<?php
// ============================================================
// api/payments/initiate_prime.php
// PURPOSE : شراء اشتراك Siro Prime عبر خصم رصيد المحفظة الداخلية
// AUTH    : JWT (passenger)
// FLOW    : 
//   1. جلب هوية الراكب من JWT
//   2. تحديد السعر حسب الدولة
//   3. التحقق من رصيد الراكب في سيرفر المحفظة (S2S)
//   4. إذا الرصيد كافٍ → الخصم + تفعيل Prime
//   5. إذا الرصيد غير كافٍ → رسالة لإرشاد المستخدم للشحن
// ============================================================

require_once __DIR__ . '/../../connect.php';

// ── 1. هوية الراكب من JWT ─────────────────────────────────────
$passengerId = $user_id ?? null;
if (!$passengerId || $role !== 'passenger') {
    jsonError("Unauthorized");
    exit;
}

// ── 2. الدولة والسعر ──────────────────────────────────────────
$country = filterRequest("country") ?: 'Jordan';

$pricingMap = [
    'Jordan' => ['amount' => 3.00,  'currency' => 'JOD'],  // ~4 USD/month
    'Egypt'  => ['amount' => 200.00,'currency' => 'EGP'],  // ~4 USD/month
    'Syria'  => ['amount' => 500.00,'currency' => 'SYP'],  // ~4 USD/month (New Syrian Pound)
];

$amount   = $pricingMap[$country]['amount']   ?? 3.00;
$currency = $pricingMap[$country]['currency'] ?? 'JOD';

// ── 3. سيرفر المحفظة حسب الدولة ──────────────────────────────
$walletServer = "https://walletintaleq.intaleq.xyz"; // Default
if (strtolower($country) === 'jordan') {
    $walletServer = getenv('WALLET_SERVER_JORDAN') ?: "https://walletintaleq.intaleq.xyz";
} elseif (strtolower($country) === 'egypt') {
    $walletServer = getenv('WALLET_SERVER_EGYPT') ?: "https://wallet-egypt.siromove.com";
} elseif (strtolower($country) === 'syria') {
    $walletServer = getenv('WALLET_SERVER_SYRIA') ?: "https://wallet-syria.siromove.com";
}

$s2sKey = getenv('S2S_SHARED_KEY');
if (empty($s2sKey)) {
    error_log("[Prime] CRITICAL: S2S_SHARED_KEY not set");
    jsonError("Server configuration error");
    exit;
}

// ── 4. التحقق من رصيد الراكب في سيرفر المحفظة ────────────────
$balanceUrl = "$walletServer/v2/main/ride/passengerWallet/getWalletByPassenger.php";

$chBalance = curl_init($balanceUrl);
curl_setopt_array($chBalance, [
    CURLOPT_POST           => true,
    CURLOPT_POSTFIELDS     => http_build_query(['passenger_id' => $passengerId]),
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_TIMEOUT        => 10,
    CURLOPT_HTTPHEADER     => [
        'Content-Type: application/x-www-form-urlencoded',
        'X-S2S-Api-Key: ' . $s2sKey
    ]
]);

$balanceRaw  = curl_exec($chBalance);
$balanceCode = curl_getinfo($chBalance, CURLINFO_HTTP_CODE);
$balanceErr  = curl_error($chBalance);
curl_close($chBalance);

if ($balanceErr || $balanceCode !== 200) {
    error_log("[Prime] Wallet balance fetch failed: HTTP $balanceCode | err: $balanceErr");
    jsonError("Unable to verify wallet balance. Please try again.");
    exit;
}

$balanceData = json_decode($balanceRaw, true);
$walletBalance = (float)($balanceData['message'][0]['total'] ?? $balanceData['total'] ?? -1);

if ($walletBalance < 0) {
    error_log("[Prime] Unexpected wallet response: $balanceRaw");
    jsonError("Unable to read wallet balance.");
    exit;
}

// ── 5. هل الرصيد كافٍ؟ ────────────────────────────────────────
if ($walletBalance < $amount) {
    // رصيد غير كافٍ — أخبر التطبيق ليوجّه المستخدم للشحن
    echo json_encode([
        'status'          => 'insufficient_balance',
        'current_balance' => $walletBalance,
        'required_amount' => $amount,
        'currency'        => $currency,
        'message'         => 'Your wallet balance is insufficient. Please top up your wallet to subscribe to Siro Prime.'
    ]);
    exit;
}

