<?php
session_start();

/*
  Admin Posts Panel for Mediakor
  ------------------------------
  - Protect this file (admin password below, and ideally via IP/HTTP auth).
  - Requires the `posts` table as described in index.php:

    CREATE TABLE posts (
      id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
      title VARCHAR(255) NOT NULL,
      meta  VARCHAR(255) DEFAULT NULL,
      body  TEXT NOT NULL,
      is_published TINYINT(1) NOT NULL DEFAULT 1,
      created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
*/

// --- ADMIN CONFIG ---
// !! CHANGE THIS PASSWORD !!
$adminPassword = $_ENV['MK_ADMIN_PASSWORD'] ?? 'change_this_password';

// --- DB CONFIG (match index.php) ---
$dbHost = $_ENV['DB_HOST'] ?? 'mariadb';
$dbName = $_ENV['DB_NAME'] ?? 'appdb';
$dbUser = $_ENV['DB_USER'] ?? 'appuser';
$dbPass = $_ENV['DB_PASS'] ?? 'apppass';

$pdo = null;
$dbError = null;
$message = null;

// CSRF token
if (empty($_SESSION['csrf_token'])) {
    $_SESSION['csrf_token'] = bin2hex(random_bytes(16));
}
$csrfToken = $_SESSION['csrf_token'];

function require_login() {
    if (empty($_SESSION['mk_admin_logged_in'])) {
        header('Location: admin_posts.php');
        exit;
    }
}

function h($v) {
    return htmlspecialchars((string)$v, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
}

// --- Handle login / logout ---
if (isset($_GET['logout'])) {
    unset($_SESSION['mk_admin_logged_in']);
    header('Location: admin_posts.php');
    exit;
}

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['login_password'])) {
    if (hash_equals($adminPassword, $_POST['login_password'])) {
        $_SESSION['mk_admin_logged_in'] = true;
        header('Location: admin_posts.php');
        exit;
    } else {
        $message = 'Invalid admin password.';
    }
}

$loggedIn = !empty($_SESSION['mk_admin_logged_in']);

// Connect to DB once logged in
if ($loggedIn) {
    try {
        $dsn = "mysql:host={$dbHost};dbname={$dbName};charset=utf8mb4";
        $pdo = new PDO($dsn, $dbUser, $dbPass, [
            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
        ]);
    } catch (PDOException $e) {
        $dbError = $e->getMessage();
    }
}

// --- Handle CRUD actions ---
if ($loggedIn && $pdo && $_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['action'])) {
    if (!hash_equals($csrfToken, $_POST['csrf_token'] ?? '')) {
        $message = 'Invalid CSRF token.';
    } else {
        $action = $_POST['action'];

        if ($action === 'create') {
            $title = trim($_POST['title'] ?? '');
            $meta  = trim($_POST['meta'] ?? '');
            $body  = trim($_POST['body'] ?? '');
            $is_published = isset($_POST['is_published']) ? 1 : 0;

            if ($title && $body) {
                $stmt = $pdo->prepare("
                    INSERT INTO posts (title, meta, body, is_published)
                    VALUES (:title, :meta, :body, :is_published)
                ");
                $stmt->execute([
                    ':title' => $title,
                    ':meta'  => $meta ?: null,
                    ':body'  => $body,
                    ':is_published' => $is_published,
                ]);
                $message = 'Post created.';
            } else {
                $message = 'Title and body are required.';
            }
        }

        if ($action === 'update') {
            $id    = (int)($_POST['id'] ?? 0);
            $title = trim($_POST['title'] ?? '');
            $meta  = trim($_POST['meta'] ?? '');
            $body  = trim($_POST['body'] ?? '');
            $is_published = isset($_POST['is_published']) ? 1 : 0;

            if ($id > 0 && $title && $body) {
                $stmt = $pdo->prepare("
                    UPDATE posts
                    SET title = :title,
                        meta = :meta,
                        body = :body,
                        is_published = :is_published
                    WHERE id = :id
                    LIMIT 1
                ");
                $stmt->execute([
                    ':id'    => $id,
                    ':title' => $title,
                    ':meta'  => $meta ?: null,
                    ':body'  => $body,
                    ':is_published' => $is_published,
                ]);
                $message = "Post #{$id} updated.";
            } else {
                $message = 'Title and body are required.';
            }
        }
    }
}

