import logging
from contextlib import asynccontextmanager
from fastapi import FastAPI, Response
from fastapi.middleware.cors import CORSMiddleware
from app.db.session import engine
from app.db.base import Base
from app.routers import monitors, checks, scheduler
from app.services.scheduler import uptime_scheduler

# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

# Create database tables
Base.metadata.create_all(bind=engine)


@asynccontextmanager
async def lifespan(app: FastAPI):
    # Startup
    logger.info("Starting Uptime Monitoring API...")
    uptime_scheduler.start()
    yield
    # Shutdown
    logger.info("Shutting down Uptime Monitoring API...")
    uptime_scheduler.stop()


app = FastAPI(
    title="Uptime Monitoring API",
    description="API for monitoring website/endpoint uptime and performance",
    version="1.0.0",
    openapi_url="/openapi.json",
    lifespan=lifespan,
)

# Add CORS middleware
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=False,  # Must be False when using wildcard origins
    allow_methods=["GET", "POST", "PUT", "DELETE", "OPTIONS"],
    allow_headers=["*"],
    expose_headers=["*"],
)

# Include routers
app.include_router(monitors.router, prefix="/api/v1")
app.include_router(checks.router, prefix="/api/v1")
app.include_router(scheduler.router, prefix="/api/v1")


@app.get("/")
async def root():
    return {
        "title": "Uptime Monitoring API",
        "documentation": "/docs",
        "health_check": "/health",
    }


@app.get("/health")
async def health_check():
    return {"status": "healthy", "service": "uptime-monitoring-api"}


@app.options("/{full_path:path}")
async def options_handler(full_path: str):
    """Handle preflight OPTIONS requests"""
    response = Response()
    response.headers["Access-Control-Allow-Origin"] = "*"
    response.headers["Access-Control-Allow-Methods"] = "GET, POST, PUT, DELETE, OPTIONS"
    response.headers["Access-Control-Allow-Headers"] = "*"
    response.headers["Access-Control-Max-Age"] = "3600"
    return response


if __name__ == "__main__":
    import uvicorn

    uvicorn.run(app, host="0.0.0.0", port=8000)