import { useEffect, useMemo, useState } from 'react'
import { ActivityCardView, Collapsible, activitySummary, groupActivityCards, pendingCount, type ActivityCard } from '@ui'
import { store, useStore } from '../store'
import { docBridge } from './Workbench'
import type { WorkCardAction } from '../contracts'
import { WorkExecutionRecord } from './WorkExecutionRecord'

/** 对话与辅助工作栏共享对象、动作和唯一文件预览，不另持有异步状态。 */
export function ConversationWork() {
  const cards = useStore(s => s.cards)
  const conversationId = useStore(s => s.currentConvId)
  const projectId = useStore(s => s.currentProjectId)
  const scratch = useStore(s => !!s.tasks.find(t => t.id === s.currentConvId)?.scratch)
  const messages = useStore(s => s.messages)
  const actionStates = useStore(s => s.cardActionStates)
  const rightCollapsed = useStore(s => s.ui.rightCollapsed)
  const rightTab = useStore(s => s.ui.rightTab)
  const record = useStore(s => s.workRecord)
  const detailHere = rightCollapsed || rightTab !== 'work'
  const [summaryOpen, setSummaryOpen] = useState(detailHere)
  useEffect(() => setSummaryOpen(detailHere), [detailHere])
  const { current, required, focused, history } = useMemo(() => {
    const current = cards.filter(card => card.status !== 'dismissed'
      && card.conversationId === conversationId && card.projectId === projectId)
    const required: ActivityCard[] = []
    const remaining: ActivityCard[] = []
    for (const card of current) {
      // A confirmation already visible at its user message has one main action
      // path in the conversation; assistant-anchored cards still need this path.
      if (card.kind === 'confirm' && card.anchorMessageId
        && messages.some(message => message.role === 'user' && message.id === card.anchorMessageId)) continue
      const summary = activitySummary(card)
      const taskNotice = card.task?.limitations?.length || card.task?.phase.id === 'correction'
        || card.task?.findings?.some(f => f.status === 'active' && (f.kind === 'needs_user' || f.corrects))
      if (taskNotice || card.status === 'action_required' || card.work?.decision?.state === 'open' || summary.failed || (card.status === 'done' && summary.remaining)) required.push(card)
      else remaining.push(card)
    }
    // Preserve the host's newest-first order for completed results and history.
    const results = groupActivityCards(remaining).find(group => group.key === 'results')?.cards ?? []
    const focused = remaining.find(card => card.pinned && card.status === 'active')
      ?? remaining.find(card => card.status === 'active')
      ?? results[0]
    return { current, required, focused, history: remaining.filter(card => card !== focused).sort((a, b) => b.updatedAt.localeCompare(a.updatedAt)) }
  }, [cards, messages, conversationId, projectId])
  if (!detailHere) return null
  if (record) return <div className="conversation-work" data-conversation-work><WorkExecutionRecord /></div>
  if (current.length === 0) return null
  const pending = pendingCount(current)
  const active = current.filter(card => card.status === 'active').length
  const results = current.filter(card => card.status === 'done' || card.status === 'failed').length
  const summary = [pending ? `${pending} 项待处理` : '', active ? `${active} 项工作` : '', results ? `${results} 项结果` : ''].filter(Boolean).join(' · ')
  const callbacks = {
    onAction: (card: ActivityCard, actionId: string, payload?: WorkCardAction) => { void store.cardAction(card, actionId, payload) },
    onOpenRecord: (card: ActivityCard) => store.openWorkRecord(card),
    onReference: (card: ActivityCard) => store.referenceWork(card),
    actionState: (card: ActivityCard) => actionStates?.[card.id],
    onPin: (card: ActivityCard, pinned: boolean) => { void store.cardPin(card, pinned) },
    onDismiss: (card: ActivityCard) => { void store.cardDismiss(card) },
    onLocate: (card: ActivityCard) => { store.locateMessage(card.anchorMessageId) },
    ...(scratch ? {} : { onArchive: (card: ActivityCard) => { void store.cardToProject(card) } }),
  }
  const view = (card: ActivityCard) => <ActivityCardView key={card.id} card={card} callbacks={callbacks} docBridge={docBridge} />

  return (
    <section className="conversation-work" data-conversation-work aria-label="工作进展">
      <div className="conversation-work-heading"><span>工作进展</span><span>{summary || '已处理的工作'}</span></div>
      <div className="conversation-work-current">
        {required.map(view)}
        {focused && <Collapsible id={`conversation-current:${conversationId}:${focused.id}`} open={summaryOpen} onToggle={setSummaryOpen}
          triggerClassName="conversation-work-more" trigger={<><span className="process-collapse-chev">▸</span>{focused.title} · 查看摘要</>}>
          {view(focused)}
        </Collapsible>}
      </div>
      {history.length > 0 && <Collapsible id={`conversation-work:${projectId}:${conversationId}`}
        triggerClassName="conversation-work-more"
        trigger={<><span className="process-collapse-chev">▸</span>更多工作与成果 · {history.length} 项</>}>
        <div className="conversation-work-history">{history.map(view)}</div>
      </Collapsible>}
    </section>
  )
}