// Handle delete via GET (with CSRF)
if ($loggedIn && $pdo && isset($_GET['delete'], $_GET['token'])) {
    if (hash_equals($csrfToken, $_GET['token'])) {
        $id = (int)$_GET['delete'];
        if ($id > 0) {
            $stmt = $pdo->prepare("DELETE FROM posts WHERE id = :id LIMIT 1");
            $stmt->execute([':id' => $id]);
            $message = "Post #{$id} deleted.";
        }
    } else {
        $message = 'Invalid CSRF token for delete.';
    }
}

// Fetch posts + maybe a single post to edit
$posts = [];
$editPost = null;

if ($loggedIn && $pdo) {
    // List
    $stmt = $pdo->query("
        SELECT id, title, meta, is_published, created_at
        FROM posts
        ORDER BY created_at DESC, id DESC
    ");
    $posts = $stmt->fetchAll();

    // Edit
    if (isset($_GET['edit'])) {
        $id = (int)$_GET['edit'];
        if ($id > 0) {
            $stmt = $pdo->prepare("
                SELECT id, title, meta, body, is_published
                FROM posts
                WHERE id = :id
                LIMIT 1
            ");
            $stmt->execute([':id' => $id]);
            $editPost = $stmt->fetch();
        }
    }
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Mediakor — Admin Posts</title>
<style>
  :root{
    --bg:#050608;
    --panel:#101218;
    --panel-soft:#161923;
    --accent:#ff8c32;
    --accent-soft:rgba(255,140,50,0.18);
    --accent-border:rgba(255,140,50,0.5);
    --text:#f3f4f6;
    --muted:#a1a1aa;
    --divider:#23232e;
    --shadow:0 0 40px rgba(0,0,0,0.65);
  }

  *{box-sizing:border-box;margin:0;padding:0}

  body{
    min-height:100vh;
    background:
      radial-gradient(800px 600px at 75% 0%, #17141f 0, transparent 60%),
      radial-gradient(900px 700px at 0% 100%, #141019 0, transparent 60%),
      linear-gradient(160deg,#050608,#050608 40%,#080910 100%);
    color:var(--text);
    font:500 14px/1.5 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    display:flex;
    flex-direction:column;
    align-items:center;
    padding:24px 12px 40px;
  }

  .shell{
    width:100%;
    max-width:1040px;
    background:linear-gradient(145deg,var(--panel),var(--panel-soft));
    border-radius:18px;
    border:1px solid var(--divider);
    box-shadow:var(--shadow);
    padding:18px 18px 20px;
    position:relative;
    overflow:hidden;
  }

  .shell::before{
    content:"";
    position:absolute;
    inset:0;
    background:radial-gradient(600px 220px at 105% -10%,rgba(255,140,50,.15),transparent 60%);
    opacity:0.8;
    pointer-events:none;
  }

  .shell-inner{position:relative;z-index:1;}

  h1{
    font-size:20px;
    letter-spacing:0.18em;
    text-transform:uppercase;
    margin-bottom:4px;
  }

  .subtitle{
    font-size:12px;
    color:var(--muted);
    margin-bottom:16px;
  }

  a{
    color:var(--accent);
    text-decoration:none;
  }

  a:hover{text-decoration:underline;}

  .topbar{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:14px;
    gap:8px;
    flex-wrap:wrap;
  }

  .badge{
    font-size:11px;
    border-radius:999px;
    padding:3px 9px;
    border:1px solid var(--accent-border);
    background:rgba(0,0,0,.4);
    text-transform:uppercase;
    letter-spacing:0.14em;
  }

  .message{
    margin-bottom:10px;
    font-size:13px;
    padding:6px 10px;
    border-radius:10px;
    border:1px solid var(--accent-border);
    background:rgba(0,0,0,.55);
  }

