<?php
// Enable error reporting for debugging
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

// Start session at the beginning (added to avoid any issues with session usage)
session_start();

// Include database and functions
require_once '../includes/db.php';
require_once '../includes/functions.php';

// Ensure only admins can access the page
redirectIfNotAdmin();

// Get system statistics
$totalUsers = $pdo->query("SELECT COUNT(*) FROM users")->fetchColumn();
$totalAccounts = $pdo->query("SELECT COUNT(*) FROM accounts")->fetchColumn();
$totalBalance = $pdo->query("SELECT SUM(balance) FROM accounts")->fetchColumn();
$totalBalance = $totalBalance ?: 0;
$pendingLoans = $pdo->query("SELECT COUNT(*) FROM loans WHERE status = 'pending'")->fetchColumn();

// Get recent users
$recentUsers = $pdo->query("SELECT * FROM users ORDER BY created_at DESC LIMIT 5")->fetchAll();

// Get additional stats for better overview
$totalTransactions = $pdo->query("SELECT COUNT(*) FROM transactions")->fetchColumn();
$approvedLoans = $pdo->query("SELECT COUNT(*) FROM loans WHERE status = 'approved'")->fetchColumn();
$totalInvestments = $pdo->query("SELECT COUNT(*) FROM investments")->fetchColumn();

// Get current admin info
$adminId = $_SESSION['user_id'];
$adminInfo = $pdo->prepare("SELECT full_name, email FROM users WHERE user_id = ?");
$adminInfo->execute([$adminId]);
$admin = $adminInfo->fetch();

// FIXED: Use created_at instead of transaction_date
$recentTransactions = $pdo->query("
    SELECT t.*, a.account_number 
    FROM transactions t 
    LEFT JOIN accounts a ON t.account_id = a.account_id 
    ORDER BY t.created_at DESC 
    LIMIT 5
")->fetchAll();
?>

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Oakshire Finance - Admin Dashboard</title>
    <link
        href="https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300;14..32,400;14..32,500;14..32,600;14..32,700;14..32,800&display=swap"
        rel="stylesheet">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-navy: #0a2540;
            --primary-dark: #0a1c2f;
            --primary-blue: #1a4d8c;
            --accent-blue: #2c7da0;
            --success-green: #2e7d32;
            --warning-orange: #f39c12;
            --error-red: #dc3545;
            --info-blue: #17a2b8;
            --gray-50: #f8f9fc;
            --gray-100: #f1f3f9;
            --gray-200: #e9ecef;
            --gray-300: #dee2e6;
            --gray-400: #ced4da;
            --gray-500: #adb5bd;
            --gray-600: #6c757d;
            --gray-700: #495057;
            --gray-800: #343a40;
            --gray-900: #212529;
            --white: #ffffff;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 12px 28px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
        }

        body {
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            background: var(--gray-50);
            color: var(--gray-800);
            line-height: 1.5;
            overflow-x: hidden;
        }

        /* Layout */
        .dashboard-wrapper {
            display: flex;
            min-height: 100vh;
        }

        /* Sidebar */
        .sidebar {
            width: 280px;
            background: var(--white);
            border-right: 1px solid var(--gray-200);
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            overflow-y: auto;
            transition: var(--transition);
            z-index: 100;
        }

        .sidebar-header {
            padding: 24px;
            border-bottom: 1px solid var(--gray-200);
            text-align: center;
        }

        .logo {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            text-decoration: none;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-navy);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-icon i {
            font-size: 20px;
            color: white;
        }

        .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary-navy);
            letter-spacing: -0.3px;
        }

        .nav-menu {
            padding: 24px 16px;
        }

        .nav-item {
            margin-bottom: 8px;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 12px;
            text-decoration: none;
            color: var(--gray-700);
            transition: var(--transition);
            font-weight: 500;
            font-size: 14px;
        }

        .nav-link i {
            width: 20px;
            font-size: 18px;
        }

        .nav-link:hover {
            background: var(--gray-100);
            color: var(--primary-blue);
        }

