'use client';

import React, { useCallback, useEffect, useState } from 'react';
import {
  AlertCircle,
  Bot,
  ChevronDown,
  Loader2,
  Pencil,
  Plus,
  RefreshCw,
  Tags,
  Trash2,
} from 'lucide-react';

import {
  addAgent,
  createSubagent,
  deleteAgent,
  deleteSubagent,
  listAgents,
  listSubagents,
  refreshAgents,
  updateSubagent,
} from '@/lib/api';
import { useChatStore } from '@/lib/store';
import type { UiAgentDescriptor, UiSubagentDescriptor } from '@/types';
import { Badge } from '@/components/ui/badge';
import { Button } from '@/components/ui/button';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Collapsible, CollapsibleContent, CollapsibleTrigger } from '@/components/ui/collapsible';
import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogTrigger } from '@/components/ui/dialog';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import { Switch } from '@/components/ui/switch';
import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
import { Textarea } from '@/components/ui/textarea';
import type { AppLocale } from '@/lib/i18n/core';
import { pickAppText } from '@/lib/i18n/core';
import { useAppI18n } from '@/lib/i18n/provider';

const EMPTY_AGENT_FORM = {
  id: '',
  name: '',
  description: '',
  base_url: '',
  endpoint: '',
  card_url: '',
  auth_env: '',
  auth_mode: 'none',
  auth_audience: '',
  auth_scopes: '',
  tags: '',
  aliases: '',
};

const EMPTY_SUBAGENT_FORM = {
  id: '',
  name: '',
  description: '',
  system_prompt: '',
  model: '',
  delegation_mode: 'remote_a2a_only',
  enabled: true,
  allow_mcp: true,
  tags: '',
  aliases: '',
  metadata_json: '{}',
  mcp_servers_json: '{}',
};

function formatJson(value: Record<string, unknown>): string {
  return JSON.stringify(value, null, 2);
}

function parseJsonObject(raw: string, label: string, locale: AppLocale): Record<string, unknown> {
  const probe = raw.trim();
  if (!probe) {
    return {};
  }
  let parsed: unknown;
  try {
    parsed = JSON.parse(probe);
  } catch {
    throw new Error(`${label} ${pickAppText(locale, '需要是合法 JSON', 'must be valid JSON')}`);
  }
  if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed)) {
    throw new Error(`${label} ${pickAppText(locale, '需要是 JSON 对象', 'must be a JSON object')}`);
  }
  return parsed as Record<string, unknown>;
}

function parseNestedJsonObject(raw: string, label: string, locale: AppLocale): Record<string, Record<string, unknown>> {
  const parsed = parseJsonObject(raw, label, locale);
  for (const [key, value] of Object.entries(parsed)) {
    if (!value || typeof value !== 'object' || Array.isArray(value)) {
      throw new Error(
        pickAppText(
          locale,
          `${label} 中的 ${key} 必须是 JSON 对象`,
          `${key} in ${label} must be a JSON object`
        )
      );
    }
  }
  return parsed as Record<string, Record<string, unknown>>;
}

function agentSourceLabel(source: UiAgentDescriptor['source'], locale: AppLocale): string {
  switch (source) {
    case 'workspace':
      return pickAppText(locale, '工作区', 'Workspace');
    case 'plugin':
      return pickAppText(locale, '插件', 'Plugin');
    case 'skill':
      return pickAppText(locale, '技能', 'Skill');
    default:
      return pickAppText(locale, '内置', 'Built-in');
  }
}

export default function AgentsPage() {
  const { locale } = useAppI18n();
  const t = (zh: string, en: string) => pickAppText(locale, zh, en);
  const cachedAgents = useChatStore((s) => s.agentRegistry);
  const setCachedAgents = useChatStore((s) => s.setAgentRegistry);
  const [agents, setAgents] = useState<UiAgentDescriptor[]>(cachedAgents);
  const [subagents, setSubagents] = useState<UiSubagentDescriptor[]>([]);
  const [loading, setLoading] = useState(cachedAgents.length === 0);
  const [refreshing, setRefreshing] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [agentDialogOpen, setAgentDialogOpen] = useState(false);
  const [subagentDialogOpen, setSubagentDialogOpen] = useState(false);
  const [agentSubmitting, setAgentSubmitting] = useState(false);
  const [subagentSubmitting, setSubagentSubmitting] = useState(false);
  const [agentAdvancedOpen, setAgentAdvancedOpen] = useState(false);
  const [subagentAdvancedOpen, setSubagentAdvancedOpen] = useState(false);
  const [agentForm, setAgentForm] = useState(EMPTY_AGENT_FORM);
  const [subagentForm, setSubagentForm] = useState(EMPTY_SUBAGENT_FORM);
  const [editingSubagentId, setEditingSubagentId] = useState<string | null>(null);

