<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\PackagePurchase;
use App\Models\EventPackage;
use App\Models\TenantPackage;
use Illuminate\Http\Request;
use Stripe\Webhook;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\DB;

use Stripe\Exception\SignatureVerificationException;

class StripeWebhookController extends Controller
{
    public function handleWebhook(Request $request)
    {
        $payload = $request->getContent();
        $sigHeader = $request->header('Stripe-Signature');
        $endpointSecret = config('services.stripe.webhook_secret');

        try {
            $event = Webhook::constructEvent(
                $payload, $sigHeader, $endpointSecret
            );
        } catch (SignatureVerificationException $e) {
            return response()->json(['error' => 'Invalid signature'], 400);
        } catch (\UnexpectedValueException $e) {
            return response()->json(['error' => 'Invalid payload'], 400);
        }

        // Handle the event
        switch ($event['type']) {
            case 'payment_intent.succeeded':
                $paymentIntent = $event['data']['object'];
                $this->handlePaymentIntentSucceeded($paymentIntent);
                break;

            case 'invoice.paid':
                $invoice = $event['data']['object'];
                $this->handleInvoicePaid($invoice);
                break;

            default:
                \Log::info('Unhandled Stripe event', ['type' => $event['type']]);
        }

        return response()->json(['status' => 'success'], 200);
    }

    private function handlePaymentIntentSucceeded(array $paymentIntent)
    {
        $metadata = $paymentIntent['metadata'];
        $packageId = $metadata['package_id'];
        $type = $metadata['type'];

        \DB::transaction(function () use ($paymentIntent, $metadata, $packageId, $type) {
            // Create purchase record
            $purchase = PackagePurchase::create([
                'package_id' => $packageId,
                'type' => $type,
                'provider_id' => 'stripe',
                'transaction_id' => $paymentIntent['id'],
                'price' => $paymentIntent['amount_received'] / 100,
                'metadata' => $metadata,
            ]);

            if ($type === 'endcustomer_event') {
                $eventId = $metadata['event_id'];
                EventPackage::create([
                    'event_id' => $eventId,
                    'package_id' => $packageId,
                    'package_purchase_id' => $purchase->id,
                    'used_photos' => 0,
                    'used_guests' => 0,
                    'expires_at' => now()->addDays(30), // Default, or from package
                ]);
            } elseif ($type === 'reseller_subscription') {
                $tenantId = $metadata['tenant_id'];
                TenantPackage::create([
                    'tenant_id' => $tenantId,
                    'package_id' => $packageId,
                    'package_purchase_id' => $purchase->id,
                    'used_events' => 0,
                    'active' => true,
                    'expires_at' => now()->addYear(),
                ]);
            }
        });
    }

    private function handleInvoicePaid(array $invoice)
    {
        $subscription = $invoice['subscription'];
        $metadata = $subscription['metadata'] ?? [];

        if (isset($metadata['tenant_id'])) {
            $tenantId = $metadata['tenant_id'];
            $packageId = $metadata['package_id'];

            // Renew or create tenant package
            $tenantPackage = TenantPackage::where('tenant_id', $tenantId)
                ->where('package_id', $packageId)
                ->where('stripe_subscription_id', $subscription)
                ->first();

            if ($tenantPackage) {
                $tenantPackage->update([
                    'active' => true,
                    'expires_at' => now()->addYear(),
                ]);
            } else {
                TenantPackage::create([
                    'tenant_id' => $tenantId,
                    'package_id' => $packageId,
                    'stripe_subscription_id' => $subscription,
                    'used_events' => 0,
                    'active' => true,
                    'expires_at' => now()->addYear(),
                ]);
            }

            // Create purchase record
            PackagePurchase::create([
                'package_id' => $packageId,
                'type' => 'reseller_subscription',
                'provider_id' => 'stripe',
                'transaction_id' => $invoice['id'],
                'price' => $invoice['amount_paid'] / 100,
                'metadata' => $metadata,
            ]);
        }
    }
}