/** 应用框架:100vh 布局(侧栏 + 顶栏大标题 + 内容区滚动),会话守卫 */
import { useEffect, useState } from "react";
import { Outlet, useLocation, useNavigate } from "react-router-dom";
import { Avatar, Dropdown, Layout, Menu } from "antd";
import {
  DashboardOutlined,
  MailOutlined,
  CloudServerOutlined,
  GlobalOutlined,
  BellOutlined,
  KeyOutlined,
  UserOutlined,
  LogoutOutlined,
} from "@ant-design/icons";
import { health, logout, me } from "./api.ts";

const { Sider, Header, Content } = Layout;

/** # 成员变量: 侧栏菜单项 **/
const MENU_ITEMS = [
  { key: "/", icon: <DashboardOutlined />, label: "概览" },
  { key: "/nodes", icon: <CloudServerOutlined />, label: "节点 Nodes" },
  { key: "/domains", icon: <GlobalOutlined />, label: "域名 Domains" },
  { key: "/mailboxes", icon: <MailOutlined />, label: "邮箱 Mailboxes" },
  { key: "/emails", icon: <MailOutlined />, label: "邮件 Emails" },
  { key: "/webhooks", icon: <BellOutlined />, label: "Webhooks" },
  { key: "/keys", icon: <KeyOutlined />, label: "API / MCP Keys" },
];

/** # 成员变量: 路由 -> 页面标题/副标题 **/
const PAGE_META: Record<string, { title: string; subtitle: string }> = {
  "/": { title: "概览", subtitle: "节点、邮件与投递总览" },
  "/nodes": { title: "节点管理", subtitle: "通过 Cloudflare OAuth 自动安装的转发节点" },
  "/domains": { title: "域名管理", subtitle: "接入 Email Routing 的收件域名" },
  "/mailboxes": { title: "邮箱管理", subtitle: "收件地址与保留策略" },
  "/emails": { title: "邮件", subtitle: "已接收邮件(默认保留 1 天)" },
  "/webhooks": { title: "Webhooks", subtitle: "邮件事件推送与投递日志" },
  "/keys": { title: "API / MCP Keys", subtitle: "wmh_ 前缀凭据,仅创建时可见" },
};

/** # 函数
 * 应用框架组件:未登录跳 /login;顶栏展示页面标题 + 版本号(package.json 来源)
 */
export function App() {
  const navigate = useNavigate();
  const location = useLocation();
  const [ready, setReady] = useState(false);
  const [username, setUsername] = useState("");
  const [version, setVersion] = useState("");

  useEffect(() => {
    void (async () => {
      try {
        const [healthInfo, meInfo] = await Promise.all([health(), me()]);
        setVersion(healthInfo.version);
        setUsername(meInfo.user.username);
        setReady(true);
      } catch {
        navigate("/login", { replace: true });
      }
    })();
  }, [navigate]);

  if (!ready) return null;
  const meta = PAGE_META[location.pathname] ?? { title: "WmailHub", subtitle: "" };

  return (
    <Layout className="app-layout">
      <Sider width={228} className="app-sider" theme="light">
        <div className="brand">
          <img src="/logo.svg" alt="WmailHub" />
          <span className="name">WmailHub</span>
        </div>
        <Menu
          mode="inline"
          selectedKeys={[location.pathname]}
          items={MENU_ITEMS}
          onClick={({ key }) => navigate(key)}
          style={{ borderInlineEnd: "none" }}
        />
      </Sider>
      <Layout>
        <Header className="app-header">
          <div>
            <div className="title">{meta.title}</div>
            <div className="subtitle">{meta.subtitle}</div>
          </div>
          <div style={{ display: "flex", alignItems: "center", gap: 14 }}>
            <span className="muted mono">v{version}</span>
            {/* Dropdown 子元素必须是 DOM 元素(antd v6 坑),所以外包 div */}
            <div>
              <Dropdown
                menu={{
                  items: [
                    {
                      key: "logout",
                      icon: <LogoutOutlined />,
                      label: "退出登录",
                      onClick: async () => {
                        await logout().catch(() => undefined);
                        window.location.href = "/login";
                      },
                    },
                  ],
                }}
              >
                <div style={{ display: "flex", alignItems: "center", gap: 8, cursor: "pointer" }}>
                  <Avatar size={30} icon={<UserOutlined />} />
                  <span>{username}</span>
                </div>
              </Dropdown>
            </div>
          </div>
        </Header>
        <Content className="app-content">
          <Outlet />
        </Content>
      </Layout>
    </Layout>
  );
}