  .message.error{
    border-color:#f97373;
    color:#fecaca;
  }

  .grid{
    display:grid;
    grid-template-columns:1.1fr 1.1fr;
    gap:16px;
  }

  @media (max-width:900px){
    .grid{grid-template-columns:1fr;}
  }

  .panel{
    border-radius:14px;
    border:1px solid var(--divider);
    background:rgba(5,6,10,.7);
    padding:12px 12px 10px;
  }

  .panel h2{
    font-size:14px;
    text-transform:uppercase;
    letter-spacing:0.16em;
    margin-bottom:6px;
  }

  label{
    display:block;
    font-size:11px;
    text-transform:uppercase;
    letter-spacing:0.14em;
    color:var(--muted);
    margin:8px 0 3px;
  }

  input[type="text"],
  textarea{
    width:100%;
    border-radius:10px;
    border:1px solid #3f3f46;
    background:#050608;
    color:var(--text);
    padding:7px 9px;
    font-size:13px;
    resize:vertical;
  }

  textarea{min-height:110px;}

  .chk-row{
    display:flex;
    align-items:center;
    gap:6px;
    margin-top:6px;
    font-size:12px;
    color:var(--muted);
  }

  input[type="checkbox"]{
    accent-color:var(--accent);
  }

  .btn-row{
    margin-top:10px;
    display:flex;
    gap:8px;
    align-items:center;
  }

  button{
    border-radius:999px;
    border:1px solid var(--accent-border);
    background:linear-gradient(135deg,var(--accent-soft),rgba(0,0,0,.7));
    color:var(--text);
    padding:6px 14px;
    font-size:12px;
    text-transform:uppercase;
    letter-spacing:0.16em;
    cursor:pointer;
  }

  button.secondary{
    border-color:#52525b;
    background:rgba(0,0,0,.6);
  }

  button:hover{
    filter:brightness(1.1);
  }

  table{
    width:100%;
    border-collapse:collapse;
    font-size:12px;
    margin-top:4px;
  }

  th, td{
    padding:6px 4px;
    border-bottom:1px solid #27272f;
  }

  th{
    text-align:left;
    text-transform:uppercase;
    letter-spacing:0.14em;
    color:var(--muted);
    font-size:11px;
  }

  tr:last-child td{border-bottom:none;}

  .pill{
    padding:2px 7px;
    border-radius:999px;
    font-size:10px;
    border:1px solid var(--accent-border);
    background:rgba(0,0,0,.7);
    text-transform:uppercase;
    letter-spacing:0.14em;
  }

  .pill.off{
    border-color:#52525b;
    color:#a1a1aa;
  }

  .actions a{
    margin-right:6px;
    font-size:11px;
  }

  .login-card{
    max-width:360px;
    background:linear-gradient(145deg,var(--panel),var(--panel-soft));
    border-radius:18px;
    border:1px solid var(--divider);
    box-shadow:var(--shadow);
    padding:18px 18px 16px;
  }
</style>
</head>
<body>

<?php if (!$loggedIn): ?>
  <div class="login-card">
    <h1>Mediakor Admin</h1>
    <div class="subtitle">Command Feed • Login</div>
    <?php if ($message): ?>
      <div class="message error"><?php echo h($message); ?></div>
    <?php endif; ?>
    <form method="post">
      <label for="login_password">Admin Password</label>
      <input type="password" id="login_password" name="login_password" required />
      <div class="btn-row" style="margin-top:12px;">
        <button type="submit">Enter Console</button>
      </div>
    </form>
    <p style="margin-top:10px;font-size:11px;color:var(--muted);">
      Tip: edit <code>$adminPassword</code> in <code>admin_posts.php</code> or set <code>MK_ADMIN_PASSWORD</code> in your Docker env.
    </p>
  </div>
<?php else: ?>
  <div class="shell">
    <div class="shell-inner">
      <div class="topbar">
        <div>
          <h1>Mediakor Admin</h1>
          <div class="subtitle">
            Manage posts that power the <strong>Command Feed</strong> on your homepage.
          </div>
        </div>
        <div style="text-align:right;">
          <div class="badge">Logged in as Operator</div>
          <a href="index.php" style="font-size:12px;">&larr; View Site</a> ·
          <a href="?logout=1" style="font-size:12px;">Logout</a>
        </div>
      </div>