        .nav-link.active {
            background: var(--primary-navy);
            color: white;
        }

        .nav-link.active i {
            color: white;
        }

        .logout-section {
            padding: 24px 16px;
            border-top: 1px solid var(--gray-200);
            margin-top: auto;
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--white);
        }

        .logout-btn {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 12px;
            text-decoration: none;
            color: var(--error-red);
            transition: var(--transition);
            font-weight: 500;
        }

        .logout-btn:hover {
            background: rgba(220, 53, 69, 0.1);
        }

        /* Main Content */
        .main-content {
            flex: 1;
            margin-left: 280px;
            min-height: 100vh;
        }

        /* Top Header */
        .top-header {
            background: var(--white);
            border-bottom: 1px solid var(--gray-200);
            padding: 16px 32px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 99;
        }

        .page-title h1 {
            font-size: 24px;
            font-weight: 700;
            color: var(--gray-900);
        }

        .user-menu {
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .notification-btn {
            position: relative;
            background: none;
            border: none;
            font-size: 20px;
            color: var(--gray-600);
            cursor: pointer;
            transition: var(--transition);
        }

        .notification-btn:hover {
            color: var(--primary-blue);
        }

        .user-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .user-avatar {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary-navy), var(--primary-blue));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .user-avatar i {
            font-size: 18px;
            color: white;
        }

        .user-details h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--gray-900);
        }

        .user-details p {
            font-size: 12px;
            color: var(--gray-600);
        }

        /* Content Area */
        .content-area {
            padding: 32px;
        }

        /* Stats Grid */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
            margin-bottom: 40px;
        }

        .stat-card {
            background: var(--white);
            border-radius: 20px;
            padding: 24px;
            border: 1px solid var(--gray-200);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .stat-icon {
            width: 48px;
            height: 48px;
            background: rgba(26, 77, 140, 0.1);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }

        .stat-icon i {
            font-size: 24px;
            color: var(--primary-blue);
        }

        .stat-card h3 {
            font-size: 13px;
            font-weight: 500;
            color: var(--gray-600);
            margin-bottom: 8px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .stat-value {
            font-size: 32px;
            font-weight: 700;
            color: var(--gray-900);
            margin-bottom: 4px;
        }

        .stat-trend {
            font-size: 12px;
            color: var(--gray-500);
        }

        /* Section Headers */
        .section-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
        }

        .section-header h2 {
            font-size: 20px;
            font-weight: 600;
            color: var(--gray-900);
        }

        .view-all {
            color: var(--primary-blue);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
        }

        .view-all:hover {
            text-decoration: underline;
        }

        /* Tables */
        .table-container {
            background: var(--white);
            border-radius: 20px;
            border: 1px solid var(--gray-200);
            overflow-x: auto;
            margin-bottom: 32px;
        }

        .data-table {
            width: 100%;
            border-collapse: collapse;
        }

        .data-table th,
        .data-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--gray-200);
        }

        .data-table th {
            background: var(--gray-50);
            font-weight: 600;
            font-size: 13px;
            color: var(--gray-700);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .data-table td {
            font-size: 14px;
            color: var(--gray-800);
        }

        .data-table tr:hover td {
            background: var(--gray-50);
        }

        .empty-state {
            text-align: center;
            padding: 48px;
            color: var(--gray-500);
        }

        .empty-state i {
            font-size: 48px;
            margin-bottom: 16px;
            opacity: 0.5;
        }

        /* Badges */
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
        }

        .badge-success {
            background: rgba(46, 125, 50, 0.1);
            color: var(--success-green);
        }

        .badge-warning {
            background: rgba(243, 156, 18, 0.1);
            color: var(--warning-orange);
        }

        .badge-info {
            background: rgba(23, 162, 184, 0.1);
            color: var(--info-blue);
        }

        .badge-deposit {
            background: rgba(46, 125, 50, 0.1);
            color: var(--success-green);
        }

