from fastapi import APIRouter, HTTPException, Request
from fastapi.responses import JSONResponse
import stripe
from app.core.config import settings
from pydantic import BaseModel

router = APIRouter()
stripe.api_key = settings.STRIPE_SECRET_KEY

# Utilisation des variables d'environnement pour les price IDs
STRIPE_PRICE_IDS = {
    'starter': settings.STRIPE_PRICE_ID_STARTER,
    'pro': settings.STRIPE_PRICE_ID_PRO,
    'business': settings.STRIPE_PRICE_ID_BUSINESS
}

class SubscriptionRequest(BaseModel):
    plan_id: str
    user_id: str

class PaymentSuccessRequest(BaseModel):
    session_id: str

@router.post("/create-subscription")
async def create_subscription(request: SubscriptionRequest):
    try:
        price_id = STRIPE_PRICE_IDS.get(request.plan_id)
        print(f"Plan ID reçu: {request.plan_id}")
        print(f"Price ID trouvé: {price_id}")
        print(f"Mode Stripe: {stripe.api_key.startswith('sk_test_') and 'TEST' or 'LIVE'}")
        
        if not price_id:
            raise HTTPException(status_code=400, detail=f"Plan non trouvé: {request.plan_id}")

        session = stripe.checkout.Session.create(
            payment_method_types=['card'],
            line_items=[{
                'price': price_id,
                'quantity': 1,
            }],
            mode='subscription',
            success_url=f"{settings.FRONTEND_URL}/generate?session_id={{CHECKOUT_SESSION_ID}}",
            cancel_url=f"{settings.FRONTEND_URL}/tokens",
            metadata={
                'user_id': request.user_id,
                'plan_id': request.plan_id
            }
        )
        return {"sessionId": session.id}
    except Exception as e:
        print(f"Erreur complète: {str(e)}")
        raise HTTPException(status_code=400, detail=str(e))

@router.post("/webhook")
async def stripe_webhook(request: Request):
    payload = await request.body()
    sig_header = request.headers.get("stripe-signature")
    
    try:
        event = stripe.Webhook.construct_event(
            payload, sig_header, settings.STRIPE_WEBHOOK_SECRET
        )
        
        if event["type"] == "checkout.session.completed":
            session = event["data"]["object"]
            user_id = session["metadata"]["user_id"]
            plan_id = session["metadata"]["plan_id"]
            
            # Au lieu de mettre à jour Firebase, on renvoie les informations
            return {
                "status": "success",
                "user_id": user_id,
                "plan_id": plan_id
            }
            
        return {"status": "success"}
    except Exception as e:
        raise HTTPException(status_code=400, detail=str(e))

@router.post("/create-webhook")
async def create_webhook_endpoint():
    try:
        endpoint = stripe.WebhookEndpoint.create(
            url=f"{settings.FRONTEND_URL}/api/webhook",
            enabled_events=[
                "checkout.session.completed",
                "customer.subscription.created",
                "customer.subscription.deleted",
                "invoice.paid",
                "invoice.payment_failed"
            ],
            description="Endpoint pour la gestion des abonnements"
        )
        
        # Sauvegarder la clé secrète dans les variables d'environnement
        webhook_secret = endpoint.secret
        return {
            "status": "success",
            "endpoint_id": endpoint.id,
            "webhook_secret": webhook_secret  # À stocker dans .env
        }
    except Exception as e:
        raise HTTPException(status_code=400, detail=str(e))

@router.post("/payment-success")
async def handle_payment_success(request: PaymentSuccessRequest):
    try:
        print("=== Début du traitement payment-success ===")
        
        # Récupérer la session Stripe
        session = stripe.checkout.Session.retrieve(request.session_id)
        
        # Vérifier que le paiement n'a pas déjà été traité
        if session.metadata.get('processed') == 'true':
            return {
                "status": "already_processed",
                "message": "Ce paiement a déjà été traité"
            }
        
        # Vérifier que le paiement est bien complété
        if session.payment_status != 'paid':
            raise HTTPException(
                status_code=400, 
                detail="Le paiement n'est pas complété"
            )
            
        user_id = session.metadata.get('user_id')
        plan_id = session.metadata.get('plan_id')
        
        if not user_id or not plan_id:
            raise HTTPException(
                status_code=400,
                detail="Informations utilisateur manquantes"
            )
            
        # Marquer la session comme traitée
        stripe.checkout.Session.modify(
            session.id,
            metadata={'processed': 'true'}
        )
        
        return {
            "status": "success",
            "user_id": user_id,
            "plan_id": plan_id
        }
        
    except Exception as e:
        print(f"Erreur lors du traitement: {str(e)}")
        raise HTTPException(status_code=400, detail=str(e))