  const load = useCallback(async (background = false) => {
    if (background) {
      setRefreshing(true);
    } else {
      setLoading(true);
    }
    setError(null);
    try {
      const [agentData, subagentData] = await Promise.all([
        listAgents(),
        listSubagents(),
      ]);
      const nextAgents = Array.isArray(agentData) ? agentData : [];
      const nextSubagents = Array.isArray(subagentData) ? subagentData : [];
      setAgents(nextAgents);
      setSubagents(nextSubagents);
      setCachedAgents(nextAgents);
    } catch (err: any) {
      setError(err.message || t('加载智能体失败', 'Failed to load agents'));
    } finally {
      if (background) {
        setRefreshing(false);
      } else {
        setLoading(false);
      }
    }
  }, [setCachedAgents]);

  useEffect(() => {
    void load(cachedAgents.length > 0);
  }, [cachedAgents.length, load]);

  const handleRefresh = async () => {
    setError(null);
    setRefreshing(true);
    try {
      const [agentData, subagentData] = await Promise.all([
        refreshAgents(),
        listSubagents(),
      ]);
      const nextAgents = agentData.agents || [];
      const nextSubagents = Array.isArray(subagentData) ? subagentData : [];
      setAgents(nextAgents);
      setSubagents(nextSubagents);
      setCachedAgents(nextAgents);
    } catch (err: any) {
      setError(err.message || t('刷新智能体失败', 'Failed to refresh agents'));
    } finally {
      setRefreshing(false);
    }
  };

  const handleAgentDialogOpenChange = (open: boolean) => {
    setAgentDialogOpen(open);
    if (!open) {
      setAgentAdvancedOpen(false);
      setAgentForm(EMPTY_AGENT_FORM);
    }
  };

  const handleSubagentDialogOpenChange = (open: boolean) => {
    setSubagentDialogOpen(open);
    if (!open) {
      setSubagentAdvancedOpen(false);
      setEditingSubagentId(null);
      setSubagentForm(EMPTY_SUBAGENT_FORM);
    }
  };

  const handleCreateAgent = async (e: React.FormEvent) => {
    e.preventDefault();
    const hasAddress = [agentForm.base_url, agentForm.endpoint, agentForm.card_url].some((value) => value.trim());
    if (!hasAddress) {
      setError(t('请至少填写 A2A 部署地址、接口地址或卡片地址', 'Enter at least an A2A base URL, endpoint, or card URL'));
      return;
    }
    setAgentSubmitting(true);
    setError(null);
    try {
      await addAgent({
        id: agentForm.id || undefined,
        name: agentForm.name || undefined,
        description: agentForm.description || undefined,
        protocol: 'a2a',
        base_url: agentForm.base_url || undefined,
        endpoint: agentForm.endpoint || undefined,
        card_url: agentForm.card_url || undefined,
        auth_env: agentForm.auth_env || undefined,
        auth_mode: agentForm.auth_mode || 'none',
        auth_audience: agentForm.auth_mode === 'none' ? undefined : agentForm.auth_audience || undefined,
        auth_scopes: agentForm.auth_mode === 'none'
          ? []
          : agentForm.auth_scopes.split(',').map((item) => item.trim()).filter(Boolean),
        tags: agentForm.tags.split(',').map((item) => item.trim()).filter(Boolean),
        aliases: agentForm.aliases.split(',').map((item) => item.trim()).filter(Boolean),
      });
      handleAgentDialogOpenChange(false);
      await load(true);
    } catch (err: any) {
      setError(err.message || t('新增智能体失败', 'Failed to create the agent'));
    } finally {
      setAgentSubmitting(false);
    }
  };

  const handleDeleteAgent = async (agentId: string) => {
    try {
      await deleteAgent(agentId);
      await load(true);
    } catch (err: any) {
      setError(err.message || t('删除智能体失败', 'Failed to delete the agent'));
    }
  };

  const handleEditSubagent = (subagent: UiSubagentDescriptor) => {
    setEditingSubagentId(subagent.id);
    setSubagentForm({
      id: subagent.id,
      name: subagent.name,
      description: subagent.description,
      system_prompt: subagent.system_prompt || '',
      model: subagent.model || '',
      delegation_mode: subagent.delegation_mode || 'remote_a2a_only',
      enabled: subagent.enabled,
      allow_mcp: subagent.allow_mcp,
      tags: (subagent.tags || []).join(', '),
      aliases: (subagent.aliases || []).join(', '),
      metadata_json: formatJson(subagent.metadata || {}),
      mcp_servers_json: formatJson(subagent.mcp_servers || {}),
    });
    setSubagentDialogOpen(true);
  };

