import { useState, useEffect } from 'react'
import { Outlet, Link, useLocation, useNavigate } from 'react-router-dom'
import {
  LayoutDashboard,
  Users,
  CreditCard,
  Settings,
  LogOut,
  Wallet,
  BookOpen,
  GitMerge,
  Crown,
  GraduationCap,
  Calendar,
  User,
  ShieldCheck,
  ChevronDown,
  ChevronUp,
} from 'lucide-react'
import { get, post } from '@/api/client'
import { clearAdminToken } from '@/api/auth'

// 主菜单（核心运营 3 项）
const primaryMenuItems = [
  { icon: LayoutDashboard, label: '数据概览', href: '/dashboard' },
  { icon: BookOpen, label: '内容管理', href: '/content' },
  { icon: Users, label: '用户管理', href: '/users' },
]
// 折叠区「更多」（字典类 + 业务）
const moreMenuItems = [
  { icon: Crown, label: 'VIP 角色', href: '/vip-roles' },
  { icon: User, label: '作者详情', href: '/author-settings' },
  { icon: ShieldCheck, label: '管理员', href: '/admin-users' },
  { icon: GraduationCap, label: '导师管理', href: '/mentors' },
  { icon: Calendar, label: '导师预约', href: '/mentor-consultations' },
  { icon: Wallet, label: '推广中心', href: '/distribution' },
  { icon: GitMerge, label: '匹配记录', href: '/match-records' },
  { icon: CreditCard, label: '推广设置', href: '/referral-settings' },
]

export function AdminLayout() {
  const location = useLocation()
  const navigate = useNavigate()
  const [mounted, setMounted] = useState(false)
  const [authChecked, setAuthChecked] = useState(false)
  const [moreExpanded, setMoreExpanded] = useState(false)

  useEffect(() => {
    setMounted(true)
  }, [])
  useEffect(() => {
    const inMore = moreMenuItems.some((item) => location.pathname === item.href)
    if (inMore) setMoreExpanded(true)
  }, [location.pathname])

  useEffect(() => {
    if (!mounted) return
    setAuthChecked(false)
    let cancelled = false
    get<{ success?: boolean }>('/api/admin')
      .then((data) => {
        if (cancelled) return
        if (data && (data as { success?: boolean }).success !== false) {
          setAuthChecked(true)
        } else {
          navigate('/login', { replace: true })
        }
      })
      .catch(() => {
        if (!cancelled) navigate('/login', { replace: true })
      })
    return () => {
      cancelled = true
    }
  }, [mounted, navigate])

  const handleLogout = async () => {
    clearAdminToken()
    try {
      await post('/api/admin/logout', {})
    } catch {
      // 忽略登出接口失败，本地已清 token
    }
    navigate('/login', { replace: true })
  }

  if (!mounted || !authChecked) {
    return (
      <div className="flex min-h-screen bg-[#0a1628]">
        <div className="w-64 bg-[#0f2137] border-r border-gray-700/50" />
        <div className="flex-1 flex items-center justify-center">
          <div className="text-[#38bdac]">加载中...</div>
        </div>
      </div>
    )
  }

  return (
    <div className="flex min-h-screen bg-[#0a1628]">
      <div className="w-64 bg-[#0f2137] flex flex-col border-r border-gray-700/50 shadow-xl">
        <div className="p-6 border-b border-gray-700/50">
          <h1 className="text-xl font-bold text-[#38bdac]">管理后台</h1>
          <p className="text-xs text-gray-400 mt-1">Soul创业派对</p>
        </div>

        <nav className="flex-1 p-4 space-y-1 overflow-y-auto">
          {primaryMenuItems.map((item) => {
            const isActive = location.pathname === item.href
            return (
              <Link
                key={item.href}
                to={item.href}
                className={`flex items-center gap-3 px-4 py-3 rounded-lg transition-colors ${
                  isActive
                    ? 'bg-[#38bdac]/20 text-[#38bdac] font-medium'
                    : 'text-gray-400 hover:bg-gray-700/50 hover:text-white'
                }`}
              >
                <item.icon className="w-5 h-5 shrink-0" />
                <span className="text-sm">{item.label}</span>
              </Link>
            )
          })}
          <button
            type="button"
            onClick={() => setMoreExpanded(!moreExpanded)}
            className="w-full flex items-center justify-between gap-3 px-4 py-3 text-gray-400 hover:bg-gray-700/50 hover:text-white rounded-lg transition-colors"
          >
            <span className="flex items-center gap-3">
              {moreExpanded ? <ChevronUp className="w-5 h-5" /> : <ChevronDown className="w-5 h-5" />}
              <span className="text-sm">更多</span>
            </span>
          </button>
          {moreExpanded && (
            <div className="space-y-1 pl-4">
              {moreMenuItems.map((item) => {
                const isActive = location.pathname === item.href
                return (
                  <Link
                    key={item.href}
                    to={item.href}
                    className={`flex items-center gap-3 px-4 py-2 rounded-lg transition-colors ${
                      isActive
                        ? 'bg-[#38bdac]/20 text-[#38bdac] font-medium'
                        : 'text-gray-400 hover:bg-gray-700/50 hover:text-white'
                    }`}
                  >
                    <item.icon className="w-5 h-5 shrink-0" />
                    <span className="text-sm">{item.label}</span>
                  </Link>
                )
              })}
            </div>
          )}
          <div className="pt-4 mt-4 border-t border-gray-700/50">
            <Link
              to="/settings"
              className={`flex items-center gap-3 px-4 py-3 rounded-lg transition-colors ${
                location.pathname === '/settings'
                  ? 'bg-[#38bdac]/20 text-[#38bdac] font-medium'
                  : 'text-gray-400 hover:bg-gray-700/50 hover:text-white'
              }`}
            >
              <Settings className="w-5 h-5 shrink-0" />
              <span className="text-sm">系统设置</span>
            </Link>
          </div>
        </nav>

        <div className="p-4 border-t border-gray-700/50 space-y-1">
          <button
            type="button"
            onClick={handleLogout}
            className="w-full flex items-center gap-3 px-4 py-3 text-gray-400 hover:text-white rounded-lg hover:bg-gray-700/50 transition-colors"
          >
            <LogOut className="w-5 h-5" />
            <span className="text-sm">退出登录</span>
          </button>
        </div>
      </div>

      <div className="flex-1 overflow-auto bg-[#0a1628] min-w-0">
        <div className="w-full min-w-[1024px] min-h-full">
          <Outlet />
        </div>
      </div>
    </div>
  )
}