<?php
include __DIR__ . "/../config/connect.php";
include __DIR__ . "/send_to_app2.php";

// --- CONFIG LOGGING ---
$enableLogging = false;
$logFile = __DIR__ . '/webhook_log.jsonl';

function writeLog($data) {
    global $enableLogging, $logFile;
    if ($enableLogging) {
        $logEntry = [
            'timestamp' => date("Y-m-d H:i:s"),
            'data' => $data
        ];
        file_put_contents($logFile, json_encode($logEntry, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE) . PHP_EOL, FILE_APPEND);
    }
}

// --- GET: Verifikasi Webhook ---
if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    $mode = $_GET['hub_mode'] ?? $_GET['hub.mode'] ?? null;
    $token = $_GET['hub_verify_token'] ?? $_GET['hub.verify_token'] ?? null;
    $challenge = $_GET['hub_challenge'] ?? $_GET['hub.challenge'] ?? null;
    $phone_number_id = $_GET['phone_number_id'] ?? null;

    $verify_token_db = null;
    if ($phone_number_id) {
        try {
            $stmt = $pdo->prepare("SELECT verify_token FROM whatsapp_cloud_api WHERE number_id = :number_id");
            $stmt->execute([':number_id' => $phone_number_id]);
            $waAccount = $stmt->fetch(PDO::FETCH_ASSOC);
            $verify_token_db = $waAccount['verify_token'] ?? null;
        } catch (Exception $e) {
            writeLog(["event"=>"DB_ERROR_VERIFY_TOKEN","number_id"=>$phone_number_id,"error"=>$e->getMessage()]);
        }
    }

    if ($mode === 'subscribe' && $token && $token === ($verify_token_db ?? '')) {
        writeLog(["event" => "WEBHOOK_VERIFIED", "number_id" => $phone_number_id]);
        http_response_code(200);
        echo $challenge;
    } else {
        writeLog(["event" => "WEBHOOK_VERIFICATION_FAILED", "number_id" => $phone_number_id, "token" => $token]);
        http_response_code(403);
    }
    exit;
}

// --- POST: Terima pesan & status ---
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $input = file_get_contents('php://input');
    $data = json_decode($input, true);

    if (!$data || !isset($data['entry'])) {
        writeLog(["event" => "INVALID_JSON_OR_ENTRY"]);
        http_response_code(400);
        exit;
    }

    foreach ($data['entry'] as $entry) {
        foreach ($entry['changes'] ?? [] as $change) {
            $value = $change['value'] ?? [];

            // --- Pesan masuk ---
            foreach ($value['messages'] ?? [] as $message) {
                $from = $message['from'] ?? null;
                $type = $message['type'] ?? null;
                $phone_number_id = $value['metadata']['phone_number_id'] ?? null;
                if (!$phone_number_id || !$from) continue;

                try {
                    $stmt = $pdo->prepare("SELECT token_access FROM whatsapp_cloud_api WHERE number_id = :number_id");
                    $stmt->execute([':number_id' => $phone_number_id]);
                    $waAccount = $stmt->fetch(PDO::FETCH_ASSOC);
                    $access_token = $waAccount['token_access'] ?? null;
                } catch (Exception $e) {
                    writeLog(["event"=>"DB_ERROR_ACCESS_TOKEN","number_id"=>$phone_number_id,"error"=>$e->getMessage()]);
                    continue;
                }
                if (!$access_token) continue;

                $text = ($type === 'text') ? $message['text']['body'] ?? '' : '[Pesan non-teks: ' . $type . ']';
                writeLog(["event" => "INCOMING_MESSAGE", "from" => $from, "type" => $type, "text" => $text]);
                
                // Cek apakah nomor sudah ada di database
                $stmt = $pdo->prepare("SELECT * FROM contact_number_api WHERE whatsapp_number = :number_id");
                $stmt->execute([':number_id' => $from]);
                $waNumber = $stmt->fetch(PDO::FETCH_ASSOC);
                
