import { useEffect, useLayoutEffect, useMemo, useRef, useState } from "react";
import type { MouseEvent as ReactMouseEvent } from "react";
import { createPortal } from "react-dom";
import { AlertCircle, Check, Info, LogOut } from "lucide-react";
import { IconKitSvg } from "./IconKitSvg";
import { useBodyScrollLock } from "./overlays";
import { api, setToken } from "../api";
import type { Product, Project, Team, User } from "../types";
import type { Notice, Page } from "../routes/route-config";

const SIDEBAR_COLLAPSED_KEY = "airshelf:sidebar-collapsed";

// 全局命令面板(Ctrl K / 点搜索框)—— 忠实搬设计稿 SHELL_COMMANDS,href 改成真路由导航
type Command = { id: string; group: string; label: string; sub: string; page: Page; icon: string; key?: string };
const SHELL_COMMANDS: Command[] = [
  { id: "dashboard", group: "导航", label: "工作台", sub: "任务队列、今日消耗、项目进度", page: "dashboard", icon: "dashboard", key: "D" },
  { id: "products", group: "导航", label: "商品库", sub: "管理 SKU、商品图册、卖点信息", page: "products", icon: "package", key: "P" },
  { id: "projects", group: "导航", label: "视频项目", sub: "查看五阶段短视频流水线", page: "projects", icon: "clapperboard", key: "V" },
  { id: "asset-factory", group: "导航", label: "图片生成", sub: "模特上身图、平台套图、图片创作", page: "assetFactory", icon: "sparkles", key: "I" },
  { id: "library", group: "导航", label: "资产库", sub: "素材、人物、场景、成片统一管理", page: "library", icon: "folder", key: "A" },
  { id: "team", group: "导航", label: "团队", sub: "成员、权限、额度、协作记录", page: "team", icon: "users" },
  { id: "account", group: "导航", label: "消费", sub: "余额、充值、账单流水", page: "account", icon: "creditCard" },
  { id: "settings", group: "导航", label: "设置", sub: "个人信息、通知、安全、偏好", page: "settings", icon: "settings" },
  { id: "messages", group: "常用动作", label: "消息中心", sub: "任务提醒、协作评论、系统通知", page: "messages", icon: "bell", key: "M" },
  { id: "new-product", group: "常用动作", label: "新建商品", sub: "从商品信息开始生成素材与视频", page: "productCreateUpload", icon: "productPlus" },
  { id: "new-project", group: "常用动作", label: "新建视频项目", sub: "选择商品并进入脚本配置", page: "projectWizard", icon: "clapperboard" },
  { id: "model-photo", group: "常用动作", label: "生成模特上身图", sub: "快速生成 3:4 商品展示素材", page: "modelPhoto", icon: "users" },
  { id: "platform-cover", group: "常用动作", label: "生成平台套图", sub: "适配电商平台封面与详情图", page: "platformCover", icon: "images" },
  { id: "image-optimize", group: "常用动作", label: "图片创作", sub: "对话式生成、编辑、加入资产库", page: "imageOptimize", icon: "images" }
];

