// YamlViewer.tsx — YAML 查看/编辑器（CodeMirror 6 语法高亮）
// 支持：语法高亮 + 行号 + 基本校验 + 编辑/保存 + 只读字段清理
// 作者: Logan <admin@attacker.club>
import { useState, useEffect, useMemo, useCallback } from 'react';
import { X, Copy, Check, Save, RefreshCw, Loader2, Sparkles } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { useToast } from '@/hooks/use-toast';
import { kubernetesApi } from '@/services/api';
import { cleanYAML } from './k8s-yaml-utils';
import CodeMirror from '@uiw/react-codemirror';
import { yaml } from '@codemirror/lang-yaml';
import { oneDark } from '@codemirror/theme-one-dark';
import { EditorView } from '@codemirror/view';

interface YamlViewerProps {
  clusterCode: string;
  namespace: string;
  resource: string;    // e.g. "deployments", "services"
  name: string;
  onClose: () => void;
  onSaved?: () => void;
  /** 进入编辑模式前是否清理只读/噪音字段（managedFields/uid/status 等） */
  cleanBeforeEdit?: boolean;
  /** 打开即自动进入编辑模式（编辑按钮专用入口） */
  autoEdit?: boolean;
  /** 内联模式（非弹窗）— 用于 YAML 编辑模式 Tab */
  inline?: boolean;
  /** 内联模式下 YAML 内容直接传入 */
  initialYaml?: string;
}

export function YamlViewer({ clusterCode, namespace, resource, name, onClose, onSaved, cleanBeforeEdit = false, autoEdit = false, inline = false, initialYaml }: YamlViewerProps) {
  const { toast } = useToast();
  const [rawYaml, setRawYaml] = useState(initialYaml || '');      // 原始（只读展示用）
  const [editYaml, setEditYaml] = useState('');    // 编辑态（可能被清理过）
  const [loading, setLoading] = useState(!initialYaml);
  const [saving, setSaving] = useState(false);
  const [editing, setEditing] = useState(autoEdit);   // autoEdit → 初始即编辑态
  const [copied, setCopied] = useState(false);
  // autoEdit 时隐式启用清理（编辑入口必须有清理，否则 status/managedFields 会被 K8s 拒绝）
  const effectiveClean = cleanBeforeEdit || autoEdit;

  const loadYaml = async () => {
    if (initialYaml) {
      setRawYaml(initialYaml);
      setEditYaml(effectiveClean ? cleanYAML(initialYaml) : initialYaml);
      setLoading(false);
      return;
    }
    setLoading(true);
    try {
      const text = await kubernetesApi.getResourceYaml(clusterCode, namespace, resource, name);
      setRawYaml(text);
      setEditYaml(effectiveClean ? cleanYAML(text) : text);
    } catch (e: any) {
      toast({ title: '获取YAML失败', description: e.message, variant: 'destructive' });
      const err = `# Error: ${e.message}`;
      setRawYaml(err);
      setEditYaml(err);
    } finally { setLoading(false); }
  };

  const enterEdit = () => {
    const cleaned = effectiveClean ? cleanYAML(rawYaml) : rawYaml;
    setEditYaml(cleaned);
    setEditing(true);
    if (effectiveClean) {
      toast({ title: '已清理只读字段', description: '已剥离 status / managedFields / uid 等' });
    }
  };

  // 视图模式：当 cleanBeforeEdit 时，只读视图也默认展示精简版（剥离 status/managedFields/uid/resourceVersion）
  // 用户可点击「原始」按钮切换回未处理的完整服务端输出
  const [showRaw, setShowRaw] = useState(false);

  const saveYaml = async () => {
    setSaving(true);
    try {
      await kubernetesApi.updateResourceYaml(clusterCode, namespace, resource, name, editYaml);
      toast({ title: 'YAML已应用', description: `${resource}/${name} 更新成功` });
      setEditing(false);
      setRawYaml(editYaml);
      onSaved?.();
    } catch (e: any) {
      toast({ title: '保存失败', description: e.message, variant: 'destructive' });
    } finally { setSaving(false); }
  };

  const copyYaml = async () => {
    const content = editing ? editYaml : rawYaml;
    await navigator.clipboard.writeText(content);
    setCopied(true);
    setTimeout(() => setCopied(false), 2000);
  };

  useEffect(() => { loadYaml(); }, []);

  // 编辑态用 editYaml；只读态根据 effectiveClean + showRaw 决定是否清理
  const display = editing
    ? editYaml
    : (effectiveClean && !showRaw ? cleanYAML(rawYaml) : rawYaml);

  // CodeMirror 主题扩展
  const extensions = useMemo(() => [
    yaml(),
    EditorView.lineWrapping,
    ...(editing ? [] : [EditorView.editable.of(false)]),
  ], [editing]);

