import { describe, expect, it } from 'vitest'
import { groupRunMessages } from '../../packages/client/src/components/hermes/chat/groupRunMessages'
import type { Message } from '../../packages/client/src/stores/hermes/chat'

const message = (id: string, role: Message['role'], content = ''): Message => ({ id, role, content, timestamp: 1 })

describe('groupRunMessages', () => {
  it('groups text across tool calls and marks completion only when the run ends', () => {
    const input = [message('u', 'user', 'question'), message('a', 'assistant', 'first'), message('t', 'tool'), message('b', 'assistant', 'second')]
    const active = groupRunMessages(input, true)
    expect(active.map(m => m.role)).toEqual(['user', 'assistant'])
    expect(active[1].toolMessages).toEqual([input[2]])
    expect(active[1]).toMatchObject({ id: 'b', content: 'first\n\nsecond' })
    expect(active[1].contentSegments).toEqual(['first', 'second'])
    const finished = groupRunMessages(input, false)
    expect(finished.at(-1)?.systemType).toBe('run-end')
  })

  it('keeps separate user turns and explicit run markers separate', () => {
    const input = [message('u', 'user'), { ...message('a', 'assistant', 'one'), runMarker: '1' }, { ...message('b', 'assistant', 'two'), runMarker: '2' }, message('u2', 'user'), message('c', 'assistant', 'three')]
    expect(groupRunMessages(input, false).filter(m => m.role === 'assistant').map(m => m.content)).toEqual(['one', 'two', 'three'])
    expect(groupRunMessages(input, false).filter(m => m.systemType === 'run-end')).toHaveLength(3)
  })

  it('keeps tool calls grouped within their own turn', () => {
    const input = [message('u', 'user'), message('a', 'tool'), message('b', 'tool'), message('u2', 'user'), message('c', 'tool')]
    const groups = groupRunMessages(input, false).filter(m => m.systemType === 'tool-group')
    expect(groups.map(group => group.toolMessages?.map(tool => tool.id))).toEqual([['a', 'b'], ['c']])
  })
})