function CommandPalette({ open, onClose, navigate, canManageBilling = true }: { open: boolean; onClose: () => void; navigate: Navigate; canManageBilling?: boolean }) {
  const [query, setQuery] = useState("");
  useBodyScrollLock(open);
  useEffect(() => { if (open) setQuery(""); }, [open]);
  const items = useMemo(() => {
    const q = query.trim().toLowerCase();
    // 非主账号:命令面板里也不暴露「团队」「消费」(与侧栏一致,PMC#3)
    return SHELL_COMMANDS
      .filter((cmd) => canManageBilling || (cmd.page !== "team" && cmd.page !== "account"))
      .filter((cmd) => !q || [cmd.label, cmd.sub, cmd.group, cmd.id].join(" ").toLowerCase().includes(q));
  }, [query, canManageBilling]);
  const run = (cmd: Command) => { onClose(); navigate(cmd.page); };
  if (!open) return null;
  let lastGroup = "";
  return createPortal(
    <div
      id="shell-command-bg"
      className="shell-command-bg show"
      aria-hidden="false"
      onClick={(event) => { if (event.target === event.currentTarget) onClose(); }}
    >
      <div className="shell-command" role="dialog" aria-modal="true" aria-label="命令面板">
        <div className="shell-command-h">
          <span className="ic"><IconKitSvg name="search" /></span>
          <input
            id="shell-command-input"
            autoFocus
            placeholder="搜索页面、动作…"
            value={query}
            onChange={(event) => setQuery(event.target.value)}
            onKeyDown={(event) => {
              if (event.key === "Escape") { event.preventDefault(); onClose(); }
              else if (event.key === "Enter" && items[0]) { event.preventDefault(); run(items[0]); }
            }}
          />
          <span id="shell-command-count" className="shell-command-count">{items.length} 项</span>
          <button id="shell-command-close" type="button" className="shell-command-close" aria-label="关闭" onClick={onClose}>Esc</button>
        </div>
        <div id="shell-command-list" className="shell-command-list">
          {items.length === 0 && (
            <div className="shell-command-empty">
              <IconKitSvg name="search" />
              <span>没有匹配的入口</span>
              <span className="shell-command-section">// 换个关键词试试</span>
            </div>
          )}
          {items.map((cmd, i) => {
            const section = cmd.group !== lastGroup ? <div className="shell-command-section">{cmd.group}</div> : null;
            lastGroup = cmd.group;
            return (
              <div key={cmd.id}>
                {section}
                <button className={`shell-command-item${i === 0 ? " active" : ""}`} type="button" onClick={() => run(cmd)}>
                  <span className="cmd-ic"><IconKitSvg name={cmd.icon} /></span>
                  <span className="cmd-main">
                    <span className="cmd-title">{cmd.label}</span>
                    <span className="cmd-sub">{cmd.sub}</span>
                  </span>
                  {cmd.key && <span className="cmd-key">{cmd.key}</span>}
                </button>
              </div>
            );
          })}
        </div>
      </div>
    </div>,
    document.body
  );
}

type Navigate = (page: Page) => void;

// 账户下拉菜单 —— 忠实搬设计稿 shell.js 的 accountMenuHtml + toggleAccountMenu 定位逻辑。
// 触发器(侧栏 .user / 顶栏头像)传入自己的 DOMRect 当锚点;菜单 fixed 定位、右对齐锚点、
// 越界自动翻到锚点上方,并钳进视口。点外部 / Esc 收起。各项 navigate,退出走 logout。
// 认证定调:头像下方第二行展示「用户名」(user.username),本项目不用邮箱。
const ACCOUNT_ITEMS: { act: Page; icon: string; label: string }[] = [
  { act: "settings", icon: "settings", label: "个人设置" },
  { act: "messages", icon: "bell", label: "消息中心" },
  { act: "team", icon: "users", label: "团队管理" },
  { act: "account", icon: "creditCard", label: "消费与余额" }
];

function AccountMenu({ anchorRect, onClose, navigate, logout, user, team, canManageBilling = true }: {
  anchorRect: DOMRect;
  onClose: () => void;
  navigate: Navigate;
  logout: () => void;
  user: User;
  team: Team | null;
  canManageBilling?: boolean;
}) {
  const menuRef = useRef<HTMLDivElement>(null);
  const [pos, setPos] = useState<{ left: number; top: number }>({ left: anchorRect.left, top: anchorRect.bottom + 8 });

  // 量出真实菜单尺寸后再定位(右对齐锚点、上下翻转防溢出),与 V1 toggleAccountMenu 一致
  useLayoutEffect(() => {
    const menu = menuRef.current;
    const width = menu?.offsetWidth || 232;
    const height = menu?.offsetHeight || 260;
    let left = anchorRect.right - width;
    if (left < 12) left = anchorRect.left;
    left = Math.min(Math.max(12, left), window.innerWidth - width - 12);
    let top = anchorRect.bottom + 8;
    if (top + height > window.innerHeight - 12) top = Math.max(12, anchorRect.top - height - 8);
    setPos({ left, top });
  }, [anchorRect]);

  // 点菜单外部 / Esc → 收起(锚点本身由触发器的 toggle 处理,避免点锚点立刻又被关掉)
  useEffect(() => {
    const onDown = (event: MouseEvent) => {
      const target = event.target as Node;
      if (menuRef.current?.contains(target)) return;
      if ((target as Element).closest?.(".user, .topbar-avatar")) return;
      onClose();
    };
    const onKey = (event: KeyboardEvent) => { if (event.key === "Escape") onClose(); };
    document.addEventListener("mousedown", onDown);
    document.addEventListener("keydown", onKey);
    return () => {
      document.removeEventListener("mousedown", onDown);
      document.removeEventListener("keydown", onKey);
    };
  }, [onClose]);