  const handleSaveSubagent = async (e: React.FormEvent) => {
    e.preventDefault();
    if (!subagentForm.id.trim()) {
      setError(t('Sub-agent ID 不能为空', 'Sub-agent ID cannot be empty'));
      return;
    }
    setSubagentSubmitting(true);
    setError(null);
    try {
      const payload = {
        id: subagentForm.id.trim(),
        name: subagentForm.name.trim() || subagentForm.id.trim(),
        description: subagentForm.description.trim() || subagentForm.name.trim() || subagentForm.id.trim(),
        system_prompt: subagentForm.system_prompt,
        model: subagentForm.model.trim() || undefined,
        enabled: subagentForm.enabled,
        delegation_mode: subagentForm.delegation_mode,
        allow_mcp: subagentForm.allow_mcp,
        tags: subagentForm.tags.split(',').map((item) => item.trim()).filter(Boolean),
        aliases: subagentForm.aliases.split(',').map((item) => item.trim()).filter(Boolean),
        metadata: parseJsonObject(subagentForm.metadata_json, 'Metadata', locale),
        mcp_servers: parseNestedJsonObject(subagentForm.mcp_servers_json, 'MCP Servers', locale),
      };
      if (editingSubagentId) {
        await updateSubagent(editingSubagentId, payload);
      } else {
        await createSubagent(payload);
      }
      handleSubagentDialogOpenChange(false);
      await load(true);
    } catch (err: any) {
      setError(err.message || t('保存 Sub-Agent 失败', 'Failed to save the sub-agent'));
    } finally {
      setSubagentSubmitting(false);
    }
  };

  const handleDeleteManagedSubagent = async (subagentId: string) => {
    try {
      await deleteSubagent(subagentId);
      await load(true);
    } catch (err: any) {
      setError(err.message || t('删除 Sub-Agent 失败', 'Failed to delete the sub-agent'));
    }
  };

  if (loading) {
    return (
      <div className="flex items-center justify-center py-20">
        <Loader2 className="w-6 h-6 animate-spin text-muted-foreground" />
      </div>
    );
  }

