<?php
// Show errors during development
ini_set('display_errors', 1);
error_reporting(E_ALL);

// Safely get current directory
function getSafeCurrentDir() {
    $path = $_GET['path'] ?? getcwd();
    $real = realpath($path);
    return $real && is_dir($real) ? $real : getcwd();
}

$currentDir = getSafeCurrentDir();
$item = $_GET['item'] ?? '';
$itemPath = rtrim($currentDir, '/\\') . '/' . $item;

// ────────────────────────────────────────────────
//  HEADER
// ────────────────────────────────────────────────
function renderHeader($dir) {
    $parent = dirname($dir);
    ?>
    <div class="header">
        <strong>Current folder:</strong> <?= htmlspecialchars($dir) ?>
        <a href="?path=<?= urlencode($parent) ?>" class="btn up">↑ Go up</a>
    </div>
    <?php
}

// ────────────────────────────────────────────────
//  DIRECTORY LISTING
// ────────────────────────────────────────────────
function listDirectory($dir) {
    $items = array_diff(scandir($dir), ['.', '..']);
    ?>
    <ul class="file-list">
    <?php foreach ($items as $name): 
        $full = $dir . '/' . $name;
        if (is_dir($full)): ?>
            <li class="folder">
                📁 <a href="?path=<?= urlencode($full) ?>"><?= htmlspecialchars($name) ?></a>
            </li>
        <?php else: ?>
            <li class="file">
                📄 <?= htmlspecialchars($name) ?>
                <span class="actions">
                    <a href="?path=<?= urlencode($dir) ?>&action=edit&item=<?= urlencode($name) ?>">edit</a> |
                    <a href="?path=<?= urlencode($dir) ?>&action=rename&item=<?= urlencode($name) ?>">rename</a> |
                    <a href="?path=<?= urlencode($dir) ?>&action=delete&item=<?= urlencode($name) ?>" 
                       onclick="return confirm('Are you sure you want to delete this?')">delete</a>
                </span>
            </li>
        <?php endif; 
    endforeach; ?>
    </ul>
    <?php
}

// ────────────────────────────────────────────────
//  UPLOAD
// ────────────────────────────────────────────────
function handleUpload($dir) {
    if (empty($_FILES['file']['name'])) return;
    $name = basename($_FILES['file']['name']);
    $target = rtrim($dir, '/\\') . '/' . $name;
    if (move_uploaded_file($_FILES['file']['tmp_name'], $target)) {
        echo '<p class="msg success">File uploaded: ' . htmlspecialchars($name) . '</p>';
    } else {
        echo '<p class="msg error">Upload failed</p>';
    }
}

// ────────────────────────────────────────────────
//  CREATE FOLDER
// ────────────────────────────────────────────────
function handleCreateFolder($dir) {
    if (empty($_POST['folder_name'])) return;
    $name = trim($_POST['folder_name']);
    if ($name === '') return;
    $path = rtrim($dir, '/\\') . '/' . $name;
    if (!file_exists($path) && mkdir($path, 0755, true)) {
        echo '<p class="msg success">Folder created</p>';
    }
}

// ────────────────────────────────────────────────
//  CREATE FILE
// ────────────────────────────────────────────────
function handleCreateFile($dir) {
    if (empty($_POST['file_name'])) return;
    $name = trim($_POST['file_name']);
    $content = $_POST['file_content'] ?? '';
    $path = rtrim($dir, '/\\') . '/' . $name;
    if (!file_exists($path)) {
        file_put_contents($path, $content);
        echo '<p class="msg success">File created</p>';
    }
}

// ────────────────────────────────────────────────
//  EDIT FILE
// ────────────────────────────────────────────────
function editFile($path) {
    if (isset($_POST['content'])) {
        file_put_contents($path, $_POST['content']);
        echo '<p class="msg success">Changes saved</p>';
    }
    $content = file_exists($path) ? htmlspecialchars(file_get_contents($path)) : '';
    ?>
    <div class="card">
        <h3>Editing: <?= htmlspecialchars(basename($path)) ?></h3>
        <form method="post">
            <textarea name="content"><?= $content ?></textarea>
            <div class="form-actions">
                <button type="submit" class="btn save">Save</button>
                <a href="?path=<?= urlencode(dirname($path)) ?>" class="btn cancel">Cancel</a>
            </div>
        </form>
    </div>
    <?php
}

// ────────────────────────────────────────────────
//  DELETE
// ────────────────────────────────────────────────
function deleteItem($path) {
    if (!file_exists($path)) return;
    if (is_dir($path)) {
        // Only empty directories allowed (simple safety)
        if (count(scandir($path)) === 2) {
            rmdir($path);
            echo '<p class="msg success">Folder deleted</p>';
        } else {
            echo '<p class="msg error">Folder is not empty</p>';
        }
    } else {
        unlink($path);
        echo '<p class="msg success">File deleted</p>';
    }
}