  const avatar = (team?.name || user.username || "A").slice(0, 1).toUpperCase();
  const go = (page: Page) => { onClose(); navigate(page); };

  return createPortal(
    <div
      ref={menuRef}
      className="shell-account-menu show"
      id="shell-account-menu"
      role="menu"
      aria-label="账户菜单"
      style={{ left: pos.left, top: pos.top }}
    >
      <div className="shell-account-head">
        <span className="av">{user.avatar_url ? <img src={user.avatar_url} alt="头像" /> : avatar}</span>
        <span>
          <span className="nm">{team?.name || user.username}</span>
          <span className="mail">{user.username}</span>
        </span>
      </div>
      {ACCOUNT_ITEMS.filter((item) => canManageBilling || (item.act !== "team" && item.act !== "account")).map((item) => (
        <button key={item.act} type="button" role="menuitem" onClick={() => go(item.act)}>
          <IconKitSvg name={item.icon} />
          {item.label}
        </button>
      ))}
      <div className="sep" />
      <button type="button" role="menuitem" onClick={() => { onClose(); logout(); }}>
        <LogOut size={14} />
        退出登录
      </button>
    </div>,
    document.body
  );
}

type NavDef = { id: string; page: Page; label: string; icon: string; badge?: number };

const NAV: NavDef[] = [
  { id: "dashboard", page: "dashboard", label: "工作台", icon: "dashboard" },
  { id: "products", page: "products", label: "商品库", icon: "package" },
  { id: "models", page: "models", label: "模特库", icon: "model" },
  { id: "projects", page: "projects", label: "视频项目", icon: "clapperboard" },
  { id: "asset-factory", page: "assetFactory", label: "图片生成", icon: "sparkles" },
  { id: "library", page: "library", label: "资产库", icon: "library" },
  { id: "team", page: "team", label: "团队", icon: "users" },
  { id: "account", page: "account", label: "消费", icon: "creditCard" },
  { id: "trash", page: "trash", label: "垃圾桶", icon: "trash" },
  { id: "settings", page: "settings", label: "设置", icon: "settings" }
];

const PAGE_TO_NAV: Partial<Record<Page, Page>> = {
  dashboard: "dashboard",
  products: "products",
  productDetail: "products",
  productCreateUpload: "products",
  models: "models",
  projects: "projects",
  projectWizard: "projects",
  pipeline: "projects",
  assetFactory: "assetFactory",
  imageOptimize: "assetFactory",
  modelPhoto: "assetFactory",
  modelPhotoDemoA: "assetFactory",
  modelPhotoDemoB: "assetFactory",
  platformCover: "assetFactory",
  library: "library",
  team: "team",
  account: "account",
  settings: "settings",
  settingsNotify: "settings"
};

export function Sidebar({ page, navigate, user, team, canManageBilling = true, products, projects, productTotal, projectTotal, aiUnread, logout, onOpenAdmin }: {
  page: Page;
  navigate: Navigate;
  user: User;
  team: Team | null;
  // 主账号(owner=超管)才看得到「团队」「消费」入口;子账号隐藏(PMC#3)。默认 true 兼容旧调用。
  canManageBilling?: boolean;
  products: Product[];
  projects: Project[];
  productTotal?: number;
  projectTotal?: number;
  // YYX#row22:未读生成任务总数 → 「图片生成」右侧数字胶囊
  aiUnread?: number;
  // 退出登录。父级(App.tsx)有完整 logout 闭包时传入;未传时用自带兜底
  // (best-effort 调登出接口 + 清 token + 跳 /login),保证侧栏账户菜单的"退出"今天就可用。
  logout?: () => void;
  // 平台超管入口:仅 user.is_platform_admin 时显示,点了进 /admin 后台
  onOpenAdmin?: () => void;
}) {
  const activeNav = PAGE_TO_NAV[page];
  // 子账号:导航里去掉「团队」「消费」两项(命令面板、账户菜单同步过滤)。
  const navItems = NAV.filter((item) => canManageBilling || (item.page !== "team" && item.page !== "account"));
  // 徽标用后端真实总数(分页 count),不用已加载的页内条数
  const badges: Partial<Record<string, number>> = { products: productTotal ?? products.length, projects: projectTotal ?? projects.length };
  // YYX#row22:有未读生成任务才显示胶囊(0 不显示)
  if (aiUnread && aiUnread > 0) badges["asset-factory"] = aiUnread;
  const avatar = (team?.name || user.username || "A").slice(0, 1).toUpperCase();

