// MNote document conflict panel 运行时外置模块。
// 第一刀：纯 DOM 清理 helper clearSessionConflictSurface。
// 本文件以 type="module" 加载，执行时机可能晚于 inline script。
// web_shell.rs 的 inline clearSessionConflictSurface 会优先委托到
// window.__mnoteDocumentConflictPanelRuntime；
// 模块尚未加载或加载失败时，inline script 保留原地实现兜底。

/**
 * 清除指定 session 所有视图中冲突面板 DOM。
 * 只做 DOM 清理，不处理冲突 merge/accept/keep 业务逻辑。
 * @param {Object} session - document session 对象
 * @param {Object} deps - 依赖注入，从 inline 上下文传入
 * @param {Function} deps.sessionViews - session.views 迭代器
 */
function clearSessionConflictSurface(session, deps) {
  var views = deps && typeof deps.sessionViews === 'function'
    ? deps.sessionViews(session)
    : [];
  views.forEach(function(view) {
    var host = view.runtimeDescriptor.root.closest('.document-pane') || view.runtimeDescriptor.root;
    if (!(host instanceof HTMLElement)) return;
    host.querySelectorAll('[data-testid="mnote-editor-conflict-panel"]').forEach(function(node) { node.remove(); });
  });
}

function createSessionConflictPanel(session, message, deps) {
  deps = deps || {};
  var externalConflictMessage = String(deps.externalConflictMessage || '').trim() || '文件已在外部修改';
  var panel = document.createElement('section');
  panel.className = 'mnote-editor-conflict-panel';
  panel.setAttribute('data-testid', 'mnote-editor-conflict-panel');
  panel.setAttribute('role', 'status');
  panel.setAttribute('aria-live', 'polite');

  var heading = document.createElement('h2');
  heading.textContent = '文件冲突';
  var text = document.createElement('p');
  text.textContent = message || externalConflictMessage;
  var meta = document.createElement('div');
  meta.className = 'mnote-conflict-meta';
  var fileLabel = session && session.sessionKind === 'resource'
    ? String(session.rootUri || '') + '/' + String(session.resourcePath || session.documentId || '')
    : String(session && (session.rootUri || session.documentId) || '');
  var sourceLabel = typeof deps.conflictSourceLabel === 'function'
    ? deps.conflictSourceLabel(session)
    : '';
  meta.textContent = '文件：' + fileLabel + ' · 来源：' + (sourceLabel || '本地文件变更');

  var actions = document.createElement('div');
  actions.className = 'mnote-conflict-actions';
  var acceptDisk = document.createElement('button');
  acceptDisk.type = 'button';
  acceptDisk.textContent = '接受磁盘版本';
  acceptDisk.setAttribute('data-testid', 'mnote-conflict-accept-disk');
  var keepCurrent = document.createElement('button');
  keepCurrent.type = 'button';
  keepCurrent.textContent = '保留当前编辑器版本';
  keepCurrent.setAttribute('data-testid', 'mnote-conflict-keep-current');
  var openDiff = document.createElement('button');
  openDiff.type = 'button';
  openDiff.textContent = '打开 diff';
  openDiff.setAttribute('data-testid', 'mnote-conflict-open-diff');
  actions.append(acceptDisk, keepCurrent, openDiff);

  var diffPanel = document.createElement('div');
  diffPanel.className = 'mnote-conflict-diff-panel';
  diffPanel.setAttribute('data-testid', 'mnote-conflict-diff-panel');
  diffPanel.hidden = true;
  panel.append(heading, text, meta, actions, diffPanel);

  acceptDisk.addEventListener('click', function() {
    if (typeof deps.onAcceptDisk === 'function') deps.onAcceptDisk(session, panel);
  });
  keepCurrent.addEventListener('click', function() {
    if (typeof deps.onKeepCurrent === 'function') deps.onKeepCurrent(session, panel);
  });
  openDiff.addEventListener('click', function() {
    if (typeof deps.onOpenDiff === 'function') deps.onOpenDiff(session, panel);
  });

  return panel;
}

window.__mnoteDocumentConflictPanelRuntime = {
  clearSessionConflictSurface: clearSessionConflictSurface,
  createSessionConflictPanel: createSessionConflictPanel
};