<?php
$pdo = module_fn('pi_control', 'pdo');
module_fn('pi_control', 'ensure_schema');
$table = fn(string $name) => module_fn('pi_control', 'table', $name);

$notice = null;
$error = null;
$terminalNotice = null;
$terminalError = null;
$terminalUrl = null;
$terminalToken = null;

$settings = modules()->settings('pi_control');
$ttydUrl = trim((string)($settings['ttyd_url'] ?? '/ttyd'));
$defaultProvider = 'ttyd';
$defaultTimeout = (int)($settings['exec_default_timeout'] ?? 300);
$defaultTimeout = $defaultTimeout > 0 ? $defaultTimeout : 300;
$queueName = (string)($settings['redis']['queue'] ?? 'pi_control:queue');
$tokenTtl = (int)($settings['terminal_token_ttl'] ?? 10);
$tokenTtl = $tokenTtl > 0 ? $tokenTtl : 10;

$hosts = $pdo->query('SELECT * FROM ' . $table('hosts') . ' ORDER BY name ASC')->fetchAll(PDO::FETCH_ASSOC);
$commands = $pdo->query('SELECT * FROM ' . $table('commands') . ' ORDER BY label ASC')->fetchAll(PDO::FETCH_ASSOC);

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $action = (string)($_POST['action'] ?? '');

    if ($action === 'open_console') {
        $hostId = (int)($_POST['terminal_host_id'] ?? 0);
        $provider = 'ttyd';

        if ($hostId <= 0) {
            $terminalError = 'Bitte einen Host wählen.';
        } elseif ($ttydUrl === '') {
            $terminalError = 'ttyd URL fehlt. Bitte im Setup setzen.';
        } else {
            $driver = (string)$pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
            $expiresSql = $driver === 'pgsql'
                ? "NOW() + INTERVAL '{$tokenTtl} minutes'"
                : "DATETIME('now', '+{$tokenTtl} minutes')";

            $token = bin2hex(random_bytes(24));
            $terminalToken = $token;
            $stmt = $pdo->prepare(
                'INSERT INTO ' . $table('sessions') . ' (token, host_id, provider, created_by, expires_at)
                 VALUES (:token, :host_id, :provider, :created_by, ' . $expiresSql . ')'
            );
            $stmt->execute([
                'token' => $token,
                'host_id' => $hostId,
                'provider' => $provider,
                'created_by' => auth_display_name() ?: null,
            ]);

            $sep = str_contains($ttydUrl, '?') ? '&' : '?';
            $terminalUrl = rtrim($ttydUrl, '/') . '/' . $sep . 'arg=' . rawurlencode($token);
        }
    } else {
        $hostId = (int)($_POST['host_id'] ?? 0);
        $commandId = (int)($_POST['command_id'] ?? 0);
        $rawCommand = trim((string)($_POST['command_text'] ?? ''));
        $timeoutSec = $defaultTimeout;

        if ($hostId <= 0) {
            $error = 'Bitte einen Host wählen.';
        } elseif ($commandId <= 0 && $rawCommand === '') {
            $error = 'Bitte einen Befehl wählen oder einen Befehl eingeben.';
        } else {
            $selectedCommand = '';
            if ($commandId > 0) {
                foreach ($commands as $c) {
                    if ((int)$c['id'] === $commandId) {
                        if (!auth_is_admin() && !empty($c['admin_only'])) {
                            $error = 'Dieser Befehl ist nur für Admins.';
                        } else {
                            $selectedCommand = (string)$c['command'];
                            if (!empty($c['timeout_sec'])) {
                                $timeoutSec = (int)$c['timeout_sec'];
                            }
                        }
                        break;
                    }
                }
            }

