import { ArrowUpRight, Loader2, X } from 'lucide-react';
import type { Ref } from 'react';
import { TeacherAvatar } from './TeacherAvatar';
import type { useTeacherCompanion } from './use-teacher-companion';

type Companion = ReturnType<typeof useTeacherCompanion>;
export function TeacherCompanion({ companion, open, onOpen, bubbleRef }: {
  companion: Companion;
  open: boolean;
  onOpen(agentId?: string): void;
  bubbleRef?: Ref<HTMLDivElement>;
}) {
  const { definition, invitation, welcome, loading, enabled, checking, error } = companion;
  const name = definition?.name || '智能体';
  const activeId = companion.selectedAgent?.teacher_id;
  const agents = companion.selectedAgent && !companion.agents.some((item) => item.teacher_id === activeId)
    ? [...companion.agents, companion.selectedAgent] : companion.agents;
  const viewConversation = () => { companion.dismiss(); onOpen(); };
  const status = loading ? '正在连接智能体…'
    : checking ? '智能体在看看你最近的进展…'
    : error || (!enabled ? '智能体暂未开放，仍可查看以往讨论' : open ? '我们慢慢聊，想到什么都可以说' : '点我聊聊，想到什么都可以说');
  return (
    <section className="teacher-companion no-drag" aria-label="智能体陪伴" data-testid="teacher-companion">
      <nav className="consultation-agent-tabs" aria-label="已下发智能体">
      {agents.map((agent) => <button key={agent.teacher_id} type="button" className="teacher-companion-person"
        title={agent.definition.description || agent.definition.name} aria-label={agents.length === 1 ? '智能体' : `与${agent.definition.name}聊天`}
        aria-expanded={open && activeId === agent.teacher_id} aria-pressed={open && activeId === agent.teacher_id}
        aria-controls="coding-consultation-dock" data-agent-id={agent.teacher_id}
        onMouseDown={(event) => event.preventDefault()} onClick={() => onOpen(agent.teacher_id)}>
        <span className="teacher-companion-avatar"><TeacherAvatar definition={agent.definition} />
          {activeId === agent.teacher_id && invitation && <span className="teacher-companion-unread" aria-hidden="true" />}</span>
        <span className="teacher-companion-name">{agent.definition.name}</span>
        {activeId === agent.teacher_id && checking && <Loader2 className="h-3 w-3 shrink-0 animate-spin text-muted-foreground motion-reduce:animate-none" aria-label="智能体正在思考" />}
      </button>)}
      {(!agents.length || (!activeId && companion.topic)) && <button type="button" className="teacher-companion-person" title={status} aria-label="智能体" aria-expanded={open} aria-controls="coding-consultation-dock" onMouseDown={(event) => event.preventDefault()} onClick={() => onOpen()}>
        <span className="teacher-companion-avatar"><TeacherAvatar definition={definition} />{invitation && <span className="teacher-companion-unread" aria-hidden="true" />}</span>
        <span className="teacher-companion-name">{name}</span>
        {checking && <Loader2 className="h-3 w-3 shrink-0 animate-spin text-muted-foreground motion-reduce:animate-none" aria-label="智能体正在思考" />}
      </button>}
      </nav>
      {(invitation || welcome) && <div ref={bubbleRef} className="teacher-companion-presence" data-testid="teacher-presence">
        <div className="teacher-companion-bubble" data-testid="teacher-invitation" data-bubble-kind={invitation ? 'check-in' : 'welcome'}>
          <div className="teacher-companion-bubble-heading">
            <div className="teacher-companion-invitation-label">{name}</div>
            <button type="button" className="teacher-companion-dismiss" aria-label="收起智能体气泡" onClick={companion.dismiss}><X className="h-3.5 w-3.5" aria-hidden="true" /></button>
          </div>
          <p className="teacher-companion-message" role="status">{invitation?.response ?? welcome}</p>
          <div className="teacher-companion-actions">
            <button type="button" onClick={viewConversation}>{open ? '看看智能体说的' : '和智能体聊聊'} <ArrowUpRight aria-hidden="true" className="h-3 w-3" /></button>
            <button type="button" onClick={companion.dismiss}>等会儿聊</button>
          </div>
        </div>
        <button type="button" className="teacher-companion-speaker" aria-label="打开这条智能体消息" onMouseDown={(event) => event.preventDefault()} onClick={viewConversation}>
          <TeacherAvatar definition={definition} />
        </button>
      </div>}
    </section>
  );
}