"use client";

import { useEffect, useRef, useState } from "react";
import { useRouter } from "next/navigation";
import Link from "next/link";
import {
  Ban,
  ChevronDown,
  FolderSearch,
  RotateCcw,
  Shield,
  SlidersHorizontal,
  Users,
} from "lucide-react";
import {
  apiAdminSetUserBan,
  apiListBoards,
  apiMe,
  type Board,
  type User,
} from "@/lib/api";
import { isOwner, isSuperOrOwner, ROLES } from "@/lib/roles";
import { toast } from "@/lib/toast";
import ConfirmDialog from "@/components/ConfirmDialog";
import RoleAccountModal, { type RoleAccountTarget } from "@/components/RoleAccountModal";

export interface StaffUserTarget {
  id: number;
  username: string;
  nickname: string;
  role: string;
  board_ids?: number[];
  /** 有权访客资料接口下发；未知时按未封禁处理 */
  banned?: boolean;
}

/**
 * 超管/站长对用户的前台快捷菜单：封禁、改角色、内容档案。
 * 权限仅控显隐；写操作以后端为准。
 */
export default function StaffUserMenu({
  target,
  compact = false,
  onBannedChange,
}: {
  target: StaffUserTarget;
  /** 作者栏等窄位用更小按钮 */
  compact?: boolean;
  /** 封禁态变化回调（主页徽章等） */
  onBannedChange?: (banned: boolean) => void;
}) {
  const router = useRouter();
  const menuRef = useRef<HTMLDivElement>(null);
  const [me, setMe] = useState<User | null>(null);
  const [open, setOpen] = useState(false);
  const [banned, setBanned] = useState(!!target.banned);
  const [confirmBan, setConfirmBan] = useState(false);
  const [roleOpen, setRoleOpen] = useState(false);
  const [boards, setBoards] = useState<Board[]>([]);
  const [acting, setActing] = useState(false);

  useEffect(() => {
    apiMe()
      .then((res) => setMe(res.user || null))
      .catch(() => setMe(null));
  }, []);

  useEffect(() => {
    setBanned(!!target.banned);
  }, [target.banned, target.id]);

  useEffect(() => {
    if (!open) return;
    const onDown = (e: MouseEvent) => {
      if (menuRef.current && !menuRef.current.contains(e.target as Node)) setOpen(false);
    };
    const onKey = (e: KeyboardEvent) => {
      if (e.key === "Escape") setOpen(false);
    };
    document.addEventListener("mousedown", onDown);
    document.addEventListener("keydown", onKey);
    return () => {
      document.removeEventListener("mousedown", onDown);
      document.removeEventListener("keydown", onKey);
    };
  }, [open]);

  const canManage =
    !!me &&
    isSuperOrOwner(me.role) &&
    me.id !== target.id &&
    target.role !== ROLES.OWNER;

  if (!canManage) return null;

  const openRoleModal = () => {
    setOpen(false);
    setRoleOpen(true);
    if (boards.length === 0) {
      apiListBoards()
        .then((res) => setBoards(res.boards ?? []))
        .catch(() => toast("板块列表加载失败"));
    }
  };

  const handleBanConfirm = async () => {
    const next = !banned;
    setActing(true);
    try {
      await apiAdminSetUserBan(target.id, next);
      setBanned(next);
      onBannedChange?.(next);
      setConfirmBan(false);
      toast(next ? "已封禁" : "已解封", "ok");
      router.refresh();
    } catch (e) {
      toast(e instanceof Error ? e.message : "操作失败");
    } finally {
      setActing(false);
    }
  };

  const roleTarget: RoleAccountTarget = {
    id: target.id,
    username: target.username,
    nickname: target.nickname,
    role: target.role,
    board_ids: target.board_ids,
    banned,
  };

  const itemCls =
    "w-full flex items-center gap-2.5 px-4 py-2.5 text-[13px] transition-colors hover:bg-[var(--panel-2)] focus-visible:bg-[var(--panel-2)]";

  return (
    <div className="relative" ref={menuRef}>
      <button
        type="button"
        onClick={() => setOpen((v) => !v)}
        disabled={acting}
        aria-haspopup="menu"
        aria-expanded={open}
        className={compact ? "btn btn-line btn-sm" : "btn btn-line btn-sm"}
        style={open ? { borderColor: "var(--accent)", color: "var(--accent)" } : undefined}
        data-tip="管理该用户"
      >
        <SlidersHorizontal size={13} />
        {compact ? "管理" : "管理用户"}
        <ChevronDown
          size={13}
          style={{ transition: "transform .15s", transform: open ? "rotate(180deg)" : "none" }}
        />
      </button>

      {open && (
        <div
          role="menu"
          className="absolute right-0 mt-2 w-48 overflow-hidden z-50 j13-toast-in"
          style={{
            background: "var(--panel)",
            border: "1px solid var(--line)",
            borderRadius: "var(--r)",
            boxShadow: "var(--shadow-lg)",
          }}
        >
          <button
            type="button"
            role="menuitem"
            onClick={() => {
              setOpen(false);
              setConfirmBan(true);
            }}
            className={itemCls}
            style={{ color: banned ? "var(--ok)" : "var(--danger)" }}
          >
            {banned ? <RotateCcw size={14} className="shrink-0" /> : <Ban size={14} className="shrink-0" />}
            <span className="flex-1 text-left">{banned ? "解封账号" : "封禁账号"}</span>
          </button>
          <button
            type="button"
            role="menuitem"
            onClick={openRoleModal}
            className={itemCls}
            style={{ color: "var(--ink)" }}
          >
            <Shield size={14} className="shrink-0" />
            <span className="flex-1 text-left">角色与账号</span>
          </button>
          <div style={{ height: 1, background: "var(--line)" }} />
          {isOwner(me.role) && (
            <Link
              href={`/admin/users/${target.id}`}
              role="menuitem"
              className={itemCls}
              style={{ color: "var(--ink)" }}
              onClick={() => setOpen(false)}
            >
              <FolderSearch size={14} className="shrink-0" />
              <span className="flex-1 text-left">内容档案</span>
            </Link>
          )}
          <Link
            href="/admin/users"
            role="menuitem"
            className={itemCls}
            style={{ color: "var(--ink)" }}
            onClick={() => setOpen(false)}
          >
            <Users size={14} className="shrink-0" />
            <span className="flex-1 text-left">后台用户列表</span>
          </Link>
        </div>
      )}

      <ConfirmDialog
        open={confirmBan}
        title={banned ? "解封账号" : "封禁账号"}
        message={
          banned
            ? `确定解封 @${target.username}？解封后可立即登录与互动。`
            : `确定封禁 @${target.username}？将立即强制下线，无法登录、发帖与回复；已发布内容保留。`
        }
        confirmLabel={banned ? "确认解封" : "确认封禁"}
        danger={!banned}
        busy={acting}
        onConfirm={handleBanConfirm}
        onCancel={() => setConfirmBan(false)}
      />

      <RoleAccountModal
        target={roleOpen ? roleTarget : null}
        boards={boards}
        canGrantSuper={isOwner(me.role)}
        acting={acting}
        onClose={() => setRoleOpen(false)}
        onSaved={(next) => {
          setBanned(next.banned);
          onBannedChange?.(next.banned);
          setRoleOpen(false);
          router.refresh();
        }}
        setActing={setActing}
      />
    </div>
  );
}