        .badge-withdrawal {
            background: rgba(220, 53, 69, 0.1);
            color: var(--error-red);
        }

        .badge-transfer {
            background: rgba(23, 162, 184, 0.1);
            color: var(--info-blue);
        }

        /* Hamburger Menu */
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--gray-700);
        }

        /* Mobile Responsive */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
                z-index: 1000;
            }

            .sidebar.mobile-open {
                transform: translateX(0);
            }

            .main-content {
                margin-left: 0;
            }

            .hamburger {
                display: block;
            }

            .stats-grid {
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .content-area {
                padding: 20px;
            }

            .top-header {
                padding: 12px 20px;
            }

            .page-title h1 {
                font-size: 20px;
            }

            .user-details {
                display: none;
            }

            .stats-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .data-table th,
            .data-table td {
                padding: 12px 16px;
            }
        }

        /* Loading Animation */
        @keyframes shimmer {
            0% {
                background-position: -1000px 0;
            }

            100% {
                background-position: 1000px 0;
            }
        }

        .loading {
            background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-300) 50%, var(--gray-200) 75%);
            background-size: 1000px 100%;
            animation: shimmer 2s infinite;
        }
    </style>
    <link rel="stylesheet" href="../assets/css/nexus-theme.css">
</head>

<body>
    <div class="dashboard-wrapper">
        <!-- Sidebar Navigation -->
        <aside class="sidebar" id="sidebar">
            <div class="sidebar-header">
                <a href="dashboard.php" class="logo">
                    <div class="logo-icon">
                        <i class="fas fa-building-columns"></i>
                    </div>
                    <span class="logo-text">Oakshire Finance</span>
                </a>
            </div>

            <nav class="nav-menu">
                <div class="nav-item">
                    <a href="dashboard.php" class="nav-link active">
                        <i class="fas fa-chart-line"></i>
                        <span>Dashboard</span>
                    </a>
                </div>
                <div class="nav-item">
                    <a href="manage-users.php" class="nav-link">
                        <i class="fas fa-users"></i>
                        <span>Manage Users</span>
                    </a>
                </div>


                <div class="nav-item"><a href="manage-balance.php" class="nav-link"><i class="fas fa-wallet"></i> Manage
                        Balance</a></div>
                <div class="nav-item">
                    <a href="manage-loans.php" class="nav-link">
                        <i class="fas fa-hand-holding-usd"></i>
                        <span>Manage Loans</span>
                    </a>
                </div>
                <div class="nav-item">
                    <a href="manage-investments.php" class="nav-link">
                        <i class="fas fa-chart-pie"></i>
                        <span>Manage Investments</span>
                    </a>
                </div>
                <div class="nav-item">
                    <a href="track-investments.php" class="nav-link">
                        <i class="fas fa-chart-simple"></i>
                        <span>Users Investments</span>
                    </a>
                </div>
                <div class="nav-item">
                    <a href="role.php" class="nav-link">
                        <i class="fas fa-user-tag"></i>
                        <span>Roles</span>
                    </a>
                </div>
                <div class="nav-item">
                    <a href="recent_transactions.php" class="nav-link">
                        <i class="fas fa-exchange-alt"></i>
                        <span>Transactions</span>
                    </a>
                </div>
                <div class="nav-item">
                    <a href="loan-history.php" class="nav-link">
                        <i class="fas fa-history"></i>
                        <span>Loan History</span>
                    </a>
                </div>
                <div class="nav-item">
                    <a href="login-records.php" class="nav-link">
                        <i class="fas fa-sign-in-alt"></i>
                        <span>Login Records</span>
                    </a>
                </div>
                <div class="nav-item">
                    <a href="manage-messages.php" class="nav-link">
                        <i class="fas fa-envelope"></i>
                        <span>Contact Messages</span>
                    </a>
                </div>
            </nav>

            <div class="logout-section">
                <a href="../logout.php" class="logout-btn">
                    <i class="fas fa-sign-out-alt"></i>
                    <span>Logout</span>
                </a>
            </div>
        </aside>

