<?php
// ========================================
// FILE: php/db_tool.php
// Alat Manajemen & Perbaikan Database (Production Ready)
// ========================================

include 'koneksi.php';

// Timpa header dari koneksi.php agar browser merender HTML dengan benar
header('Content-Type: text/html; charset=utf-8');

// Ambil PIN keamanan dari environment variable, default ke "123456" jika belum diatur
$secure_pin = getenv('DB_TOOL_PIN') ?: "123456";

// Mulai session untuk authentikasi pin
if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

$authenticated = isset($_SESSION['db_tool_auth']) && $_SESSION['db_tool_auth'] === true;

// Proses Login PIN
if (isset($_POST['pin'])) {
    if ($_POST['pin'] === $secure_pin) {
        $_SESSION['db_tool_auth'] = true;
        $authenticated = true;
    } else {
        $login_error = "PIN yang Anda masukkan salah!";
    }
}

// Proses Logout
if (isset($_GET['logout'])) {
    $_SESSION['db_tool_auth'] = false;
    session_destroy();
    header("Location: db_tool.php");
    exit();
}

// Daftar tabel wajib
$required_tables = [
    'masyarakat_miskin',
    'rumah_ibadah',
    'bantuan_riwayat',
    'bpjs_record',
    'users',
    'fasilitas_jalan',
    'fasilitas_polygon',
    'fasilitas_spbu'
];

$logs = [];
$error_logs = [];

// Fungsi bantu eksekusi perintah SQL secara massal
function executeSQLFile($conn, $filepath, &$logs, &$error_logs) {
    if (!file_exists($filepath)) {
        $error_logs[] = "File SQL tidak ditemukan di: " . basename($filepath);
        return false;
    }
    
    $sql = file_get_contents($filepath);
    
    // Nonaktifkan foreign key checks sementara untuk menghindari error dependensi saat drop/create
    $conn->query("SET FOREIGN_KEY_CHECKS = 0;");
    
    if ($conn->multi_query($sql)) {
        do {
            if ($res = $conn->store_result()) {
                $res->free();
            }
        } while ($conn->more_results() && $conn->next_result());
        
        $conn->query("SET FOREIGN_KEY_CHECKS = 1;");
        $logs[] = "File SQL " . basename($filepath) . " berhasil diimpor sepenuhnya.";
        return true;
    } else {
        $conn->query("SET FOREIGN_KEY_CHECKS = 1;");
        $error_logs[] = "Gagal mengimpor SQL: " . $conn->error;
        return false;
    }
}

// Handler Aksi Perbaikan Database (Hanya berjalan jika terautentikasi)
$action_result = null;
if ($authenticated && isset($_POST['action'])) {
    $action = $_POST['action'];
    
    if ($action === 'check_connection') {
        if ($conn->ping()) {
            $logs[] = "Koneksi ke database server aktif! Server info: " . $conn->server_info;
        } else {
            $error_logs[] = "Koneksi database terputus: " . $conn->error;
        }
    }
    
    elseif ($action === 'fix_missing') {
        $logs[] = "Mulai memeriksa tabel yang hilang...";
        // Dapatkan DDL Cadangan
        $sql_file = __DIR__ . '/../database.sql';
        
        foreach ($required_tables as $table) {
            $check = $conn->query("SHOW TABLES LIKE '{$table}'");
            if ($check && $check->num_rows > 0) {
                $logs[] = "Tabel `{$table}` sudah ada (Lewati).";
            } else {
                $logs[] = "Tabel `{$table}` hilang! Mencoba membuat tabel...";
                // Kita coba jalankan inisialisasi tabel dari db_check fallback atau database.sql
                // Agar aman, buat manual tabel dasar
                $created = false;
                if (file_exists($sql_file)) {
                    // Jika file sql ada, kita impor untuk membuat yang kurang
                    // Supaya tidak meng-drop tabel lain, di database.sql harus menggunakan CREATE TABLE IF NOT EXISTS
                    executeSQLFile($conn, $sql_file, $logs, $error_logs);
                    $created = true;
                    break;
                }
            }
        }
        $logs[] = "Pemeriksaan tabel selesai.";
    }
    
    elseif ($action === 'optimize_repair') {
        $logs[] = "Mulai proses perbaikan & optimasi tabel...";
        foreach ($required_tables as $table) {
            $check = $conn->query("SHOW TABLES LIKE '{$table}'");
            if ($check && $check->num_rows > 0) {
                $conn->query("REPAIR TABLE `{$table}`");
                $conn->query("OPTIMIZE TABLE `{$table}`");
                $logs[] = "Tabel `{$table}` berhasil diperbaiki dan dioptimalkan.";
            } else {
                $error_logs[] = "Tabel `{$table}` tidak ditemukan untuk dioptimalkan.";
            }
        }
        $logs[] = "Proses optimasi selesai.";
    }
    
    elseif ($action === 'hard_reset') {
        $logs[] = "⚠️ Melakukan HARD RESET Database...";
        // Drop all known tables
        $conn->query("SET FOREIGN_KEY_CHECKS = 0;");
        foreach ($required_tables as $table) {
            $conn->query("DROP TABLE IF EXISTS `{$table}`");
            $logs[] = "Menghapus tabel `{$table}` jika ada.";
        }
        $conn->query("SET FOREIGN_KEY_CHECKS = 1;");
        
