import { useState, useMemo } from 'react';
import {
  Plus, Search, Eye, CheckCircle, XCircle, Play, RotateCcw, Copy,
  ChevronRight, Shield, FileCode, History, CircleDot, AlertTriangle,
  Database, Key, Lock, Undo2, Info,
} from 'lucide-react';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { tickets, statusMap, statusColorMap, dbTypeColorMap } from '@/lib/mock';
import { useAuth, useActionPermission } from '@/hooks/useAuth';
import PageHeader from '@/components/PageHeader';
import EmptyState from '@/components/EmptyState';
import type { Ticket } from '@/types';

export default function TicketsPage() {
  const { isDeveloper } = useAuth();
  const canCreate = useActionPermission('ticket.create');
  const canApprove = useActionPermission('ticket.approve');
  const canExecute = useActionPermission('ticket.execute');

  const [search, setSearch] = useState('');
  const [statusFilter, setStatusFilter] = useState('');
  const [dbTypeFilter, setDbTypeFilter] = useState('');
  const [priorityFilter, setPriorityFilter] = useState('');
  const [selectedTicket, setSelectedTicket] = useState<Ticket | null>(null);
  const [showNewTicket, setShowNewTicket] = useState(false);

  const filtered = useMemo(() => {
    return tickets.filter(t => {
      if (statusFilter && t.status !== statusFilter) return false;
      if (dbTypeFilter && t.dbType !== dbTypeFilter) return false;
      if (priorityFilter && t.priority !== priorityFilter) return false;
      if (search && !t.title.includes(search) && !t.id.includes(search) && !t.applicant.includes(search)) return false;
      // developer 只能看到自己的工单
      if (isDeveloper && t.applicant !== '王五' && t.applicant !== 'developer') return false;
      return true;
    });
  }, [search, statusFilter, dbTypeFilter, priorityFilter, isDeveloper]);

  const statusCounts = useMemo(() => {
    const counts: Record<string, number> = {};
    tickets.forEach(t => { counts[t.status] = (counts[t.status] || 0) + 1; });
    return counts;
  }, []);

  if (showNewTicket) {
    return <NewTicketForm onCancel={() => setShowNewTicket(false)} />;
  }

  if (selectedTicket) {
    return <TicketDetail ticket={selectedTicket} onBack={() => setSelectedTicket(null)} canApprove={canApprove} canExecute={canExecute} />;
  }

  return (
    <div className="space-y-5">
      <PageHeader
        title="数据变更工单"
        description="管理 SQL 变更工单，提交审核、查看审批进度"
        action={canCreate ? {
          label: '新建工单', icon: Plus, onClick: () => setShowNewTicket(true), permission: 'ticket.create'
        } : undefined}
      />

      {/* 状态快捷筛选 */}
      <div className="flex gap-2 flex-wrap">
        {[
          { key: 'pending', label: '待审批', count: statusCounts.pending || 0, color: 'text-yellow-400 bg-yellow-400/10 border-yellow-400/20' },
          { key: 'reviewing', label: '审批中', count: statusCounts.reviewing || 0, color: 'text-blue-400 bg-blue-400/10 border-blue-400/20' },
          { key: 'approved', label: '已通过', count: statusCounts.approved || 0, color: 'text-green-400 bg-green-400/10 border-green-400/20' },
          { key: 'executing', label: '执行中', count: statusCounts.executing || 0, color: 'text-purple-400 bg-purple-400/10 border-purple-400/20' },
          { key: 'success', label: '成功', count: statusCounts.success || 0, color: 'text-green-400 bg-green-400/10 border-green-400/20' },
          { key: 'failed', label: '失败', count: statusCounts.failed || 0, color: 'text-red-400 bg-red-400/10 border-red-400/20' },
        ].map(s => (
          <button
            key={s.key}
            onClick={() => setStatusFilter(statusFilter === s.key ? '' : s.key)}
            className={`flex items-center gap-2 px-4 py-2.5 rounded-lg text-sm font-medium border transition-all ${statusFilter === s.key ? s.color : 'bg-[var(--dg-bg-secondary)] border-[var(--dg-border)] text-[var(--dg-text-secondary)] hover:border-[var(--dg-text-muted)]'}`}
          >
            {s.label}
            <span className={`px-1.5 py-0.5 rounded text-xs ${statusFilter === s.key ? 'bg-white/20' : 'bg-[var(--dg-bg-tertiary)]'}`}>{s.count}</span>
          </button>
        ))}
      </div>

