"""FastAPI application entry point.

Configures CORS, registers routers under /api/v1, exposes health endpoint.
"""

from contextlib import asynccontextmanager

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

from app.config import settings
from app.routers import auth, contacts, copilot, datev, files, ocr, sales, users, vehicles


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Application startup and shutdown lifecycle."""
    # Startup: could run alembic migrations here in production
    yield
    # Shutdown: cleanup resources


app = FastAPI(
    title=settings.APP_NAME,
    description="ERP Nutzfahrzeuge Backend API",
    version="1.0.0",
    lifespan=lifespan,
)

# CORS configuration from settings
app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.cors_origins_list,
    allow_credentials=True,
    allow_methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS"],
    allow_headers=["*"],
)

# API v1 router
api_v1_router = APIRouter(prefix="/api/v1")
api_v1_router.include_router(auth.router)
api_v1_router.include_router(users.router)
api_v1_router.include_router(vehicles.router)
api_v1_router.include_router(contacts.router)
api_v1_router.include_router(files.router)
api_v1_router.include_router(ocr.router)
api_v1_router.include_router(sales.router)
api_v1_router.include_router(datev.router)
api_v1_router.include_router(copilot.router)

# Health endpoint (no auth required)
@api_v1_router.get("/health", tags=["health"])
async def health_check():
    """Health check endpoint."""
    return {"status": "ok"}


app.include_router(api_v1_router)


@app.get("/")
async def root():
    """Root redirect info."""
    return {"name": settings.APP_NAME, "version": "1.0.0", "docs": "/docs"}