from fastapi import FastAPI
from starlette.middleware.sessions import SessionMiddleware
from config.settings import SECRET_KEY, validate_config


def create_app() -> FastAPI:
    """Create and configure FastAPI application"""
    app = FastAPI(title="Web Pedidos Klein - FastAPI Backend")
    
    # Add SessionMiddleware
    app.add_middleware(
        SessionMiddleware,
        secret_key=SECRET_KEY,
        max_age=60 * 60  # max_age in seconds for Starlette
    )
    
    return app


def setup_routes(app: FastAPI):
    """Setup all application routes"""
    from routes import chat, users, products, orders, static
    from fastapi import Depends
    from auth.security import protect_chat_api
    
    # Chat routes
    app.add_api_route("/api/chat/init-chat", chat.init_chat, methods=["GET"], summary="Initialize chat and get anti-abuse token")
    app.add_api_route("/api/chat/completions", chat.chat_completions, methods=["POST"], 
                     summary="Get chat completions from OpenAI", dependencies=[Depends(protect_chat_api)])
    
    # User routes
    app.add_api_route("/api/existsUser", users.exists_user, methods=["POST"], summary="Check if user exists")
    
    # Product routes
    app.add_api_route("/api/get_products", products.get_products, methods=["GET"], summary="Get products")
    
    # Order routes
    app.add_api_route("/api/printer/order", orders.printer_order, methods=["POST"], 
                     summary="Printer order", dependencies=[Depends(protect_chat_api)])
    
    # Static routes
    from fastapi.responses import HTMLResponse
    app.add_api_route("/", static.serve_index_html, methods=["GET"], 
                     response_class=HTMLResponse, include_in_schema=False)
    
    # Mount static files
    static.mount_static_files(app)