  // 收窄/展开导航:与设计稿 Shell.toggleSidebarCollapse 一致 —— 切 body.sidebar-collapsed
  // 类(CSS 在 design-restraint.css),并持久化到 localStorage。
  const [collapsed, setCollapsed] = useState(() => localStorage.getItem(SIDEBAR_COLLAPSED_KEY) === "1");
  useEffect(() => {
    document.body.classList.toggle("sidebar-collapsed", collapsed);
    localStorage.setItem(SIDEBAR_COLLAPSED_KEY, collapsed ? "1" : "0");
    return () => document.body.classList.remove("sidebar-collapsed");
  }, [collapsed]);

  // 移动端导航抽屉:窄屏侧栏默认收起(display:none),靠左上汉堡键拉出为浮层 + 背景遮罩。
  // 点导航项 / 遮罩 / Esc 关闭。桌面端(>1100px)汉堡键 CSS 隐藏,不影响原有收窄逻辑。
  const [mobileNavOpen, setMobileNavOpen] = useState(false);
  useEffect(() => {
    if (!mobileNavOpen) return;
    const onKey = (event: KeyboardEvent) => { if (event.key === "Escape") setMobileNavOpen(false); };
    document.addEventListener("keydown", onKey);
    return () => document.removeEventListener("keydown", onKey);
  }, [mobileNavOpen]);

  // 账户下拉菜单:点侧栏 .user 用其 DOMRect 当锚点展开,再次点击收起(toggle)。
  const [accountAnchor, setAccountAnchor] = useState<DOMRect | null>(null);
  const toggleAccountMenu = (event: ReactMouseEvent<HTMLElement>) => {
    const rect = event.currentTarget.getBoundingClientRect();
    setAccountAnchor((prev) => (prev ? null : rect));
  };
  // 退出兜底:父级未传 logout 时,自行 best-effort 调登出接口 + 清 token + 跳登录页。
  const handleLogout = () => {
    if (logout) { logout(); return; }
    void api.logout().catch(() => undefined);
    setToken(null);
    window.location.href = "/login";
  };

  // 命令面板:Ctrl/Cmd K 开关,点搜索框打开
  const [paletteOpen, setPaletteOpen] = useState(false);
  const openCommandPalette = () => setPaletteOpen(true);
  useEffect(() => {
    const onKey = (event: KeyboardEvent) => {
      if ((event.metaKey || event.ctrlKey) && event.key.toLowerCase() === "k") {
        event.preventDefault();
        setPaletteOpen((value) => !value);
      }
    };
    window.addEventListener("keydown", onKey);
    return () => window.removeEventListener("keydown", onKey);
  }, []);