        <!-- Main Content -->
        <main class="main-content">
            <!-- Top Header -->
            <header class="top-header">
                <button class="hamburger" id="hamburger">
                    <i class="fas fa-bars"></i>
                </button>
                <div class="page-title">
                    <h1>Admin Dashboard</h1>
                </div>
                <div class="user-menu">
                    <button class="notification-btn">
                        <i class="fas fa-bell"></i>
                    </button>
                    <div class="user-info">
                        <div class="user-avatar">
                            <i class="fas fa-user-shield"></i>
                        </div>
                        <div class="user-details">
                            <h4><?= htmlspecialchars($admin['full_name'] ?? 'Admin User') ?></h4>
                            <p>System Administrator</p>
                        </div>
                    </div>
                </div>
            </header>

            <!-- Content Area -->
            <div class="content-area">
                <!-- Stats Cards -->
                <div class="stats-grid">
                    <div class="stat-card">
                        <div class="stat-icon">
                            <i class="fas fa-users"></i>
                        </div>
                        <h3>Total Users</h3>
                        <div class="stat-value"><?= number_format($totalUsers) ?></div>
                        <div class="stat-trend">Registered customers</div>
                    </div>

                    <div class="stat-card">
                        <div class="stat-icon">
                            <i class="fas fa-building-columns"></i>
                        </div>
                        <h3>Total Accounts</h3>
                        <div class="stat-value"><?= number_format($totalAccounts) ?></div>
                        <div class="stat-trend">Active bank accounts</div>
                    </div>

                    <div class="stat-card">
                        <div class="stat-icon">
                            <i class="fas fa-chart-line"></i>
                        </div>
                        <h3>Total Balance</h3>
                        <div class="stat-value">$<?= number_format($totalBalance, 2) ?></div>
                        <div class="stat-trend">Total assets under management</div>
                    </div>

                    <div class="stat-card">
                        <div class="stat-icon">
                            <i class="fas fa-clock"></i>
                        </div>
                        <h3>Pending Loans</h3>
                        <div class="stat-value"><?= number_format($pendingLoans) ?></div>
                        <div class="stat-trend">Awaiting approval</div>
                    </div>
                </div>

                <a href="pending-transactions.php" class="stat-card" style="text-decoration: none; color: inherit;">
                    <div class="stat-icon">
                        <i class="fas fa-clock"></i>
                    </div>
                    <h3>Pending Transcations</h3>
                    <div class="stat-value"><?= number_format($pendingLoans) ?></div>
                    <div class="stat-trend">Awaiting approval</div>
                </a>

                <!-- Additional Stats Row -->
                <div class="stats-grid" style="margin-bottom: 40px;">
                    <div class="stat-card">
                        <div class="stat-icon">
                            <i class="fas fa-exchange-alt"></i>
                        </div>
                        <h3>Total Transactions</h3>
                        <div class="stat-value"><?= number_format($totalTransactions ?? 0) ?></div>
                        <div class="stat-trend">All time transactions</div>
                    </div>

                    <div class="stat-card">
                        <div class="stat-icon">
                            <i class="fas fa-check-circle"></i>
                        </div>
                        <h3>Approved Loans</h3>
                        <div class="stat-value"><?= number_format($approvedLoans ?? 0) ?></div>
                        <div class="stat-trend">Successfully funded</div>
                    </div>

                    <div class="stat-card">
                        <div class="stat-icon">
                            <i class="fas fa-chart-pie"></i>
                        </div>
                        <h3>Active Investments</h3>
                        <div class="stat-value"><?= number_format($totalInvestments ?? 0) ?></div>
                        <div class="stat-trend">Current investment plans</div>
                    </div>
                </div>

                <!-- Recent Users Section -->
                <div class="section-header">
                    <h2>Recent Users</h2>
                    <a href="manage-users.php" class="view-all">View All <i class="fas fa-arrow-right"></i></a>
                </div>

