/* kanban-settings.js — settings panel: add/rename/delete/reorder columns and lanes */
(function () {
  'use strict';

  var boardId = KANBAN.boardId;
  var panel   = document.getElementById('settings-panel');
  var overlay = document.getElementById('settings-overlay');

  /* ── Panel open/close ────────────────────────────────────── */
  document.getElementById('btn-settings').addEventListener('click', openPanel);
  document.getElementById('btn-close-settings').addEventListener('click', closePanel);
  overlay.addEventListener('click', closePanel);

  function openPanel() {
    panel.classList.add('open');
    overlay.classList.remove('d-none');
  }
  function closePanel() {
    panel.classList.remove('open');
    overlay.classList.add('d-none');
  }

  /* ── Helpers ─────────────────────────────────────────────── */
  function post(url, data, cb) {
    var params = new URLSearchParams();
    Object.keys(data).forEach(function (k) { params.append(k, data[k]); });
    fetch(url, { method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded' }, body: params.toString() })
      .then(function (r) { return r.json(); })
      .then(cb)
      .catch(function (e) { console.error(url, e); });
  }

  function postJson(url, payload, cb) {
    fetch(url, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(payload)
    }).then(function (r) { return r.json(); }).then(cb)
      .catch(function (e) { console.error(url, e); });
  }

  function collectOrder(listId) {
    return Array.from(document.querySelectorAll('#' + listId + ' li')).map(function (li, idx) {
      return { id: parseInt(li.dataset.id), position: idx };
    });
  }

  function buildListItem(id, name, editClass, deleteClass, labelClass) {
    var li = document.createElement('li');
    li.className   = 'list-group-item d-flex align-items-center gap-2 py-2';
    li.dataset.id  = id;
    li.innerHTML   =
      '<i class="bi bi-grip-vertical text-muted drag-handle" style="cursor:grab;"></i>' +
      '<span class="flex-grow-1 ' + labelClass + '">' + esc(name) + '</span>' +
      '<button class="btn btn-sm btn-link p-0 text-secondary ' + editClass + '" title="Rename"><i class="bi bi-pencil"></i></button>' +
      '<button class="btn btn-sm btn-link p-0 text-danger '  + deleteClass + '" title="Delete"><i class="bi bi-trash"></i></button>';
    return li;
  }

  function esc(s) {
    return String(s)
      .replace(/&/g, '&amp;').replace(/</g, '&lt;')
      .replace(/>/g, '&gt;').replace(/"/g, '&quot;');
  }

  /* ── Sortable reorder ─────────────────────────────────────── */
  function initSortable(listId, reorderUrl) {
    var el = document.getElementById(listId);
    Sortable.create(el, {
      handle: '.drag-handle',
      animation: 150,
      onEnd: function () {
        postJson(reorderUrl, collectOrder(listId), function (res) {
          if (!res.ok) console.error('Reorder failed', res);
        });
      }
    });
  }

  initSortable('col-list',  '/columns/reorder');
  initSortable('lane-list', '/swimlanes/reorder');

  /* ═══════════════════════════════════════════════════════════
     COLUMNS
  ═══════════════════════════════════════════════════════════ */

  /* ── Add column ───────────────────────────────────────────── */
  document.getElementById('btn-add-column').addEventListener('click', function () {
    document.getElementById('col-add-form').classList.remove('d-none');
    document.getElementById('col-add-input').focus();
  });
  document.getElementById('btn-col-add-cancel').addEventListener('click', function () {
    document.getElementById('col-add-form').classList.add('d-none');
    document.getElementById('col-add-input').value = '';
  });
  document.getElementById('btn-col-add-save').addEventListener('click', function () {
    var name = document.getElementById('col-add-input').value.trim();
    if (!name) return;
    post('/columns', { board_id: boardId, name: name }, function (res) {
      if (!res.ok) { alert(res.error || 'Failed'); return; }
      document.getElementById('col-add-form').classList.add('d-none');
      document.getElementById('col-add-input').value = '';
      var li = buildListItem(res.id, res.name, 'btn-edit-col', 'btn-delete-col', 'col-label-text');
      document.getElementById('col-list').appendChild(li);
      bindColItem(li);
      window.KanbanBoard.addColumn(res);
    });
  });