                // Tentukan apakah sudah lewat 24 jam
                $shouldSend = false;
                if (!$waNumber) {
                    // Nomor baru → tambahkan ke DB dan tandai perlu kirim
                    $shouldSend = true;
                    $pdo->prepare("INSERT INTO contact_number_api (whatsapp_number, updated_at) VALUES (:number_id, NOW())")
                        ->execute([':number_id' => $from]);
                } else {
                    $lastUpdate = strtotime($waNumber['updated_at']);
                    $now = time();
                    $hoursPassed = ($now - $lastUpdate) / 3600;
                
                    if ($hoursPassed >= 24) {
                        $shouldSend = true;
                    }
                }
                
                if ($phone_number_id == '833144686543436') {
                    $tmp = 'customer_service_contact';
                } elseif ($phone_number_id == '789423254262077') {
                    $tmp = 'customer_service_phone';
                } elseif ($phone_number_id == '790168360853999') {
                    $tmp = '';
                } else {
                    $tmp = null;
                }
                
                if ($shouldSend) {
                    // --- Kirim balasan template ---
                    $reply = [
                        "messaging_product" => "whatsapp",
                        "to" => $from,
                        "type" => "template",
                        "template" => [
                            "name" => $tmp,
                            "language" => ["code" => "id"],
                            "components" => []
                        ]
                    ];
                
                    $url = "https://graph.facebook.com/v17.0/$phone_number_id/messages";
                    $ch = curl_init($url);
                    curl_setopt($ch, CURLOPT_HTTPHEADER, [
                        "Authorization: Bearer $access_token",
                        "Content-Type: application/json"
                    ]);
                    curl_setopt($ch, CURLOPT_POST, true);
                    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($reply));
                    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
                    $response = curl_exec($ch);
                    curl_close($ch);
                
                    // Kirim ke aplikasi 2
                    forwardToApp2([
                        "data"      => $reply,
                        "phone_id"  => $phone_number_id,
                        "respon"    => $response
                    ]);
                
                    // Update waktu eksekusi terakhir
                    $pdo->prepare("UPDATE contact_number_api SET updated_at = NOW() WHERE whatsapp_number = :number_id")
                        ->execute([':number_id' => $from]);
                }


                writeLog(["event"=>"REPLY_SENT","to"=>$from,"http_code"=>$http_code]);
            }

            // --- Status update ---
            foreach ($value['statuses'] ?? [] as $statusEvent) {
                $waMessageId = $statusEvent['id'] ?? null;
                $status = $statusEvent['status'] ?? null;

                // PHP 7.4 compatible
                switch ($status) {
                    case 'sent':      $finalStatus = 'PROSES'; break;
                    case 'delivered': $finalStatus = 'TERKIRIM'; break;
                    case 'read':      $finalStatus = 'DIBACA'; break;
                    case 'failed':    $finalStatus = 'GAGAL'; break;
                    default:          $finalStatus = strtoupper($status); break;
                }

                if ($waMessageId) {
                    try {
                        $stmtMsg = $pdo->prepare("SELECT id, status FROM master_pesan WHERE wa_message_id = :wa_message_id");
                        $stmtMsg->execute([':wa_message_id' => $waMessageId]);
                        $pesanDB = $stmtMsg->fetch(PDO::FETCH_ASSOC);
                    } catch (Exception $e) {
                        continue;
                    }

                    if ($pesanDB) {
                        try {
                            $stmtUpdate = $pdo->prepare("UPDATE master_pesan SET status = :status WHERE id = :id");
                            $stmtUpdate->execute([':status' => $finalStatus, ':id' => $pesanDB['id']]);
                            writeLog(["event"=>"STATUS_UPDATED","wa_message_id"=>$waMessageId,"new_status"=>$finalStatus]);
                        } catch (Exception $e) {}
                    }
                }
            }
        }
    }
    
    // --- Forward ke webhook baru (jika ada) ---
    $forwardUrl = "http://172.16.254.226/webhook/receive";
    
    try {
        $ch = curl_init($forwardUrl);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, ["Content-Type: application/json"]);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $input);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, 5);
        // Jika webhook baru masih HTTP, nonaktifkan verifikasi SSL sementara
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $result = curl_exec($ch);
        $err = curl_error($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
    
        writeLog([
            "event" => "FORWARDED_TO_NEW_WEBHOOK",
            "url" => $forwardUrl,
            "http_code" => $httpCode,
            "error" => $err ?: null
        ]);
    } catch (Exception $e) {
        writeLog(["event" => "FORWARD_FAILED", "error" => $e->getMessage()]);
    }

    http_response_code(200);
    echo "EVENT_RECEIVED";
    exit;
}

http_response_code(404);