import { useState } from 'react';
import { useSecurityStore } from '../../store/securityStore';
import {
  Settings as SettingsIcon,
  BarChart3,
  Puzzle,
  MessageSquare,
  FolderOpen,
  Shield,
  Info,
  ArrowLeft,
  Coins,
  Cpu,
  Zap,
  HelpCircle,
  ClipboardList,
  Clock,
  Heart,
  Key,
  Database,
  Cloud,
} from 'lucide-react';
import { silentErrorHandler } from '../../lib/error-utils';
import { General } from './General';
import { UsageStats } from './UsageStats';
import { ModelsAPI } from './ModelsAPI';
import { MCPServices } from './MCPServices';
import { Skills } from './Skills';
import { IMChannels } from './IMChannels';
import { Workspace } from './Workspace';
import { Privacy } from './Privacy';
import { About } from './About';
import { Credits } from './Credits';
import { AuditLogsPanel } from '../AuditLogsPanel';
import { SecurityStatus } from '../SecurityStatus';
import { SecurityLayersPanel } from '../SecurityLayersPanel';
import { TaskList } from '../TaskList';
import { HeartbeatConfig } from '../HeartbeatConfig';
import { SecureStorage } from './SecureStorage';
import { VikingPanel } from '../VikingPanel';
import { SaaSSettings } from '../SaaS/SaaSSettings';

interface SettingsLayoutProps {
  onBack: () => void;
}

type SettingsPage =
  | 'general'
  | 'usage'
  | 'credits'
  | 'models'
  | 'mcp'
  | 'skills'
  | 'im'
  | 'workspace'
  | 'privacy'
  | 'security'
  | 'storage'
  | 'saas'
  | 'viking'
  | 'audit'
  | 'tasks'
  | 'heartbeat'
  | 'feedback'
  | 'about';

const menuItems: { id: SettingsPage; label: string; icon: React.ReactNode }[] = [
  { id: 'general', label: '通用', icon: <SettingsIcon className="w-4 h-4" /> },
  { id: 'usage', label: '用量统计', icon: <BarChart3 className="w-4 h-4" /> },
  { id: 'credits', label: '积分详情', icon: <Coins className="w-4 h-4" /> },
  { id: 'models', label: '模型与 API', icon: <Cpu className="w-4 h-4" /> },
  { id: 'mcp', label: 'MCP 服务', icon: <Puzzle className="w-4 h-4" /> },
  { id: 'skills', label: '技能', icon: <Zap className="w-4 h-4" /> },
  { id: 'im', label: 'IM 频道', icon: <MessageSquare className="w-4 h-4" /> },
  { id: 'workspace', label: '工作区', icon: <FolderOpen className="w-4 h-4" /> },
  { id: 'privacy', label: '数据与隐私', icon: <Shield className="w-4 h-4" /> },
  { id: 'storage', label: '安全存储', icon: <Key className="w-4 h-4" /> },
  { id: 'saas', label: 'SaaS 平台', icon: <Cloud className="w-4 h-4" /> },
  { id: 'viking', label: '语义记忆', icon: <Database className="w-4 h-4" /> },
  { id: 'security', label: '安全状态', icon: <Shield className="w-4 h-4" /> },
  { id: 'audit', label: '审计日志', icon: <ClipboardList className="w-4 h-4" /> },
  { id: 'tasks', label: '定时任务', icon: <Clock className="w-4 h-4" /> },
  { id: 'heartbeat', label: '心跳配置', icon: <Heart className="w-4 h-4" /> },
  { id: 'feedback', label: '提交反馈', icon: <HelpCircle className="w-4 h-4" /> },
  { id: 'about', label: '关于', icon: <Info className="w-4 h-4" /> },
];

export function SettingsLayout({ onBack }: SettingsLayoutProps) {
  const [activePage, setActivePage] = useState<SettingsPage>('general');
  const securityStatus = useSecurityStore((s) => s.securityStatus);