        // Impor ulang database.sql
        $sql_file = __DIR__ . '/../database.sql';
        if (executeSQLFile($conn, $sql_file, $logs, $error_logs)) {
            $logs[] = "✅ Database berhasil di-reset ke kondisi awal.";
        } else {
            $error_logs[] = "❌ Hard reset gagal saat mengimpor skema.";
        }
    }
}

// Kumpulkan status database saat ini
$status_tables = [];
if ($authenticated && !$conn->connect_error) {
    foreach ($required_tables as $table) {
        $check = $conn->query("SHOW TABLES LIKE '{$table}'");
        if ($check && $check->num_rows > 0) {
            $count_res = $conn->query("SELECT COUNT(*) as total FROM `{$table}`");
            $count = $count_res ? $count_res->fetch_assoc()['total'] : 0;
            $status_tables[$table] = [
                'exists' => true,
                'count' => $count
            ];
        } else {
            $status_tables[$table] = [
                'exists' => false,
                'count' => 0
            ];
        }
    }
}
?>
<!DOCTYPE html>
<html lang="id">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Database Master Tool - WebGIS</title>
    <link href="https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;700;800&display=swap" rel="stylesheet">
    <style>
        body {
            font-family: 'Outfit', sans-serif;
            background-color: #0b0f19;
            color: #f1f5f9;
            margin: 0;
            padding: 40px 20px;
        }
        .container {
            max-width: 900px;
            margin: 0 auto;
            background: rgba(17, 24, 39, 0.8);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(10px);
        }
        h1 {
            color: #38bdf8;
            font-weight: 800;
            margin-top: 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 15px;
        }
        .btn-logout {
            font-size: 13px;
            padding: 6px 12px;
            background: #ef4444;
            color: white;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            text-decoration: none;
        }
        .card {
            background: rgba(30, 41, 59, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 20px;
        }
        .form-group {
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #94a3b8;
        }
        input[type="password"] {
            width: 100%;
            padding: 12px;
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 8px;
            background: #0f172a;
            color: white;
            box-sizing: border-box;
            font-size: 16px;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
        }
        .btn-warning {
            background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
        }
        .btn-danger {
            background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
        }
        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
        }
        .status-badge {
            display: inline-block;
            padding: 4px 8px;
            border-radius: 6px;
            font-size: 11px;
            font-weight: bold;
        }
        .status-ok { background: #059669; color: #ecfdf5; }
        .status-err { background: #dc2626; color: #fef2f2; }
        
        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 10px;
        }
        th, td {
            text-align: left;
            padding: 10px;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        th { color: #38bdf8; font-weight: 600; }
        
        .terminal {
            background: #020617;
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 8px;
            padding: 15px;
            font-family: monospace;
            font-size: 13px;
            max-height: 300px;
            overflow-y: auto;
            color: #34d399;
        }
        .terminal-err { color: #f87171; }
        .action-card {
            display: flex;
            flex-direction: column;
            gap: 10px;
            border-left: 4px solid #38bdf8;
            padding-left: 15px;
        }
    </style>
</head>
<body>

<div class="container">
    <h1>
        <span>🛠️ Database Master Debug Tool</span>
        <?php if ($authenticated): ?>
            <a href="?logout=1" class="btn-logout">Logout / Lock</a>
        <?php endif; ?>
    </h1>

    <?php if (!$authenticated): ?>
        <!-- Form Verifikasi PIN -->
        <div class="card" style="max-width: 400px; margin: 40px auto;">
            <h3 style="margin-top: 0; color: #38bdf8;">Keamanan Diperlukan</h3>
            <p style="color: #94a3b8; font-size: 14px;">Masukkan PIN Keamanan untuk mengakses fungsi diagnostik database.</p>
            
            <?php if (isset($login_error)): ?>
                <div style="background:#fef2f2; color:#b91c1c; padding:10px; border-radius:6px; margin-bottom:15px; font-size:14px;">
                    <?php echo htmlspecialchars($login_error); ?>
                </div>
            <?php endif; ?>