      {/* 筛选栏 */}
      <div className="flex items-center gap-3 p-4 dg-card flex-wrap">
        <div className="relative flex-1 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 focus:ring-1 focus:ring-blue-400/20" placeholder="搜索工单标题/编号/申请人" value={search} onChange={e => setSearch(e.target.value)} />
        </div>
        <select className="px-3 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm focus:border-blue-400 focus:outline-none" value={statusFilter} onChange={e => setStatusFilter(e.target.value)}>
          <option value="">全部状态</option>
          {Object.entries(statusMap).map(([k, v]) => <option key={k} value={k}>{v}</option>)}
        </select>
        <select className="px-3 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm focus:border-blue-400 focus:outline-none" value={dbTypeFilter} onChange={e => setDbTypeFilter(e.target.value)}>
          <option value="">全部数据库</option>
          <option value="mysql">MySQL</option>
          <option value="postgres">PostgreSQL</option>
          <option value="redis">Redis</option>
        </select>
        <select className="px-3 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm focus:border-blue-400 focus:outline-none" value={priorityFilter} onChange={e => setPriorityFilter(e.target.value)}>
          <option value="">全部优先级</option>
          <option value="high">高</option>
          <option value="medium">中</option>
          <option value="low">低</option>
        </select>
      </div>

      {/* 工单表格 */}
      <Card className="dg-card">
        <CardContent className="p-0">
          {filtered.length === 0 ? (
            <EmptyState type="search" />
          ) : (
            <>
              <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">工单号</th>
                      <th className="text-left px-5 py-3 font-semibold">标题</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">实例</th>
                      <th className="text-left px-5 py-3 font-semibold">申请人</th>
                      <th className="text-left px-5 py-3 font-semibold">优先级</th>
                      <th className="text-left px-5 py-3 font-semibold">状态</th>
                      <th className="text-left px-5 py-3 font-semibold">创建时间</th>
                      <th className="text-left px-5 py-3 font-semibold">操作</th>
                    </tr>
                  </thead>
                  <tbody>
                    {filtered.map(ticket => (
                      <tr key={ticket.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-mono text-xs text-[var(--dg-text-secondary)]">{ticket.id}</td>
                        <td className="px-5 py-3.5 max-w-xs truncate font-medium">{ticket.title}</td>
                        <td className="px-5 py-3.5"><span className={`inline-flex px-2 py-1 rounded-md text-xs font-medium ${dbTypeColorMap[ticket.dbType] || ''}`}>{ticket.dbType.toUpperCase()}</span></td>
                        <td className="px-5 py-3.5 text-[var(--dg-text-secondary)]">{ticket.instance}</td>
                        <td className="px-5 py-3.5">{ticket.applicant}</td>
                        <td className="px-5 py-3.5">
                          <span className={`inline-flex px-2 py-1 rounded-md text-xs font-medium ${ticket.priority === 'high' ? 'bg-red-500/15 text-red-400' : ticket.priority === 'medium' ? 'bg-yellow-500/15 text-yellow-400' : 'bg-blue-500/15 text-blue-400'}`}>
                            {ticket.priority === 'high' ? '高' : ticket.priority === 'medium' ? '中' : '低'}
                          </span>
                        </td>
                        <td className="px-5 py-3.5">
                          <span className={`inline-flex items-center gap-1.5 px-2.5 py-1 rounded-full text-xs font-medium ${statusColorMap[ticket.status] || ''}`}>
                            <span className={`w-1.5 h-1.5 rounded-full ${ticket.status === 'reviewing' || ticket.status === 'executing' ? 'animate-pulse' : ''}`} />
                            {statusMap[ticket.status]}
                          </span>
                        </td>
                        <td className="px-5 py-3.5 text-[var(--dg-text-secondary)]">{ticket.createTime}</td>
                        <td className="px-5 py-3.5">
                          <div className="flex gap-2">
                            <button onClick={() => setSelectedTicket(ticket)} className="text-blue-400 hover:text-blue-300 transition-colors"><Eye className="w-4 h-4" /></button>
                            {canApprove && ticket.status === 'pending' && <button className="text-green-400 hover:text-green-300 transition-colors"><CheckCircle className="w-4 h-4" /></button>}
                            {canApprove && ticket.status === 'pending' && <button className="text-red-400 hover:text-red-300 transition-colors"><XCircle className="w-4 h-4" /></button>}
                          </div>
                        </td>
                      </tr>
                    ))}
                  </tbody>
                </table>
              </div>
              <div className="flex items-center justify-between px-5 py-4 border-t border-[var(--dg-border)]">
                <span className="text-sm text-[var(--dg-text-muted)]">共 {filtered.length} 条记录</span>
                <div className="flex gap-1">
                  {['上一页', '1', '2', '3', '下一页'].map((p, i) => (
                    <button key={i} className={`px-3 py-1.5 rounded-md text-sm ${i === 1 ? 'bg-blue-500 text-white' : 'text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)]'}`}>{p}</button>
                  ))}
                </div>
              </div>
            </>
          )}
        </CardContent>
      </Card>
    </div>
  );
}

