"""Main FastAPI application."""

import logging
from pathlib import Path
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from app.config import settings
from app.database import init_db
from app.api import api_router

# Configure logging
def setup_logging():
    """Configure application logging."""
    log_dir = Path(settings.log_file).parent
    log_dir.mkdir(parents=True, exist_ok=True)
    
    logging.basicConfig(
        level=getattr(logging, settings.log_level.upper()),
        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        handlers=[
            logging.FileHandler(settings.log_file),
            logging.StreamHandler()
        ]
    )

setup_logging()
logger = logging.getLogger(__name__)

# Create FastAPI application
app = FastAPI(
    title=settings.app_name,
    version=settings.app_version,
    description="Network scanning and visualization tool API",
    docs_url="/docs",
    redoc_url="/redoc"
)

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

# Include API router
app.include_router(api_router, prefix=settings.api_prefix)


@app.on_event("startup")
async def startup_event():
    """Initialize application on startup."""
    logger.info(f"Starting {settings.app_name} v{settings.app_version}")
    
    # Initialize database
    try:
        init_db()
        logger.info("Database initialized successfully")
    except Exception as e:
        logger.error(f"Failed to initialize database: {e}")
        raise


@app.on_event("shutdown")
async def shutdown_event():
    """Cleanup on application shutdown."""
    logger.info("Shutting down application")


@app.get("/")
async def root():
    """Root endpoint."""
    return {
        "name": settings.app_name,
        "version": settings.app_version,
        "status": "running",
        "docs": "/docs"
    }


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


if __name__ == "__main__":
    import uvicorn
    
    uvicorn.run(
        "main:app",
        host="0.0.0.0",
        port=8000,
        reload=False,
        log_level=settings.log_level.lower()
    )