/**
 * javascript/pods.js
 *
 * Pods panel: one card per pod with its member containers nested inside,
 * backed by ajax/pods.php (which itself cross-references containers.php's
 * data server-side — see that file for why).
 */
(function () {
  'use strict';
  const P = window.Podman;
  let allPods = [];

  function portRowHtml() {
    return '' +
      '<div class="podman-row-group-item">' +
      '<input type="text" class="mono podman-input-narrow" data-field="hostPort" placeholder="Host port">' +
      '<span>&rarr;</span>' +
      '<input type="text" class="mono podman-input-narrow" data-field="containerPort" placeholder="Container port">' +
      '<select data-field="protocol"><option value="tcp">TCP</option><option value="udp">UDP</option></select>' +
      '<button type="button" class="podman-btn podman-btn-icon podman-row-remove-btn" data-remove-row title="Remove">&times;</button>' +
      '</div>';
  }

  function addRow(groupEl) {
    const div = document.createElement('div');
    div.innerHTML = portRowHtml();
    const row = div.firstElementChild;
    row.querySelector('[data-remove-row]').addEventListener('click', function () { row.remove(); });
    groupEl.appendChild(row);
  }

  function readRows(groupEl) {
    return Array.from(groupEl.children).map(function (row) {
      const values = {};
      row.querySelectorAll('[data-field]').forEach(function (input) {
        values[input.dataset.field] = input.value.trim();
      });
      return values;
    });
  }

  function openCreatePodModal() {
    const backdrop = document.createElement('div');
    backdrop.className = 'podman-modal-backdrop';
    backdrop.innerHTML = '' +
      '<div class="podman-modal" role="dialog" aria-modal="true">' +
      '<div class="podman-modal-head"><h3>New Pod</h3></div>' +
      '<form class="podman-modal-body">' +
      '<div class="podman-modal-field"><label>Name</label>' +
      '<input type="text" id="cp-name" placeholder="my-pod">' +
      '<div class="hint">Letters, digits, ".", "_", "-" only — no spaces.</div></div>' +
      '<div class="podman-modal-field"><label>Port mappings</label>' +
      '<div class="podman-row-group" id="cp-ports"></div>' +
      '<button type="button" class="podman-btn podman-btn-ghost" data-add="port">+ Add port</button>' +
      '<div class="hint">Shared by every container later added to this pod.</div></div>' +
      '</form>' +
      '<div class="podman-modal-actions">' +
      '<button type="button" class="podman-btn podman-btn-ghost" data-role="cancel">Cancel</button>' +
      '<button type="button" class="podman-btn podman-btn-primary" data-role="submit">Create</button>' +
      '</div></div>';

    (document.querySelector('.podman-plugin') || document.body).appendChild(backdrop);

    const portsGroup = backdrop.querySelector('#cp-ports');
    addRow(portsGroup);
    backdrop.querySelector('[data-add="port"]').addEventListener('click', function () { addRow(portsGroup); });
    backdrop.querySelector('#cp-name').focus();

    function close() { backdrop.remove(); }

    function showError(message) {
      let box = backdrop.querySelector('.podman-modal-error');
      if (!box) {
        box = document.createElement('div');
        box.className = 'podman-modal-error';
        backdrop.querySelector('.podman-modal-body').appendChild(box);
      }
      box.textContent = message;
    }

    function submit() {
      const name = backdrop.querySelector('#cp-name').value.trim();
      if (!name) {
        showError('"Name" is required.');
        return;
      }
      if (!/^[a-zA-Z0-9][a-zA-Z0-9_.-]*$/.test(name)) {
        showError('"Name" can only contain letters, digits, ".", "_", "-" — no spaces. Try "' + name.replace(/[^a-zA-Z0-9_.-]+/g, '-') + '" instead.');
        return;
      }
      const ports = readRows(portsGroup).filter(function (r) { return r.hostPort && r.containerPort; });

      const submitBtn = backdrop.querySelector('[data-role="submit"]');
      submitBtn.disabled = true;
      P.post('pods', 'create', { name: name, ports: ports }).then(function () {
        close();
        return load();
      }).catch(function (err) {
        submitBtn.disabled = false;
        showError(err.message);
      });
    }