  const renderPage = () => {
    switch (activePage) {
      case 'general': return <General />;
      case 'usage': return <UsageStats />;
      case 'credits': return <Credits />;
      case 'models': return <ModelsAPI />;
      case 'mcp': return <MCPServices />;
      case 'skills': return <Skills />;
      case 'im': return <IMChannels />;
      case 'workspace': return <Workspace />;
      case 'privacy': return <Privacy />;
      case 'storage': return <SecureStorage />;
      case 'saas': return <SaaSSettings />;
      case 'security': return (
        <div className="space-y-6">
          <div>
            <h1 className="text-xl font-bold text-gray-900 mb-4">安全状态</h1>
            <SecurityStatus />
          </div>
          <div>
            <h2 className="text-lg font-semibold text-gray-900 mb-4">安全架构详情</h2>
            <SecurityLayersPanel
              status={securityStatus || {
                layers: [],
                enabledCount: 0,
                totalCount: 16,
                securityLevel: 'low',
              }}
            />
          </div>
        </div>
      );
      case 'audit': return <AuditLogsPanel />;
      case 'tasks': return (
        <div className="max-w-3xl">
          <h1 className="text-xl font-bold text-gray-900 mb-6">定时任务</h1>
          <div className="bg-white rounded-xl border border-gray-200 p-6 shadow-sm">
            <TaskList />
          </div>
        </div>
      );
      case 'heartbeat': return (
        <div className="max-w-3xl h-full">
          <HeartbeatConfig />
        </div>
      );
      case 'viking': return <VikingPanel />;
      case 'feedback': return <Feedback />;
      case 'about': return <About />;
      default: return <General />;
    }
  };

  return (
    <div className="h-screen flex bg-f9fafb overflow-hidden text-gray-800 text-sm">
      {/* Left navigation */}
      <aside className="w-64 bg-gray-50 border-r border-gray-200 flex flex-col flex-shrink-0">
        {/* 返回按钮 */}
        <div className="p-4 border-b border-gray-200">
          <button
            onClick={onBack}
            className="flex items-center gap-2 text-gray-500 hover:text-gray-700 transition-colors"
          >
            <ArrowLeft className="w-4 h-4" />
            <span>返回应用</span>
          </button>
        </div>

        {/* 导航菜单 */}
        <nav className="flex-1 overflow-y-auto custom-scrollbar py-2 px-3 space-y-1">
          {menuItems.map((item) => (
            <button
              key={item.id}
              onClick={() => setActivePage(item.id)}
              className={`w-full flex items-center gap-3 px-3 py-2.5 rounded-lg text-left transition-all ${
                activePage === item.id
                  ? 'bg-gray-200 text-gray-900 font-medium'
                  : 'text-gray-500 hover:bg-black/5 hover:text-gray-700'
              }`}
            >
              {item.icon}
              <span>{item.label}</span>
            </button>
          ))}
        </nav>
      </aside>

      {/* Main content */}
      <main className="flex-1 overflow-y-auto custom-scrollbar bg-white p-8">
        {renderPage()}
      </main>
    </div>
  );
}

// Simple feedback page (inline)
function Feedback() {
  const [text, setText] = useState('');
  const [copied, setCopied] = useState(false);

  const handleCopy = async () => {
    await navigator.clipboard.writeText(text.trim());
    setCopied(true);
  };
  return (
    <div className="max-w-3xl">
      <h1 className="text-xl font-bold text-gray-900 mb-6">提交反馈</h1>
      <div className="bg-white rounded-xl border border-gray-200 p-6 shadow-sm">
        <p className="text-sm text-gray-500 mb-4">当前版本尚未接入在线反馈通道。你可以先复制下面的反馈内容，再连同截图和日志一起发给开发者。</p>
        <textarea
          value={text}
          onChange={(e) => {
            setText(e.target.value);
            if (copied) {
              setCopied(false);
            }
          }}
          placeholder="请尽量详细描述复现步骤、期望结果和实际结果"
          className="w-full h-40 border border-gray-300 rounded-lg p-3 text-sm resize-none focus:outline-none focus:border-orange-400"
        />
        <button
          onClick={() => { handleCopy().catch(silentErrorHandler('SettingsLayout')); }}
          disabled={!text.trim()}
          className="mt-4 px-6 py-2 bg-orange-500 text-white text-sm rounded-lg hover:bg-orange-600 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
        >
          {copied ? '已复制' : '复制反馈内容'}
        </button>
      </div>
    </div>
  );
}