//! MNOTE 通用页面布局组件（Wolai / Notion 风格）

use leptos::prelude::*;

const SIDEBAR_TREE_JS: &str = r##"
(function(){
  function closestAction(target, selector) {
    return target && typeof target.closest === 'function' ? target.closest(selector) : null;
  }

  function resolveWorkspaceId(trigger) {
    var direct = (trigger.getAttribute('data-workspace-id') || '').trim();
    if (direct) return direct;
    var root = trigger.closest('[data-workspace-id]');
    return root ? (root.getAttribute('data-workspace-id') || '').trim() : '';
  }

  async function dispatchTreeCommand(trigger, body) {
    trigger.setAttribute('data-pending', 'true');
    trigger.setAttribute('disabled', 'disabled');
    try {
      var response = await fetch('/api/tree/commands', {
        method: 'POST',
        headers: { 'content-type': 'application/json' },
        body: JSON.stringify(body)
      });
      var payload = await response.json().catch(function(){ return null; });
      if (!response.ok || !payload || !payload.result) {
        throw new Error((payload && payload.message) || 'tree_command_failed_' + response.status);
      }
      return payload.result;
    } catch (error) {
      trigger.removeAttribute('disabled');
      trigger.setAttribute('data-pending', 'false');
      trigger.setAttribute('data-error', error instanceof Error ? error.message : String(error));
      throw error;
    }
  }

  async function createPage(trigger, parentId) {
    var workspaceId = resolveWorkspaceId(trigger);
    var effectiveParentId = (parentId || trigger.getAttribute('data-parent-id') || '').trim();
    if (!workspaceId) return;
    var result = await dispatchTreeCommand(trigger, {
      action: 'create',
      workspaceId: workspaceId,
      parentId: effectiveParentId || null,
      title: '新页面'
    });
    var nextWorkspaceId = result.workspaceId || workspaceId;
    window.location.href = '/documents/' + encodeURIComponent(result.documentId) + '?workspaceId=' + encodeURIComponent(nextWorkspaceId);
  }

  document.addEventListener('click', function(e) {
    var createTrigger = closestAction(e.target, '[data-mnote-action="create-page"]');
    if (createTrigger) {
      e.preventDefault();
      void createPage(createTrigger, null);
      return;
    }

    var tree = document.getElementById('sidebar-tree-root');
    if (!tree || !tree.contains(e.target)) return;
    var btn = closestAction(e.target, '[data-rust-action]');
    if (!btn) return;
    var nodeId = btn.getAttribute('data-node-id');
    var action = btn.getAttribute('data-rust-action');

    if (action === 'toggle') {
      var row = btn.closest('.tree-row');
      if (!row) return;
      var li = row.parentElement;
      var children = li.querySelector(':scope > .tree-children');
      if (children) {
        children.classList.toggle('tree-children--collapsed');
        var isCollapsed = children.classList.contains('tree-children--collapsed');
        row.setAttribute('aria-expanded', isCollapsed ? 'false' : 'true');
        btn.textContent = isCollapsed ? '▸' : '▾';
      }
      e.preventDefault();
    } else if (action === 'open') {
      var workspaceId = resolveWorkspaceId(btn);
      window.location.href = '/documents/' + encodeURIComponent(nodeId) + (workspaceId ? '?workspaceId=' + encodeURIComponent(workspaceId) : '');
      e.preventDefault();
    } else if (action === 'create') {
      e.preventDefault();
      void createPage(btn, nodeId);
    } else if (action === 'rename') {
      e.preventDefault();
      var title = window.prompt('重命名页面');
      if (title && title.trim()) {
        void dispatchTreeCommand(btn, {
          action: 'rename',
          workspaceId: resolveWorkspaceId(btn),
          documentId: nodeId,
          title: title.trim()
        }).then(function(){ window.location.reload(); });
      }
    }
  });

  var tree = document.getElementById('sidebar-tree-root');
  if (!tree) return;
  var currentPath = window.location.pathname;
  var match = currentPath.match(/^\/documents\/([^\/]+)/);
  if (match) {
    var activeId = match[1];
    var links = tree.querySelectorAll('[data-rust-action="open"]');
    for (var i = 0; i < links.length; i++) {
      if (links[i].getAttribute('data-node-id') === activeId) {
        links[i].closest('.tree-row').setAttribute('data-active', 'true');
      }
    }
  }
})();
"##;