function NewTicketForm({ onCancel }: { onCancel: () => void }) {
  const [sqlTab, setSqlTab] = useState<'change' | 'rollback'>('change');
  const [sql, setSql] = useState('');

  return (
    <div className="space-y-5 max-w-5xl">
      <div className="flex items-center justify-between">
        <h1 className="text-2xl font-semibold">新建数据变更工单</h1>
        <button onClick={onCancel} className="text-[var(--dg-text-secondary)] hover:text-[var(--dg-text-primary)] transition-colors"><XCircle className="w-6 h-6" /></button>
      </div>

      <div className="space-y-4">
        <div>
          <label className="block text-sm font-medium mb-2">工单标题 <span className="text-red-400">*</span></label>
          <input className="w-full px-4 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm focus:border-blue-400 focus:outline-none focus:ring-1 focus:ring-blue-400/20" placeholder="请输入工单标题，如：更新用户状态字段" />
        </div>

        <div className="grid grid-cols-2 gap-4">
          <div>
            <label className="block text-sm font-medium mb-2">数据库类型 <span className="text-red-400">*</span></label>
            <select className="w-full px-4 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm focus:border-blue-400 focus:outline-none">
              <option>MySQL</option><option>PostgreSQL</option><option>Redis</option><option>MongoDB</option>
            </select>
          </div>
          <div>
            <label className="block text-sm font-medium mb-2">目标实例 <span className="text-red-400">*</span></label>
            <select className="w-full px-4 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm focus:border-blue-400 focus:outline-none">
              <option>生产 MySQL 主库</option><option>测试 MySQL 从库</option>
            </select>
          </div>
        </div>

