import logging
from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from api.routes import router
from config.settings import settings

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

logger = logging.getLogger(__name__)


@asynccontextmanager
async def lifespan(app: FastAPI):
    """
    Lifespan event handler for startup and shutdown
    """
    # Startup
    logger.info("=" * 50)
    logger.info(f"Starting {settings.api_title} v{settings.api_version}")
    logger.info("=" * 50)
    
    if settings.groq_api_key:
        logger.info(f"Groq API Key: Configured (length: {len(settings.groq_api_key)})")
        logger.info(f"Groq Model: {settings.groq_model}")
    else:
        logger.error("GROQ_API_KEY is NOT set!")
        logger.error("WARNING: API will NOT function without valid API key")
    
    logger.info("=" * 50)
    
    yield
    
    # Shutdown
    logger.info("Shutting down API...")


# Create FastAPI app with lifespan
app = FastAPI(
    title=settings.api_title,
    version=settings.api_version,
    description=settings.api_description,
    lifespan=lifespan
)

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

# Include routes
app.include_router(router, prefix="/api")


@app.get("/")
async def root():
    """Root endpoint"""
    return {
        "service": settings.api_title,
        "version": settings.api_version,
        "status": "running",
        "endpoints": {
            "docs": "/docs",
            "health": "/api/v1/health",
            "coding": "/api/coding",
            "upload": "/api/upload-file"
        }
    }


@app.get("/api/v1/health")
async def health_check():
    """Health check endpoint"""
    api_key_status = "configured" if settings.groq_api_key else "missing"
    
    return {
        "status": "healthy",
        "service": settings.api_title,
        "version": settings.api_version,
        "groq_api_key": api_key_status,
        "groq_model": settings.groq_model
    }


# Run server when executed directly
if __name__ == "__main__":
    import uvicorn
    uvicorn.run(
        "main:app",
        host="0.0.0.0",
        port=7860,
        reload=False
    )