<?php
// File: register_passenger.php

// إعدادات إظهار الأخطاء
ini_set('display_errors', 0);
error_reporting(E_ALL);
$allowRegistration = true;
require_once __DIR__ . '/../../connect.php';

// Rate Limiting: الحماية من البرمجيات الخبيثة والتسجيل العشوائي
$rateLimiter = new RateLimiter($redis);
$rateLimiter->enforce(RateLimiter::identifier(), 'register_passenger');


// تعريف بادئة للوج (Tag) لسهولة البحث عنها في ملف الأخطاء
$logTag = "[Register_Debug_passenger]";

$step = 0;

try {
    // ======================================================
    // Step 1: استقبال البيانات
    // ======================================================
    $step = 1;
    $phoneNumber = filterRequest("phone_number");
    $firstName   = filterRequest("first_name");
    $lastName    = filterRequest("last_name");
    $email       = filterRequest("email"); 

    // طباعة وصول البيانات (مع إخفاء جزء من الرقم)
    error_log("$logTag Step 1: Received request. Phone: " . substr($phoneNumber, 0, 7) . "*****");

    // ======================================================
    // Step 2: التحقق من المدخلات
    // ======================================================
    $step = 2;
    if (empty($phoneNumber) || empty($firstName) || empty($lastName)) {
        error_log("$logTag Step 2 Error: Missing required fields.");
        jsonError("Required fields are missing.");
        exit();
    }

    // ======================================================
    // Step 3: معالجة الإيميل
    // ======================================================
    $step = 3;
    if (empty($email)) {
        $email = $phoneNumber . '@intaleqapp.com';
        error_log("$logTag Step 3: Email was empty, generated default: " . substr($email, 0, 5) . "***");
    }

    // ======================================================
    // Step 4: تشفير البيانات
    // ======================================================
    $step = 4;
    error_log("$logTag Step 4: Encrypting data...");
    
    if (!isset($encryptionHelper)) {
        throw new Exception("Encryption Helper class is missing.");
    }
    
    $phoneNumber_encrypted = $encryptionHelper->encryptData($phoneNumber);
    $firstName_encrypted   = $encryptionHelper->encryptData($firstName);
    $lastName_encrypted    = $encryptionHelper->encryptData($lastName);
    $email_encrypted       = $encryptionHelper->encryptData($email);
    $uniqueId = substr(md5($phoneNumber), 0, 20);
    $password_hashed       = password_hash($email . $uniqueId, PASSWORD_DEFAULT);
    $unknown_encrypted     = $encryptionHelper->encryptData("unknown yet");

    // ======================================================
    // Step 4.5: التحقق الفعلي من ملكية رقم الهاتف (🔥 Fix)
    // ======================================================
    // كانت هذه النقطة تسمح بإنشاء حساب راكب بأي رقم هاتف بدون إثبات
    // ملكيته فعلياً — auth/otp/verify.php يُعلّم الصف verified=1 لكن
    // register_passenger.php لم يكن يتحقق من ذلك إطلاقاً. الآن نشترط
    // وجود صف تحقق ناجح (verified=1) لنفس رقم الهاتف خلال آخر 30 دقيقة
    // (مهلة أوسع من صلاحية الرمز نفسه [5 دقائق] لإعطاء وقت كافٍ لإكمال
    // نموذج التسجيل بعد التحقق مباشرة).
    $step = 4.5;
    $verifyCheckStmt = $con->prepare(
        "SELECT id FROM phone_verification_passenger
         WHERE phone_number = ? AND verified = 1 AND created_at > DATE_SUB(NOW(), INTERVAL 30 MINUTE)
         LIMIT 1"
    );
    $verifyCheckStmt->execute([$phoneNumber_encrypted]);
    if ($verifyCheckStmt->rowCount() === 0) {
        error_log("$logTag Step 4.5 Error: Phone number not verified via OTP.");
        jsonError("Phone number must be verified before registration.");
        exit();
    }

    // ======================================================
    // Step 5: إنشاء ID فريد
    // ======================================================
    $step = 5;
   // $uniqueId = substr(md5(uniqid(mt_rand(), true)), 0, 20);
    
