"use client"

import { useEffect, useState } from "react"
import Link from "next/link"
import { usePathname } from "next/navigation"
import { cn } from "@/lib/utils"
import {
  Database,
  LayoutDashboard,
  Users,
  Target,
  X,
  ChevronDown,
  ChevronRight,
  Search,
  BarChart3,
  TrendingUp,
  Brain,
  HelpCircle,
} from "lucide-react"
import { Badge } from "@/components/ui/badge"
import { Button } from "@/components/ui/button"

interface MobileSidebarProps {
  isOpen: boolean
  onClose: () => void
}

export default function MobileSidebar({ isOpen, onClose }: MobileSidebarProps) {
  const pathname = usePathname()
  const [expandedSections, setExpandedSections] = useState({
    "user-discovery": false,
    "user-valuation": false,
    "ai-analysis": false,
  })

  const toggleSection = (section: string) => {
    setExpandedSections((prev) => ({
      ...prev,
      [section]: !prev[section],
    }))
  }

  useEffect(() => {
    if (isOpen) {
      document.body.style.overflow = "hidden"
    } else {
      document.body.style.overflow = "unset"
    }

    return () => {
      document.body.style.overflow = "unset"
    }
  }, [isOpen])

  const navItems = [
    {
      title: "数据概览",
      href: "/",
      icon: <LayoutDashboard className="h-4 w-4" />,
      primary: true,
      description: "平台整体数据分析",
    },
    {
      title: "数据中台",
      href: "/data-platform",
      icon: <Database className="h-4 w-4" />,
      primary: true,
      tag: "核心",
      description: "多源数据整合中心",
    },
    {
      title: "用户发现",
      href: "/user-discovery",
      icon: <Search className="h-4 w-4" />,
      primary: true,
      expandable: true,
      section: "user-discovery",
      description: "用户行为洞察分析",
      children: [
        {
          title: "行为分析",
          href: "/user-discovery/behavior",
          icon: <BarChart3 className="h-3 w-3" />,
          description: "用户行为模式分析",
        },
        {
          title: "用户分群",
          href: "/user-discovery/segmentation",
          icon: <Users className="h-3 w-3" />,
          description: "智能用户分群",
        },
      ],
    },
    {
      title: "用户估值",
      href: "/user-valuation",
      icon: <Target className="h-4 w-4" />,
      primary: true,
      expandable: true,
      section: "user-valuation",
      description: "用户价值评估模型",
      hasHelp: true,
      children: [
        {
          title: "估值模型",
          href: "/user-valuation/model",
          icon: <BarChart3 className="h-3 w-3" />,
          description: "RFM价值评估",
          hasHelp: true,
        },
        {
          title: "升级路径",
          href: "/user-valuation/upgrade-paths",
          icon: <TrendingUp className="h-3 w-3" />,
          description: "用户价值提升策略",
          hasHelp: true,
        },
      ],
    },
    {
      title: "AI分析",
      href: "/ai-analysis",
      icon: <Brain className="h-4 w-4" />,
      primary: true,
      expandable: true,
      section: "ai-analysis",
      description: "智能数据洞察",
      tag: "AI",
      children: [
        {
          title: "趋势识别",
          href: "/ai-analysis/trends",
          icon: <TrendingUp className="h-3 w-3" />,
          description: "AI趋势预测",
        },
        {
          title: "异常检测",
          href: "/ai-analysis/anomaly",
          icon: <Search className="h-3 w-3" />,
          description: "智能异常监控",
        },
      ],
    },
  ]

  const getTagColor = (tag: string) => {
    switch (tag) {
      case "核心":
        return "bg-blue-100 text-blue-700 border-blue-200"
      case "AI":
        return "bg-purple-100 text-purple-700 border-purple-200"
      default:
        return "bg-gray-100 text-gray-700 border-gray-200"
    }
  }

  return (
    <>
      {/* 背景遮罩 */}
      <div
        className={cn(
          "fixed inset-0 bg-black/20 backdrop-blur-sm z-40 transition-opacity duration-300",
          isOpen ? "opacity-100" : "opacity-0 pointer-events-none",
        )}
        onClick={onClose}
      />