// ── 6. الرصيد كافٍ → بدء عملية الاشتراك ─────────────────────
try {
    $con->beginTransaction();

    // 6a. تسجيل الحركة في قاعدة بيانات سيرو (بادئها paid مباشرةً)
    $transactionRef = "PRIME-" . time() . "-" . rand(1000, 9999);
    $stmtTx = $con->prepare("
        INSERT INTO prime_payment_transactions (transaction_ref, passenger_id, amount, currency, status) 
        VALUES (:ref, :pid, :amt, :curr, 'paid')
    ");
    $stmtTx->execute([
        ':ref'  => $transactionRef,
        ':pid'  => $passengerId,
        ':amt'  => $amount,
        ':curr' => $currency
    ]);

    // 6b. تفعيل أو تجديد اشتراك Prime (30 يوماً)
    $expireAt = date('Y-m-d H:i:s', strtotime('+30 days'));
    $stmtPrime = $con->prepare("
        INSERT INTO passenger_prime_subscriptions (passenger_id, is_prime, expire_at)
        VALUES (:pid, 1, :exp)
        ON DUPLICATE KEY UPDATE is_prime = 1, expire_at = :exp2, updated_at = NOW()
    ");
    $stmtPrime->execute([
        ':pid'  => $passengerId,
        ':exp'  => $expireAt,
        ':exp2' => $expireAt
    ]);

    // 6c. خصم المبلغ من المحفظة عبر S2S (نفس نمط tips/add.php)
    $deductUrl = "$walletServer/v2/main/ride/payment/add.php";
    $deductData = [
        "user_id"       => $passengerId,
        "user_type"     => "passenger",
        "amount"        => -1 * $amount, // سالب = خصم
        "action"        => "subtract",
        "paymentID"     => $transactionRef,
        "paymentMethod" => "prime-subscription",
        "reason"        => "Siro Prime Subscription - 1 Month"
    ];

    $chDeduct = curl_init($deductUrl);
    curl_setopt_array($chDeduct, [
        CURLOPT_POST           => true,
        CURLOPT_POSTFIELDS     => http_build_query($deductData),
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_TIMEOUT        => 15,
        CURLOPT_HTTPHEADER     => [
            'Content-Type: application/x-www-form-urlencoded',
            'X-S2S-Api-Key: ' . $s2sKey
        ]
    ]);

    $deductRaw  = curl_exec($chDeduct);
    $deductCode = curl_getinfo($chDeduct, CURLINFO_HTTP_CODE);
    $deductErr  = curl_error($chDeduct);
    curl_close($chDeduct);

    $deductRes = json_decode($deductRaw, true);

    if ($deductErr || $deductCode !== 200 || ($deductRes['status'] ?? '') !== 'success') {
        // فشل الخصم → نرجع الكل
        $con->rollBack();
        error_log("[Prime] Wallet deduct FAILED: HTTP $deductCode | err: $deductErr | response: $deductRaw");
        jsonError("Failed to deduct wallet balance. Please try again.");
        exit;
    }

    $con->commit();

    // 6d. تحديث Redis فوراً (التفعيل اللحظي بدون إعادة طلب من DB)
    if (isset($redis) && $redis !== null) {
        try {
            $primeKey = "prime:passenger:{$passengerId}";
            $redis->setex($primeKey, 3600, json_encode([
                'is_prime'  => 1,
                'expire_at' => $expireAt
            ]));
        } catch (Exception $e) {
            // Redis failure is non-critical — DB is source of truth
            error_log("[Prime] Redis update failed (non-critical): " . $e->getMessage());
        }
    }

    // ── 7. ردّ النجاح للفلاتر ───────────────────────────────────
    jsonSuccess([
        'is_prime'        => true,
        'expire_at'       => $expireAt,
        'transaction_ref' => $transactionRef,
        'amount_deducted' => $amount,
        'currency'        => $currency,
    ], "Welcome to Siro Prime! 👑");

} catch (PDOException $e) {
    if ($con->inTransaction()) {
        $con->rollBack();
    }
    error_log("[Prime] DB Error: " . $e->getMessage());
    jsonError("Database error. Please try again.");
}
?>