import { useState } from 'react';
import { 
  Puzzle, Search, Download, RefreshCw, 
  Star, Users, Trash2,
  Zap, Palette, Code, Globe, Database, ShieldCheck
} from 'lucide-react';
import { toast } from 'sonner';
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
import { api } from '@/lib/api';


type TabType = 'installed' | 'available' | 'updates' | 'advanced';

const categoryColors: Record<string, string> = {
  '部署': '#0969da', '构建': '#1a7f37', '主题': '#8250df', '扫描': '#9a6700',
  '安全': '#cf222e', '运维': '#6e7781', '通知': '#bf8700',
};

const iconMap: Record<string, typeof Puzzle> = {
  '部署': Globe, '构建': Code, '主题': Palette, '扫描': ShieldCheck,
  '安全': ShieldCheck, '运维': Database, '通知': Zap, 'general': Puzzle,
};

export default function PluginManager() {
  const [activeTab, setActiveTab] = useState<TabType>('installed');
  const [search, setSearch] = useState('');

  const queryClient = useQueryClient();
  const { data: installed = [] } = useQuery({ queryKey: ['plugins'], queryFn: () => api<any[]>('/api/plugins') });
  const { data: available = [] } = useQuery({ queryKey: ['plugins', 'available'], queryFn: () => api<any[]>('/api/plugins/available') });
  const invalidate = () => queryClient.invalidateQueries({ queryKey: ['plugins'] });

  const installMutation = useMutation({
    mutationFn: (body: any) => api('/api/plugins/install', { method: 'POST', body: JSON.stringify(body) }),
    onSuccess: () => { toast.success('插件安装成功'); invalidate(); },
    onError: (err: Error) => toast.error(err.message),
  });
  const uninstallMutation = useMutation({
    mutationFn: (id: number) => api(`/api/plugins/${id}`, { method: 'DELETE' }),
    onSuccess: () => { toast.success('插件已卸载'); invalidate(); },
    onError: (err: Error) => toast.error(err.message),
  });
  const toggleMutation = useMutation({
    mutationFn: (input: { id: number; enabled: boolean }) =>
      api(`/api/plugins/${input.id}/toggle`, { method: 'POST', body: JSON.stringify({ enabled: input.enabled }) }),
    onSuccess: () => invalidate(),
    onError: (err: Error) => toast.error(err.message),
  });

  const installedPlugins = installed.map((p: any) => ({
    id: String(p.id),
    name: p.name,
    description: p.description || '',
    version: p.version,
    latestVersion: p.latestVersion || p.version,
    author: p.author || 'Unknown',
    installs: p.installs || 0,
    rating: p.rating || null,
    category: p.category || 'general',
    installed: true,
    hasUpdate: p.latestVersion && p.latestVersion !== p.version,
    enabled: p.enabled,
    icon: iconMap[p.category || 'general'] || Puzzle,
  }));

  const availablePlugins = available.map((p: any) => ({
    id: p.pluginId,
    name: p.name,
    description: p.description || '',
    version: p.version,
    latestVersion: p.version,
    author: p.author || 'Unknown',
    installs: p.installs || 0,
    rating: p.rating || null,
    category: p.category || 'general',
    installed: false,
    hasUpdate: false,
    enabled: false,
    icon: iconMap[p.category || 'general'] || Puzzle,
  }));

  const updatePlugins = installedPlugins.filter((p: any) => p.hasUpdate);
  const allPlugins = [...installedPlugins, ...availablePlugins];

  const filteredPlugins = () => {
    const list = activeTab === 'installed' ? installedPlugins : activeTab === 'available' ? availablePlugins : activeTab === 'updates' ? updatePlugins : allPlugins;
    return list.filter((p: any) => p.name.toLowerCase().includes(search.toLowerCase()) || p.description.toLowerCase().includes(search.toLowerCase()));
  };

  const handleInstall = (plugin: any) => {
    installMutation.mutate({
      pluginId: plugin.id,
      name: plugin.name,
      description: plugin.description,
      version: plugin.version,
      author: plugin.author,
      category: plugin.category,
    });
  };