/// MNOTE Wolai 风格页面布局
///
/// 包含左侧栏 + 内容区的双栏布局。
/// 侧栏显示品牌、导航链接和可选的页面树。
///
/// # 用法
///
/// ```ignore
/// view! {
///     <PageLayout current_nav="home" sidebar_tree_html={None}>
///         <section>...</section>
///     </PageLayout>
/// }
/// ```
#[component]
pub fn PageLayout(
    children: Children,
    current_nav: &'static str,
    /// 侧栏页面树 HTML（可选），由路由 handler 渲染
    #[prop(optional)]
    sidebar_tree_html: Option<String>,
    /// 工作区名称（可选），显示在侧栏顶部
    #[prop(optional)]
    workspace_name: Option<String>,
    /// workspace shell 侧栏 sections HTML（可选），由 projection 渲染
    #[prop(optional)]
    workspace_sidebar_html: Option<String>,
    /// 顶栏当前页面标题（可选）
    #[prop(optional)]
    topbar_title: Option<String>,
) -> impl IntoView {
    let sidebar_tree_html = sidebar_tree_html.unwrap_or_default();

    let ws_name = workspace_name
        .map(|value| value.trim().to_string())
        .filter(|value| !value.is_empty())
        .unwrap_or_else(|| "开发用户 的空间".to_string());
    let topbar_title = topbar_title
        .map(|value| value.trim().to_string())
        .filter(|value| !value.is_empty())
        .unwrap_or_else(|| "个人".to_string());
    let sidebar_sections_html = workspace_sidebar_html
        .map(|value| value.trim().to_string())
        .filter(|value| !value.is_empty())
        .unwrap_or_else(|| {
            let dataset = serde_json::json!({
                "workspaces": [{ "id": "default", "name": ws_name.clone() }],
                "documents": []
            });
            let projection = crate::workspace_shell::build_workspace_shell_projection(
                &dataset, "default", None, &ws_name,
            );
            crate::workspace_shell::render_workspace_shell_sidebar_html(
                &projection,
                Some(sidebar_tree_html.as_str()),
                None,
            )
        });

    view! {
        <div class="mnote-shell wolai-workspace-shell" data-mnote-web-owner="mnote-web" data-mnote-shell="workspace">
            <aside class="mnote-sidebar wolai-sidebar" data-testid="wolai-sidebar">
                <div class="mnote-sidebar-header wolai-sidebar-header" data-testid="wolai-workspace-identity">
                    <a href="/" class="mnote-sidebar-brand wolai-avatar" aria-label="工作区首页">"L"</a>
                    <span class="sidebar-workspace-name">{ws_name}</span>
                    <span class="wolai-sidebar-chevron" aria-hidden="true">"⌄"</span>
                </div>
                <nav class="mnote-sidebar-nav wolai-quick-actions" aria-label="快捷操作">
                    <a href="/search" class:active={current_nav == "search"} title="搜索"><span class="nav-icon">"⌕"</span></a>
                    <a href="/graph" title="关系图"><span class="nav-icon">"⌬"</span></a>
                    <a href="/actions" title="快捷动作"><span class="nav-icon">"↯"</span></a>
                    <a href="/inbox" title="收纳"><span class="nav-icon">"▣"</span></a>
                    <a href="/files" title="文件"><span class="nav-icon">"▱"</span></a>
                    <a href="/more" title="更多"><span class="nav-icon">"…"</span></a>
                </nav>
                <div class="wolai-sidebar-body" inner_html={sidebar_sections_html}></div>
                <script inner_html={SIDEBAR_TREE_JS.to_string()}></script>
            </aside>
            <div class="mnote-main">
                <header class="wolai-topbar" data-testid="wolai-topbar">
                    <div class="wolai-topbar-left"><span class="wolai-menu-icon">"☰"</span><span class="wolai-home-icon">"⌂"</span><span>{topbar_title}</span></div>
                    <div class="wolai-topbar-actions" aria-label="页面操作">
                        <span title="收藏">"☆"</span>
                        <span title="演示">"▻"</span>
                        <span title="评论">"◴"</span>
                        <span title="关系">"⌬"</span>
                        <span title="成员">"♙+"</span>
                        <span title="历史">"◷"</span>
                        <span title="更多">"…"</span>
                    </div>
                </header>
                <article class="mnote-content">
                    {children()}
                </article>
                <div class="wolai-floating-actions" aria-label="浮动操作">
                    <button type="button" data-testid="wolai-floating-ai" class="wolai-floating-button">"AI"</button>
                    <button type="button" data-testid="wolai-floating-help" class="wolai-floating-button">"?"</button>
                </div>
            </div>
        </div>
    }
}