// Layout tab's "Saved layouts" card: save the current widget arrangement
// (placement, settings, button assignments -- see routers/api_layouts.py)
// under a name, then switch back to it later. Layouts are owned by the
// logged-in user, not this frame, so this always hits window.FRAME_BASE_API
// (the frame-level base) rather than window.FRAME_API, which the widget
// dialog machinery in frame_layout.js temporarily repoints at a specific
// widget while its gear-icon dialog is open.

let savedLayouts = [];
let editingLayoutId = null; // inline rename in progress, same pattern as frame_header.js's name pencil-edit

function renderSavedLayouts() {
  const list = document.getElementById('saved-layout-list');
  const emptyHint = document.getElementById('saved-layout-empty-hint');
  list.innerHTML = '';
  emptyHint.style.display = savedLayouts.length ? 'none' : '';

  savedLayouts.forEach((layout) => {
    const li = document.createElement('li');
    li.className = 'saved-layout-row';

    if (editingLayoutId === layout.id) {
      const input = document.createElement('input');
      input.type = 'text';
      input.maxLength = 60;
      input.value = layout.name;
      input.className = 'saved-layout-rename-input';

      const saveBtn = document.createElement('button');
      saveBtn.type = 'button';
      saveBtn.className = 'btn-inline';
      saveBtn.textContent = 'Save';
      saveBtn.addEventListener('click', () => renameSavedLayout(layout, input.value));

      const cancelBtn = document.createElement('button');
      cancelBtn.type = 'button';
      cancelBtn.className = 'btn-inline secondary';
      cancelBtn.textContent = 'Cancel';
      cancelBtn.addEventListener('click', () => { editingLayoutId = null; renderSavedLayouts(); });

      input.addEventListener('keydown', (e) => {
        if (e.key === 'Enter') renameSavedLayout(layout, input.value);
        if (e.key === 'Escape') { editingLayoutId = null; renderSavedLayouts(); }
      });

      li.appendChild(input);
      li.appendChild(saveBtn);
      li.appendChild(cancelBtn);
      list.appendChild(li);
      input.focus();
      input.select();
      return;
    }

    const nameWrap = document.createElement('span');
    nameWrap.className = 'saved-layout-name';
    const nameText = document.createElement('span');
    nameText.textContent = layout.name;
    nameWrap.appendChild(nameText);
    if (!layout.compatible) {
      const badge = document.createElement('span');
      badge.className = 'saved-layout-badge';
      badge.textContent = 'different orientation';
      nameWrap.appendChild(badge);
    }
    li.appendChild(nameWrap);

    const controls = document.createElement('span');
    controls.className = 'saved-layout-controls';

    const applyBtn = document.createElement('button');
    applyBtn.type = 'button';
    applyBtn.className = 'btn-inline';
    applyBtn.textContent = 'Apply';
    applyBtn.disabled = !layout.compatible;
    applyBtn.title = layout.compatible
      ? `Replace the current arrangement with "${layout.name}"`
      : "This layout was saved for a different orientation's grid";
    applyBtn.addEventListener('click', () => applySavedLayout(layout));
    controls.appendChild(applyBtn);

    const renameBtn = document.createElement('button');
    renameBtn.type = 'button';
    renameBtn.className = 'icon-btn';
    renameBtn.textContent = '✎'; // pencil
    renameBtn.title = 'Rename';
    renameBtn.addEventListener('click', () => { editingLayoutId = layout.id; renderSavedLayouts(); });
    controls.appendChild(renameBtn);

    const deleteBtn = document.createElement('button');
    deleteBtn.type = 'button';
    deleteBtn.className = 'icon-btn';
    deleteBtn.textContent = '×';
    deleteBtn.title = 'Delete';
    deleteBtn.addEventListener('click', () => deleteSavedLayout(layout));
    controls.appendChild(deleteBtn);

    li.appendChild(controls);
    list.appendChild(li);
  });
}

async function loadSavedLayouts() {
  try {
    const resp = await fetch(`${window.FRAME_BASE_API}/layouts`);
    if (!resp.ok) throw new Error(await apiError(resp));
    savedLayouts = (await resp.json()).layouts;
    renderSavedLayouts();
  } catch (e) {
    showStatus(false, e.message);
  }
}

async function saveCurrentLayout() {
  const input = document.getElementById('saved-layout-name');
  const name = input.value.trim();
  if (!name) {
    showStatus(false, 'Give this layout a name first.');
    return;
  }
  const existing = savedLayouts.find((l) => l.name === name);
  if (existing && !confirm(`You already have a saved layout named "${name}" -- overwrite it with the current arrangement?`)) {
    return;
  }
  try {
    const resp = await fetch(`${window.FRAME_BASE_API}/layouts`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ name }),
    });
    if (!resp.ok) throw new Error(await apiError(resp));
    input.value = '';
    showStatus(true, `Saved layout "${name}".`);
  } catch (e) {
    showStatus(false, e.message);
  } finally {
    loadSavedLayouts();
  }
}
document.getElementById('save-layout-btn').addEventListener('click', saveCurrentLayout);
document.getElementById('saved-layout-name').addEventListener('keydown', (e) => {
  if (e.key === 'Enter') saveCurrentLayout();
});

async function applySavedLayout(layout) {
  if (!confirm(`Replace the current arrangement with "${layout.name}"? Widgets not in that layout will be removed.`)) {
    return;
  }
  try {
    const resp = await fetch(`${window.FRAME_BASE_API}/layouts/${layout.id}/apply`, { method: 'POST' });
    if (!resp.ok) throw new Error(await apiError(resp));
    showStatus(true, `Applied "${layout.name}".`);
  } catch (e) {
    showStatus(false, e.message);
  } finally {
    loadWidgets(); // see frame_layout.js -- reloads the placement canvas
  }
}

async function renameSavedLayout(layout, rawName) {
  const name = rawName.trim();
  if (!name || name === layout.name) {
    editingLayoutId = null;
    renderSavedLayouts();
    return;
  }
  try {
    const resp = await fetch(`/api/layouts/${layout.id}`, {
      method: 'PATCH',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ name }),
    });
    if (!resp.ok) throw new Error(await apiError(resp));
    showStatus(true, 'Renamed.');
    editingLayoutId = null;
  } catch (e) {
    showStatus(false, e.message);
  } finally {
    loadSavedLayouts();
  }
}

async function deleteSavedLayout(layout) {
  if (!confirm(`Delete the saved layout "${layout.name}"? This can't be undone.`)) return;
  try {
    const resp = await fetch(`/api/layouts/${layout.id}`, { method: 'DELETE' });
    if (!resp.ok) throw new Error(await apiError(resp));
    showStatus(true, 'Deleted.');
  } catch (e) {
    showStatus(false, e.message);
  } finally {
    loadSavedLayouts();
  }
}

loadSavedLayouts();