    backdrop.querySelector('[data-role="cancel"]').addEventListener('click', close);
    backdrop.querySelector('[data-role="submit"]').addEventListener('click', submit);
    backdrop.querySelector('form').addEventListener('submit', function (e) { e.preventDefault(); submit(); });
    backdrop.addEventListener('click', function (e) { if (e.target === backdrop) close(); });
    document.addEventListener('keydown', function onKey(e) {
      if (e.key === 'Escape') { close(); document.removeEventListener('keydown', onKey); }
    });
  }

  function memberRow(m) {
    return '' +
      '<tr>' +
      '<td>' + P.escapeHtml(m.name) + '</td>' +
      '<td class="mono podman-row-sub">' + P.escapeHtml(m.image) + '</td>' +
      '<td><span class="podman-chip ' + P.stateChipClass(m.state) + '"><span class="d"></span>' + P.escapeHtml(m.state) + '</span></td>' +
      '</tr>';
  }

  function podCard(pod) {
    const members = pod.members.length
      ? pod.members.map(memberRow).join('')
      : '<tr><td colspan="3" class="podman-empty-note">No member containers</td></tr>';

    return '' +
      '<div class="podman-pod-card" data-name="' + P.escapeHtml(pod.name) + '">' +
      '<div class="podman-pod-head">' +
      '<span class="podman-chip ' + P.stateChipClass(pod.status) + '"><span class="d"></span>' + P.escapeHtml(pod.status) + '</span>' +
      '<span class="name">' + P.escapeHtml(pod.name) + '</span>' +
      '<span class="infra">' + pod.containersTotal + ' container(s)</span>' +
      '<button type="button" class="podman-btn podman-btn-icon" data-action="menu" title="More">&#8942;</button>' +
      '</div>' +
      '<div class="podman-table-wrap"><table><thead><tr><th>Container</th><th>Image</th><th>Status</th></tr></thead>' +
      '<tbody>' + members + '</tbody></table></div>' +
      '</div>';
  }

  function render() {
    const grid = P.el('pods-grid');
    grid.innerHTML = allPods.length
      ? allPods.map(podCard).join('')
      : '<div class="podman-empty-note">No pods yet — create one, or run a container with a "pod" set from the Create Container form.</div>';
  }

  function load() {
    const container = P.el('podman-panel-pods');
    if (!P.el('pods-grid')) {
      container.innerHTML = '' +
        '<div class="podman-card">' +
        '<div class="podman-toolbar">' +
        '<strong style="flex:1;">Group containers sharing network/storage namespaces</strong>' +
        '<button class="podman-btn podman-btn-primary" id="pods-create-btn">+ New Pod</button>' +
        '</div>' +
        '<div id="pods-grid"></div>' +
        '</div>';
      P.el('pods-create-btn').addEventListener('click', openCreatePodModal);
      P.el('pods-grid').addEventListener('click', handleCardClick);
    }
    return P.get('pods', 'list').then(function (data) {
      allPods = data;
      render();
    }).catch(function (err) {
      P.el('pods-grid').innerHTML = '<div class="podman-error">' + P.escapeHtml(err.message) + '</div>';
    });
  }

  function handleAction(name, action, extra) {
    return P.post('pods', action, Object.assign({ name: name }, extra)).then(load).catch(function (err) {
      alert('Action failed: ' + err.message);
    });
  }

  function handleCardClick(e) {
    const btn = e.target.closest('button[data-action="menu"]');
    if (!btn) return;
    const pod = allPods.find(function (p) { return p.name === btn.closest('.podman-pod-card').dataset.name; });
    if (!pod) return;

    const items = [];
    if (pod.status === 'running') {
      items.push({ label: 'Stop', onClick: function () { handleAction(pod.name, 'stop', { timeout: 10 }); } });
      items.push({ label: 'Restart', onClick: function () { handleAction(pod.name, 'restart', { timeout: 10 }); } });
    } else {
      items.push({ label: 'Start', onClick: function () { handleAction(pod.name, 'start'); } });
    }
    items.push('separator');
    items.push({
      label: 'Remove',
      danger: true,
      onClick: function () {
        if (!confirm('Remove pod "' + pod.name + '" and all its member containers?')) return;
        handleAction(pod.name, 'remove', { force: true });
      },
    });
    P.openContextMenu(btn, items);
  }

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