// 终端审计 — 会话命令子面板（筛选 / 虚拟滚动 / 导出） // Logan.Li

import { useMemo, useState, useRef } from 'react';
import { useTranslation } from 'react-i18next';
import { useVirtualizer } from '@tanstack/react-virtual';
import { Card, CardContent } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Search, RefreshCw, Play, FileText } from 'lucide-react';
import { useSessionCommands } from '@/hooks/api';
import { terminalSessionApi, sessionCommandApi } from '@/api';
import { ReplayDialog } from '@/components/system/ReplayDialog';
import { formatCommandOutput, presetAuditRange } from './helpers';
import { isHighRiskCommand } from '@/components/system/replay/replay-utils';
import { exportCommandsListCsv } from '@/components/system/replay/export-audit';
import { unwrapList } from '@/hooks/api/unwrap';
import { cn } from '@/lib/utils';
import { toast } from 'sonner';
import type { SessionCommand } from './types';

const GRID_COLS = 'minmax(150px,1fr) minmax(80px,0.8fr) minmax(200px,2fr) minmax(100px,0.8fr) minmax(80px,0.5fr) 40px';
const PAGE_SIZE = 1000;

export function SessionCommandsPanel() {
  const { t } = useTranslation();
  const [keyword, setKeyword] = useState('');
  const [username, setUsername] = useState('');
  const [sessionIdInput, setSessionIdInput] = useState('');
  const [startDate, setStartDate] = useState('');
  const [endDate, setEndDate] = useState('');
  const [applied, setApplied] = useState({
    keyword: '', username: '', sessionId: '', startDate: '', endDate: '',
  });

  const [replayOpen, setReplayOpen] = useState(false);
  const [replayId, setReplayId] = useState<number | null>(null);
  const [replaySeek, setReplaySeek] = useState<number | undefined>(undefined);
  const [exporting, setExporting] = useState(false);

  const queryParams = useMemo(() => ({
    page: 1,
    page_size: PAGE_SIZE,
    ...(applied.sessionId ? { session_id: Number(applied.sessionId) } : {}),
    ...(applied.username ? { username: applied.username } : {}),
    ...(applied.keyword ? { command: applied.keyword } : {}),
    ...(applied.startDate ? { start_date: applied.startDate } : {}),
    ...(applied.endDate ? { end_date: applied.endDate } : {}),
  }), [applied]);

  const { data, isLoading, refetch } = useSessionCommands(queryParams);
  const commands = data?.list ?? [];
  const total = data?.total ?? 0;

  const applyFilters = () => {
    setApplied({ keyword, username, sessionId: sessionIdInput, startDate, endDate });
  };

  const handleExportCsv = async () => {
    setExporting(true);
    try {
      const resp = await sessionCommandApi.list({
        ...queryParams,
        page: 1,
        page_size: Math.min(Math.max(total, 1), 10000),
      });
      const list = unwrapList<SessionCommand>(resp);
      if (list.length === 0) {
        toast.error(t('audit.terminal.noCommands'));
        return;
      }
      exportCommandsListCsv(list);
    } catch {
      toast.error(t('audit.terminal.exportFailed'));
    } finally {
      setExporting(false);
    }
  };

  // 虚拟滚动
  const scrollRef = useRef<HTMLDivElement>(null);
  const virtualizer = useVirtualizer({
    count: commands.length,
    getScrollElement: () => scrollRef.current,
    estimateSize: () => 48,
    overscan: 10,
  });
  const virtualRows = virtualizer.getVirtualItems();
  const totalHeight = virtualizer.getTotalSize();

  // 从命令行打开回放并跳到该命令时刻（无录制则提示） // Logan.Li
  const openReplayAtCommand = async (cmd: SessionCommand) => {
    if (!cmd.session_record_size) {
      toast.error(t('audit.terminal.replayPlayer.noRecord'));
      return;
    }
    try {
      const sess = await terminalSessionApi.get(cmd.session_id) as { start_time?: string };
      const ts = cmd.timestamp || cmd.created_at;
      let seek: number | undefined;
      if (sess?.start_time && ts) {
        seek = (new Date(ts).getTime() - new Date(sess.start_time).getTime()) / 1000;
        if (seek < 0) seek = 0;
      }
      setReplayId(cmd.session_id);
      setReplaySeek(seek);
      setReplayOpen(true);
    } catch {
      toast.error(t('audit.terminal.replayPlayer.loadFailed'));
    }
  };

