Agent-System-Frontend/src/components/AgentTracker.tsx

// Sub-agent 追踪弹窗（4.4）：任务树、状态、中间过程（子代理消息树）与结果。
import { useEffect, useState } from 'react'
import { api } from '../api'
import { store, useStore } from '../store'
import { OverlayHost } from '@ui'
import type { Message, Run, Usage } from '../contracts'

export function AgentTracker() {
  const runId = useStore(s => s.ui.trackerRunId)!
  const messagesAll = useStore(s => s.messages)
  const [root, setRoot] = useState<Run | null>(null)
  const [children, setChildren] = useState<Run[]>([])
  const [selected, setSelected] = useState<string | null>(null)

  useEffect(() => {
    api.runDetail(runId).then(d => { setRoot(d.run); setChildren(d.children ?? []) }).catch(() => undefined)
  }, [runId])

  // 中间过程：该会话消息树中归属子代理 run 的消息（run_id 过滤）。
  const subMessages: Record<string, Message[]> = {}
  for (const m of messagesAll) {
    if (m.runId && m.runId !== runId) (subMessages[m.runId] ??= []).push(m)
  }
  const focus = selected ?? children[0]?.id ?? runId
  const focusMsgs = focus === runId ? messagesAll.filter(m => m.runId === runId) : subMessages[focus] ?? []

  return (
    // 阶段③ 收敛：只保留 OverlayHost 一层壳（此前在其内又嵌 .modal 双层窗框）。
    <OverlayHost title="代理追踪" icon="🤖" onClose={() => store.setUI({ trackerRunId: null })}>
      <div className="subagent-tree">
        {!root && <div>加载中…</div>}
        {root && (
          <>
            <div className="subagent-node">
              <div className="head">
                <span className={`status-dot status-${root.status}`} />
                <strong>{root.kind === 'subagent' ? root.agentName || '子代理' : '主任务'}</strong>
                <span style={{ color: 'var(--text-faint)' }}>{root.status}{root.phase ? ` · ${root.phase}` : ''}</span>
                <span className="spacer" style={{ flex: 1 }} />
                <UsageBadge usage={root.usage} />
              </div>
              {children.length > 0 && (
                <div>
                  {children.map(c => (
                    <div key={c.id} className="agent-row" style={{ background: focus === c.id ? 'var(--accent-soft)' : undefined, borderRadius: 6 }}
                      onClick={() => setSelected(c.id)}>
                      <span className={`status-dot status-${c.status}`} />
                      <span style={{ flex: 1 }}>🤖 {c.agentName || c.id}</span>
                      <span style={{ color: 'var(--text-faint)', fontSize: 'var(--fs-ui-xs)' }}>{c.status}</span>
                    </div>
                  ))}
                </div>
              )}
            </div>
            <h5 style={{ margin: '12px 0 6px' }}>中间过程（{focus === runId ? '主任务' : '子代理'}）</h5>
            <div style={{ background: 'var(--bg)', border: '1px solid var(--border)', borderRadius: 8, padding: 12, maxHeight: '40vh', overflowY: 'auto' }}>
              {focusMsgs.length === 0 && <div style={{ color: 'var(--text-faint)', fontSize: 'var(--fs-ui-sm)' }}>（无中间过程消息）</div>}
              {focusMsgs.map(m => (
                <div key={m.id} className="part">
                  {m.parts.map((p, i) => (
                    <div key={i} style={{ whiteSpace: 'pre-wrap', fontSize: 'var(--fs-ui-caption)', lineHeight: 1.7 }}>
                      {p.type === 'text' && p.text}
                      {p.type === 'thinking' && <span style={{ color: 'var(--text-faint)' }}>{p.text}</span>}
                      {p.type === 'tool_call' && <span className="tool-chip">🛠 {p.toolCall?.name}</span>}
                    </div>
                  ))}
                </div>
              ))}
            </div>
          </>
        )}
      </div>
    </OverlayHost>
  )
}

function UsageBadge({ usage }: { usage?: Usage | null }) {
  if (!usage) return null
  return <span className="effect-badge" title="token 用量与时长">
    {usage.totalTokens > 0 ? `${usage.totalTokens} tok · ` : ''}{(usage.durationMs / 1000).toFixed(1)}s{usage.toolCalls > 0 ? ` · ${usage.toolCalls} 工具` : ''}
  </span>
}