// Tasks widget dialog: per-user included-task-list checkboxes + color
// pins (same shape as the calendar widget's "Included calendars"), the
// name/recently-completed settings form, and the rendered preview. Not
// a page-load script -- frame_layout.js fetches this widget's dialog
// HTML fragment, injects it into the shared <dialog>, points
// window.FRAME_API at this specific widget
// (/api/frames/{id}/widgets/{widget_id}), then calls initTasksDialog().

function loadTasksPreview() {
  document.getElementById('tasks-preview').src = `${window.FRAME_API}/preview/tasks?_=${Date.now()}`;
}

function initTasksDialog() {
  // Each task list's own include/mute toggle -- auto-saves on change,
  // not batched into the form below, since it's a data-sharing choice
  // (see api_widget_task_list_select), not a widget-wide setting. Works
  // the same element for your own lists (full add/remove) and other
  // people's (mute only) -- the server enforces which direction is
  // allowed and this just reverts the checkbox with an error message if
  // rejected.
  document.querySelectorAll('.task-list-toggle').forEach((el) => {
    el.addEventListener('change', async () => {
      try {
        const resp = await fetch(`${window.FRAME_API}/task-list-select`, {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({
            user_id: Number(el.dataset.userId),
            calendar_key: el.dataset.key,
            calendar_label: el.dataset.label,
            included: el.checked,
          }),
        });
        if (!resp.ok) throw new Error(await apiError(resp));
        showStatus(true, el.checked ? 'Task list included on this widget.' : 'Task list removed from this widget.');
        loadTasksPreview();
      } catch (e) {
        el.checked = !el.checked;
        showStatus(false, e.message);
      }
    });
  });

  // Per-task-list color pin -- owner-only (the server enforces it;
  // these buttons only ever render for the viewer's own lists anyway).
  document.querySelectorAll('.task-list-color-picker').forEach((picker) => {
    const key = picker.dataset.key;
    picker.querySelectorAll('.color-swatch').forEach((btn) => {
      btn.addEventListener('click', async () => {
        const colorIndex = btn.dataset.index === '' ? null : Number(btn.dataset.index);
        try {
          const resp = await fetch(`${window.FRAME_API}/task-list-color`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ calendar_key: key, color_index: colorIndex }),
          });
          if (!resp.ok) throw new Error(await apiError(resp));
          picker.querySelectorAll('.color-swatch').forEach((el) => el.classList.remove('selected'));
          btn.classList.add('selected');
          showStatus(true, 'Color saved.');
          loadTasksPreview();
        } catch (e) {
          showStatus(false, e.message);
        }
      });
    });
  });

  document.getElementById('tasks-config-form').addEventListener('submit', async (e) => {
    e.preventDefault();
    const body = new URLSearchParams({
      tasks_name: document.getElementById('tasks_name').value,
      tasks_show_completed: String(document.getElementById('tasks_show_completed').checked),
    });
    try {
      const resp = await fetch(`${window.FRAME_API}/config`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
        body,
      });
      if (!resp.ok) throw new Error(await apiError(resp));
      showStatus(true, 'Saved.');
      loadTasksPreview();
    } catch (e) {
      showStatus(false, e.message);
    }
  });

  document.getElementById('tasks-preview-refresh').addEventListener('click', loadTasksPreview);
  loadTasksPreview();
}

function closeTasksDialog() {
  // Nothing to tear down -- no poll interval, unlike the photos dialog.
}