        port=settings.PORT,
        reload=settings.DEBUG
    )