import os
from dotenv import load_dotenv
from fastapi import APIRouter, FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from starlette.middleware.authentication import AuthenticationMiddleware

load_dotenv()

from app.routers import (
    auth_v1,
    chargepoint_v1,
    id_token_v1,
    me_v1,
    meter_value_v1,
    ocpp_v1,
    transaction_v1,
    user_v1
)
from app.security.websocket_auth_backend import BasicAuthBackend

def create_app():
    # Common app config
    title="LibreCharge"
    version="0.2.0"
    summary="Simple implementation of a basic OCPP 2.0.1 compliant central system (backend) for EV charging stations"
    responses={404: {"description": "Not found"}}

    # Root FastAPI app
    root_app = FastAPI(
        title=title,
        version=version,
        summary=summary,
        responses=responses,
        docs_url=None,
        redoc_url=None,
    )

    # FastAPI app for OCPP handler
    ocpp_app = FastAPI(
        title=title,
        version=version,
        summary=summary,
        responses=responses,
        docs_url=None,
        redoc_url=None,
    )
    ocpp_app.include_router(ocpp_v1.router)
    ocpp_app.add_middleware(AuthenticationMiddleware, backend=BasicAuthBackend())
    root_app.mount(path="/v1/ocpp", app=ocpp_app)

    # FastAPI app for REST API
    api_app = FastAPI(
        title=title,
        version=version,
        summary=summary,
        responses=responses,
    )
    
    api_v1_router = APIRouter(
        prefix="/v1"
    )
    api_v1_router.include_router(auth_v1.router)
    api_v1_router.include_router(chargepoint_v1.router)
    api_v1_router.include_router(id_token_v1.router)
    api_v1_router.include_router(me_v1.router)
    api_v1_router.include_router(user_v1.router)
    api_v1_router.include_router(meter_value_v1.router)
    api_v1_router.include_router(transaction_v1.router)

    api_app.include_router(api_v1_router)
    root_app.mount(path="/api", app=api_app)

    # Serve static files if existent
    if os.path.isdir('static'):
        static_files = StaticFiles(directory="static", html=True)
        root_app.mount(path="/", app=static_files)

    return root_app

app = create_app()