        <div>
          <label className="block text-sm font-medium mb-2">SQL 语句 <span className="text-red-400">*</span></label>
          <div className="dg-card overflow-hidden">
            <div className="flex items-center gap-1 p-2 bg-[var(--dg-bg-tertiary)] border-b border-[var(--dg-border)]">
              <button onClick={() => setSqlTab('change')} className={`flex items-center gap-1.5 px-3 py-1.5 rounded-md text-xs transition-colors ${sqlTab === 'change' ? 'bg-blue-500/15 text-blue-400 border border-blue-500/30' : 'text-[var(--dg-text-secondary)] hover:text-[var(--dg-text-primary)]'}`}>
                <FileCode className="w-3.5 h-3.5" /> 变更 SQL
              </button>
              <button onClick={() => setSqlTab('rollback')} className={`flex items-center gap-1.5 px-3 py-1.5 rounded-md text-xs transition-colors ${sqlTab === 'rollback' ? 'bg-blue-500/15 text-blue-400 border border-blue-500/30' : 'text-[var(--dg-text-secondary)] hover:text-[var(--dg-text-primary)]'}`}>
                <RotateCcw className="w-3.5 h-3.5" /> 回滚 SQL
              </button>
            </div>
            <textarea
              className="w-full min-h-[200px] p-4 bg-[var(--dg-bg-primary)] text-sm font-mono text-[var(--dg-text-primary)] resize-y border-none outline-none placeholder:text-[var(--dg-text-muted)]"
              placeholder={sqlTab === 'change' ? "-- 请输入 SQL 语句，支持多条 SQL，使用分号分隔\n\nUPDATE users SET status = 'active' WHERE id = 1;\nINSERT INTO logs (action, user_id) VALUES ('update', 1);" : "-- 请输入回滚 SQL\n\nUPDATE users SET status = (SELECT status FROM users_backup WHERE id = users.id) WHERE id = 1;"}
              value={sql}
              onChange={e => setSql(e.target.value)}
            />
            <div className="flex items-center justify-between px-4 py-2.5 bg-[var(--dg-bg-tertiary)] border-t border-[var(--dg-border)] text-xs text-[var(--dg-text-muted)]">
              <span><span className="inline-block w-1.5 h-1.5 rounded-full bg-blue-400 mr-1.5" />已输入 {sql.length} 个字符</span>
              <span>Ctrl + Enter 快速提交</span>
            </div>
          </div>
        </div>

        <div>
          <label className="block text-sm font-medium mb-2">变更原因 <span className="text-red-400">*</span></label>
          <textarea className="w-full px-4 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm min-h-[80px] resize-y focus:border-blue-400 focus:outline-none focus:ring-1 focus:ring-blue-400/20 placeholder:text-[var(--dg-text-muted)]" placeholder="请描述本次数据变更的原因和背景，便于审批人理解" />
        </div>

        {/* SQL 审核预览 */}
        <div className="dg-card overflow-hidden">
          <div className="flex items-center justify-between p-4 bg-[var(--dg-bg-tertiary)] border-b border-[var(--dg-border)]">
            <div className="flex items-center gap-2"><Shield className="w-4 h-4 text-blue-400" /><span className="text-sm font-semibold">SQL 审核预览</span></div>
            <div className="flex items-center gap-2 px-3 py-1 bg-green-500/15 rounded-full">
              <CheckCircle className="w-4 h-4 text-green-400" /><span className="text-sm font-semibold text-green-400">92 分</span>
            </div>
          </div>
          <div className="divide-y divide-[var(--dg-border-light)]">
            {[
              { icon: XCircle, color: 'text-red-400 bg-red-400/10', title: '禁止无 WHERE 条件的 UPDATE/DELETE', desc: '检测到 UPDATE 语句缺少 WHERE 条件', suggestion: '建议: 添加 WHERE 条件限制影响范围' },
              { icon: FileCode, color: 'text-yellow-400 bg-yellow-400/10', title: '大表变更警告', desc: '目标表 users 数据量超过 100 万行', suggestion: '建议: 考虑分批执行或使用 pt-online-schema-change' },
              { icon: CheckCircle, color: 'text-green-400 bg-green-400/10', title: 'SQL 语法检查通过', desc: 'SQL 语法正确，可以正常解析' },
            ].map((item, i) => (
              <div key={i} className="flex items-start gap-3 p-4">
                <div className={`w-6 h-6 rounded-full flex items-center justify-center flex-shrink-0 mt-0.5 ${item.color}`}>
                  <item.icon className="w-3.5 h-3.5" />
                </div>
                <div className="flex-1 min-w-0">
                  <div className="text-sm font-medium">{item.title}</div>
                  <div className="text-xs text-[var(--dg-text-secondary)] mt-0.5">{item.desc}</div>
                  {item.suggestion && <div className="text-xs text-blue-400 mt-1">{item.suggestion}</div>}
                </div>
              </div>
            ))}
          </div>
        </div>