  return (
    <div className="max-w-6xl mx-auto p-6 space-y-6">
      <div className="flex items-center justify-between gap-4 flex-wrap">
        <div>
          <h1 className="text-2xl font-bold flex items-center gap-2">
            <Bot className="w-6 h-6" />
            {t('智能体', 'Agents')}
          </h1>
          <p className="text-sm text-muted-foreground mt-1">
            {t('管理外部 A2A 智能体，以及持久化的本地 Sub-Agent。', 'Manage external A2A agents and persistent local sub-agents.')}
          </p>
        </div>
        <div className="flex items-center gap-2 flex-wrap">
          <Button variant="outline" size="sm" onClick={handleRefresh}>
            <RefreshCw className={`w-4 h-4 mr-2 ${refreshing ? 'animate-spin' : ''}`} />
            {t('刷新', 'Refresh')}
          </Button>
          <Dialog open={agentDialogOpen} onOpenChange={handleAgentDialogOpenChange}>
            <DialogTrigger asChild>
              <Button size="sm" variant="outline">
                <Plus className="w-4 h-4 mr-2" />
                {t('新增智能体', 'Add agent')}
              </Button>
            </DialogTrigger>
            <DialogContent className="sm:max-w-2xl">
              <DialogHeader>
                <DialogTitle>{t('新增工作区智能体', 'Add workspace agent')}</DialogTitle>
              </DialogHeader>
              <form className="space-y-4" onSubmit={handleCreateAgent}>
                <div className="space-y-2">
                  <Label htmlFor="base_url">{t('A2A 部署地址', 'A2A base URL')}</Label>
                  <Input
                    id="base_url"
                    value={agentForm.base_url}
                    onChange={(e) => setAgentForm((s) => ({ ...s, base_url: e.target.value }))}
                    placeholder={t('https://agent.example.com 或 agent.example.com:19090', 'https://agent.example.com or agent.example.com:19090')}
                  />
                  <p className="text-xs text-muted-foreground leading-relaxed">
                    {t('默认只需要填写部署地址。保存时会自动读取', 'Usually the base URL is enough. Save will auto-read')}
                    <code className="mx-1">/.well-known</code>
                    {t('路径并补齐 card 信息。', 'and complete the card metadata.')}
                  </p>
                </div>
                <Collapsible open={agentAdvancedOpen} onOpenChange={setAgentAdvancedOpen}>
                  <CollapsibleTrigger asChild>
                    <Button type="button" variant="outline" className="w-full justify-between">
                      {t('高级设置（可选）', 'Advanced settings (optional)')}
                      <ChevronDown className={`w-4 h-4 transition-transform ${agentAdvancedOpen ? 'rotate-180' : ''}`} />
                    </Button>
                  </CollapsibleTrigger>
                  <CollapsibleContent className="space-y-4 pt-4">
                    <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                      <div className="space-y-2">
                        <Label htmlFor="id">ID</Label>
                        <Input id="id" value={agentForm.id} onChange={(e) => setAgentForm((s) => ({ ...s, id: e.target.value }))} />
                      </div>
                      <div className="space-y-2">
                        <Label htmlFor="name">{t('名称', 'Name')}</Label>
                        <Input id="name" value={agentForm.name} onChange={(e) => setAgentForm((s) => ({ ...s, name: e.target.value }))} />
                      </div>
                    </div>
                    <div className="space-y-2">
                      <Label htmlFor="description">{t('描述', 'Description')}</Label>
                      <Textarea id="description" value={agentForm.description} onChange={(e) => setAgentForm((s) => ({ ...s, description: e.target.value }))} rows={3} />
                    </div>
                    <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                      <div className="space-y-2">
                        <Label htmlFor="endpoint">{t('接口地址', 'Endpoint URL')}</Label>
                        <Input id="endpoint" value={agentForm.endpoint} onChange={(e) => setAgentForm((s) => ({ ...s, endpoint: e.target.value }))} />
                      </div>
                      <div className="space-y-2">
                        <Label htmlFor="card_url">{t('卡片地址', 'Card URL')}</Label>
                        <Input id="card_url" value={agentForm.card_url} onChange={(e) => setAgentForm((s) => ({ ...s, card_url: e.target.value }))} />
                      </div>
                    </div>
                    <div className="grid grid-cols-1 sm:grid-cols-3 gap-4">
                      <div className="space-y-2">
                        <Label htmlFor="auth_mode">{t('鉴权模式', 'Auth mode')}</Label>
                        <select
                          id="auth_mode"
                          value={agentForm.auth_mode}
                          onChange={(e) => setAgentForm((s) => ({ ...s, auth_mode: e.target.value }))}
                          className="flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm"
                        >
                          <option value="none">none</option>
                          <option value="oauth_backend_token">oauth_backend_token</option>
                        </select>
                      </div>
                      <div className="space-y-2">
                        <Label htmlFor="auth_audience">Audience</Label>
                        <Input id="auth_audience" value={agentForm.auth_audience} onChange={(e) => setAgentForm((s) => ({ ...s, auth_audience: e.target.value }))} />
                      </div>
                      <div className="space-y-2">
                        <Label htmlFor="auth_scopes">Scopes</Label>