            <form method="POST" action="">
                <div class="form-group">
                    <label for="pin">PIN Keamanan</label>
                    <input type="password" id="pin" name="pin" placeholder="Masukkan PIN..." required autofocus>
                </div>
                <button type="submit" class="btn" style="width: 100%;">Masuk & Periksa</button>
            </form>
            <p style="text-align:center; font-size:12px; color:#64748b; margin-top:15px;">
                * PIN default lokal adalah <code>123456</code> (Atur via <code>DB_TOOL_PIN</code> di .env)
            </p>
        </div>
    <?php else: ?>
        <!-- Halaman Kontrol Database Utama -->
        <div class="grid">
            <!-- Sektor Status Koneksi & Tabel -->
            <div class="card" style="grid-column: span 2;">
                <h3 style="margin-top: 0; color: #38bdf8;">📊 Status Tabel Database</h3>
                <table>
                    <thead>
                        <tr>
                            <th>Nama Tabel</th>
                            <th>Keberadaan</th>
                            <th>Jumlah Data</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php foreach ($required_tables as $table): 
                            $status = $status_tables[$table] ?? ['exists' => false, 'count' => 0];
                        ?>
                            <tr>
                                <td><code><?php echo htmlspecialchars($table); ?></code></td>
                                <td>
                                    <?php if ($status['exists']): ?>
                                        <span class="status-badge status-ok">OK (Tersedia)</span>
                                    <?php else: ?>
                                        <span class="status-badge status-err">Hilang / Tidak Ada</span>
                                    <?php endif; ?>
                                </td>
                                <td><?php echo (int)$status['count']; ?> Baris</td>
                            </tr>
                        <?php endforeach; ?>
                    </tbody>
                </table>
            </div>

            <!-- Sektor Aksi Kontrol -->
            <div class="card">
                <h3 style="margin-top: 0; color: #38bdf8;">⚡ Aksi Perbaikan</h3>
                <div style="display:flex; flex-direction:column; gap:15px;">
                    
                    <form method="POST" action="" class="action-card" style="border-left-color: #3b82f6;">
                        <input type="hidden" name="action" value="check_connection">
                        <strong>Konektivitas Database</strong>
                        <small style="color:#94a3b8;">Uji ulang ping ke server MySQL dan baca info status server.</small>
                        <button type="submit" class="btn">Ping Test</button>
                    </form>

                    <form method="POST" action="" class="action-card" style="border-left-color: #10b981;">
                        <input type="hidden" name="action" value="fix_missing">
                        <strong>Buat Tabel yang Hilang</strong>
                        <small style="color:#94a3b8;">Membuat tabel yang hilang secara otomatis tanpa menyentuh tabel yang sudah ada.</small>
                        <button type="submit" class="btn btn-warning">Auto-Fix Tabel</button>
                    </form>

                    <form method="POST" action="" class="action-card" style="border-left-color: #f59e0b;">
                        <input type="hidden" name="action" value="optimize_repair">
                        <strong>Perbaiki & Optimasi</strong>
                        <small style="color:#94a3b8;">Menjalankan perintah SQL REPAIR dan OPTIMIZE untuk memperbaiki data corrupt.</small>
                        <button type="submit" class="btn btn-warning">Repair & Optimize</button>
                    </form>

                    <form method="POST" action="" class="action-card" style="border-left-color: #ef4444;" onsubmit="return confirm('⚠️ PERINGATAN KERAS! Tindakan ini akan menghapus semua data Anda secara permanen dan mereset database. Lanjutkan?');">
                        <input type="hidden" name="action" value="hard_reset">
                        <strong>Reset Ulang (Hard Reset)</strong>
                        <small style="color:#ef4444; font-weight:bold;">Menghapus semua tabel dan mengimpor ulang skema awal dari database.sql.</small>
                        <button type="submit" class="btn btn-danger">Hapus & Reset Database</button>
                    </form>
                </div>
            </div>
        </div>

        <!-- Terminal Output Log -->
        <?php if (!empty($logs) || !empty($error_logs)): ?>
            <div class="card">
                <h3 style="margin-top: 0; color: #34d399;">💻 Output Log Eksekusi</h3>
                <div class="terminal">
                    <?php foreach ($logs as $log): ?>
                        <div>[INFO] <?php echo htmlspecialchars($log); ?></div>
                    <?php endforeach; ?>
                    <?php foreach ($error_logs as $err): ?>
                        <div class="terminal-err">[ERROR] <?php echo htmlspecialchars($err); ?></div>
                    <?php endforeach; ?>
                </div>
            </div>
        <?php endif; ?>
        
        <div style="text-align: center; margin-top: 20px;">
            <a href="../index.html" style="color: #38bdf8; text-decoration: none; font-weight: 600;">&larr; Kembali ke Portal WebGIS</a>
        </div>
    <?php endif; ?>
</div>

</body>
</html>