<?php

namespace App\Controllers;

use App\Core\Request;
use App\Core\Response;
use App\Models\WooCommerceStore;
use App\Models\WhatsAppSession;

class WooCommerceController extends BaseController
{
    /**
     * Connect WooCommerce store.
     * Protected by AuthMiddleware.
     * Accessible via POST /api/integrations/woocommerce/connect
     */
    public function connect(Request $request, Response $response)
    {
        $body = $request->getBody();
        $storeUrl = $body['store_url'] ?? '';
        $consumerKey = $body['consumer_key'] ?? '';
        $consumerSecret = $body['consumer_secret'] ?? '';
        $webhookSecret = $body['webhook_secret'] ?? null;

        if (empty($storeUrl) || empty($consumerKey) || empty($consumerSecret)) {
            $response->status(400)->json([
                'status' => 'error',
                'message' => 'Missing store_url, consumer_key, or consumer_secret'
            ]);
            return;
        }

        try {
            $storeId = WooCommerceStore::saveStore(
                $request->company_id,
                $storeUrl,
                $consumerKey,
                $consumerSecret,
                $webhookSecret
            );

            // Generate delivery URL for webhooks to display to the user
            $appUrl = rtrim(getenv('APP_URL') ?: 'https://nabeh.intaleqapp.com', '/');
            $webhookUrl = $appUrl . '/api/webhooks/woocommerce?company_id=' . $request->company_id;

            $response->json([
                'status' => 'success',
                'message' => 'WooCommerce store connected successfully',
                'webhook_url' => $webhookUrl
            ]);
        } catch (\Exception $e) {
            $response->status(500)->json([
                'status' => 'error',
                'message' => 'Connection failed: ' . $e->getMessage()
            ]);
        }
    }

    /**
     * Get WooCommerce connection status.
     * Protected by AuthMiddleware.
     * Accessible via GET /api/integrations/woocommerce/status
     */
    public function status(Request $request, Response $response)
    {
        $store = WooCommerceStore::findByCompany($request->company_id);
        if ($store) {
            $appUrl = rtrim(getenv('APP_URL') ?: 'https://nabeh.intaleqapp.com', '/');
            $webhookUrl = $appUrl . '/api/webhooks/woocommerce?company_id=' . $request->company_id;

            $response->json([
                'status' => 'success',
                'connected' => true,
                'store_url' => $store['store_url'],
                'webhook_url' => $webhookUrl,
                'has_webhook_secret' => !empty($store['webhook_secret'])
            ]);
        } else {
            $response->json([
                'status' => 'success',
                'connected' => false
            ]);
        }
    }

    /**
     * Disconnect WooCommerce integration.
     * Protected by AuthMiddleware.
     * Accessible via POST /api/integrations/woocommerce/disconnect
     */
    public function disconnect(Request $request, Response $response)
    {
        WooCommerceStore::deleteByCompany($request->company_id);
        $response->json([
            'status' => 'success',
            'message' => 'WooCommerce integration disconnected successfully'
        ]);
    }

    /**
     * Handle incoming webhook from WooCommerce.
     * Accessible via POST /api/webhooks/woocommerce?company_id=XYZ
     */
    public function webhook(Request $request, Response $response)
    {
        $companyId = (int)($request->get('company_id') ?? 0);
        if (empty($companyId)) {
            $response->status(400)->json(['error' => 'Missing company_id query parameter']);
            return;
        }

        $store = WooCommerceStore::findByCompany($companyId);
        if (!$store) {
            $response->status(404)->json(['error' => 'Store connection details not found for this tenant']);
            return;
        }

        $rawPayload = file_get_contents('php://input');
        
        // 1. Verify signature if webhook_secret is configured
        if (!empty($store['webhook_secret'])) {
            $signatureHeader = $request->getHeader('x-wc-webhook-signature') ?: '';
            if (empty($signatureHeader)) {
                $response->status(401)->json(['error' => 'Missing x-wc-webhook-signature header']);
                return;
            }

            $calculated = base64_encode(hash_hmac('sha256', $rawPayload, $store['webhook_secret'], true));
            if (!hash_equals($calculated, $signatureHeader)) {
                error_log("[WooCommerce Webhook Error] Signature mismatch for company {$companyId}");
                $response->status(401)->json(['error' => 'Signature verification failed']);
                return;
            }
        }

        // 2. Parse payload
        $payload = json_decode($rawPayload, true);
        if (!$payload) {
            $response->status(400)->json(['error' => 'Invalid JSON payload']);
            return;
        }