// ────────────────────────────────────────────────
//  RENAME
// ────────────────────────────────────────────────
function renameItem($oldPath) {
    if (isset($_POST['new_name'])) {
        $newName = trim($_POST['new_name']);
        if ($newName !== '') {
            $newPath = dirname($oldPath) . '/' . $newName;
            if (rename($oldPath, $newPath)) {
                echo '<p class="msg success">Renamed successfully</p>';
            } else {
                echo '<p class="msg error">Rename failed</p>';
            }
        }
    }
    $currentName = basename($oldPath);
    ?>
    <div class="card">
        <h3>Rename: <?= htmlspecialchars($currentName) ?></h3>
        <form method="post">
            <input type="text" name="new_name" value="<?= htmlspecialchars($currentName) ?>" required>
            <div class="form-actions">
                <button type="submit" class="btn">Rename</button>
                <a href="?path=<?= urlencode(dirname($oldPath)) ?>" class="btn cancel">Cancel</a>
            </div>
        </form>
    </div>
    <?php
}

// ────────────────────────────────────────────────
//  PROCESS ACTIONS
// ────────────────────────────────────────────────
handleUpload($currentDir);
handleCreateFolder($currentDir);
handleCreateFile($currentDir);

$action = $_GET['action'] ?? '';

if ($action && $item && file_exists($itemPath)) {
    echo '<div class="back"><a href="?path=' . urlencode($currentDir) . '">← Back</a></div>';

    switch ($action) {
        case 'edit':    editFile($itemPath);    break;
        case 'delete':  deleteItem($itemPath);  break;
        case 'rename':  renameItem($itemPath);  break;
    }
} else {
    // Main view
    renderHeader($currentDir);
    listDirectory($currentDir);
    ?>

    <div class="card">
        <h3>Upload File</h3>
        <form method="post" enctype="multipart/form-data">
            <input type="file" name="file" required>
            <button type="submit">Upload</button>
        </form>
    </div>

    <div class="card">
        <h3>Create Folder</h3>
        <form method="post">
            <input type="text" name="folder_name" placeholder="folder name" required>
            <button type="submit">Create</button>
        </form>
    </div>

    <div class="card">
        <h3>Create New File</h3>
        <form method="post">
            <input type="text" name="file_name" placeholder="example.txt" required>
            <textarea name="file_content" placeholder="File content..."></textarea>
            <button type="submit">Create</button>
        </form>
    </div>

    <?php
}
?>

<!-- Minimal styling -->
<style>
    body {
        font-family: -apple-system, BlinkMacSystemFont, sans-serif;
        max-width: 980px;
        margin: 2rem auto;
        line-height: 1.5;
    }
    .header {
        margin: 1.5rem 0;
        font-size: 1.3rem;
    }
    .btn {
        color: #0066cc;
        text-decoration: none;
        font-weight: 500;
        margin-left: 1rem;
    }
    .up {
        background: #f0f5ff;
        padding: 0.4rem 1rem;
        border-radius: 6px;
    }
    .file-list {
        list-style: none;
        padding: 0;
    }
    .file-list li {
        padding: 0.6rem 0;
        border-bottom: 1px solid #eee;
    }
    .folder a {
        font-weight: 600;
        color: #1d4ed8;
    }
    .actions {
        font-size: 0.9rem;
        margin-left: 1.2rem;
        color: #555;
    }
    .actions a {
        color: #444;
    }
    .card {
        background: #fafafa;
        border: 1px solid #e0e0e0;
        border-radius: 10px;
        padding: 1.4rem;
        margin: 1.8rem 0;
    }
    input[type="text"], input[type="file"], textarea {
        width: 100%;
        padding: 0.7rem;
        margin: 0.5rem 0;
        box-sizing: border-box;
        border: 1px solid #ccc;
        border-radius: 6px;
        font-family: monospace;
    }
    textarea {
        min-height: 280px;
        font-size: 0.95rem;
    }
    button {
        background: #2563eb;
        color: white;
        border: none;
        padding: 0.7rem 1.4rem;
        border-radius: 6px;
        cursor: pointer;
    }
    button:hover {
        background: #1d4ed8;
    }
    .msg {
        padding: 0.8rem;
        border-radius: 6px;
        margin: 1rem 0;
    }
    .success { background: #ecfdf5; color: #065f46; }
    .error   { background: #fee2e2; color: #991b1b; }
    .back    { margin: 1.2rem 0; font-size: 1.1rem; }
    .form-actions { margin-top: 1rem; }
    .cancel { margin-left: 1rem; color: #666; }
</style>