  const handleUninstall = (id: string) => {
    const numId = Number(id);
    if (!isNaN(numId)) uninstallMutation.mutate(numId);
  };

  const handleToggle = (id: string) => {
    const numId = Number(id);
    const plugin = installedPlugins.find((p: any) => p.id === id);
    if (!isNaN(numId) && plugin) {
      toggleMutation.mutate({ id: numId, enabled: !plugin.enabled });
    }
  };

  const tabs: { id: TabType; label: string; count: number }[] = [
    { id: 'installed', label: '已安装', count: installedPlugins.length },
    { id: 'available', label: '可安装', count: availablePlugins.length },
    { id: 'updates', label: '更新', count: updatePlugins.length },
    { id: 'advanced', label: '高级设置', count: 0 },
  ];

  return (
    <div className="h-full flex flex-col" style={{ background: 'var(--canvas-bg)' }}>
      {/* Header */}
      <div className="px-5 py-3 border-b flex items-center justify-between flex-shrink-0" style={{ background: 'var(--panel-bg)', borderColor: 'var(--border-color)' }}>
        <div className="flex items-center gap-3">
          <h1 className="text-[15px] font-semibold" style={{ color: 'var(--text-primary)' }}>插件管理</h1>
          <span className="text-[11px] px-2 py-[2px] rounded-full font-medium" style={{ background: 'var(--panel-bg-secondary)', color: 'var(--text-tertiary)' }}>
            {installedPlugins.length} 已安装 / {availablePlugins.length} 可安装
          </span>
        </div>
        <div className="flex items-center gap-2">
          <div className="flex items-center border rounded-md overflow-hidden" style={{ borderColor: 'var(--border-color-light)' }}>
            <Search className="w-3.5 h-3.5 ml-2.5" style={{ color: 'var(--text-tertiary)' }} />
            <input value={search} onChange={e => setSearch(e.target.value)} placeholder="搜索插件..."
              className="px-2 py-[5px] text-[12px] outline-none w-48" style={{ background: 'transparent', color: 'var(--text-primary)' }} />
          </div>
          <button onClick={() => toast.success('刷新插件列表')} className="flex items-center gap-1 px-3 py-[5px] text-[12px] font-medium rounded-md border" style={{ borderColor: 'var(--border-color-light)', color: 'var(--text-secondary)' }}>
            <RefreshCw className="w-3.5 h-3.5" />刷新
          </button>
        </div>
      </div>

      {/* Tabs */}
      <div className="px-5 pt-3 border-b flex items-center gap-0 flex-shrink-0" style={{ background: 'var(--panel-bg)', borderColor: 'var(--border-color)' }}>
        {tabs.map(tab => (
          <button key={tab.id} onClick={() => setActiveTab(tab.id)}
            className="px-4 py-[8px] text-[13px] font-medium border-b-2 transition-colors"
            style={{ 
              borderColor: activeTab === tab.id ? 'var(--accent-blue)' : 'transparent',
              color: activeTab === tab.id ? 'var(--accent-blue)' : 'var(--text-secondary)',
            }}>
            {tab.label}
            {tab.count > 0 && <span className="ml-1.5 text-[10px] px-1.5 py-[1px] rounded-full font-medium" style={{ background: activeTab === tab.id ? 'var(--accent-blue-light)' : 'var(--panel-bg-secondary)', color: activeTab === tab.id ? 'var(--accent-blue)' : 'var(--text-tertiary)' }}>{tab.count}</span>}
          </button>
        ))}
      </div>

