import { MessageResource } from '../../types'
import { isSystemMessage } from '../../utils/system_messages'

const makeMessage = (overrides: Partial<MessageResource> = {}): MessageResource => ({
  type: 'Message',
  id: '1',
  text: null,
  html: '',
  createdAt: '2026-01-01T00:00:00Z',
  deletedAt: null,
  textEditedAt: null,
  mine: false,
  attachments: [],
  author: { id: -1, type: 'Person', name: 'System', avatar: '' },
  reactionCounts: [],
  replyCount: 0,
  replyRootId: null,
  messageType: 'user',
  personIdsForSystemEvent: null,
  systemTextParts: null,
  systemTextFormat: null,
  ...overrides,
})

const joinedParts = { names: ['Alice'], overflowCount: 0, action: 'joined the conversation' }

describe('isSystemMessage', () => {
  it('returns true for people messages with names and person ids', () => {
    const message = makeMessage({
      messageType: 'user_joined',
      systemTextFormat: 'people',
      personIdsForSystemEvent: [1],
      systemTextParts: joinedParts,
    })
    expect(isSystemMessage(message)).toBe(true)
  })

  it('returns true for actor messages of a type the client does not know', () => {
    const message = makeMessage({
      messageType: 'some_future_type',
      systemTextFormat: 'actor',
      text: 'This conversation was archived by Alice',
    })
    expect(isSystemMessage(message)).toBe(true)
  })

  it('returns false for messages without a system text format', () => {
    const message = makeMessage({ messageType: 'user_joined', systemTextParts: joinedParts })
    expect(isSystemMessage(message)).toBe(false)
  })

  it('returns false for people messages without systemTextParts', () => {
    const message = makeMessage({ systemTextFormat: 'people', personIdsForSystemEvent: [1] })
    expect(isSystemMessage(message)).toBe(false)
  })

  it('returns false for people messages without personIdsForSystemEvent', () => {
    const message = makeMessage({ systemTextFormat: 'people', systemTextParts: joinedParts })
    expect(isSystemMessage(message)).toBe(false)
  })

  it.each([null, ''])('returns false for actor messages with text %p', text => {
    const message = makeMessage({ systemTextFormat: 'actor', text })
    expect(isSystemMessage(message)).toBe(false)
  })
})