                        <Input id="auth_scopes" value={agentForm.auth_scopes} onChange={(e) => setAgentForm((s) => ({ ...s, auth_scopes: e.target.value }))} />
                      </div>
                    </div>
                    <div className="space-y-2">
                      <Label htmlFor="auth_env">{t('认证环境变量', 'Credential env var')}</Label>
                      <Input id="auth_env" value={agentForm.auth_env} onChange={(e) => setAgentForm((s) => ({ ...s, auth_env: e.target.value }))} />
                    </div>
                    <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                      <div className="space-y-2">
                        <Label htmlFor="tags">{t('标签', 'Tags')}</Label>
                        <Input id="tags" value={agentForm.tags} onChange={(e) => setAgentForm((s) => ({ ...s, tags: e.target.value }))} />
                      </div>
                      <div className="space-y-2">
                        <Label htmlFor="aliases">{t('别名', 'Aliases')}</Label>
                        <Input id="aliases" value={agentForm.aliases} onChange={(e) => setAgentForm((s) => ({ ...s, aliases: e.target.value }))} />
                      </div>
                    </div>
                  </CollapsibleContent>
                </Collapsible>
                <div className="rounded-md border border-border/70 bg-muted/30 px-3 py-2 text-xs text-muted-foreground">
                  {t(
                    '如果这是持久化本地 Sub-Agent，请改用下面的 Sub-Agent 面板，不要在这里单独删除 registry 记录。',
                    'If this is a persistent local sub-agent, manage it from the sub-agent panel below instead of deleting the registry entry here.'
                  )}
                </div>
                <div className="flex justify-end gap-2">
                  <Button type="button" variant="outline" onClick={() => handleAgentDialogOpenChange(false)}>
                    {t('取消', 'Cancel')}
                  </Button>
                  <Button type="submit" disabled={agentSubmitting}>
                    {agentSubmitting ? <Loader2 className="w-4 h-4 animate-spin mr-2" /> : <Plus className="w-4 h-4 mr-2" />}
                    {t('保存', 'Save')}
                  </Button>
                </div>
              </form>
            </DialogContent>
          </Dialog>
          <Dialog open={subagentDialogOpen} onOpenChange={handleSubagentDialogOpenChange}>
            <DialogTrigger asChild>
              <Button size="sm">
                <Plus className="w-4 h-4 mr-2" />
                {t('新增 Sub-Agent', 'Add sub-agent')}
              </Button>
            </DialogTrigger>
            <DialogContent className="sm:max-w-3xl">
              <DialogHeader>
                <DialogTitle>{editingSubagentId ? t('编辑 Sub-Agent', 'Edit sub-agent') : t('新增 Persistent Sub-Agent', 'Create persistent sub-agent')}</DialogTitle>
              </DialogHeader>
              <form className="space-y-4" onSubmit={handleSaveSubagent}>
                <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                  <div className="space-y-2">
                    <Label htmlFor="subagent_id">ID</Label>
                    <Input
                      id="subagent_id"
                      value={subagentForm.id}
                      disabled={Boolean(editingSubagentId)}
                      onChange={(e) => setSubagentForm((s) => ({ ...s, id: e.target.value }))}
                      placeholder="research-agent"
                    />
                  </div>
                  <div className="space-y-2">
                    <Label htmlFor="subagent_name">{t('名称', 'Name')}</Label>
                    <Input
                      id="subagent_name"
                      value={subagentForm.name}
                      onChange={(e) => setSubagentForm((s) => ({ ...s, name: e.target.value }))}
                      placeholder="Research Agent"
                    />
                  </div>
                </div>
                <div className="space-y-2">
                  <Label htmlFor="subagent_description">{t('描述', 'Description')}</Label>
                  <Textarea
                    id="subagent_description"
                    rows={3}
                    value={subagentForm.description}
                    onChange={(e) => setSubagentForm((s) => ({ ...s, description: e.target.value }))}
                    placeholder={t('用于研究和资料整理的本地持久化子智能体', 'A persistent local sub-agent for research and note taking')}
                  />
                </div>
                <div className="space-y-2">
                  <Label htmlFor="subagent_prompt">System Prompt</Label>
                  <Textarea
                    id="subagent_prompt"
                    rows={6}
                    value={subagentForm.system_prompt}
                    onChange={(e) => setSubagentForm((s) => ({ ...s, system_prompt: e.target.value }))}
                    placeholder="Focus on research tasks, be concise, and cite concrete findings."
                  />
                </div>
                <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                  <div className="space-y-2">
                    <Label htmlFor="subagent_model">{t('模型', 'Model')}</Label>
                    <Input
                      id="subagent_model"
                      value={subagentForm.model}
                      onChange={(e) => setSubagentForm((s) => ({ ...s, model: e.target.value }))}
                      placeholder={t('留空则继承主 Agent 默认模型', 'Leave blank to inherit the lead agent model')}
                    />
                  </div>
                  <div className="space-y-2">
                    <Label htmlFor="delegation_mode">{t('委派模式', 'Delegation mode')}</Label>
                    <select
                      id="delegation_mode"
