"""FastAPI application - LeoCRM backend."""

from __future__ import annotations

from contextlib import asynccontextmanager

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

from app.config import get_settings
from app.core.middleware import CSRFMiddleware
from app.core.db import close_engine
from app.routes import auth, users, roles, tenants, health, notifications, companies


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Application lifespan: startup and shutdown."""
    yield
    await close_engine()


def create_app() -> FastAPI:
    """Create and configure the FastAPI application."""
    settings = get_settings()
    app = FastAPI(title="LeoCRM", version="1.0.0", lifespan=lifespan)

    app.add_middleware(
        CORSMiddleware,
        allow_origins=settings.cors_origin_list,
        allow_credentials=True,
        allow_methods=["GET", "POST", "PATCH", "PUT", "DELETE", "OPTIONS"],
        allow_headers=["Authorization", "Content-Type", "X-CSRF-Token", "X-Tenant-ID"],
        max_age=3600,
    )
    app.add_middleware(CSRFMiddleware)

    app.include_router(health.router)
    app.include_router(auth.router)
    app.include_router(users.router)
    app.include_router(roles.router)
    app.include_router(tenants.router)
    app.include_router(notifications.router)
    app.include_router(companies.router)

    return app


app = create_app()