      <?php if ($message): ?>
        <div class="message"><?php echo h($message); ?></div>
      <?php endif; ?>

      <?php if ($dbError): ?>
        <div class="message error">
          DB Error: <?php echo h($dbError); ?>
        </div>
      <?php endif; ?>

      <?php if ($pdo): ?>
      <div class="grid">
        <!-- Create / Edit Panel -->
        <div class="panel">
          <h2><?php echo $editPost ? 'Edit Post #'.h($editPost['id']) : 'New Post'; ?></h2>
          <form method="post">
            <input type="hidden" name="csrf_token" value="<?php echo h($csrfToken); ?>">
            <input type="hidden" name="action" value="<?php echo $editPost ? 'update' : 'create'; ?>">
            <?php if ($editPost): ?>
              <input type="hidden" name="id" value="<?php echo h($editPost['id']); ?>">
            <?php endif; ?>

            <label for="title">Title</label>
            <input type="text" id="title" name="title"
                   value="<?php echo h($editPost['title'] ?? ''); ?>" required />

            <label for="meta">Meta (optional)</label>
            <input type="text" id="meta" name="meta"
                   placeholder="e.g. System Log • Today"
                   value="<?php echo h($editPost['meta'] ?? ''); ?>" />

            <label for="body">Body</label>
            <textarea id="body" name="body" required><?php echo h($editPost['body'] ?? ''); ?></textarea>

            <div class="chk-row">
              <input type="checkbox" id="is_published" name="is_published"
                     <?php echo !isset($editPost['is_published']) || $editPost['is_published'] ? 'checked' : ''; ?> />
              <label for="is_published" style="margin:0;">Published</label>
            </div>

            <div class="btn-row">
              <button type="submit"><?php echo $editPost ? 'Save Changes' : 'Create Post'; ?></button>
              <?php if ($editPost): ?>
                <a href="admin_posts.php" style="font-size:11px;">Cancel edit</a>
              <?php endif; ?>
            </div>
          </form>
        </div>

        <!-- List Panel -->
        <div class="panel">
          <h2>Existing Posts</h2>
          <?php if (empty($posts)): ?>
            <p style="font-size:12px;color:var(--muted);margin-top:4px;">
              No posts found yet. Create one using the form on the left.
            </p>
          <?php else: ?>
            <table>
              <thead>
                <tr>
                  <th>ID</th>
                  <th>Title</th>
                  <th>Meta</th>
                  <th>State</th>
                  <th>Created</th>
                  <th>Actions</th>
                </tr>
              </thead>
              <tbody>
                <?php foreach ($posts as $p): ?>
                  <tr>
                    <td><?php echo h($p['id']); ?></td>
                    <td><?php echo h($p['title']); ?></td>
                    <td><?php echo h($p['meta'] ?? ''); ?></td>
                    <td>
                      <?php if ($p['is_published']): ?>
                        <span class="pill">Published</span>
                      <?php else: ?>
                        <span class="pill off">Hidden</span>
                      <?php endif; ?>
                    </td>
                    <td><?php echo h($p['created_at']); ?></td>
                    <td class="actions">
                      <a href="?edit=<?php echo h($p['id']); ?>">Edit</a>
                      <a href="?delete=<?php echo h($p['id']); ?>&token=<?php echo h($csrfToken); ?>"
                         onclick="return confirm('Delete post #<?php echo h($p['id']); ?>?');">
                        Delete
                      </a>
                    </td>
                  </tr>
                <?php endforeach; ?>
              </tbody>
            </table>
          <?php endif; ?>
        </div>
      </div>
      <?php endif; ?>
    </div>
  </div>
<?php endif; ?>

</body>
</html>