import { useState } from 'react';
import { Plus, Search, Edit2, Trash2, Database, Table, Filter, Shield } from 'lucide-react';
import { Card, CardContent } from '@/components/ui/card';
import { dataPermissions } from '@/lib/mock';

export default function DataPermissionPage() {
  const [search, setSearch] = useState('');

  const filtered = dataPermissions.filter(p =>
    !search || p.user.includes(search) || p.instance.includes(search) || p.database.includes(search)
  );

  return (
    <div className="space-y-5">
      <div className="flex items-center justify-between">
        <div>
          <h1 className="text-2xl font-semibold">数据权限</h1>
          <p className="text-sm text-[var(--dg-text-secondary)] mt-1">配置用户对数据库、表、字段的访问权限，支持行级权限控制</p>
        </div>
        <button className="flex items-center gap-2 px-4 py-2.5 bg-gradient-to-r from-blue-500 to-purple-600 rounded-lg text-sm font-medium text-white hover:opacity-90 transition-opacity">
          <Plus className="w-4 h-4" /> 添加权限
        </button>
      </div>

      <div className="grid grid-cols-4 gap-4">
        {[
          { label: '权限规则数', value: dataPermissions.length, icon: Shield, color: 'text-blue-400', bg: 'bg-blue-400/10' },
          { label: '受控用户', value: new Set(dataPermissions.map(p => p.user)).size, icon: Database, color: 'text-purple-400', bg: 'bg-purple-400/10' },
          { label: '受控实例', value: new Set(dataPermissions.map(p => p.instance)).size, icon: Table, color: 'text-green-400', bg: 'bg-green-400/10' },
          { label: '行级过滤规则', value: dataPermissions.filter(p => p.rowFilter).length, icon: Filter, color: 'text-orange-400', bg: 'bg-orange-400/10' },
        ].map((s, i) => (
          <Card key={i} className="dg-card">
            <CardContent className="p-4 flex items-center gap-3">
              <div className={`w-10 h-10 rounded-lg ${s.bg} flex items-center justify-center`}><s.icon className={`w-5 h-5 ${s.color}`} /></div>
              <div><div className="text-2xl font-bold">{s.value}</div><div className="text-xs text-[var(--dg-text-muted)]">{s.label}</div></div>
            </CardContent>
          </Card>
        ))}
      </div>

      <div className="relative max-w-xs">
        <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-[var(--dg-text-muted)]" />
        <input className="w-full pl-10 pr-4 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm placeholder:text-[var(--dg-text-muted)] focus:border-blue-400 focus:outline-none" placeholder="搜索用户/实例/数据库" value={search} onChange={e => setSearch(e.target.value)} />
      </div>

      <Card className="dg-card">
        <CardContent className="p-0">
          <div className="overflow-x-auto">
            <table className="w-full text-sm">
              <thead>
                <tr className="border-b border-[var(--dg-border)] bg-[var(--dg-bg-tertiary)]">
                  <th className="text-left px-5 py-3 font-semibold">用户</th>
                  <th className="text-left px-5 py-3 font-semibold">实例</th>
                  <th className="text-left px-5 py-3 font-semibold">数据库</th>
                  <th className="text-left px-5 py-3 font-semibold">表</th>
                  <th className="text-left px-5 py-3 font-semibold">字段权限</th>
                  <th className="text-left px-5 py-3 font-semibold">行级过滤</th>
                  <th className="text-left px-5 py-3 font-semibold">操作权限</th>
                  <th className="text-left px-5 py-3 font-semibold">操作</th>
                </tr>
              </thead>
              <tbody>
                {filtered.map(p => (
                  <tr key={p.id} className="border-b border-[var(--dg-border-light)] hover:bg-[var(--dg-bg-hover)] transition-colors">
                    <td className="px-5 py-3.5 font-medium">{p.user}</td>
                    <td className="px-5 py-3.5 text-[var(--dg-text-secondary)]">{p.instance}</td>
                    <td className="px-5 py-3.5 text-[var(--dg-text-secondary)]">{p.database}</td>
                    <td className="px-5 py-3.5 text-[var(--dg-text-secondary)]">{p.table}</td>
                    <td className="px-5 py-3.5">
                      {p.columns === '*' ? (
                        <span className="px-2 py-1 bg-green-500/15 text-green-400 text-xs rounded-md">全部字段</span>
                      ) : (
                        <div className="flex flex-wrap gap-1">
                          {p.columns.split(',').map(c => (
                            <span key={c} className="px-2 py-1 bg-[var(--dg-bg-tertiary)] text-[var(--dg-text-secondary)] text-xs rounded-md">{c}</span>
                          ))}
                        </div>
                      )}
                    </td>
                    <td className="px-5 py-3.5">
                      {p.rowFilter ? (
                        <span className="px-2 py-1 bg-yellow-500/15 text-yellow-400 text-xs rounded-md">{p.rowFilter}</span>
                      ) : (
                        <span className="text-[var(--dg-text-muted)]">-</span>
                      )}
                    </td>
                    <td className="px-5 py-3.5">
                      <div className="flex flex-wrap gap-1">
                        {p.operations.map(op => (
                          <span key={op} className="px-2 py-1 bg-blue-500/15 text-blue-400 text-xs rounded-md">{op}</span>
                        ))}
                      </div>
                    </td>
                    <td className="px-5 py-3.5">
                      <div className="flex gap-2">
                        <button className="text-blue-400 hover:text-blue-300"><Edit2 className="w-4 h-4" /></button>
                        <button className="text-red-400 hover:text-red-300"><Trash2 className="w-4 h-4" /></button>
                      </div>
                    </td>
                  </tr>
                ))}
              </tbody>
            </table>
          </div>
        </CardContent>
      </Card>
    </div>
  );
}