<?php
session_start();

// التحقق من تسجيل الدخول
if (!isset($_SESSION['user_id'])) {
    header("Location: index.php");
    exit();
}

require_once 'db_connect.php';

// جلب بيانات المستخدم الحالي
$user_id = $_SESSION['user_id'];
$user_name = $_SESSION['user_name'] ?? '';
if (empty($user_name)) {
    try {
        $stmt = $conn->prepare("SELECT username FROM users WHERE id = :user_id");
        $stmt->execute([':user_id' => $user_id]);
        $user = $stmt->fetch(PDO::FETCH_ASSOC) ?: [];
        if (!empty($user) && isset($user['username'])) {
            $user_name = $user['username'];
            $_SESSION['user_name'] = $user_name;
        }
    } catch (PDOException $e) {
        error_log("Error fetching user name: " . $e->getMessage());
        $user_name = 'مستخدم غير محدد';
    }
}

// جلب الخزنات
$treasuries = [];
try {
    $treasuries = $conn->query("SELECT id, name, current_balance FROM treasuries")->fetchAll(PDO::FETCH_ASSOC);
} catch (PDOException $e) {
    error_log("Error fetching treasuries: " . $e->getMessage());
    $treasuries[] = ['id' => 1, 'name' => 'الخزنة الافتراضية', 'current_balance' => 0];
}

$success_message = '';
$error_message = '';

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $from_treasury_id = $_POST['from_treasury_id'] ?? 0;
    $to_treasury_id = $_POST['to_treasury_id'] ?? 0;
    $amount = floatval($_POST['amount'] ?? 0);
    $reason = trim($_POST['reason'] ?? '');
    $date = $_POST['date'] ?? date('Y-m-d H:i:s');

    // التحقق من صحة البيانات
    if ($from_treasury_id == $to_treasury_id) {
        $error_message = "لا يمكن تحويل المبلغ إلى نفس الخزنة!";
    } elseif ($amount <= 0) {
        $error_message = "المبلغ يجب أن يكون أكبر من صفر!";
    } else {
        try {
            $conn->beginTransaction();

            // التحقق من رصيد الخزنة المصدر
            $stmt = $conn->prepare("SELECT current_balance FROM treasuries WHERE id = :from_treasury_id");
            $stmt->execute([':from_treasury_id' => $from_treasury_id]);
            $from_balance = $stmt->fetchColumn();

            if ($from_balance === false || $from_balance < $amount) {
                throw new Exception("رصيد الخزنة المصدر غير كافٍ أو غير موجود!");
            }

            // تحديث رصيد الخزنة المصدر (سحب)
            $stmt = $conn->prepare("UPDATE treasuries SET current_balance = current_balance - :amount WHERE id = :from_treasury_id");
            $stmt->execute([':amount' => $amount, ':from_treasury_id' => $from_treasury_id]);

            // تحديث رصيد الخزنة الوجهة (إضافة)
            $stmt = $conn->prepare("UPDATE treasuries SET current_balance = current_balance + :amount WHERE id = :to_treasury_id");
            $stmt->execute([':amount' => $amount, ':to_treasury_id' => $to_treasury_id]);

            // تسجيل عملية التحويل في treasury_transfers
            $stmt = $conn->prepare("INSERT INTO treasury_transfers (from_treasury_id, to_treasury_id, amount, date, reason, user_id) VALUES (:from_treasury_id, :to_treasury_id, :amount, :date, :reason, :user_id)");
            $stmt->execute([
                ':from_treasury_id' => $from_treasury_id,
                ':to_treasury_id' => $to_treasury_id,
                ':amount' => $amount,
                ':date' => $date,
                ':reason' => $reason,
                ':user_id' => $user_id
            ]);

            // تسجيل المعاملات في treasury_transactions
            $description = "تحويل مبلغ $amount ج.م من خزنة #$from_treasury_id إلى خزنة #$to_treasury_id - $reason";
            $stmt = $conn->prepare("INSERT INTO treasury_transactions (treasury_id, transaction_type, amount, description, date) VALUES (:treasury_id, :transaction_type, :amount, :description, :date)");
            $stmt->execute([
                ':treasury_id' => $from_treasury_id,
                ':transaction_type' => 'withdrawal',
                ':amount' => $amount,
                ':description' => $description,
                ':date' => $date
            ]);

            $stmt = $conn->prepare("INSERT INTO treasury_transactions (treasury_id, transaction_type, amount, description, date) VALUES (:treasury_id, :transaction_type, :amount, :description, :date)");
            $stmt->execute([
                ':treasury_id' => $to_treasury_id,
                ':transaction_type' => 'deposit',
                ':amount' => $amount,
                ':description' => $description,
                ':date' => $date
            ]);

            $conn->commit();
            $success_message = "تم تحويل المبلغ بنجاح!";
        } catch (Exception $e) {
            $conn->rollBack();
            error_log("Error during treasury transfer: " . $e->getMessage());
            $error_message = "فشل التحويل: " . $e->getMessage();
        }
    }
}
?>

<!DOCTYPE html>
<html lang="ar">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Astra - تحويل الخزنة</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css">
    <style>
        body {
            margin: 0;
            padding: 0;
            min-height: 100vh;
            direction: rtl;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #2ECC71, #3498DB, #E74C3C);
            overflow-x: hidden;
            animation: gradientShift 10s ease infinite;
            background-size: 400% 400%;
        }

        @keyframes gradientShift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .container-fluid {
            padding: 20px;
            height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .card {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            padding: 20px;
            margin-bottom: 20px;
            animation: fadeIn 1s ease-in-out;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        h2 {
            color: #2ECC71;
            font-weight: bold;
            text-align: center;
            margin-bottom: 20px;
            text-shadow: 0 0 5px rgba(46, 204, 113, 0.5);
        }