            if (!$error) {
                $commandText = $selectedCommand !== '' ? $selectedCommand : $rawCommand;
                $driver = (string)$pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
                if ($driver === 'pgsql') {
                    $stmt = $pdo->prepare(
                        'INSERT INTO ' . $table('runs') . ' (host_id, command_id, command_text, status, timeout_sec, created_by)
                         VALUES (:host_id, :command_id, :command_text, :status, :timeout_sec, :created_by)
                         RETURNING id'
                    );
                    $stmt->execute([
                        'host_id' => $hostId,
                        'command_id' => $commandId > 0 ? $commandId : null,
                        'command_text' => $commandText,
                        'status' => 'queued',
                        'timeout_sec' => $timeoutSec,
                        'created_by' => auth_display_name() ?: null,
                    ]);
                    $runId = (int)$stmt->fetchColumn();
                } else {
                    $stmt = $pdo->prepare(
                        'INSERT INTO ' . $table('runs') . ' (host_id, command_id, command_text, status, timeout_sec, created_by)
                         VALUES (:host_id, :command_id, :command_text, :status, :timeout_sec, :created_by)'
                    );
                    $stmt->execute([
                        'host_id' => $hostId,
                        'command_id' => $commandId > 0 ? $commandId : null,
                        'command_text' => $commandText,
                        'status' => 'queued',
                        'timeout_sec' => $timeoutSec,
                        'created_by' => auth_display_name() ?: null,
                    ]);
                    $runId = (int)$pdo->lastInsertId();
                }
                try {
                    $redis = module_fn('pi_control', 'redis');
                    $payload = json_encode(['run_id' => $runId], JSON_THROW_ON_ERROR);
                    $redis->command(['RPUSH', $queueName, $payload]);
                    $notice = 'Befehl wurde in die Queue gestellt.';
                } catch (\Throwable $e) {
                    $pdo->exec('UPDATE ' . $table('runs') . ' SET status = \'queue_error\' WHERE id = ' . (int)$runId);
                    $notice = 'Befehl gespeichert, aber Queue nicht erreichbar.';
                }
            }
        }
    }
}

$runs = $pdo->query(
    'SELECT r.*, h.name AS host_name, h.host AS host_addr
     FROM ' . $table('runs') . ' r
     LEFT JOIN ' . $table('hosts') . ' h ON h.id = r.host_id
     ORDER BY r.id DESC LIMIT 20'
)->fetchAll(PDO::FETCH_ASSOC);
?>
<div class="card">
  <div class="pill">Pi Control</div>
  <h1 style="margin-top:.75rem;">Konsole</h1>
  <p class="muted">Wähle einen Host und führe einen Befehl aus.</p>

  <?php if ($error): ?>
    <div class="card" style="margin-top:1rem; border-color:#ffb4a8; background:#fff5f3; color:#7a2114;">
      <?= e($error) ?>
    </div>
  <?php elseif ($notice): ?>
    <div class="card" style="margin-top:1rem; border-color:var(--accent-2);">
      <?= e($notice) ?>
    </div>
  <?php endif; ?>

  <div class="grid" style="margin-top:1rem;">
    <div class="card form-card" style="background:var(--panel-2);">
      <strong>Live-Konsole</strong>
      <?php if ($terminalError): ?>
        <div class="card" style="margin-top:1rem; border-color:#ffb4a8; background:#fff5f3; color:#7a2114;">
          <?= e($terminalError) ?>
        </div>
      <?php elseif ($terminalNotice): ?>
        <div class="card" style="margin-top:1rem; border-color:var(--accent-2);">
          <?= e($terminalNotice) ?>
        </div>
      <?php endif; ?>
      <form method="post" class="form-grid" style="margin-top:.75rem;">
        <input type="hidden" name="action" value="open_console">
        <label class="form-field">
          <span class="muted">Host</span>
          <select name="terminal_host_id" required title="Pi auswählen, zu dem die Konsole verbindet.">
            <option value="">Host wählen</option>
            <?php foreach ($hosts as $h): ?>
              <option value="<?= e((string)$h['id']) ?>"><?= e($h['name'] ?? $h['host']) ?></option>
            <?php endforeach; ?>
          </select>
        </label>
        <label class="form-field">
          <span class="muted">Konsole</span>
          <input type="text" value="ttyd" disabled>
        </label>
        <button class="cta-button" type="submit">Konsole öffnen</button>
      </form>