    // $uniqueId is now generated earlier

    error_log("$logTag Step 5: Generated Unique ID: $uniqueId");

    // ======================================================
    // Step 6: التحقق من وجود المستخدم (Database Check)
    // ======================================================
    $step = 6;
    // كشف التكرار عبر الفهرس الأعمى + المقارنة القديمة: بدون الفهرس يفشل
    // الكشف بعد الانتقال إلى GCM فيُسمح بتسجيل نفس الرقم مرتين.
    global $blindIndex;
    $phoneBidx = $blindIndex ? $blindIndex->index('passengers.phone', $phoneNumber) : null;
    $emailBidx = $blindIndex ? $blindIndex->index('passengers.email', $email) : null;
    $nameBidx  = $blindIndex ? $blindIndex->index('passengers.name', trim("$firstName $lastName")) : null;

    $checkStmt = $con->prepare(
        "SELECT id FROM passengers WHERE phone = ? OR (? IS NOT NULL AND phone_bidx = ?)"
    );
    $checkStmt->execute([$phoneNumber_encrypted, $phoneBidx, $phoneBidx]);
    
    if ($checkStmt->rowCount() > 0) {
        error_log("$logTag Step 6 Error: User already exists.");
        jsonError("User with this phone number or email already exists.");
        exit();
    }

    // ======================================================
    // Step 7: الإضافة (Insert User)
    // ======================================================
    $step = 7;
    error_log("$logTag Step 7: Inserting into passengers table...");

    $insertStmt = $con->prepare("
        INSERT INTO passengers (id, first_name, last_name, email, phone, password, gender, birthdate, site, sosPhone, education, employmentType, maritalStatus, status, created_at, updated_at, phone_bidx, email_bidx, name_bidx)
        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 'active', NOW(), NOW(), ?, ?, ?)
    ");
    $success = $insertStmt->execute([
        $uniqueId, 
        $firstName_encrypted, 
        $lastName_encrypted, 
        $email_encrypted, 
        $phoneNumber_encrypted, 
        $password_hashed, 
        $unknown_encrypted, 
        $unknown_encrypted, 
        $unknown_encrypted, 
        $unknown_encrypted, 
        $unknown_encrypted, 
        $unknown_encrypted, 
        $unknown_encrypted,
        // فهارس البحث: تُكتب مع السجل حتى يكون قابلاً للبحث فوراً
        $phoneBidx,
        $emailBidx,
        $nameBidx
    ]);

    if (!$success) {
        $errorInfo = $insertStmt->errorInfo();
        // طباعة تفاصيل خطأ الـ SQL في اللوج
        error_log("$logTag Step 7 Error: SQL Insert Failed. Details: " . json_encode($errorInfo));
        jsonError("Failed to create user account.");
        exit();
    }

    
    // ======================================================
    // Step 9: جلب البيانات لإعادتها
    // ======================================================
    $step = 9;
    $userStmt = $con->prepare("SELECT * FROM passengers WHERE id = ?");
    $userStmt->execute([$uniqueId]);
    $newUser = $userStmt->fetch(PDO::FETCH_ASSOC);
    
    // ======================================================
    // Step 10: فك التشفير وإرسال الرد
    // ======================================================
    $step = 10;
    if ($newUser) {
        unset($newUser['password']);
        foreach ($newUser as $key => &$value) {
            if ($key !== 'id' && $key !== 'status' && $key !== 'created_at' && $key !== 'updated_at' && !is_null($value)) {
                $value = $encryptionHelper->decryptData($value);
            }
        }
    }

    error_log("$logTag Success: User registered successfully.");
    jsonSuccess(["status" => "registration_success", "data" => $newUser]);

} catch (PDOException $e) {
    // طباعة خطأ قاعدة البيانات في اللوج
    error_log("$logTag PDO Exception at Step $step: " . $e->getMessage());
    jsonError("Database Error.");
} catch (Exception $e) {
    // طباعة الأخطاء العامة في اللوج
    error_log("$logTag General Exception at Step $step: " . $e->getMessage());
    jsonError("General Error.");
}
?>