  /* ── Bind edit/delete on existing column items ─────────────── */
  function bindColItem(li) {
    li.querySelector('.btn-edit-col').addEventListener('click', function () {
      startRename(li, '.col-label-text', function (newName, done) {
        post('/columns/' + li.dataset.id, { name: newName }, function (res) {
          if (res.ok) {
            done(true);
            window.KanbanBoard.renameColumn(li.dataset.id, newName);
          } else {
            done(false);
            alert(res.error || 'Rename failed');
          }
        });
      });
    });
    li.querySelector('.btn-delete-col').addEventListener('click', function () {
      if (!confirm('Delete this column and all its cards?')) return;
      post('/columns/' + li.dataset.id + '/delete', {}, function (res) {
        if (res.ok) {
          window.KanbanBoard.removeColumn(li.dataset.id);
          li.remove();
        } else {
          alert(res.error || 'Delete failed');
        }
      });
    });
  }

  document.querySelectorAll('#col-list li').forEach(bindColItem);

  /* ═══════════════════════════════════════════════════════════
     SWIM LANES
  ═══════════════════════════════════════════════════════════ */

  /* ── Add lane ─────────────────────────────────────────────── */
  document.getElementById('btn-add-lane').addEventListener('click', function () {
    document.getElementById('lane-add-form').classList.remove('d-none');
    document.getElementById('lane-add-input').focus();
  });
  document.getElementById('btn-lane-add-cancel').addEventListener('click', function () {
    document.getElementById('lane-add-form').classList.add('d-none');
    document.getElementById('lane-add-input').value = '';
  });
  document.getElementById('btn-lane-add-save').addEventListener('click', function () {
    var name = document.getElementById('lane-add-input').value.trim();
    if (!name) return;
    post('/swimlanes', { board_id: boardId, name: name }, function (res) {
      if (!res.ok) { alert(res.error || 'Failed'); return; }
      document.getElementById('lane-add-form').classList.add('d-none');
      document.getElementById('lane-add-input').value = '';
      var li = buildListItem(res.id, res.name, 'btn-edit-lane', 'btn-delete-lane', 'lane-label-text');
      document.getElementById('lane-list').appendChild(li);
      bindLaneItem(li);
      window.KanbanBoard.addLane(res);
    });
  });

  /* ── Bind edit/delete on existing lane items ──────────────── */
  function bindLaneItem(li) {
    li.querySelector('.btn-edit-lane').addEventListener('click', function () {
      startRename(li, '.lane-label-text', function (newName, done) {
        post('/swimlanes/' + li.dataset.id, { name: newName }, function (res) {
          if (res.ok) {
            done(true);
            window.KanbanBoard.renameLane(li.dataset.id, newName);
          } else {
            done(false);
            alert(res.error || 'Rename failed');
          }
        });
      });
    });
    li.querySelector('.btn-delete-lane').addEventListener('click', function () {
      if (!confirm('Delete this swim lane and all its cards?')) return;
      post('/swimlanes/' + li.dataset.id + '/delete', {}, function (res) {
        if (res.ok) {
          window.KanbanBoard.removeLane(li.dataset.id);
          li.remove();
        } else {
          alert(res.error || 'Delete failed');
        }
      });
    });
  }

  document.querySelectorAll('#lane-list li').forEach(bindLaneItem);

  /* ── Inline rename helper ─────────────────────────────────── */
  function startRename(li, labelSel, saveCb) {
    var span = li.querySelector(labelSel);
    var oldName = span.textContent.trim();
    var input = document.createElement('input');
    input.type = 'text';
    input.className = 'form-control form-control-sm inline-rename flex-grow-1';
    input.value = oldName;
    span.replaceWith(input);
    input.focus();
    input.select();

    function commit() {
      var newName = input.value.trim();
      if (!newName || newName === oldName) {
        abort();
        return;
      }
      saveCb(newName, function (ok) {
        var replacement = document.createElement('span');
        replacement.className = labelSel.replace('.', '') + ' flex-grow-1';
        replacement.textContent = ok ? newName : oldName;
        input.replaceWith(replacement);
      });
    }
    function abort() {
      var replacement = document.createElement('span');
      replacement.className = labelSel.replace('.', '') + ' flex-grow-1';
      replacement.textContent = oldName;
      input.replaceWith(replacement);
    }
    input.addEventListener('blur', commit);
    input.addEventListener('keydown', function (e) {
      if (e.key === 'Enter')  { e.preventDefault(); commit(); }
      if (e.key === 'Escape') { e.preventDefault(); abort();  }
    });
  }

})();