                      value={subagentForm.delegation_mode}
                      onChange={(e) => setSubagentForm((s) => ({ ...s, delegation_mode: e.target.value }))}
                      className="flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm"
                    >
                      <option value="remote_a2a_only">remote_a2a_only</option>
                      <option value="full">full</option>
                    </select>
                  </div>
                </div>
                <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                  <div className="flex items-center justify-between rounded-md border border-border/70 px-3 py-2">
                    <div>
                      <Label htmlFor="subagent_enabled">{t('启用', 'Enabled')}</Label>
                      <p className="text-xs text-muted-foreground mt-1">{t('关闭后仍保留 workspace 和配置', 'Turning this off keeps the workspace and config intact')}</p>
                    </div>
                    <Switch
                      id="subagent_enabled"
                      checked={subagentForm.enabled}
                      onCheckedChange={(checked) => setSubagentForm((s) => ({ ...s, enabled: checked }))}
                    />
                  </div>
                  <div className="flex items-center justify-between rounded-md border border-border/70 px-3 py-2">
                    <div>
                      <Label htmlFor="subagent_allow_mcp">{t('允许 MCP', 'Allow MCP')}</Label>
                      <p className="text-xs text-muted-foreground mt-1">{t('保留 MCP 配置并在运行时接入', 'Keep MCP config and attach it at runtime')}</p>
                    </div>
                    <Switch
                      id="subagent_allow_mcp"
                      checked={subagentForm.allow_mcp}
                      onCheckedChange={(checked) => setSubagentForm((s) => ({ ...s, allow_mcp: checked }))}
                    />
                  </div>
                </div>
                <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                  <div className="space-y-2">
                    <Label htmlFor="subagent_tags">{t('标签', 'Tags')}</Label>
                    <Input
                      id="subagent_tags"
                      value={subagentForm.tags}
                      onChange={(e) => setSubagentForm((s) => ({ ...s, tags: e.target.value }))}
                      placeholder="research, notes"
                    />
                  </div>
                  <div className="space-y-2">
                    <Label htmlFor="subagent_aliases">{t('别名', 'Aliases')}</Label>
                    <Input
                      id="subagent_aliases"
                      value={subagentForm.aliases}
                      onChange={(e) => setSubagentForm((s) => ({ ...s, aliases: e.target.value }))}
                      placeholder="researcher, local-research"
                    />
                  </div>
                </div>
                <Collapsible open={subagentAdvancedOpen} onOpenChange={setSubagentAdvancedOpen}>
                  <CollapsibleTrigger asChild>
                    <Button type="button" variant="outline" className="w-full justify-between">
                      {t('原始 JSON 设置（Metadata / MCP）', 'Raw JSON settings (Metadata / MCP)')}
                      <ChevronDown className={`w-4 h-4 transition-transform ${subagentAdvancedOpen ? 'rotate-180' : ''}`} />
                    </Button>
                  </CollapsibleTrigger>
                  <CollapsibleContent className="space-y-4 pt-4">
                    <div className="space-y-2">
                      <Label htmlFor="subagent_metadata_json">Metadata JSON</Label>
                      <Textarea
                        id="subagent_metadata_json"
                        rows={6}
                        value={subagentForm.metadata_json}
                        onChange={(e) => setSubagentForm((s) => ({ ...s, metadata_json: e.target.value }))}
                      />
                    </div>
                    <div className="space-y-2">
                      <Label htmlFor="subagent_mcp_json">MCP Servers JSON</Label>
                      <Textarea
                        id="subagent_mcp_json"
                        rows={8}
                        value={subagentForm.mcp_servers_json}
                        onChange={(e) => setSubagentForm((s) => ({ ...s, mcp_servers_json: e.target.value }))}
                      />
                    </div>
                  </CollapsibleContent>
                </Collapsible>
                <div className="rounded-md border border-border/70 bg-muted/30 px-3 py-2 text-xs text-muted-foreground">
                  {t('创建后会自动生成独立 workspace、写入', 'Creating this will generate an isolated workspace and write')}
                  <code className="mx-1">AGENTS.json</code>
                  {t('和', 'and')}
                  <code className="mx-1">AGENTS.md</code>
                  {t('，并注册到工作区智能体列表。', 'and register it in the workspace agent registry.')}
                </div>
                <div className="flex justify-end gap-2">
                  <Button type="button" variant="outline" onClick={() => handleSubagentDialogOpenChange(false)}>
                    {t('取消', 'Cancel')}
                  </Button>
                  <Button type="submit" disabled={subagentSubmitting}>
                    {subagentSubmitting ? <Loader2 className="w-4 h-4 animate-spin mr-2" /> : editingSubagentId ? <Pencil className="w-4 h-4 mr-2" /> : <Plus className="w-4 h-4 mr-2" />}
                    {editingSubagentId ? t('更新', 'Update') : t('创建', 'Create')}
                  </Button>
                </div>
              </form>
            </DialogContent>
          </Dialog>
        </div>
      </div>