      {/* Content */}
      <div className="flex-1 overflow-y-auto custom-scrollbar p-5">
        {activeTab === 'advanced' ? (
          <div className="max-w-2xl space-y-4">
            <div className="rounded-lg border p-4" style={{ background: 'var(--panel-bg)', borderColor: 'var(--border-color)' }}>
              <h3 className="text-[14px] font-semibold mb-3" style={{ color: 'var(--text-primary)' }}>插件安装源</h3>
              <div className="space-y-2">
                {['https://plugins.opsx.dev/stable', 'https://plugins.opsx.dev/beta', 'https://plugins.opsx.dev/community'].map((url, idx) => (
                  <div key={idx} className="flex items-center justify-between p-2.5 rounded-md border" style={{ borderColor: 'var(--border-color-light)' }}>
                    <div className="flex items-center gap-2">
                      <Globe className="w-4 h-4" style={{ color: 'var(--text-tertiary)' }} />
                      <span className="text-[12px] font-mono" style={{ color: 'var(--text-primary)' }}>{url}</span>
                    </div>
                    <div className="flex items-center gap-2">
                      <span className="text-[10px] px-1.5 py-[1px] rounded font-medium" style={{ background: idx === 0 ? '#dafbe1' : '#fff8c5', color: idx === 0 ? '#1a7f37' : '#9a6700' }}>{idx === 0 ? '默认' : '备用'}</span>
                      <button className="p-1 rounded hover:bg-black/[0.02]" style={{ color: 'var(--text-tertiary)' }}><Trash2 className="w-3.5 h-3.5" /></button>
                    </div>
                  </div>
                ))}
              </div>
              <button onClick={() => toast.info('添加插件源')} className="mt-2 flex items-center gap-1 px-3 py-[5px] text-[12px] font-medium rounded-md border" style={{ borderColor: 'var(--border-color-light)', color: 'var(--text-secondary)' }}>
                <Download className="w-3.5 h-3.5" />添加源
              </button>
            </div>

            <div className="rounded-lg border p-4" style={{ background: 'var(--panel-bg)', borderColor: 'var(--border-color)' }}>
              <h3 className="text-[14px] font-semibold mb-3" style={{ color: 'var(--text-primary)' }}>代理设置</h3>
              <div className="grid grid-cols-2 gap-3">
                <div><label className="block text-[11px] mb-1" style={{ color: 'var(--text-tertiary)' }}>HTTP 代理</label>
                  <input placeholder="http://proxy:8080" className="w-full px-3 py-[6px] text-[12px] rounded-md border outline-none" style={{ background: 'var(--panel-bg-secondary)', borderColor: 'var(--border-color-light)', color: 'var(--text-primary)' }} /></div>
                <div><label className="block text-[11px] mb-1" style={{ color: 'var(--text-tertiary)' }}>HTTPS 代理</label>
                  <input placeholder="https://proxy:8080" className="w-full px-3 py-[6px] text-[12px] rounded-md border outline-none" style={{ background: 'var(--panel-bg-secondary)', borderColor: 'var(--border-color-light)', color: 'var(--text-primary)' }} /></div>
              </div>
            </div>