  // 内联模式 — 不显示外层弹窗，适合嵌入 Tab 页面
  if (inline) {
    return (
      <div className="space-y-3">
        <div className="flex items-center justify-between">
          <p className="text-xs text-slate-500">
            <code className="text-slate-400">{resource}/{name}</code> · {namespace} · {clusterCode}
          </p>
          <div className="flex items-center gap-2">
            <Button variant="outline" size="sm" className="h-7 border-slate-700 text-slate-300 text-xs" onClick={copyYaml}>
              {copied ? <Check className="h-3 w-3 mr-1 text-emerald-400" /> : <Copy className="h-3 w-3 mr-1" />}
              {copied ? '已复制' : '复制'}
            </Button>
            {effectiveClean && !editing && (
              <Button variant="outline" size="sm" className={`h-7 text-xs ${showRaw ? 'border-slate-700 text-slate-500' : 'border-emerald-700/50 text-emerald-400'}`}
                onClick={() => setShowRaw(v => !v)} title="切换 精简/原始 视图">
                <Sparkles className="h-3 w-3 mr-1" />{showRaw ? '原始' : '精简'}
              </Button>
            )}
            {!editing ? (
              <>
                {effectiveClean && (
                  <Button variant="outline" size="sm" className="h-7 border-slate-700 text-slate-300 text-xs" onClick={enterEdit} title="清理 status / managedFields 等只读字段后编辑">
                  <Sparkles className="h-3 w-3 mr-1 text-amber-400" />编辑
                  </Button>
                )}
                {!effectiveClean && (
                  <Button variant="outline" size="sm" className="h-7 border-slate-700 text-slate-300 text-xs" onClick={() => setEditing(true)}>
                    编辑
                  </Button>
                )}
              </>
            ) : (
              <>
                <Button variant="outline" size="sm" className="h-7 border-slate-700 text-slate-300 text-xs" onClick={() => { setEditing(false); loadYaml(); }}>
                  取消
                </Button>
                <Button size="sm" className="h-7 bg-blue-600 hover:bg-blue-700 text-xs" onClick={saveYaml} disabled={saving}>
                  {saving ? <Loader2 className="h-3 w-3 animate-spin mr-1" /> : <Save className="h-3 w-3 mr-1" />}
                  保存
                </Button>
              </>
            )}
          </div>
        </div>
        <div className="border border-slate-700 rounded-lg overflow-hidden">
          {loading ? (
            <div className="flex items-center justify-center h-96"><Loader2 className="h-6 w-6 animate-spin text-slate-500" /></div>
          ) : (
            <CodeMirror
              value={display}
              height="600px"
              theme={oneDark}
              extensions={extensions}
              onChange={(val) => editing && setEditYaml(val)}
              basicSetup={{
                lineNumbers: true,
                foldGutter: true,
                highlightActiveLine: editing,
                highlightActiveLineGutter: editing,
                autocompletion: true,
                bracketMatching: true,
                closeBrackets: true,
                indentOnInput: true,
              }}
              style={{ fontSize: '12px' }}
            />
          )}
        </div>
      </div>
    );
  }

  // 弹窗模式（原有行为）
  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60" onClick={onClose}>
      <div className="bg-slate-900 border border-slate-700 rounded-xl w-[90vw] max-w-4xl max-h-[85vh] flex flex-col shadow-2xl" onClick={e => e.stopPropagation()}>
        {/* Header */}
        <div className="flex items-center justify-between p-4 border-b border-slate-700">
          <div>
            <h2 className="text-lg font-bold text-slate-100">{resource}/{name}</h2>
            <p className="text-xs text-slate-500">{namespace} · {clusterCode}</p>
          </div>
          <div className="flex items-center gap-2">
            <Button variant="outline" size="sm" className="h-8 border-slate-700 text-slate-300" onClick={copyYaml}>
              {copied ? <Check className="h-3 w-3 mr-1 text-emerald-400" /> : <Copy className="h-3 w-3 mr-1" />}
              {copied ? '已复制' : '复制'}
            </Button>
            {effectiveClean && !editing && (
              <Button variant="outline" size="sm" className={`h-8 text-xs ${showRaw ? 'border-slate-700 text-slate-500' : 'border-emerald-700/50 text-emerald-400'}`}
                onClick={() => setShowRaw(v => !v)} title="切换 精简/原始 视图">
                <Sparkles className="h-3 w-3 mr-1" />{showRaw ? '原始' : '精简'}
              </Button>
            )}
            {!editing ? (
              <>
                {effectiveClean && (
                  <Button variant="outline" size="sm" className="h-8 border-slate-700 text-slate-300" onClick={enterEdit} title="清理 status / managedFields 等只读字段后编辑">
                    <Sparkles className="h-3 w-3 mr-1 text-amber-400" />清理并编辑
                  </Button>
                )}
                {!effectiveClean && (
                  <Button variant="outline" size="sm" className="h-8 border-slate-700 text-slate-300" onClick={() => setEditing(true)}>
                    编辑
                  </Button>
                )}
              </>
            ) : (
              <>
                <Button variant="outline" size="sm" className="h-8 border-slate-700 text-slate-300" onClick={() => { setEditing(false); loadYaml(); }}>
                  取消
                </Button>
                <Button size="sm" className="h-8 bg-blue-600 hover:bg-blue-700" onClick={saveYaml} disabled={saving}>
                  {saving ? <Loader2 className="h-3 w-3 animate-spin mr-1" /> : <Save className="h-3 w-3 mr-1" />}
                  保存
                </Button>
              </>
            )}
            <Button variant="ghost" size="icon" className="h-8 w-8 text-slate-400" onClick={onClose}><X className="h-4 w-4" /></Button>
          </div>
        </div>
        {/* Body */}
        <div className="flex-1 overflow-auto p-4">
          {loading ? (
            <div className="flex items-center justify-center h-full"><Loader2 className="h-6 w-6 animate-spin text-slate-500" /></div>
          ) : (
            <CodeMirror
              value={display}
              height="600px"
              theme={oneDark}
              extensions={extensions}
              onChange={(val) => editing && setEditYaml(val)}
              basicSetup={{
                lineNumbers: true,
                foldGutter: true,
                highlightActiveLine: editing,
                highlightActiveLineGutter: editing,
                autocompletion: true,
                bracketMatching: true,
                closeBrackets: true,
                indentOnInput: true,
              }}
              style={{ fontSize: '12px' }}
            />
          )}
        </div>
      </div>
    </div>
  );
}