      {error && (
        <Card className="border-destructive">
          <CardContent className="pt-6">
            <div className="flex items-center gap-2 text-destructive text-sm">
              <AlertCircle className="w-4 h-4" />
              {error}
            </div>
          </CardContent>
        </Card>
      )}

      <Tabs defaultValue="agents" className="space-y-4">
        <TabsList>
          <TabsTrigger value="agents">{t('委派目标', 'Delegation targets')}</TabsTrigger>
          <TabsTrigger value="subagents">{t('Persistent Sub-Agents', 'Persistent sub-agents')}</TabsTrigger>
        </TabsList>

        <TabsContent value="agents" className="space-y-4">
          <div className="grid grid-cols-1 xl:grid-cols-2 gap-4">
            {agents.map((agent) => {
              const isWorkspace = agent.source === 'workspace';
              const isManagedSubagent = Boolean(agent.metadata && agent.metadata.local_subagent);
              return (
                <Card key={agent.id}>
                  <CardHeader className="pb-3">
                    <div className="flex items-start justify-between gap-4">
                      <div className="min-w-0 flex-1">
                        <CardTitle className="text-base truncate">{agent.name}</CardTitle>
                        <p className="text-xs text-muted-foreground mt-1 font-mono">{agent.id}</p>
                        <p className="text-sm text-muted-foreground mt-2 leading-relaxed">
                          {agent.description || t('暂无描述', 'No description')}
                        </p>
                      </div>
                      <div className="flex items-center gap-2 flex-wrap justify-end">
                        <Badge variant="outline">{agentSourceLabel(agent.source, locale)}</Badge>
                        <Badge variant="secondary">{agent.protocol || t('本地', 'Local')}</Badge>
                        {isManagedSubagent && <Badge className="bg-amber-600">{t('受管 Sub-Agent', 'Managed sub-agent')}</Badge>}
                        {agent.support_streaming && <Badge className="bg-sky-600">{t('流式', 'Streaming')}</Badge>}
                      </div>
                    </div>
                  </CardHeader>
                  <CardContent className="space-y-3 pt-0">
                    <div className="grid grid-cols-1 gap-2 text-xs text-muted-foreground">
                      {agent.base_url && <div><span className="font-medium text-foreground">{t('基础地址：', 'Base URL:')}</span> {agent.base_url}</div>}
                      {agent.endpoint && <div><span className="font-medium text-foreground">{t('接口地址：', 'Endpoint:')}</span> {agent.endpoint}</div>}
                      {agent.card_url && <div><span className="font-medium text-foreground">{t('卡片地址：', 'Card URL:')}</span> {agent.card_url}</div>}
                      {agent.auth_env && <div><span className="font-medium text-foreground">{t('认证变量：', 'Auth env:')}</span> {agent.auth_env}</div>}
                      {agent.auth_mode && agent.auth_mode !== 'none' && <div><span className="font-medium text-foreground">{t('鉴权模式：', 'Auth mode:')}</span> {agent.auth_mode}</div>}
                      {agent.auth_audience && <div><span className="font-medium text-foreground">Audience：</span> {agent.auth_audience}</div>}
                      {(agent.auth_scopes || []).length > 0 && <div><span className="font-medium text-foreground">Scopes：</span> {(agent.auth_scopes || []).join(', ')}</div>}
                    </div>
                    {(agent.tags.length > 0 || agent.aliases.length > 0) && (
                      <div className="space-y-2">
                        {agent.tags.length > 0 && (
                          <div className="flex items-start gap-2 flex-wrap">
                            <Tags className="w-3.5 h-3.5 mt-0.5 text-muted-foreground" />
                            {agent.tags.map((tag) => (
                              <Badge key={tag} variant="outline" className="text-xs">{tag}</Badge>
                            ))}
                          </div>
                        )}
                        {agent.aliases.length > 0 && (
                          <div className="flex items-center gap-2 flex-wrap text-xs text-muted-foreground">
                            <span className="font-medium text-foreground">{t('别名：', 'Aliases:')}</span>
                            {agent.aliases.map((alias) => (
                              <code key={alias} className="px-2 py-0.5 rounded bg-muted">{alias}</code>
                            ))}
                          </div>
                        )}
                      </div>
                    )}
                    <div className="flex justify-end">
                      {isManagedSubagent ? (
                        <span className="text-xs text-muted-foreground">{t('请在 Sub-Agent 面板管理', 'Manage this in the sub-agent panel')}</span>
                      ) : isWorkspace ? (
                        <Button variant="outline" size="sm" onClick={() => handleDeleteAgent(agent.id)}>
                          <Trash2 className="w-4 h-4 mr-2" />
                          {t('删除', 'Delete')}
                        </Button>
                      ) : (
                        <span className="text-xs text-muted-foreground">{t('只读来源', 'Read-only source')}</span>
                      )}
                    </div>
                  </CardContent>
                </Card>
              );
            })}
          </div>
        </TabsContent>

