/**
 * javascript/settings.js
 *
 * Settings panel: reads/writes unraid-podman's own configuration via
 * ajax/settings.php (podman.cfg + the autostart list) — not a
 * PodmanClient/libpod concern, see that file's header comment.
 */
(function () {
  'use strict';
  const P = window.Podman;
  let autostartNames = [];

  function renderAutostart() {
    const tbody = P.el('autostart-tbody');
    tbody.innerHTML = autostartNames.length
      ? autostartNames.map(function (name, i) {
        return '<tr data-index="' + i + '">' +
          '<td class="tnum">' + (i + 1) + '</td>' +
          '<td>' + P.escapeHtml(name) + '</td>' +
          '<td class="podman-actions"><div class="podman-actions-row">' +
          '<button class="podman-btn podman-btn-icon" data-action="up"' + (i === 0 ? ' disabled' : '') + ' title="Move up">&#8593;</button>' +
          '<button class="podman-btn podman-btn-icon" data-action="down"' + (i === autostartNames.length - 1 ? ' disabled' : '') + ' title="Move down">&#8595;</button>' +
          '<button class="podman-btn podman-btn-icon" data-action="remove" title="Remove from autostart">&#128465;</button>' +
          '</div></td></tr>';
      }).join('')
      : '<tr><td colspan="3" class="podman-empty-note">No containers in the autostart chain.</td></tr>';
  }

  function saveAutostart() {
    return P.post('settings', 'autostart_save', { names: autostartNames }).catch(function (err) {
      alert('Could not save autostart order: ' + err.message);
    });
  }

  function fillForm(settings) {
    P.el('settings-storage-path').value = settings.storagePath;
    P.el('settings-storage-size').value = settings.storageImageSizeGb;
    P.el('settings-enabled').checked = settings.enabled;
    P.el('settings-stop-timeout').value = settings.stopTimeoutSeconds;

    autostartNames = settings.autostart.slice();
    renderAutostart();

    const versions = settings.packageVersions || {};
    const order = ['PODMAN', 'CONMON', 'CRUN', 'NETAVARK', 'AARDVARK_DNS', 'PASST', 'FUSE_OVERLAYFS'];
    P.el('settings-package-versions').textContent = order
      .map(function (k) { return k.toLowerCase().replace('_', '-') + ' ' + (versions[k + '_INSTALLED_VERSION'] || '?'); })
      .join(' · ');
  }

  function load() {
    return P.get('settings', 'get').then(fillForm).catch(function (err) {
      alert('Could not load settings: ' + err.message);
    });
  }

  function save() {
    const body = {
      storagePath: P.el('settings-storage-path').value.trim(),
      storageImageSizeGb: parseInt(P.el('settings-storage-size').value, 10) || 20,
      enabled: P.el('settings-enabled').checked,
      stopTimeoutSeconds: parseInt(P.el('settings-stop-timeout').value, 10) || 10,
    };
    return P.post('settings', 'save', body).then(function () {
      alert('Saved. Restart podman (rc.podman restart) to apply storage/enabled changes.');
    }).catch(function (err) {
      alert('Save failed: ' + err.message);
    });
  }

  function init() {
    P.el('settings-save-btn').addEventListener('click', save);

    P.el('autostart-tbody').addEventListener('click', function (e) {
      const btn = e.target.closest('button[data-action]');
      if (!btn) return;
      const i = parseInt(btn.closest('tr').dataset.index, 10);
      const action = btn.dataset.action;

      if (action === 'remove') {
        autostartNames.splice(i, 1);
      } else if (action === 'up' && i > 0) {
        [autostartNames[i - 1], autostartNames[i]] = [autostartNames[i], autostartNames[i - 1]];
      } else if (action === 'down' && i < autostartNames.length - 1) {
        [autostartNames[i + 1], autostartNames[i]] = [autostartNames[i], autostartNames[i + 1]];
      }
      renderAutostart();
      saveAutostart();
    });

    return load();
  }

  P.registerPanel('settings', { init: init, refresh: load });
})();