        $topic = $request->getHeader('x-wc-webhook-topic') ?: '';
        if (empty($topic)) {
            $response->status(400)->json(['error' => 'Missing x-wc-webhook-topic header']);
            return;
        }

        // 3. Process events
        if ($topic === 'order.created' || $topic === 'order.updated') {
            $this->handleOrderWebhook($companyId, $topic, $payload);
        }

        $response->json(['status' => 'success']);
    }

    /**
     * Process order webhook events and send automated WhatsApp message
     */
    private function handleOrderWebhook(int $companyId, string $topic, array $order)
    {
        $orderId = $order['id'] ?? '';
        $customerName = trim(($order['billing']['first_name'] ?? '') . ' ' . ($order['billing']['last_name'] ?? ''));
        if (empty($customerName)) {
            $customerName = 'عميلنا العزيز';
        }
        $customerPhone = $order['billing']['phone'] ?? $order['shipping']['phone'] ?? '';
        $status = $order['status'] ?? '';
        $total = $order['total'] ?? '';
        $currency = $order['currency'] ?? 'USD';

        if (empty($customerPhone) || empty($orderId)) {
            return;
        }

        // Normalize phone number
        $customerPhone = preg_replace('/\D/', '', $customerPhone);
        if (substr($customerPhone, 0, 2) === '00') {
            $customerPhone = substr($customerPhone, 2);
        }
        // Normalize Saudi numbers starting with 05
        if (strlen($customerPhone) === 9 && $customerPhone[0] === '5') {
            $customerPhone = '966' . $customerPhone;
        } elseif (strlen($customerPhone) === 10 && substr($customerPhone, 0, 2) === '05') {
            $customerPhone = '966' . substr($customerPhone, 1);
        }

        // Formulate Arabic message based on topic
        $message = '';
        if ($topic === 'order.created') {
            $message = "مرحباً {$customerName}،\nتم استلام طلبك رقم ({$orderId}) بنجاح! 🎉\nإجمالي الفاتورة: {$total} {$currency}\nحالة الطلب الحالية: *قيد المراجعة*.\nشكرًا لتسوقك معنا!";
        } elseif ($topic === 'order.updated') {
            $translatedStatus = $this->translateStatus($status);
            $message = "مرحباً {$customerName}،\nتم تحديث حالة طلبك رقم ({$orderId}) إلى: *{$translatedStatus}*.\n";

            // If completed, add standard courier notice
            if ($status === 'completed') {
                $message .= "🚚 طلبك الآن في طريقه إليك! نتمنى لك تجربة ممتعة.";
            }
        }

        if (empty($message)) {
            return;
        }

        // Send WhatsApp Message via active session
        $session = WhatsAppSession::findByCompany($companyId);
        if (!$session || $session['status'] !== 'connected') {
            error_log("[WooCommerce Webhook Warning] Cannot send auto-notification: No active connected WhatsApp session for company: " . $companyId);
            return;
        }

        $this->sendWhatsAppNotification($session['session_key'], $customerPhone, $message);
    }

    /**
     * Translate WooCommerce order status to Arabic
     */
    private function translateStatus(string $status): string
    {
        $translations = [
            'pending' => 'بانتظار الدفع',
            'processing' => 'قيد التجهيز',
            'on-hold' => 'قيد الانتظار',
            'completed' => 'مكتمل',
            'cancelled' => 'ملغي',
            'refunded' => 'مسترجع',
            'failed' => 'فشل الدفع',
            'checkout-draft' => 'مسودة السلة'
        ];

        return $translations[$status] ?? $status;
    }

    /**
     * Send a WhatsApp message through the gateway
     */
    private function sendWhatsAppNotification(string $sessionKey, string $phone, string $message)
    {
        $gatewayUrl = rtrim(getenv('WHATSAPP_GATEWAY_URL') ?: 'http://localhost:3722', '/');
        if (substr($gatewayUrl, -4) === '/api') {
            $sendUrl = $gatewayUrl . '/messages/send';
        } else {
            $sendUrl = $gatewayUrl . '/api/messages/send';
        }

        $payload = json_encode([
            'session_key' => $sessionKey,
            'phone' => $phone,
            'message' => $message
        ]);

        $ch = curl_init($sendUrl);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Content-Type: application/json',
            'X-Webhook-Secret: ' . getenv('WEBHOOK_SECRET')
        ]);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
        
        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);

        if ($httpCode !== 200) {
            error_log("[WooCommerce Webhook Gateway Error] Failed to send WhatsApp notification. Gateway response: " . $response);
        }
    }
}