        <TabsContent value="subagents" className="space-y-4">
          <Card className="border-border/70 bg-muted/20">
            <CardContent className="pt-6 text-sm text-muted-foreground leading-relaxed">
              {t('持久化 Sub-Agent 会在', 'Persistent sub-agents keep their own workspace under')}
              <code className="mx-1">~/.beaver/workspace/agents/&lt;id&gt;_agent</code>
              {t('下拥有自己的 workspace、`AGENTS.json`、`AGENTS.md`、skills 和 memory。默认委派模式是', ', plus `AGENTS.json`, `AGENTS.md`, skills, and memory. The default delegation mode is')}
              <code className="mx-1">remote_a2a_only</code>
              {t('，即只能向外委派到远端 A2A agent。', ', which only allows delegation to remote A2A agents.')}
            </CardContent>
          </Card>
          <div className="grid grid-cols-1 xl:grid-cols-2 gap-4">
            {subagents.map((subagent) => (
              <Card key={subagent.id}>
                <CardHeader className="pb-3">
                  <div className="flex items-start justify-between gap-4">
                    <div className="min-w-0 flex-1">
                      <CardTitle className="text-base truncate">{subagent.name}</CardTitle>
                      <p className="text-xs text-muted-foreground mt-1 font-mono">{subagent.id}</p>
                      <p className="text-sm text-muted-foreground mt-2 leading-relaxed">
                        {subagent.description || t('暂无描述', 'No description')}
                      </p>
                    </div>
                    <div className="flex items-center gap-2 flex-wrap justify-end">
                      <Badge variant={subagent.enabled ? 'default' : 'outline'}>
                        {subagent.enabled ? t('启用', 'Enabled') : t('停用', 'Disabled')}
                      </Badge>
                      <Badge variant="secondary">{subagent.delegation_mode}</Badge>
                      {subagent.allow_mcp && <Badge className="bg-sky-600">MCP</Badge>}
                      {subagent.model && <Badge variant="outline">{subagent.model}</Badge>}
                    </div>
                  </div>
                </CardHeader>
                <CardContent className="space-y-3 pt-0">
                  <div className="grid grid-cols-1 gap-2 text-xs text-muted-foreground">
                    <div><span className="font-medium text-foreground">{t('Workspace：', 'Workspace:')}</span> {subagent.workspace}</div>
                    <div><span className="font-medium text-foreground">Base URL：</span> {subagent.base_url}</div>
                    <div><span className="font-medium text-foreground">RPC：</span> {subagent.endpoint}</div>
                    <div><span className="font-medium text-foreground">Card：</span> {subagent.card_url}</div>
                    <div><span className="font-medium text-foreground">{t('MCP Servers：', 'MCP servers:')}</span> {Object.keys(subagent.mcp_servers || {}).length}</div>
                  </div>
                  {subagent.system_prompt && (
                    <div className="rounded-md border border-border/70 bg-muted/30 px-3 py-2">
                      <div className="text-xs font-medium text-foreground mb-1">System Prompt</div>
                      <p className="text-xs text-muted-foreground whitespace-pre-wrap line-clamp-5">
                        {subagent.system_prompt}
                      </p>
                    </div>
                  )}
                  {(subagent.tags.length > 0 || subagent.aliases.length > 0) && (
                    <div className="space-y-2">
                      {subagent.tags.length > 0 && (
                        <div className="flex items-start gap-2 flex-wrap">
                          <Tags className="w-3.5 h-3.5 mt-0.5 text-muted-foreground" />
                          {subagent.tags.map((tag) => (
                            <Badge key={tag} variant="outline" className="text-xs">{tag}</Badge>
                          ))}
                        </div>
                      )}
                      {subagent.aliases.length > 0 && (
                        <div className="flex items-center gap-2 flex-wrap text-xs text-muted-foreground">
                          <span className="font-medium text-foreground">{t('别名：', 'Aliases:')}</span>
                          {subagent.aliases.map((alias) => (
                            <code key={alias} className="px-2 py-0.5 rounded bg-muted">{alias}</code>
                          ))}
                        </div>
                      )}
                    </div>
                  )}
                  <div className="flex justify-end gap-2">
                    <Button variant="outline" size="sm" onClick={() => handleEditSubagent(subagent)}>
                      <Pencil className="w-4 h-4 mr-2" />
                      {t('编辑', 'Edit')}
                    </Button>
                    <Button variant="outline" size="sm" onClick={() => handleDeleteManagedSubagent(subagent.id)}>
                      <Trash2 className="w-4 h-4 mr-2" />
                      {t('删除', 'Delete')}
                    </Button>
                  </div>
                </CardContent>
              </Card>
            ))}
          </div>
          {subagents.length === 0 && (
            <Card>
              <CardContent className="pt-6 text-sm text-muted-foreground">
                {t('还没有持久化 Sub-Agent。点击右上角“新增 Sub-Agent”开始创建。', 'There are no persistent sub-agents yet. Use "Add sub-agent" in the top-right corner to create one.')}
              </CardContent>
            </Card>
          )}
        </TabsContent>
      </Tabs>
    </div>
  );
}