      <?php if ($terminalUrl): ?>
        <div class="card" style="margin-top:1rem;">
          <div style="display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap;">
            <strong>Aktive Konsole</strong>
            <a class="nav-link" href="<?= e($terminalUrl) ?>" target="_blank" rel="noopener">In neuem Tab öffnen</a>
          </div>
          <?php if ($terminalToken): ?>
            <div class="muted" style="margin-top:.5rem;">
              Token: <code><?= e($terminalToken) ?></code>
            </div>
          <?php endif; ?>
          <div style="margin-top:.75rem; border-radius:12px; overflow:hidden; border:1px solid var(--line); background:#0b0f17;">
            <iframe src="<?= e($terminalUrl) ?>" title="Pi Konsole" style="width:100%; height:520px; border:0;"></iframe>
          </div>
        </div>
      <?php endif; ?>
    </div>

    <div class="card form-card" style="background:var(--panel-2);">
      <strong>Befehl ausführen</strong>
      <form method="post" class="form-grid" style="margin-top:.75rem;">
        <input type="hidden" name="action" value="run_command">
        <label class="form-field">
          <span class="muted">Host</span>
          <select name="host_id" required>
            <option value="">Host wählen</option>
            <?php foreach ($hosts as $h): ?>
              <option value="<?= e((string)$h['id']) ?>"><?= e($h['name'] ?? $h['host']) ?></option>
            <?php endforeach; ?>
          </select>
        </label>
        <label class="form-field">
          <span class="muted">Preset</span>
          <select name="command_id">
            <option value="">Preset auswählen (optional)</option>
            <?php foreach ($commands as $c): ?>
              <?php if (!auth_is_admin() && !empty($c['admin_only'])) { continue; } ?>
              <option value="<?= e((string)$c['id']) ?>"><?= e($c['label'] ?? '') ?></option>
            <?php endforeach; ?>
          </select>
        </label>
        <label class="form-field">
          <span class="muted">Direkter Command</span>
          <textarea name="command_text" rows="3" placeholder="Oder Command direkt eingeben"></textarea>
        </label>
        <button class="cta-button" type="submit">Befehl senden</button>
      </form>
      <p class="muted" style="margin-top:.5rem;">Befehle werden über die Queue ausgeführt.</p>
    </div>

    <div class="card form-card" style="background:var(--panel-2);">
      <strong>Letzte Runs</strong>
      <div style="margin-top:.75rem; overflow:auto;">
        <table class="table" style="min-width:560px;">
          <thead>
            <tr>
              <th>ID</th>
              <th>Status</th>
              <th>Host</th>
              <th>Command</th>
              <th>Von</th>
              <th>Output</th>
              <th>Timeout</th>
            </tr>
          </thead>
          <tbody>
            <?php if (!$runs): ?>
              <tr><td colspan="7" class="muted">Noch keine Runs.</td></tr>
            <?php endif; ?>
            <?php foreach ($runs as $r): ?>
              <?php
                $out = (string)($r['output'] ?? '');
                $err = (string)($r['error'] ?? '');
                $snippet = $out !== '' ? $out : $err;
                if (strlen($snippet) > 140) {
                    $snippet = substr($snippet, 0, 140) . '…';
                }
              ?>
              <tr>
                <td><?= e((string)$r['id']) ?></td>
                <td><?= e($r['status'] ?? '') ?></td>
                <td><?= e($r['host_name'] ?? $r['host_addr'] ?? '') ?></td>
                <td class="muted" style="max-width:360px;"><code><?= e($r['command_text'] ?? '') ?></code></td>
                <td><?= e($r['created_by'] ?? '') ?></td>
                <td class="muted" style="max-width:240px;"><code><?= e($snippet) ?></code></td>
                <td><?= !empty($r['timeout_sec']) ? e((string)$r['timeout_sec']) . 's' : 'default' ?></td>
              </tr>
            <?php endforeach; ?>
          </tbody>
        </table>
      </div>
    </div>
  </div>
</div>