from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from app.core.config import settings
from app.db.session import get_db, engine
from app.db.base import Base
from app.api import auth, categories, suppliers, items, stock_transactions
from app.crud import user as user_crud
from app.schemas.user import UserCreate

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

app = FastAPI(
    title=settings.PROJECT_NAME,
    version=settings.PROJECT_VERSION,
    openapi_url="/openapi.json",
)

# Set up CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.BACKEND_CORS_ORIGINS,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Include routers
app.include_router(auth.router, prefix="/auth", tags=["authentication"])
app.include_router(categories.router, prefix="/categories", tags=["categories"])
app.include_router(suppliers.router, prefix="/suppliers", tags=["suppliers"])
app.include_router(items.router, prefix="/items", tags=["items"])
app.include_router(
    stock_transactions.router, prefix="/stock-transactions", tags=["stock-transactions"]
)


@app.get("/")
async def root():
    return {
        "title": settings.PROJECT_NAME,
        "version": settings.PROJECT_VERSION,
        "description": "API for managing inventory in small businesses",
        "documentation": "/docs",
        "health_check": "/health",
    }


@app.get("/health")
async def health_check():
    return {
        "status": "healthy",
        "service": settings.PROJECT_NAME,
        "version": settings.PROJECT_VERSION,
    }


@app.on_event("startup")
async def startup_event():
    # Create first superuser if it doesn't exist
    db = next(get_db())
    user = user_crud.get_by_email(db, email=settings.FIRST_SUPERUSER_EMAIL)
    if not user:
        user_in = UserCreate(
            email=settings.FIRST_SUPERUSER_EMAIL,
            password=settings.FIRST_SUPERUSER_PASSWORD,
            full_name="System Administrator",
        )
        user = user_crud.create(db, obj_in=user_in)
        user.is_superuser = True
        db.add(user)
        db.commit()


if __name__ == "__main__":
    import uvicorn

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