        <div className="flex justify-end gap-3 pt-4">
          <button onClick={onCancel} className="px-5 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm font-medium hover:bg-[var(--dg-bg-hover)] transition-colors">取消</button>
          <button className="px-5 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">提交审核</button>
        </div>
      </div>
    </div>
  );
}

function TicketDetail({ ticket, onBack, canApprove, canExecute }: {
  ticket: Ticket; onBack: () => void; canApprove: boolean; canExecute: boolean;
}) {
  return (
    <div className="space-y-5 max-w-5xl">
      <div className="flex items-center justify-between">
        <div className="flex items-center gap-4">
          <button onClick={onBack} className="w-9 h-9 rounded-lg bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] flex items-center justify-center text-[var(--dg-text-secondary)] hover:text-[var(--dg-text-primary)] transition-all">
            <ChevronRight className="w-4 h-4 rotate-180" />
          </button>
          <div>
            <h1 className="text-2xl font-semibold flex items-center gap-3">
              {ticket.title}
              <span className={`px-2.5 py-1 rounded-full text-xs font-medium ${statusColorMap[ticket.status] || ''}`}>{statusMap[ticket.status]}</span>
            </h1>
            <p className="text-sm text-[var(--dg-text-secondary)] mt-1">{ticket.id} · 由 {ticket.applicant} 创建于 {ticket.createTime}</p>
          </div>
        </div>
        <div className="flex gap-2">
          {canApprove && ticket.status === 'pending' && (
            <>
              <button className="flex items-center gap-2 px-4 py-2.5 bg-green-500/15 border border-green-500/30 rounded-lg text-sm font-medium text-green-400 hover:bg-green-500/25 transition-all">
                <CheckCircle className="w-4 h-4" /> 通过
              </button>
              <button className="flex items-center gap-2 px-4 py-2.5 bg-red-500/15 border border-red-500/30 rounded-lg text-sm font-medium text-red-400 hover:bg-red-500/25 transition-all">
                <XCircle className="w-4 h-4" /> 拒绝
              </button>
            </>
          )}
          {canExecute && ticket.status === 'approved' && (
            <button className="flex items-center gap-2 px-4 py-2.5 bg-purple-500/15 border border-purple-500/30 rounded-lg text-sm font-medium text-purple-400 hover:bg-purple-500/25 transition-all">
              <Play className="w-4 h-4" /> 执行
            </button>
          )}
        </div>
      </div>

      {/* 审批流程 */}
      {ticket.workflowSteps && (
        <div className="dg-card p-6">
          <div className="flex items-center justify-between">
            {ticket.workflowSteps.map((step, i) => (
              <div key={i} className="flex items-center flex-1">
                <div className="flex flex-col items-center gap-2">
                  <div className={`w-10 h-10 rounded-full flex items-center justify-center text-white text-sm font-medium ${step.status === 'completed' ? 'bg-green-500' : step.status === 'active' ? 'bg-blue-500 ring-4 ring-blue-500/20' : 'bg-[var(--dg-bg-tertiary)] border-2 border-[var(--dg-border)] text-[var(--dg-text-muted)]'}`}>
                    {step.status === 'completed' ? <CheckCircle className="w-5 h-5" /> : step.status === 'active' ? <CircleDot className="w-5 h-5" /> : <span className="text-xs">{i + 1}</span>}
                  </div>
                  <div className="text-center">
                    <div className="text-xs font-medium whitespace-nowrap">{step.name}</div>
                    <div className="text-[11px] text-[var(--dg-text-muted)]">{step.time || '等待中'}</div>
                  </div>
                </div>
                {i < ticket.workflowSteps!.length - 1 && (
                  <div className={`flex-1 h-[2px] mx-3 mb-6 ${step.status === 'completed' ? 'bg-green-500' : 'bg-[var(--dg-border)]'}`} />
                )}
              </div>
            ))}
          </div>
        </div>
      )}

