"""
Webhook endpoints for handling payment provider events
These endpoints receive events from payment providers like Stripe
"""

import structlog
from fastapi import APIRouter, Depends, HTTPException, status, Request
from typing import Dict, Any

from app.services.payment_service import PaymentService
from shared.auth.decorators import get_current_user_dep
from shared.monitoring.metrics import track_endpoint_metrics

logger = structlog.get_logger()
router = APIRouter()

def get_payment_service():
    try:
        return PaymentService()
    except Exception as e:
        logger.error("Failed to create payment service", error=str(e))
        raise HTTPException(status_code=500, detail="Payment service initialization failed")

@router.post("/webhooks/stripe")
async def stripe_webhook(
    request: Request,
    payment_service: PaymentService = Depends(get_payment_service)
):
    """
    Stripe webhook endpoint to handle payment events
    """
    try:
        # Get the payload
        payload = await request.body()
        sig_header = request.headers.get('stripe-signature')
        
        # In a real implementation, you would verify the signature
        # using the webhook signing secret
        # event = stripe.Webhook.construct_event(
        #     payload, sig_header, settings.STRIPE_WEBHOOK_SECRET
        # )
        
        # For now, we'll just log the event
        logger.info("Received Stripe webhook", payload=payload.decode('utf-8'))
        
        # Process different types of events
        # event_type = event['type']
        # event_data = event['data']['object']
        
        # Example processing for different event types:
        # if event_type == 'checkout.session.completed':
        #     # Handle successful checkout
        #     pass
        # elif event_type == 'customer.subscription.created':
        #     # Handle new subscription
        #     pass
        # elif event_type == 'customer.subscription.updated':
        #     # Handle subscription update
        #     pass
        # elif event_type == 'customer.subscription.deleted':
        #     # Handle subscription cancellation
        #     pass
        # elif event_type == 'invoice.payment_succeeded':
        #     # Handle successful payment
        #     pass
        # elif event_type == 'invoice.payment_failed':
        #     # Handle failed payment
        #     pass
        
        return {"success": True}
        
    except Exception as e:
        logger.error("Error processing Stripe webhook", error=str(e))
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Webhook error"
        )

@router.post("/webhooks/generic")
async def generic_webhook(
    request: Request,
    payment_service: PaymentService = Depends(get_payment_service)
):
    """
    Generic webhook endpoint that can handle events from any payment provider
    """
    try:
        # Get the payload
        payload = await request.json()
        
        # Log the event for debugging
        logger.info("Received generic webhook", payload=payload)
        
        # Process the event based on its type
        event_type = payload.get('type', 'unknown')
        event_data = payload.get('data', {})
        
        # Process different types of events
        if event_type == 'subscription.created':
            # Handle new subscription
            logger.info("Processing new subscription event", subscription_id=event_data.get('id'))
            # Update database with new subscription
        elif event_type == 'subscription.updated':
            # Handle subscription update
            logger.info("Processing subscription update event", subscription_id=event_data.get('id'))
            # Update database with subscription changes
        elif event_type == 'subscription.deleted':
            # Handle subscription cancellation
            logger.info("Processing subscription cancellation event", subscription_id=event_data.get('id'))
            # Update database with cancellation
        elif event_type == 'payment.succeeded':
            # Handle successful payment
            logger.info("Processing successful payment event", payment_id=event_data.get('id'))
            # Update payment status in database
        elif event_type == 'payment.failed':
            # Handle failed payment
            logger.info("Processing failed payment event", payment_id=event_data.get('id'))
            # Update payment status and notify user
        elif event_type == 'invoice.created':
            # Handle new invoice
            logger.info("Processing new invoice event", invoice_id=event_data.get('id'))
            # Store invoice information
        else:
            logger.warning("Unknown event type received", event_type=event_type)
        
        return {"success": True}
        
    except Exception as e:
        logger.error("Error processing generic webhook", error=str(e))
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Webhook error"
        )
