// YamlViewer — YAML 查看/编辑（默认精简视图，工具栏：复制 / 编辑 / 保存）// Logan.Li
import { useState, useEffect, useCallback } from 'react';
import { X, Loader2 } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { ModalOverlay } from '@/components/ui/modal-overlay';
import { useToast } from '@/hooks/use-toast';
import { kubernetesApi } from '@/api';
import { parseEditableManifest, parseEditableManifests, prepareYamlForSave } from './k8s-manifest-utils';
import { getYamlResourceConfig, yamlDownloadFilename } from './k8s-yaml-resource-config';
import { YamlEditorToolbar } from './YamlEditorToolbar';
import { YamlCodeMirror } from './YamlCodeMirror';
import { downloadYamlFile } from '@/utils/export';
import type { JsonData } from '@/types/common';

interface YamlViewerProps {
  clusterCode: string;
  namespace: string;
  resource: string;
  name: string;
  onClose: () => void;
  onSaved?: () => void;
  autoEdit?: boolean;
  inline?: boolean;
  initialYaml?: string;
  /** 覆盖资源配置的只读行为（Pod 默认只读）// Logan.Li */
  readOnly?: boolean;
  /** 自定义加载（如 Deployment + Service 多文档）// Logan.Li */
  loadYamlFn?: () => Promise<string>;
  /** 自定义保存（如 Deployment + Service 多文档）// Logan.Li */
  saveYamlFn?: (yaml: string) => Promise<void>;
  /** 资源描述补充（如 "含关联 Service"）// Logan.Li */
  resourceHint?: string;
}

export function YamlViewer({
  clusterCode, namespace, resource, name, onClose, onSaved,
  autoEdit = false, inline = false, initialYaml, readOnly: readOnlyProp,
  loadYamlFn, saveYamlFn, resourceHint,
}: YamlViewerProps) {
  const { toast } = useToast();
  const resCfg = getYamlResourceConfig(resource);
  const readOnly = readOnlyProp ?? resCfg.readOnly;
  const [rawYaml, setRawYaml] = useState(initialYaml || '');
  const [displayYaml, setDisplayYaml] = useState('');
  const [editYaml, setEditYaml] = useState('');
  const [loading, setLoading] = useState(!initialYaml);
  const [saving, setSaving] = useState(false);
  const [editing, setEditing] = useState(autoEdit && !readOnly);
  const [copied, setCopied] = useState(false);
  const [showRaw, setShowRaw] = useState(false);

  const applyStripped = useCallback(async (text: string) => {
    const { yaml: stripped } = text.includes('\n---')
      ? await parseEditableManifests(text)
      : await parseEditableManifest(text);
    setDisplayYaml(stripped);
    setEditYaml(stripped);
    return stripped;
  }, []);

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

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

  const enterEdit = () => {
    setEditYaml(displayYaml);
    setEditing(true);
    setShowRaw(false);
  };

  const cancelEdit = async () => {
    setEditing(false);
    await loadYaml();
  };

  const saveYaml = async () => {
    setSaving(true);
    try {
      const yamlStr = await prepareYamlForSave(editYaml);
      if (saveYamlFn) {
        await saveYamlFn(yamlStr);
      } else {
        await kubernetesApi.updateResourceYaml(clusterCode, namespace, resource, name, yamlStr);
      }
      toast({ title: '保存成功', description: saveYamlFn ? '多文档 YAML 已应用' : `${resource}/${name} 已更新` });
      setEditing(false);
      setRawYaml(yamlStr);
      setDisplayYaml(yamlStr);
      setEditYaml(yamlStr);
      onSaved?.();
    } catch (e) {
      toast({ title: '保存失败', description: (e as Error)?.message || String(e), variant: 'destructive' });
    } finally { setSaving(false); }
  };

  const currentYaml = () => (editing ? editYaml : (showRaw ? rawYaml : displayYaml));

  const copyYaml = async () => {
    await navigator.clipboard.writeText(currentYaml());
    setCopied(true);
    setTimeout(() => setCopied(false), 2000);
  };

  const downloadYaml = () => {
    downloadYamlFile(yamlDownloadFilename(resource, namespace, name), currentYaml());
    toast({ title: '已下载', description: yamlDownloadFilename(resource, namespace, name) });
  };

  const display = editing ? editYaml : (showRaw ? rawYaml : displayYaml);

  const toolbar = (
    <YamlEditorToolbar
      editing={editing}
      saving={saving}
      copied={copied}
      showRaw={showRaw}
      compact={inline}
      readOnly={readOnly}
      onCopy={copyYaml}
      onDownload={downloadYaml}
      onEdit={enterEdit}
      onCancel={cancelEdit}
      onSave={saveYaml}
      onToggleRaw={() => setShowRaw((v) => !v)}
    />
  );

  const editor = loading ? (
    <div className="flex items-center justify-center h-full min-h-[200px]">
      <Loader2 className="h-6 w-6 animate-spin text-slate-500" />
    </div>
  ) : (
    <YamlCodeMirror
      value={display}
      editing={editing}
      fill
      fontSize={inline ? '12px' : '13px'}
      onChange={(val) => editing && setEditYaml(val)}
    />
  );

  if (inline) {
    return (
      <div className="flex flex-col gap-3 min-h-[400px] h-[calc(100vh-220px)] max-h-[720px]">
        <div className="flex items-center justify-between gap-3 flex-wrap shrink-0">
          <p className="text-xs text-slate-500">
            <code className="text-slate-400">{resource}/{name}</code>
            {resourceHint ? <span className="text-slate-600"> · {resourceHint}</span> : null}
            {' · '}{namespace}
          </p>
          {toolbar}
        </div>
        <div className="flex-1 min-h-0 flex flex-col overflow-hidden">{editor}</div>
      </div>
    );
  }

  return (
    <ModalOverlay onClose={onClose}>
      <div
        className="bg-slate-900 border border-slate-700 rounded-xl w-[92vw] max-w-5xl h-[85vh] flex flex-col shadow-2xl"
        onClick={(e) => e.stopPropagation()}
      >
        <div className="flex items-center justify-between p-4 border-b border-slate-700 gap-3 shrink-0">
          <div className="min-w-0 flex-1">
            <h2 className="text-lg font-bold text-slate-100 truncate" title={`${resCfg.label} YAML — ${name}`}>
              {resCfg.label} YAML — {name}
              {readOnly && <span className="ml-2 text-xs font-normal text-slate-500">只读</span>}
            </h2>
            <p className="text-xs text-slate-500 truncate" title={`${namespace} · ${clusterCode}`}>{namespace} · {clusterCode}</p>
          </div>
          <div className="flex items-center gap-2 shrink-0">
            {toolbar}
            <Button variant="ghost" size="icon" className="h-8 w-8 text-slate-400" onClick={onClose}><X className="h-4 w-4" /></Button>
          </div>
        </div>
        <div className="flex-1 min-h-0 flex flex-col overflow-hidden p-4">{editor}</div>
      </div>
    </ModalOverlay>
  );
}