<?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 أنواع المصروفات
$expense_types = [];
try {
    $expense_types = $conn->query("SELECT id, name FROM expense_types ORDER BY name ASC")->fetchAll(PDO::FETCH_ASSOC);
} catch (PDOException $e) {
    error_log("Error fetching expense types: " . $e->getMessage());
    $expense_types = [];
}

// 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];
}

// معالجة إضافة مصروف
$success_message = '';
$error_message = '';

if ($_SERVER["REQUEST_METHOD"] == "POST" && isset($_POST['add_expense'])) {
    $expense_type_id = $_POST['expense_type_id'] ?? 0;
    $treasury_id = $_POST['treasury_id'] ?? 0;
    $amount = floatval($_POST['amount'] ?? 0);
    $notes = trim($_POST['notes'] ?? '');
    $date = $_POST['date'] ?? date('Y-m-d H:i:s');

    if ($expense_type_id <= 0 || $treasury_id <= 0 || $amount <= 0) {
        $error_message = "جميع الحقول مطلوبة ويجب أن تكون المبلغ موجبًا!";
    } else {
        try {
            $conn->beginTransaction();

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

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

            // إدخال المصروف
            $stmt = $conn->prepare("INSERT INTO expenses (expense_type_id, treasury_id, amount, notes, date, user_id) VALUES (:expense_type_id, :treasury_id, :amount, :notes, :date, :user_id)");
            $stmt->execute([
                ':expense_type_id' => $expense_type_id,
                ':treasury_id' => $treasury_id,
                ':amount' => $amount,
                ':notes' => $notes,
                ':date' => $date,
                ':user_id' => $user_id
            ]);

            // خصم المبلغ من الخزنة
            $stmt = $conn->prepare("UPDATE treasuries SET current_balance = current_balance - :amount WHERE id = :treasury_id");
            $stmt->execute([':amount' => $amount, ':treasury_id' => $treasury_id]);

            // تسجيل المعاملة في treasury_transactions
            $stmt = $conn->prepare("SELECT name FROM expense_types WHERE id = :expense_type_id");
            $stmt->execute([':expense_type_id' => $expense_type_id]);
            $expense_type_name = $stmt->fetchColumn() ?: 'غير محدد';

            $description = "مصروف ($expense_type_name) بقيمة $amount ج.م - $notes";
            $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' => $treasury_id,
                ':transaction_type' => 'withdrawal', // تم تعديل القيمة إلى 'withdrawal'
                ':amount' => $amount,
                ':description' => $description,
                ':date' => $date
            ]);

            $conn->commit();
            $success_message = "تم تسجيل المصروف بنجاح!";
        } catch (Exception $e) {
            $conn->rollBack();
            error_log("Error adding expense: " . $e->getMessage());
            $error_message = "فشل تسجيل المصروف: " . $e->getMessage();
        }
    }
}

// جلب المصروفات بناءً على البحث بين تاريخين
$expenses = [];
$start_date = isset($_GET['start_date']) ? $_GET['start_date'] . ' 00:00:00' : date('Y-m-d 00:00:00', strtotime('-30 days'));
$end_date = isset($_GET['end_date']) ? $_GET['end_date'] . ' 23:59:59' : date('Y-m-d 23:59:59');

try {
    $stmt = $conn->prepare("SELECT e.*, et.name AS expense_type_name, t.name AS treasury_name, u.username 
                           FROM expenses e 
                           LEFT JOIN expense_types et ON e.expense_type_id = et.id 
                           LEFT JOIN treasuries t ON e.treasury_id = t.id 
                           LEFT JOIN users u ON e.user_id = u.id 
                           WHERE e.date BETWEEN :start_date AND :end_date 
                           ORDER BY e.date DESC");
    $stmt->execute([':start_date' => $start_date, ':end_date' => $end_date]);
    $expenses = $stmt->fetchAll(PDO::FETCH_ASSOC);
} catch (PDOException $e) {
    error_log("Error fetching expenses: " . $e->getMessage());
    $expenses = [];
}
?>

<!DOCTYPE html>
<html lang="ar">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Astra - المصروفات</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-add {
            background: linear-gradient(45deg, #2ECC71, #27AE60);
            border: none;
            color: #fff;
        }

        .btn-add:hover {
            background: linear-gradient(45deg, #27AE60, #219653);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(46, 204, 113, 0.5);
        }