            <div className="rounded-lg border p-4" style={{ background: 'var(--panel-bg)', borderColor: 'var(--border-color)' }}>
              <h3 className="text-[14px] font-semibold mb-3" style={{ color: 'var(--text-primary)' }}>其他设置</h3>
              <div className="space-y-2">
                <label className="flex items-center gap-2 text-[12px] cursor-pointer">
                  <input type="checkbox" defaultChecked className="w-4 h-4" style={{ accentColor: 'var(--accent-blue)' }} />
                  <span style={{ color: 'var(--text-primary)' }}>安装后自动启用插件</span>
                </label>
                <label className="flex items-center gap-2 text-[12px] cursor-pointer">
                  <input type="checkbox" defaultChecked className="w-4 h-4" style={{ accentColor: 'var(--accent-blue)' }} />
                  <span style={{ color: 'var(--text-primary)' }}>自动检查插件更新</span>
                </label>
                <label className="flex items-center gap-2 text-[12px] cursor-pointer">
                  <input type="checkbox" className="w-4 h-4" style={{ accentColor: 'var(--accent-blue)' }} />
                  <span style={{ color: 'var(--text-primary)' }}>允许安装未签名插件</span>
                </label>
              </div>
            </div>
          </div>
        ) : (
          <div className="space-y-2">
            {filteredPlugins().map(plugin => {
              const Icon = plugin.icon;
              return (
                <div key={plugin.id} className="rounded-lg border p-4" style={{ background: 'var(--panel-bg)', borderColor: 'var(--border-color)' }}>
                  <div className="flex items-start gap-3">
                    <div className="w-10 h-10 rounded-lg flex items-center justify-center flex-shrink-0" style={{ background: 'var(--panel-bg-secondary)' }}>
                      <Icon className="w-5 h-5" style={{ color: 'var(--accent-blue)' }} />
                    </div>
                    <div className="flex-1 min-w-0">
                      <div className="flex items-center gap-2 mb-0.5">
                        <span className="text-[14px] font-semibold" style={{ color: 'var(--text-primary)' }}>{plugin.name}</span>
                        <span className="text-[10px] px-1.5 py-[1px] rounded font-medium" style={{ background: categoryColors[plugin.category] + '15', color: categoryColors[plugin.category] }}>{plugin.category}</span>
                        {plugin.installed && (
                          <span className="text-[10px] px-1.5 py-[1px] rounded font-medium" style={{ background: '#dafbe1', color: '#1a7f37' }}>已安装</span>
                        )}
                      </div>
                      <p className="text-[12px] mb-2" style={{ color: 'var(--text-secondary)' }}>{plugin.description}</p>
                      <div className="flex items-center gap-3 text-[11px]" style={{ color: 'var(--text-tertiary)' }}>
                        {plugin.rating != null && <span className="flex items-center gap-1"><Star className="w-3 h-3" style={{ color: '#9a6700' }} />{plugin.rating}</span>}
                        {plugin.installs > 0 && <span className="flex items-center gap-1"><Users className="w-3 h-3" />{plugin.installs.toLocaleString()} 次安装</span>}
                        <span>作者: {plugin.author}</span>
                        <span className="font-mono">v{plugin.version}</span>
                        {plugin.hasUpdate && <span className="text-[10px] px-1.5 py-[1px] rounded font-medium" style={{ background: '#ddf4ff', color: 'var(--accent-blue)' }}>v{plugin.latestVersion} 可用</span>}
                      </div>
                    </div>
                    <div className="flex items-center gap-1.5 flex-shrink-0">
                      {plugin.installed ? (
                        <>
                          <button onClick={() => handleToggle(plugin.id)}
                            className="px-3 py-[5px] text-[11px] font-medium rounded-md border transition-colors"
                            style={{ borderColor: 'var(--border-color-light)', color: plugin.enabled ? 'var(--accent-blue)' : 'var(--text-tertiary)' }}>
                            {plugin.enabled ? '已启用' : '已禁用'}
                          </button>
                          {plugin.hasUpdate && (
                            <button onClick={() => toast.info('更新插件', { description: `${plugin.name} 将更新到 v${plugin.latestVersion}` })}
                              className="flex items-center gap-1 px-3 py-[5px] text-[11px] font-medium rounded-md text-white" style={{ background: 'var(--accent-blue)' }}>
                              <RefreshCw className="w-3 h-3" />更新
                            </button>
                          )}
                          <button onClick={() => handleUninstall(plugin.id)}
                            className="p-1.5 rounded-md transition-colors hover:bg-black/[0.02]" style={{ color: 'var(--text-tertiary)' }}>
                            <Trash2 className="w-3.5 h-3.5" />
                          </button>
                        </>
                      ) : (
                        <button onClick={() => handleInstall(plugin)}
                          className="flex items-center gap-1 px-3 py-[5px] text-[12px] font-medium rounded-md text-white" style={{ background: 'var(--accent-blue)' }}>
                          <Download className="w-3.5 h-3.5" />安装
                        </button>
                      )}
                    </div>
                  </div>
                </div>
              );
            })}
          </div>
        )}
      </div>
    </div>
  );
}