                <div class="table-container">
                    <?php if (empty($recentUsers)): ?>
                        <div class="empty-state">
                            <i class="fas fa-users-slash"></i>
                            <p>No users found</p>
                        </div>
                    <?php else: ?>
                        <table class="data-table">
                            <thead>
                                <tr>
                                    <th>Name</th>
                                    <th>Email</th>
                                    <th>Phone</th>
                                    <th>Joined On</th>
                                    <th>Status</th>
                                </tr>
                            </thead>
                            <tbody>
                                <?php foreach ($recentUsers as $user): ?>
                                    <tr>
                                        <td><strong><?= htmlspecialchars($user['full_name']) ?></strong></td>
                                        <td><?= htmlspecialchars($user['email']) ?></td>
                                        <td><?= htmlspecialchars($user['phone'] ?? 'N/A') ?></td>
                                        <td><?= date('M j, Y', strtotime($user['created_at'])) ?></td>
                                        <td>
                                            <?php if ($user['status'] === 'approved'): ?>
                                                <span class="badge badge-success">Approved</span>
                                            <?php elseif ($user['status'] === 'pending'): ?>
                                                <span class="badge badge-warning">Pending</span>
                                            <?php else: ?>
                                                <span class="badge"><?= ucfirst($user['status']) ?></span>
                                            <?php endif; ?>
                                        </td>
                                    </tr>
                                <?php endforeach; ?>
                            </tbody>
                        </table>
                    <?php endif; ?>
                </div>

                <!-- Recent Transactions Section -->
                <?php if (!empty($recentTransactions)): ?>
                    <div class="section-header">
                        <h2>Recent Transactions</h2>
                        <a href="recent_transactions.php" class="view-all">View All <i class="fas fa-arrow-right"></i></a>
                    </div>

                    <div class="table-container">
                        <table class="data-table">
                            <thead>
                                <tr>
                                    <th>Transaction ID</th>
                                    <th>Type</th>
                                    <th>Amount</th>
                                    <th>Date</th>
                                    <th>Status</th>
                                </tr>
                            </thead>
                            <tbody>
                                <?php foreach ($recentTransactions as $transaction): ?>
                                    <tr>
                                        <td>#<?= $transaction['transaction_id'] ?></td>
                                        <td>
                                            <?php
                                            $typeClass = '';
                                            $typeLabel = ucfirst(str_replace('_', ' ', $transaction['type']));
                                            if (in_array($transaction['type'], ['deposit', 'investment', 'approved_loan'])) {
                                                $typeClass = 'badge-success';
                                            } elseif (in_array($transaction['type'], ['withdrawal', 'withdrawal_matured_investment'])) {
                                                $typeClass = 'badge-withdrawal';
                                            } else {
                                                $typeClass = 'badge-info';
                                            }
                                            ?>
                                            <span class="badge <?= $typeClass ?>"><?= $typeLabel ?></span>
                                        </td>
                                        <td>$<?= number_format($transaction['amount'], 2) ?></td>
                                        <td><?= date('M j, Y g:i A', strtotime($transaction['created_at'])) ?></td>
                                        <td><span class="badge badge-success">Completed</span></td>
                                    </tr>
                                <?php endforeach; ?>
                            </tbody>
                        </table>
                    </div>
                <?php endif; ?>
            </div>
        </main>
    </div>

    <script>
        // Mobile sidebar toggle
        const hamburger = document.getElementById('hamburger');
        const sidebar = document.getElementById('sidebar');

        if (hamburger) {
            hamburger.addEventListener('click', function () {
                sidebar.classList.toggle('mobile-open');
            });
        }

        // Close sidebar when clicking outside on mobile
        document.addEventListener('click', function (event) {
            if (window.innerWidth <= 1024) {
                const isClickInside = sidebar.contains(event.target) || hamburger.contains(event.target);
                if (!isClickInside && sidebar.classList.contains('mobile-open')) {
                    sidebar.classList.remove('mobile-open');
                }
            }
        });
    </script>
</body>

</html>