import os

from dotenv import load_dotenv

# ===========================
# !!! ATTENTION !!!
# KEEP THIS AT THE TOP TO ENSURE ENVIRONMENT VARIABLES ARE LOADED BEFORE ANY IMPORTS
# ===========================
load_dotenv()

import os
from contextlib import asynccontextmanager

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from loguru import logger

from src.controllers import api_router
from src.utils import model_manager


@asynccontextmanager
async def lifespan(app: FastAPI):
    try:
        logger.info("Starting up the application...")
        await model_manager.ensure_models_loaded()
        logger.info("Application started successfully...")
        yield
    except Exception as e:
        logger.error(f"Error during startup: {str(e)}")
        raise
    finally:
        logger.info("Application shutdown complete.")


app = FastAPI(lifespan=lifespan)


app.add_middleware(
    CORSMiddleware,
    allow_origins=[
        origin.strip()
        for origin in os.getenv(
            "CORS_ALLOW_ORIGINS", "http://localhost, http://127.0.0.1"
        ).split(",")
    ],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.get("/")
async def check_health():
    return {"response": "Service is healthy!"}


app.include_router(api_router, prefix="/api")