import React, { useState } from 'react';
import { Download, Search, Calendar, Filter } from 'lucide-react';
import { Button, Input, TableHeader, TableRow, TableHead, TableCell, Badge } from '../components/UI';
import { mockCallLogs } from '../services/mockData';

export const HistoryPage: React.FC = () => {
  const [logs] = useState(mockCallLogs);
  const [searchTerm, setSearchTerm] = useState('');
  const [statusFilter, setStatusFilter] = useState<'all' | 'connected' | 'missed'>('all');
  const [sourceFilter, setSourceFilter] = useState<'all' | 'debug' | 'external'>('all');

  const filteredLogs = logs.filter(log => {
    const matchesSearch = log.agentName.toLowerCase().includes(searchTerm.toLowerCase());
    const matchesStatus = statusFilter === 'all' || log.status === statusFilter;
    const matchesSource = sourceFilter === 'all' || log.source === sourceFilter;
    return matchesSearch && matchesStatus && matchesSource;
  });

  const handleExport = () => {
    // Generate CSV content
    const headers = ['ID', 'Agent', 'Source', 'Status', 'Start Time', 'Duration'];
    const rows = filteredLogs.map(log => [
        log.id, 
        log.agentName, 
        log.source, 
        log.status, 
        log.startTime, 
        log.duration
    ].join(','));
    const csvContent = "data:text/csv;charset=utf-8," + [headers.join(','), ...headers.join(',')].join('\n');
    const encodedUri = encodeURI(csvContent);
    const link = document.createElement("a");
    link.setAttribute("href", encodedUri);
    link.setAttribute("download", "history_logs.csv");
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
  };

  return (
    <div className="space-y-6 animate-in fade-in py-4 pb-10">
      <div className="flex items-center justify-between">
        <h1 className="text-2xl font-bold tracking-tight text-white">历史记录</h1>
        <Button variant="outline" onClick={handleExport}>
            <Download className="mr-2 h-4 w-4" /> 导出记录
        </Button>
      </div>

      <div className="grid grid-cols-1 md:grid-cols-4 gap-4 bg-card/50 p-4 rounded-lg border border-white/5 shadow-sm">
         <div className="relative">
             <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
             <Input 
                placeholder="搜索代理小助手..." 
                className="pl-9 border-0 bg-white/5" 
                value={searchTerm} 
                onChange={e => setSearchTerm(e.target.value)}
             />
         </div>
         <div className="flex items-center space-x-2">
            <Filter className="h-4 w-4 text-muted-foreground" />
            <select 
                className="flex h-9 w-full rounded-md border-0 bg-white/5 px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-primary/50 [&>option]:bg-card"
                value={sourceFilter}
                onChange={(e) => setSourceFilter(e.target.value as any)}
            >
                <option value="all">所有来源</option>
                <option value="debug">调试 (Debug)</option>
                <option value="external">外部测试 (External)</option>
            </select>
         </div>
         <div className="flex items-center space-x-2">
            <select 
                className="flex h-9 w-full rounded-md border-0 bg-white/5 px-3 py-1 text-sm shadow-sm transition-colors focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-primary/50 [&>option]:bg-card"
                value={statusFilter}
                onChange={(e) => setStatusFilter(e.target.value as any)}
            >
                <option value="all">所有状态</option>
                <option value="connected">已接通</option>
                <option value="missed">未接通</option>
            </select>
         </div>
         <div className="relative">
            <Calendar className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
            <Input type="date" className="pl-9 border-0 bg-white/5" />
         </div>
      </div>

      <div className="rounded-md border border-white/5 bg-card/40 backdrop-blur-md overflow-hidden">
        <table className="w-full text-sm">
          <TableHeader>
            <TableRow>
              <TableHead>编号</TableHead>
              <TableHead>代理小助手</TableHead>
              <TableHead>来源</TableHead>
              <TableHead>接听状态</TableHead>
              <TableHead>通话接通时间</TableHead>
              <TableHead>通话时长</TableHead>
            </TableRow>
          </TableHeader>
          <tbody>
            {filteredLogs.map(log => (
              <TableRow key={log.id}>
                <TableCell className="font-mono text-xs text-muted-foreground">#{log.id}</TableCell>
                <TableCell className="font-medium text-white">{log.agentName}</TableCell>
                <TableCell>
                    <Badge variant="outline">{log.source === 'debug' ? '调试' : '外部'}</Badge>
                </TableCell>
                <TableCell>
                    <Badge variant={log.status === 'connected' ? 'success' : 'warning'}>
                        {log.status === 'connected' ? '已接通' : '未接通'}
                    </Badge>
                </TableCell>
                <TableCell className="text-muted-foreground">{log.startTime}</TableCell>
                <TableCell className="text-muted-foreground">{log.duration}</TableCell>
              </TableRow>
            ))}
             {filteredLogs.length === 0 && (
                 <TableRow>
                     <TableCell colSpan={6} className="text-center py-6 text-muted-foreground">暂无记录</TableCell>
                 </TableRow>
             )}
          </tbody>
        </table>
      </div>
    </div>
  );
};