        .form-label {
            color: #3498DB;
            font-weight: bold;
            margin-bottom: 5px;
            display: flex;
            align-items: center;
            font-size: 0.9rem;
        }

        .form-label i {
            margin-left: 8px;
            color: #2ECC71;
        }

        .form-control, .form-select {
            border-radius: 10px;
            border: 2px solid #2ECC71;
            padding: 6px 10px;
            background: rgba(255, 255, 255, 0.8);
            transition: all 0.3s ease;
            box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.1);
            font-size: 0.9rem;
        }

        .form-control:focus, .form-select:focus {
            border-color: #3498DB;
            box-shadow: 0 0 10px rgba(52, 152, 219, 0.5), inset 0 2px 5px rgba(0, 0, 0, 0.1);
            background: #fff;
        }

        .btn {
            border-radius: 10px;
            padding: 6px 15px;
            font-weight: bold;
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
            font-size: 0.9rem;
        }

        .btn-transfer {
            background: linear-gradient(45deg, #3498DB, #2980B9);
            border: none;
            color: #fff;
        }

        .btn-transfer:hover {
            background: linear-gradient(45deg, #2980B9, #2471A3);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(52, 152, 219, 0.5);
        }

        .btn-cancel {
            background: linear-gradient(45deg, #E74C3C, #C0392B);
            border: none;
            color: #fff;
        }

        .btn-cancel:hover {
            background: linear-gradient(45deg, #C0392B, #A93226);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(231, 76, 60, 0.5);
        }

        .success-message {
            color: #2ECC71;
            font-weight: bold;
            text-align: center;
            margin-bottom: 20px;
            animation: fadeIn 0.5s ease-in-out;
        }

        .error-message {
            color: #E74C3C;
            font-weight: bold;
            text-align: center;
            margin-bottom: 20px;
            animation: fadeIn 0.5s ease-in-out;
        }
    </style>
</head>
<body>
    <div class="container-fluid">
        <div class="card">
            <h2><i class="fas fa-exchange-alt me-2"></i> تحويل الخزنة</h2>
            <?php if ($success_message): ?>
                <div class="success-message"><?php echo $success_message; ?></div>
            <?php endif; ?>
            <?php if ($error_message): ?>
                <div class="error-message"><?php echo $error_message; ?></div>
            <?php endif; ?>
            <form method="POST" id="transferForm">
                <div class="row g-3">
                    <div class="col-md-3">
                        <label class="form-label"><i class="fas fa-vault"></i> الخزنة المصدر</label>
                        <select class="form-select" name="from_treasury_id" required>
                            <?php foreach ($treasuries as $treasury): ?>
                                <option value="<?php echo $treasury['id']; ?>" data-balance="<?php echo $treasury['current_balance']; ?>">
                                    <?php echo htmlspecialchars($treasury['name']) . " (رصيد: " . number_format($treasury['current_balance'], 2) . " ج.م)"; ?>
                                </option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                    <div class="col-md-3">
                        <label class="form-label"><i class="fas fa-vault"></i> الخزنة الوجهة</label>
                        <select class="form-select" name="to_treasury_id" required>
                            <?php foreach ($treasuries as $treasury): ?>
                                <option value="<?php echo $treasury['id']; ?>">
                                    <?php echo htmlspecialchars($treasury['name']); ?>
                                </option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                    <div class="col-md-2">
                        <label class="form-label"><i class="fas fa-money-bill"></i> المبلغ</label>
                        <input type="number" step="0.01" class="form-control" name="amount" placeholder="أدخل المبلغ" required>
                    </div>
                    <div class="col-md-2">
                        <label class="form-label"><i class="fas fa-calendar-alt"></i> التاريخ</label>
                        <input type="datetime-local" class="form-control" name="date" value="<?php echo date('Y-m-d\TH:i'); ?>" required>
                    </div>
                    <div class="col-md-2">
                        <label class="form-label"><i class="fas fa-user"></i> المستخدم</label>
                        <input type="text" class="form-control" value="<?php echo htmlspecialchars($user_name); ?>" readonly>
                    </div>
                    <div class="col-md-6">
                        <label class="form-label"><i class="fas fa-comment"></i> السبب</label>
                        <input type="text" class="form-control" name="reason" placeholder="أدخل سبب التحويل" required>
                    </div>
                    <div class="col-md-3">
                        <button type="submit" class="btn btn-transfer" name="transfer"><i class="fas fa-exchange-alt"></i> تنفيذ التحويل</button>
                    </div>
                    <div class="col-md-3">
                        <button type="button" class="btn btn-cancel" onclick="window.location.href='dashboard.php'"><i class="fas fa-times"></i> إلغاء</button>
                    </div>
                </div>
            </form>
        </div>
    </div>

    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
    <script>
        document.addEventListener('DOMContentLoaded', () => {
            const form = document.getElementById('transferForm');
            const fromTreasurySelect = document.querySelector('select[name="from_treasury_id"]');
            const amountInput = document.querySelector('input[name="amount"]');

            form.addEventListener('submit', function(e) {
                const fromBalance = parseFloat(fromTreasurySelect.options[fromTreasurySelect.selectedIndex].getAttribute('data-balance'));
                const amount = parseFloat(amountInput.value) || 0;

                if (amount > fromBalance) {
                    e.preventDefault();
                    alert('المبلغ المطلوب أكبر من رصيد الخزنة المصدر!');
                }
            });
        });
    </script>
</body>
</html>