# main.py

import asyncio
import sys
import os
from pathlib import Path
from contextlib import asynccontextmanager

# ✅ MUST be set FIRST before anything async-related imports.
# On Windows, Uvicorn defaults to SelectorEventLoop which does NOT support
# subprocess creation (needed by Playwright to launch the browser).
# ProactorEventLoop supports subprocesses on Windows.
if sys.platform.startswith("win"):
    asyncio.set_event_loop_policy(asyncio.WindowsProactorEventLoopPolicy())

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles

# Import routers AFTER setting loop policy
from routes.auth_routes import router as auth_router
from routes.reports_routes import router as reports_router
from routes.user_routes import user_router
from routes.contact_routes import contact_router

# Import SSL monitor
from reports.ssl_monitor import start_ssl_monitor, stop_ssl_monitor

# Import Gemini token tracker
from reports.gemini_token_tracker import initialize_token_tracker

# Import Website Down Detector
from reports.website_down_detector import initialize_down_detector, stop_down_detector


@asynccontextmanager
async def lifespan(app: FastAPI):
    """
    Application lifespan manager.
    Starts SSL monitor, token tracker, and website downtime detector on startup.
    Stops all services on shutdown.
    """

    # Start SSL monitoring service
    try:
        start_ssl_monitor()
        print("✅ SSL Monitor initialized")
    except Exception as e:
        print(f"⚠️ Warning: Could not start SSL Monitor: {e}")

    # Initialize Gemini token tracker
    try:
        await initialize_token_tracker()
    except Exception as e:
        print(f"⚠️ Warning: Could not initialize Token Tracker: {e}")

    # Initialize Website Down Detector
    try:
        await initialize_down_detector()
        print("✅ Website Down Detector initialized (monitoring every 24h)")
    except Exception as e:
        print(f"⚠️ Warning: Could not initialize Website Down Detector: {e}")

    print("✨ Server is ready!\n")

    yield

    # Shutdown
    print("\n" + "="*60)
    print("🛑 Shutting down WebMentAI Backend API...")
    print("="*60)

    # Stop SSL monitoring service
    try:
        stop_ssl_monitor()
        print("✅ SSL Monitor stopped")
    except Exception as e:
        print(f"⚠️ Warning: Error stopping SSL Monitor: {e}")

    # Stop Website Down Detector
    try:
        await stop_down_detector()
        print("✅ Website Down Detector stopped")
    except Exception as e:
        print(f"⚠️ Warning: Error stopping Website Down Detector: {e}")

    print("="*60 + "\n")


app = FastAPI(
    title="WebMentAI Backend API",
    lifespan=lifespan
)


# Mount static files directory to serve assets (like logo)
assets_path = Path(__file__).parent / "assets"
if assets_path.exists():
    app.mount("/assets", StaticFiles(directory=str(assets_path)), name="assets")


app.include_router(reports_router)
app.include_router(auth_router)
app.include_router(user_router)
app.include_router(contact_router)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["http://localhost:3000"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

@app.get("/")
async def home():
    return {"message": "Welcome to the WebMentAI!"}