      {/* 侧边栏 */}
      <div
        className={cn(
          "fixed left-0 top-0 h-full w-80 glass-nav safe-area-top safe-area-left z-50 transition-transform duration-300 ease-out",
          isOpen ? "translate-x-0" : "-translate-x-full",
        )}
      >
        {/* 头部 */}
        <div className="flex items-center justify-between px-4 py-3 border-b border-white/20">
          <div className="flex items-center space-x-2">
            <div className="w-6 h-6 rounded-lg glass-light flex items-center justify-center">
              <Database className="h-4 w-4 text-blue-600" />
            </div>
            <h1 className="text-sm font-semibold bg-gradient-to-r from-blue-600 to-purple-600 bg-clip-text text-transparent">
              数据资产中台
            </h1>
          </div>
          <Button variant="ghost" size="icon" onClick={onClose} className="glass-light rounded-lg h-8 w-8">
            <X className="h-4 w-4" />
          </Button>
        </div>

        {/* 导航菜单 */}
        <div className="flex-1 overflow-y-auto py-2">
          <nav className="space-y-1 px-3">
            {navItems.map((item) => (
              <div key={item.href}>
                <div
                  className={cn(
                    "flex items-center px-3 py-2 text-xs font-medium rounded-lg transition-all duration-300 group",
                    pathname === item.href
                      ? "glass-heavy text-blue-700 shadow-glass"
                      : "glass-light text-gray-700 hover:glass-heavy hover:text-blue-600",
                  )}
                >
                  <Link href={item.href} onClick={onClose} className="flex items-center flex-1 min-w-0">
                    <div className="transition-colors duration-300 flex-shrink-0">{item.icon}</div>
                    <div className="flex-1 ml-2 min-w-0">
                      <div className="flex items-center justify-between">
                        <div className="flex items-center gap-1">
                          <span className="font-medium truncate">{item.title}</span>
                          {item.hasHelp && <HelpCircle className="h-3 w-3 text-gray-400 flex-shrink-0" />}
                        </div>
                        {item.tag && (
                          <Badge
                            className={cn("text-xs px-1.5 py-0.5 rounded ml-1 flex-shrink-0", getTagColor(item.tag))}
                          >
                            {item.tag}
                          </Badge>
                        )}
                      </div>
                      <p className="text-xs text-gray-500 truncate mt-0.5">{item.description}</p>
                    </div>
                  </Link>
                  {item.expandable && (
                    <button
                      onClick={() => toggleSection(item.section!)}
                      className="ml-1 p-1 hover:bg-white/20 rounded transition-colors duration-200 flex-shrink-0"
                    >
                      {expandedSections[item.section!] ? (
                        <ChevronDown className="h-3 w-3" />
                      ) : (
                        <ChevronRight className="h-3 w-3" />
                      )}
                    </button>
                  )}
                </div>

                {/* 子菜单 */}
                {item.children && expandedSections[item.section!] && (
                  <div className="ml-4 mt-1 space-y-1">
                    {item.children.map((subItem) => (
                      <Link
                        key={subItem.href}
                        href={subItem.href}
                        onClick={onClose}
                        className={cn(
                          "flex items-center px-2 py-1.5 text-xs rounded transition-all duration-300",
                          pathname === subItem.href
                            ? "glass-light text-blue-600 shadow-glass-sm"
                            : "text-gray-600 hover:glass-light hover:text-blue-500",
                        )}
                      >
                        <div className="mr-2 text-gray-400 transition-colors duration-300 flex-shrink-0">
                          {subItem.icon}
                        </div>
                        <div className="min-w-0 flex-1">
                          <div className="flex items-center gap-1">
                            <p className="font-medium truncate">{subItem.title}</p>
                            {subItem.hasHelp && <HelpCircle className="h-3 w-3 text-gray-400 flex-shrink-0" />}
                          </div>
                          <p className="text-xs text-gray-500 truncate">{subItem.description}</p>
                        </div>
                      </Link>
                    ))}
                  </div>
                )}
              </div>
            ))}
          </nav>
        </div>

        {/* 底部信息 */}
        <div className="border-t border-white/20 p-3">
          <div className="glass-light rounded-lg p-2">
            <div className="flex items-center justify-between text-xs">
              <span className="text-gray-600">AI引擎状态</span>
              <div className="flex items-center">
                <div className="w-2 h-2 bg-green-500 rounded-full mr-1"></div>
                <span className="text-green-600">运行中</span>
              </div>
            </div>
            <div className="flex items-center justify-between text-xs mt-1">
              <span className="text-gray-600">数据同步</span>
              <span className="text-gray-500">实时</span>
            </div>
          </div>
        </div>
      </div>
    </>
  )
}