  return (
    <>
    {/* 移动端汉堡键(桌面 CSS 隐藏)+ 抽屉遮罩 */}
    <button className="mobile-nav-btn" type="button" aria-label="打开导航" aria-expanded={mobileNavOpen} onClick={() => setMobileNavOpen(true)}>
      <span /><span /><span />
    </button>
    {mobileNavOpen && <div className="mobile-nav-backdrop" onClick={() => setMobileNavOpen(false)} />}
    <aside className={`sidebar${mobileNavOpen ? " mobile-open" : ""}`}>
      <div className="sidebar-head">
        <a className="brand" href="/dashboard" aria-label="Airshelf 工作台" onClick={(event) => { event.preventDefault(); navigate("dashboard"); }}>
          <span className="brand-clip"><img className="brand-logo" src="/assets/logo.png" alt="Airshelf" /></span>
        </a>
      </div>
      <button
        className="sidebar-toggle"
        type="button"
        aria-pressed={collapsed}
        aria-label={collapsed ? "展开导航" : "收窄导航"}
        title={collapsed ? "展开导航" : "收窄导航"}
        onClick={() => setCollapsed((value) => !value)}
      >
        <span className="sidebar-toggle-icon sidebar-toggle-icon--collapse"><IconKitSvg name="chevronLeft" size={18} strokeWidth={1.8} /></span>
        <span className="sidebar-toggle-icon sidebar-toggle-icon--expand"><IconKitSvg name="chevronRight" size={18} strokeWidth={1.8} /></span>
      </button>
      <div className="search-box" title="搜索 (Ctrl K)" role="button" tabIndex={0} onClick={openCommandPalette} onKeyDown={(event) => { if (event.key === "Enter" || event.key === " ") { event.preventDefault(); openCommandPalette(); } }}>
        <IconKitSvg name="search" />
        <input id="global-search" placeholder="搜索" readOnly aria-label="打开全局搜索" />
        <span className="kbd">Ctrl K</span>
      </div>
      <div className="nav-section">主要</div>
      <nav>
        {navItems.map((item) => (
          <a
            key={item.id}
            href={`/${item.id}`}
            className={activeNav === item.page ? "active" : ""}
            title={item.label}
            aria-label={item.label}
            onClick={(event) => { event.preventDefault(); setMobileNavOpen(false); navigate(item.page); }}
          >
            <IconKitSvg name={item.icon} />
            <span>{item.label}</span>
            {badges[item.id] !== undefined && <span className="pill-mini">{badges[item.id]}</span>}
          </a>
        ))}
      </nav>
      {user.is_platform_admin && onOpenAdmin && (
        <>
          <div className="nav-section">平台</div>
          <nav>
            <a
              href="/admin"
              title="平台后台"
              aria-label="平台后台"
              onClick={(event) => { event.preventDefault(); setMobileNavOpen(false); onOpenAdmin(); }}
            >
              <IconKitSvg name="shield" />
              <span>平台后台</span>
            </a>
          </nav>
        </>
      )}
      <div className="aside-foot">
        <div
          className="user"
          role="button"
          tabIndex={0}
          aria-haspopup="menu"
          aria-expanded={accountAnchor !== null}
          title="账户"
          onClick={toggleAccountMenu}
          onKeyDown={(event) => { if (event.key === "Enter" || event.key === " ") { event.preventDefault(); toggleAccountMenu(event as unknown as ReactMouseEvent<HTMLElement>); } }}
        >
          <div className="av">{user.avatar_url ? <img src={user.avatar_url} alt="头像" /> : avatar}</div>
          <div className="em">{team?.name || user.username}</div>
        </div>
      </div>
    </aside>
    <CommandPalette open={paletteOpen} onClose={() => setPaletteOpen(false)} navigate={navigate} canManageBilling={canManageBilling} />
    {accountAnchor && (
      <AccountMenu
        anchorRect={accountAnchor}
        onClose={() => setAccountAnchor(null)}
        navigate={navigate}
        logout={handleLogout}
        user={user}
        team={team}
        canManageBilling={canManageBilling}
      />
    )}
    </>
  );
}

export function Decorations() {
  // 与设计稿 shell.js 一致:grid-bg 底纹 + 4 个 sq-mark(写死坐标,不压内容)
  return (
    <>
      <div className="grid-bg" />
      <span className="sq-mark" style={{ top: 238, left: 478 }} />
      <span className="sq-mark" style={{ top: 478, left: 1198 }} />
      <span className="sq-mark" style={{ bottom: 300, left: 238 }} />
      <span className="sq-mark" style={{ top: 718, right: 240 }} />
    </>
  );
}

export function CornerMarks() {
  return (
    <>
      <CornerMark pos="tl" />
      <CornerMark pos="tr" />
      <CornerMark pos="bl" />
      <CornerMark pos="br" />
    </>
  );
}

export function ToastLike({ notice }: { notice: NonNullable<Notice> }) {
  // 右下角浮层:统一用设计系统 .toast(单橙 icon-box + --shadow-floating),不再随
  // success/error 变绿/红边(单一 accent 铁律)。挂载后下一帧上 .show 触发滑入进场。
  const [show, setShow] = useState(false);
  useEffect(() => {
    const raf = requestAnimationFrame(() => setShow(true));
    return () => cancelAnimationFrame(raf);
  }, []);
  const Icon = notice.type === "error" ? AlertCircle : notice.type === "info" ? Info : Check;
  return (
    <div className={`toast${show ? " show" : ""}`} role="status" aria-live="polite">
      <div className="ic-t"><Icon size={13} /></div>
      <div className="txt">{notice.text}<span className="mono">[ {notice.type.toUpperCase()} ]</span></div>
    </div>
  );
}

export function CornerMark({ pos }: { pos: "tl" | "tr" | "bl" | "br" }) {
  return (
    <span className={`corner-mark ${pos}`}>
      <svg viewBox="0 0 22 21" fill="none">
        <path d="M10.5 4C10.5 7.31371 7.81371 10 4.5 10H0.5V11H4.5C7.81371 11 10.5 13.6863 10.5 17V21H11.5V17C11.5 13.6863 14.1863 11 17.5 11H21.5V10H17.5C14.1863 10 11.5 7.31371 11.5 4V0H10.5V4Z" fill="currentColor" />
      </svg>
    </span>
  );
}