      <div className="grid grid-cols-2 gap-5">
        {/* 工单信息 */}
        <Card className="dg-card">
          <CardHeader className="border-b border-[var(--dg-border)]"><CardTitle className="text-[15px] font-semibold">工单信息</CardTitle></CardHeader>
          <CardContent className="p-5 space-y-3">
            {[
              { label: '工单号', value: ticket.id },
              { label: '数据库类型', value: <span className={`inline-flex px-2 py-0.5 rounded text-xs font-medium ${dbTypeColorMap[ticket.dbType] || ''}`}>{ticket.dbType.toUpperCase()}</span> },
              { label: '目标实例', value: ticket.instance },
              { label: '申请人', value: ticket.applicant },
              { label: '优先级', value: <span className={`inline-flex px-2 py-0.5 rounded text-xs font-medium ${ticket.priority === 'high' ? 'bg-red-500/15 text-red-400' : ticket.priority === 'medium' ? 'bg-yellow-500/15 text-yellow-400' : 'bg-blue-500/15 text-blue-400'}`}>{ticket.priority === 'high' ? '高' : ticket.priority === 'medium' ? '中' : '低'}</span> },
              { label: '创建时间', value: ticket.createTime },
              { label: '变更原因', value: ticket.reason },
            ].map((item, idx) => (
              <div key={idx} className="flex justify-between py-2 border-b border-[var(--dg-border-light)] last:border-0">
                <span className="text-sm text-[var(--dg-text-secondary)]">{item.label}</span>
                <span className="text-sm font-medium">{item.value}</span>
              </div>
            ))}
          </CardContent>
        </Card>

        {/* SQL 内容 */}
        <Card className="dg-card">
          <CardHeader className="border-b border-[var(--dg-border)]"><CardTitle className="text-[15px] font-semibold flex items-center gap-2"><FileCode className="w-4 h-4 text-blue-400" /> SQL 内容</CardTitle></CardHeader>
          <CardContent className="p-0">
            <pre className="p-5 text-xs font-mono text-[var(--dg-text-primary)] bg-[var(--dg-bg-primary)] overflow-x-auto whitespace-pre-wrap">{ticket.sql}</pre>
          </CardContent>
        </Card>
      </div>

      {/* 回滚 SQL */}
      <Card className="dg-card">
        <CardHeader className="border-b border-[var(--dg-border)]">
          <div className="flex items-center justify-between">
            <CardTitle className="text-[15px] font-semibold flex items-center gap-2"><Undo2 className="w-4 h-4 text-purple-400" /> 回滚 SQL</CardTitle>
            <div className="flex items-center gap-2">
              <span className="px-2 py-0.5 bg-green-500/15 text-green-400 text-xs rounded flex items-center gap-1"><Database className="w-3 h-3" /> Binlog ROW</span>
              <span className="px-2 py-0.5 bg-green-500/15 text-green-400 text-xs rounded flex items-center gap-1"><Key className="w-3 h-3" /> 有主键</span>
              <span className="px-2 py-0.5 bg-blue-500/15 text-blue-400 text-xs rounded">支持回滚</span>
            </div>
          </div>
        </CardHeader>
        <CardContent className="p-0">
          {ticket.rollbackSql ? (
            <div>
              <pre className="p-5 text-xs font-mono text-[var(--dg-text-primary)] bg-[var(--dg-bg-primary)] overflow-x-auto whitespace-pre-wrap">{ticket.rollbackSql}</pre>
              <div className="flex items-center justify-between px-5 py-3 border-t border-[var(--dg-border)]">
                <div className="flex items-center gap-4 text-xs text-[var(--dg-text-muted)]">
                  <span className="flex items-center gap-1"><Info className="w-3 h-3" /> 基于 Binlog ROW 格式解析生成</span>
                  <span className="flex items-center gap-1"><Lock className="w-3 h-3" /> 备份库: backup_mysql_01</span>
                </div>
                <button className="flex items-center gap-1.5 px-3 py-1.5 bg-purple-500/15 text-purple-400 text-xs rounded hover:bg-purple-500/25 transition-colors">
                  <Copy className="w-3 h-3" /> 复制
                </button>
              </div>
            </div>
          ) : (
            <div className="py-8 text-center">
              <AlertTriangle className="w-8 h-8 text-yellow-400 mx-auto mb-3" />
              <div className="text-sm text-[var(--dg-text-secondary)] mb-1">暂无回滚 SQL</div>
              <div className="text-xs text-[var(--dg-text-muted)]">工单执行后将自动生成基于 Binlog 的回滚语句</div>
            </div>
          )}
        </CardContent>
      </Card>

