aiops/frontend/src/components/kubernetes/KubectlTerminal.tsx

import { useState, useRef, useEffect } from 'react';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogTitle,
} from '@/components/ui/dialog';
import { Button } from '@/components/ui/button';
import { Terminal as XTerm } from 'xterm';
import { FitAddon } from 'xterm-addon-fit';
import 'xterm/css/xterm.css';
import { Terminal, Maximize2, Minimize2, X, Loader2 } from 'lucide-react';
import { cn } from '@/lib/utils';
import { useUserStore } from '@/store';

interface KubectlTerminalProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  clusterId: number | string;
  clusterName: string;
}

export function KubectlTerminal({ open, onOpenChange, clusterId, clusterName }: KubectlTerminalProps) {
  const containerRef = useRef<HTMLDivElement>(null);
  const termRef = useRef<XTerm | null>(null);
  const wsRef = useRef<WebSocket | null>(null);
  const fitRef = useRef<FitAddon | null>(null);
  const [connected, setConnected] = useState(false);
  const [fullscreen, setFullscreen] = useState(false);
  const [error, setError] = useState('');

  // 重置全屏状态
  useEffect(() => {
    if (!open) setFullscreen(false);
  }, [open]);

  // 连接终端
  useEffect(() => {
    if (!open || !clusterId) return;

    const term = new XTerm({
      cursorBlink: true,
      fontSize: 14,
      fontFamily: 'Menlo, Monaco, "Courier New", monospace',
      allowProposedApi: true,
      theme: {
        background: '#0f172a',
        foreground: '#e2e8f0',
        cursor: '#38bdf8',
        selectionBackground: '#1e40af',
        black: '#1e293b', red: '#ef4444', green: '#10b981',
        yellow: '#f59e0b', blue: '#3b82f6', magenta: '#a855f7',
        cyan: '#06b6d4', white: '#e2e8f0',
        brightBlack: '#475569', brightRed: '#f87171', brightGreen: '#34d399',
        brightYellow: '#fbbf24', brightBlue: '#60a5fa', brightMagenta: '#c084fc',
        brightCyan: '#22d3ee', brightWhite: '#f8fafc',
      },
    });
    const fit = new FitAddon();
    term.loadAddon(fit);
    termRef.current = term;
    fitRef.current = fit;

    // WebSocket
    const proto = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
    const baseUrl = import.meta.env.VITE_API_BASE_URL || `${proto}//${window.location.host}`;
    const token = useUserStore.getState().token || '';
    const wsUrl = `${baseUrl.replace(/^http/, 'ws').replace('/api/v1', '')}/ws/kubectl?token=${encodeURIComponent(token)}&id=${clusterId}`;
    const ws = new WebSocket(wsUrl);
    wsRef.current = ws;

    term.onData((data) => {
      if (ws.readyState === WebSocket.OPEN) {
        ws.send(JSON.stringify({ status: 0, data }));
      }
    });

    ws.onmessage = (event) => {
      try {
        const msg = JSON.parse(event.data);
        if (msg.status === 0 && typeof msg.data === 'string') {
          term.write(msg.data);
        }
      } catch {
        if (typeof event.data === 'string') term.write(event.data);
      }
    };

    ws.onopen = () => {
      setConnected(true);
      setError('');
      if (containerRef.current) {
        term.open(containerRef.current);
        requestAnimationFrame(() => {
          try {
            fit.fit();
          } catch { /* noop */ }
        });
        // 延迟 focus：确保 Dialog 渲染完成后再聚焦终端
        setTimeout(() => {
          try {
            term.focus();
          } catch { /* noop */ }
        }, 150);
      }
    };

    ws.onclose = () => {
      setConnected(false);
      term.write('\r\n\x1b[31m[连接已断开]\x1b[0m\r\n');
    };

    ws.onerror = () => {
      setError('WebSocket 连接失败');
      term.write('\r\n\x1b[31m[连接发生错误]\x1b[0m\r\n');
    };

    return () => {
      try {
        if (ws.readyState === WebSocket.OPEN || ws.readyState === WebSocket.CONNECTING) {
          ws.close();
        }
        term.dispose();
      } catch { /* noop */ }
      termRef.current = null;
      wsRef.current = null;
      setConnected(false);
    };
  }, [open, clusterId]);

  // ResizeObserver 监听容器变化自动 fit
  useEffect(() => {
    if (!open) return;
    const container = containerRef.current;
    if (!container) return;

    let resizeTimer: ReturnType<typeof setTimeout>;
    const ro = new ResizeObserver(() => {
      clearTimeout(resizeTimer);
      resizeTimer = setTimeout(() => {
        if (fitRef.current && termRef.current && wsRef.current) {
          try {
            fitRef.current.fit();
            termRef.current.focus();
            const { cols, rows } = termRef.current;
            if (wsRef.current.readyState === WebSocket.OPEN) {
              wsRef.current.send(JSON.stringify({ status: 1, cols, rows }));
            }
          } catch { /* noop */ }
        }
      }, 60);
    });

    ro.observe(container);
    return () => {
      clearTimeout(resizeTimer);
      ro.disconnect();
    };
  }, [open]);

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent
        showCloseButton={false}
        onOpenAutoFocus={(e) => e.preventDefault()}
        className={cn(
          'bg-[var(--dg-bg-secondary)] border-[var(--dg-border)] p-0 gap-0',
          '!duration-0 !transition-none',
          fullscreen
            ? '!max-w-none !w-screen !h-screen !rounded-none !translate-x-0 !translate-y-0 !left-0 !top-0'
            : ''
        )}
        style={fullscreen ? { maxWidth: '100vw', width: '100vw', height: '100vh' } : { maxWidth: '900px', width: '90vw' }}
      >
        <DialogTitle className="sr-only">kubectl — {clusterName}</DialogTitle>
        <DialogDescription className="sr-only">Kubernetes 集群命令行终端</DialogDescription>

        {/* 头部 */}
        <div className="flex items-center justify-between px-4 py-2 border-b border-[var(--dg-border)]">
          <div className="flex items-center gap-2 text-sm">
            <div className={cn('w-2 h-2 rounded-full', connected ? 'bg-emerald-400' : error ? 'bg-red-400' : 'bg-yellow-400')} />
            <Terminal className="h-4 w-4 text-blue-400" />
            <span className="text-[var(--dg-text-primary)] font-medium">kubectl — {clusterName}</span>
            {!connected && !error && <Loader2 className="h-3 w-3 animate-spin text-[var(--dg-text-muted)]" />}
          </div>
          <div className="flex items-center gap-1">
            <button
              onClick={() => setFullscreen(!fullscreen)}
              className="p-1.5 rounded hover:bg-[var(--dg-bg-hover)] text-[var(--dg-text-secondary)]"
            >
              {fullscreen ? <Minimize2 className="h-4 w-4" /> : <Maximize2 className="h-4 w-4" />}
            </button>
            <button
              onClick={() => onOpenChange(false)}
              className="p-1.5 rounded hover:bg-[var(--dg-bg-hover)] text-[var(--dg-text-secondary)]"
            >
              <X className="h-4 w-4" />
            </button>
          </div>
        </div>

        {/* 终端容器 */}
        <div
          ref={containerRef}
          className="bg-[#0f172a]"
          style={{ height: fullscreen ? 'calc(100vh - 49px)' : '480px' }}
        />
      </DialogContent>
    </Dialog>
  );
}