// EventTable — K8s 事件列表（时间/次数/类型/原因/对象/来源/消息）// Logan.Li
// v2: 虚拟滚动，移除 maxRows 限制，支持万级事件流畅渲染
import { useState, useRef } from 'react';
import { useVirtualizer } from '@tanstack/react-virtual';
import { Badge } from '@/components/ui/badge';
import { Loader2 } from 'lucide-react';
import {
  type NormalizedEvent,
  formatEventRepeatSpan,
  formatEventTimeCell,
} from './k8s-event-utils';

interface EventTableProps {
  events: NormalizedEvent[];
  loading?: boolean | string;
  emptyText?: string;
  /** @deprecated 虚拟滚动后不再需要截断，保留参数向后兼容但忽略 */
  maxRows?: number;
  showNamespace?: boolean;
  /** 虚拟滚动容器高度 */
  scrollHeight?: number;
}

const ROW_HEIGHT = 52;
const COLS_NS = '148px 148px 64px 80px 80px 112px minmax(120px,1fr) 96px 112px minmax(200px,1.5fr)';
const COLS = '148px 148px 64px 80px 80px 112px minmax(120px,1fr) 112px minmax(200px,1.5fr)';
const MIN_W_NS = '1080px';
const MIN_W = '980px';

export function EventTable({
  events,
  loading = false,
  emptyText = '暂无事件',
  showNamespace = false,
  scrollHeight = 600,
}: EventTableProps) {
  const [expandedRow, setExpandedRow] = useState<string | null>(null);
  const isLoading = loading === true || loading === 'events';
  const scrollRef = useRef<HTMLDivElement>(null);

  const gridCols = showNamespace ? COLS_NS : COLS;
  const minWidth = showNamespace ? MIN_W_NS : MIN_W;
  const headers = showNamespace
    ? ['最后时间', '首次时间', '次数', '重复', '类型', '原因', '对象', '命名空间', '来源', '消息']
    : ['最后时间', '首次时间', '次数', '重复', '类型', '原因', '对象', '来源', '消息'];

  const virtualizer = useVirtualizer({
    count: events.length,
    getScrollElement: () => scrollRef.current,
    estimateSize: () => ROW_HEIGHT,
    overscan: 10,
  });

  const virtualRows = virtualizer.getVirtualItems();
  const totalHeight = virtualizer.getTotalSize();

  return (
    <div>
      {/* 表头 — sticky 固定 */}
      <div
        className="grid gap-2 px-4 py-2.5 border-b border-[var(--dg-border)] bg-[var(--dg-bg-secondary)] text-[11px] font-medium text-[var(--dg-text-muted)] uppercase tracking-wide"
        style={{ gridTemplateColumns: gridCols, minWidth }}
      >
        {headers.map((h, i) => (
          <span key={i} className={i === 2 ? 'text-center' : ''}>{h}</span>
        ))}
      </div>

      {/* 虚拟滚动体 */}
      <div ref={scrollRef} style={{ height: scrollHeight, overflow: 'auto' }} className="overflow-x-auto">
        {isLoading ? (
          <div className="flex items-center justify-center" style={{ height: scrollHeight }}>
            <Loader2 className="h-5 w-5 animate-spin text-[var(--dg-text-muted)]" />
          </div>
        ) : events.length === 0 ? (
          <div className="flex items-center justify-center text-[var(--dg-text-muted)] py-10">{emptyText}</div>
        ) : (
          <div style={{ height: totalHeight, position: 'relative', minWidth }}>
            {virtualRows.map((vr) => {
              const e = events[vr.index];
              if (!e) return null;
              const rowKey = `${e.name || e.object}-${vr.index}`;
              const isExpanded = expandedRow === rowKey;
              const isWarning = e.type === 'Warning';
              const last = formatEventTimeCell(e.lastTime);
              const first = formatEventTimeCell(e.firstTime);

              return (
                <div
                  key={vr.key}
                  data-index={vr.index}
                  ref={virtualizer.measureElement}
                  style={{
                    position: 'absolute',
                    top: 0,
                    left: 0,
                    width: '100%',
                    transform: `translateY(${vr.start}px)`,
                    display: 'grid',
                    gridTemplateColumns: gridCols,
                    gap: '0.5rem',
                  }}
                  className={`px-4 py-2.5 border-b border-[var(--dg-border)] cursor-pointer transition-colors ${
                    isExpanded ? 'bg-[var(--dg-bg-tertiary)]/40' : 'hover:bg-[var(--dg-bg-tertiary)]/30'
                  }`}
                  onClick={() => setExpandedRow(isExpanded ? null : rowKey)}
                >
                  {/* 最后时间 */}
                  <div className="text-xs text-[var(--dg-text-muted)]">
                    <div>{last.absolute}</div>
                    <div className="text-[10px]">{last.relative}</div>
                  </div>
                  {/* 首次时间 */}
                  <div className="text-xs text-[var(--dg-text-muted)]">
                    <div>{first.absolute}</div>
                    <div className="text-[10px]">{first.relative}</div>
                  </div>
                  {/* 次数 */}
                  <div className="text-sm text-center tabular-nums text-[var(--dg-text-secondary)]">{e.count}</div>
                  {/* 重复跨度 */}
                  <div className="text-xs text-[var(--dg-text-muted)]">{formatEventRepeatSpan(e.firstTime, e.lastTime, e.count)}</div>
                  {/* 类型 */}
                  <div>
                    <Badge
                      variant="outline"
                      className={isWarning
                        ? 'text-[var(--dg-warning)] border-[var(--dg-warning)]/30 text-[10px]'
                        : 'text-[var(--dg-text-muted)] border-[var(--dg-border)] text-[10px]'}
                    >
                      {e.type}
                    </Badge>
                  </div>
                  {/* 原因 */}
                  <div className="text-xs font-medium text-[var(--dg-text-secondary)]">{e.reason}</div>
                  {/* 对象 */}
                  <div className="text-xs font-mono text-[var(--dg-text-muted)] truncate">
                    {e.objectKind ? (
                      <span><span className="text-[var(--dg-text-secondary)]">{e.objectKind}</span>/{e.objectName || e.object.split('/').pop()}</span>
                    ) : e.object}
                  </div>
                  {/* 命名空间（可选） */}
                  {showNamespace && <div className="text-xs text-[var(--dg-text-muted)]">{e.namespace || '-'}</div>}
                  {/* 来源 */}
                  <div className="text-xs text-[var(--dg-text-muted)] font-mono">{e.source}</div>
                  {/* 消息 */}
                  <div className="text-xs text-[var(--dg-text-secondary)] max-w-[360px]">
                    <div className={isExpanded ? 'whitespace-normal break-words' : 'truncate'} title={!isExpanded ? e.message : undefined}>
                      {e.message}
                    </div>
                    {isExpanded && e.name && (
                      <div className="mt-1 pt-1 border-t border-[var(--dg-border)] text-[10px] text-[var(--dg-text-muted)]">
                        事件名: {e.name}
                      </div>
                    )}
                  </div>
                </div>
              );
            })}
          </div>
        )}
      </div>

      {/* 行数统计 */}
      {events.length > 0 && (
        <div className="text-center py-2 text-xs text-[var(--dg-text-muted)] border-t border-[var(--dg-border)]">
          共 {events.length} 条事件 {events.length > 500 && '· 虚拟滚动渲染'}
        </div>
      )}
    </div>
  );
}