      {/* 回滚限制说明 */}
      <div className="dg-card p-5">
        <div className="flex items-center gap-2 mb-4">
          <AlertTriangle className="w-4 h-4 text-yellow-400" />
          <h3 className="text-sm font-semibold">回滚功能限制说明</h3>
        </div>
        <div className="grid grid-cols-3 gap-4">
          {[
            { icon: Database, title: 'Binlog 配置', status: '已满足', desc: 'MySQL 必须开启 Binlog 且格式为 ROW', color: 'text-green-400 bg-green-400/10' },
            { icon: Key, title: '主键要求', status: '已满足', desc: '操作的表必须包含主键，用于精确定位行', color: 'text-green-400 bg-green-400/10' },
            { icon: Lock, title: '权限要求', status: '已满足', desc: '账号需有 REPLICATION SLAVE/CLIENT 权限', color: 'text-green-400 bg-green-400/10' },
          ].map((item, i) => (
            <div key={i} className="flex items-start gap-3 p-3 rounded-lg bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)]">
              <div className={`w-8 h-8 rounded-lg ${item.color} flex items-center justify-center flex-shrink-0`}>
                <item.icon className="w-4 h-4" />
              </div>
              <div>
                <div className="text-sm font-medium flex items-center gap-2">{item.title}<span className={`text-[11px] ${item.color.split(' ')[0]}`}>{item.status}</span></div>
                <div className="text-xs text-[var(--dg-text-muted)] mt-0.5">{item.desc}</div>
              </div>
            </div>
          ))}
        </div>
        <div className="mt-4 p-3 bg-yellow-500/5 border border-yellow-500/20 rounded-lg">
          <div className="text-xs text-[var(--dg-text-secondary)] flex items-start gap-2">
            <AlertTriangle className="w-3.5 h-3.5 text-yellow-400 flex-shrink-0 mt-0.5" />
            <div>
              <span className="font-medium text-yellow-400">重要提示：</span>
              DDL操作（DROP/TRUNCATE）的回滚支持有限，仅能重建表结构无法恢复数据；
              DML和DDL不可混合执行；WHERE条件可能导致非唯一标识冲突，恢复时务必仔细核对。
              参考 Yearning 2.0 实现：AST语法解析 + Binlog逆向操作。
            </div>
          </div>
        </div>
      </div>

      {/* 审批记录 */}
      {ticket.approvalRecords && (
        <Card className="dg-card">
          <CardHeader className="border-b border-[var(--dg-border)]"><CardTitle className="text-[15px] font-semibold flex items-center gap-2"><History className="w-4 h-4 text-blue-400" /> 审批记录</CardTitle></CardHeader>
          <CardContent className="p-5">
            <div className="relative pl-6 space-y-6">
              <div className="absolute left-[11px] top-2 bottom-2 w-[2px] bg-[var(--dg-border)]" />
              {ticket.approvalRecords.map((record, i) => (
                <div key={i} className="relative">
                  <div className={`absolute -left-6 top-0.5 w-5 h-5 rounded-full flex items-center justify-center ${record.action === 'approve' ? 'bg-green-500' : 'bg-red-500'}`}>
                    {record.action === 'approve' ? <CheckCircle className="w-3 h-3 text-white" /> : <XCircle className="w-3 h-3 text-white" />}
                  </div>
                  <div className="text-sm font-medium">{record.approver} {record.action === 'approve' ? '通过审批' : '拒绝审批'}</div>
                  <div className="text-xs text-[var(--dg-text-muted)]">{record.time}</div>
                  <div className="text-xs text-[var(--dg-text-secondary)] mt-1 p-2 bg-[var(--dg-bg-tertiary)] rounded-lg">{record.comment}</div>
                </div>
              ))}
            </div>
          </CardContent>
        </Card>
      )}
    </div>
  );
}