  return (
    <>
      <div className="flex items-center gap-2 flex-wrap">
        <div className="relative w-52">
          <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 dg-text-muted" />
          <Input
            placeholder={t('audit.terminal.searchUserCommand')}
            value={keyword}
            onChange={(e) => setKeyword(e.target.value)}
            onKeyDown={(e) => e.key === 'Enter' && applyFilters()}
            className="pl-9 h-9 dg-input"
          />
        </div>
        <Input
          placeholder={t('audit.terminal.filterUsername')}
          value={username}
          onChange={(e) => setUsername(e.target.value)}
          onKeyDown={(e) => e.key === 'Enter' && applyFilters()}
          className="w-28 h-9 dg-input"
        />
        <Input
          placeholder={t('audit.terminal.sessionIdPlaceholder')}
          value={sessionIdInput}
          onChange={(e) => setSessionIdInput(e.target.value)}
          onKeyDown={(e) => e.key === 'Enter' && applyFilters()}
          className="w-32 h-9 dg-input"
        />
        <Input type="date" value={startDate} onChange={(e) => setStartDate(e.target.value)} className="w-36 h-9 dg-input" />
        <span className="dg-text-muted text-sm">—</span>
        <Input type="date" value={endDate} onChange={(e) => setEndDate(e.target.value)} className="w-36 h-9 dg-input" />
        <Button variant="outline" size="sm" className="dg-btn-secondary h-9" onClick={() => { const r = presetAuditRange(1); setStartDate(r.start); setEndDate(r.end); }}>
          {t('audit.terminal.presetToday')}
        </Button>
        <Button variant="outline" size="sm" className="dg-btn-secondary h-9" onClick={() => { const r = presetAuditRange(7); setStartDate(r.start); setEndDate(r.end); }}>
          {t('audit.terminal.preset7d')}
        </Button>
        <Button variant="outline" size="sm" className="dg-btn-secondary h-9" onClick={() => { const r = presetAuditRange(30); setStartDate(r.start); setEndDate(r.end); }}>
          {t('audit.terminal.preset30d')}
        </Button>
        <Button size="sm" className="h-9" onClick={applyFilters}>{t('audit.terminal.applyFilter')}</Button>
        <Button
          variant="outline"
          className="dg-btn-secondary h-9"
          onClick={() => refetch()}
        >
          <RefreshCw className="h-4 w-4 mr-2" />
          {t('common.refresh')}
        </Button>
        <Button
          variant="outline"
          className="dg-btn-secondary hover:text-[var(--dg-orange)] h-9"
          onClick={handleExportCsv}
          disabled={exporting || total === 0}
          title={t('audit.terminal.exportCommandsCsv')}
        >
          <FileText className="h-4 w-4 mr-2" />
          {t('audit.terminal.exportCommands')}
        </Button>
      </div>

      <Card className="dg-card">
        <CardContent className="p-0">
          <div className="border-t border-[var(--dg-border)]">
            {isLoading ? (
              <div className="flex items-center justify-center py-16">
                <div className="w-8 h-8 border-2 border-blue-500 border-t-transparent rounded-full animate-spin" />
              </div>
            ) : commands.length === 0 ? (
              <div className="flex flex-col items-center justify-center py-16 dg-text-muted">
                <Search className="h-8 w-8 mb-3 opacity-40" />
                <p className="text-sm">{t('audit.terminal.noCommands')}</p>
              </div>
            ) : (
              <>
                <div
                  className="grid gap-2 px-4 py-2 border-b border-[var(--dg-border)] bg-[var(--dg-bg-secondary)] text-xs font-medium dg-text-secondary"
                  style={{ gridTemplateColumns: GRID_COLS }}
                >
                  <span>{t('audit.terminal.col.startTime')}</span>
                  <span>{t('audit.terminal.col.user')}</span>
                  <span>{t('audit.terminal.col.command')}</span>
                  <span>{t('audit.terminal.col.outputSize')}</span>
                  <span>{t('audit.terminal.col.sessionRef')}</span>
                  <span />
                </div>

                <div ref={scrollRef} style={{ height: 'min(600px, calc(100vh - 340px))', overflow: 'auto' }}>
                  <div style={{ height: totalHeight, position: 'relative' }}>
                    {virtualRows.map((vr) => {
                      const c = commands[vr.index];
                      if (!c) return null;
                      return (
                        <div
                          key={c.id}
                          data-index={vr.index}
                          ref={virtualizer.measureElement}
                          style={{
                            position: 'absolute',
                            top: 0,
                            left: 0,
                            width: '100%',
                            transform: `translateY(${vr.start}px)`,
                            display: 'grid',
                            gridTemplateColumns: GRID_COLS,
                            gap: '0.5rem',
                          }}
                          className="px-4 py-2.5 border-b border-[var(--dg-border)] hover:bg-[var(--dg-bg-hover)]"
                        >
                          <span className="text-sm dg-text-secondary truncate">
                            {c.created_at ? new Date(c.created_at).toLocaleString() : '--'}
                          </span>
                          <span className="text-sm text-[var(--dg-text-primary)] truncate">{c.username || '--'}</span>
                          <code className={cn(
                            'text-xs bg-[var(--dg-bg-tertiary)] px-2 py-0.5 rounded max-w-[400px] truncate block',
                            isHighRiskCommand(c.command || '') ? 'dg-text-red' : 'text-[var(--dg-text-secondary)]',
                          )}>
                            {c.command || '--'}
                          </code>
                          <span className="text-sm dg-text-secondary">{formatCommandOutput(c.output_size)}</span>
                          <span className={cn(
                            'text-xs',
                            c.session_record_size ? 'dg-text-muted' : 'text-amber-500/80',
                          )} title={!c.session_record_size ? t('audit.terminal.replayPlayer.noRecord') : undefined}>
                            #{c.session_id}
                          </span>
                          <Button
                            variant="ghost"
                            size="icon"
                            className="h-7 w-7 dg-text-secondary hover:dg-text-blue disabled:opacity-30"
                            onClick={() => openReplayAtCommand(c)}
                            disabled={!c.session_record_size}
                            title={c.session_record_size
                              ? t('audit.terminal.replayAtCommand')
                              : t('audit.terminal.replayPlayer.noRecord')}
                          >
                            <Play className="h-3.5 w-3.5" />
                          </Button>
                        </div>
                      );
                    })}
                  </div>
                </div>

                <div className="text-center py-2 text-xs dg-text-muted border-t border-[var(--dg-border)]">
                  {t('audit.terminal.totalCommands', { count: total })}
                  {commands.length < total && ` · ${t('audit.terminal.showingLoaded', { loaded: commands.length })}`}
                  {commands.length > 200 && ` · ${t('audit.terminal.virtualScroll')}`}
                </div>
              </>
            )}
          </div>
        </CardContent>
      </Card>

      <ReplayDialog
        open={replayOpen}
        onOpenChange={setReplayOpen}
        sessionId={replayId}
        initialSeekSec={replaySeek}
      />
    </>
  );
}