        .btn-cancel {
            background: linear-gradient(45deg, #9B59B6, #8E44AD);
            border: none;
            color: #fff;
        }

        .btn-cancel:hover {
            background: linear-gradient(45deg, #8E44AD, #7D3C98);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(155, 89, 182, 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;
        }

        .table {
            background: #fff;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            width: 100%;
        }

        .table thead {
            background: #2ECC71;
            color: #fff;
        }

        .table tbody tr:hover {
            background: rgba(46, 204, 113, 0.1);
        }
    </style>
</head>
<body>
    <div class="container-fluid">
        <div class="card">
            <h2><i class="fas fa-money-bill-wave me-2"></i> المصروفات</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; ?>

            <!-- نموذج إضافة مصروف -->
            <form method="POST" class="mb-4">
                <div class="row g-3">
                    <div class="col-md-3">
                        <label class="form-label"><i class="fas fa-tag"></i> بند الصرف</label>
                        <select class="form-select" name="expense_type_id" required>
                            <option value="">اختر بند الصرف</option>
                            <?php foreach ($expense_types as $type): ?>
                                <option value="<?php echo $type['id']; ?>"><?php echo htmlspecialchars($type['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-3">
                        <label class="form-label"><i class="fas fa-vault"></i> الخزنة</label>
                        <select class="form-select" name="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-sticky-note"></i> ملاحظات</label>
                        <input type="text" class="form-control" name="notes" placeholder="أدخل ملاحظات (اختياري)">
                    </div>
                    <div class="col-md-1">
                        <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">
                        <button type="submit" class="btn btn-add" name="add_expense"><i class="fas fa-save"></i> حفظ</button>
                    </div>
                    <div class="col-md-2">
                        <button type="button" class="btn btn-cancel" onclick="window.location.href='dashboard.php'"><i class="fas fa-times"></i> إلغاء</button>
                    </div>
                </div>
            </form>

            <!-- نموذج البحث -->
            <form method="GET" class="mb-4">
                <div class="row g-3">
                    <div class="col-md-3">
                        <label class="form-label"><i class="fas fa-calendar"></i> من تاريخ</label>
                        <input type="date" class="form-control" name="start_date" value="<?php echo isset($_GET['start_date']) ? $_GET['start_date'] : date('Y-m-d', strtotime('-30 days')); ?>">
                    </div>
                    <div class="col-md-3">
                        <label class="form-label"><i class="fas fa-calendar"></i> إلى تاريخ</label>
                        <input type="date" class="form-control" name="end_date" value="<?php echo isset($_GET['end_date']) ? $_GET['end_date'] : date('Y-m-d'); ?>">
                    </div>
                    <div class="col-md-2">
                        <button type="submit" class="btn btn-add"><i class="fas fa-search"></i> بحث</button>
                    </div>
                </div>
            </form>

            <!-- جدول العرض -->
            <div class="table-responsive" style="max-height: 50vh; overflow-y: auto;">
                <table class="table table-striped">
                    <thead>
                        <tr>
                            <th>رقم</th>
                            <th>بند الصرف</th>
                            <th>الخزنة</th>
                            <th>المبلغ</th>
                            <th>ملاحظات</th>
                            <th>التاريخ</th>
                            <th>المستخدم</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php if (!empty($expenses)): ?>
                            <?php foreach ($expenses as $index => $expense): ?>
                                <tr>
                                    <td><?php echo $index + 1; ?></td>
                                    <td><?php echo htmlspecialchars($expense['expense_type_name']); ?></td>
                                    <td><?php echo htmlspecialchars($expense['treasury_name']); ?></td>
                                    <td><?php echo number_format($expense['amount'], 2); ?> ج.م</td>
                                    <td><?php echo htmlspecialchars($expense['notes'] ?? 'لا يوجد'); ?></td>
                                    <td><?php echo date('Y-m-d H:i', strtotime($expense['date'])); ?></td>
                                    <td><?php echo htmlspecialchars($expense['username'] ?? 'غير محدد'); ?></td>
                                </tr>
                            <?php endforeach; ?>
                        <?php else: ?>
                            <tr><td colspan="7" style="text-align: center; color: #E74C3C;">لا توجد مصروفات في هذه الفترة.</td></tr>
                        <?php endif; ?>
                    </tbody>
                </table>
            </div>
        </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.querySelector('form[method="POST"]');
            const treasurySelect = document.querySelector('select[name="treasury_id"]');
            const amountInput = document.querySelector('input[name="amount"]');

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

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