import type { GiteaComment, GiteaIssue } from './api'
import { beforeEach, describe, expect, it, vi } from 'vitest'

const getCurrentUser = vi.fn()
const listIssuesByFilter = vi.fn()
const listIssueCommentsPage = vi.fn()
const listAllRepoComments = vi.fn()
const getDependencies = vi.fn()
const getPullRequest = vi.fn()
const postIssueComment = vi.fn()
const getIssue = vi.fn()
const listIssueComments = vi.fn()

vi.mock('./api', () => ({
  PAGE_SIZE: 50,
  getCurrentUser,
  listIssuesByFilter,
  listIssueCommentsPage,
  listAllRepoComments,
  getDependencies,
  getPullRequest,
  postIssueComment,
  getIssue,
  listIssueComments,
}))

function issue(n: number, extra: Partial<GiteaIssue> = {}): GiteaIssue {
  return {
    id: n,
    number: n,
    title: `Issue ${n}`,
    state: 'open',
    comments: 0,
    created_at: '2020-01-01T00:00:00Z',
    updated_at: '2020-01-01T00:00:00Z',
    body: '',
    html_url: `https://gitea.example/o/r/issues/${n}`,
    user: { login: 'me' },
    assignees: [{ login: 'me' }],
    labels: [],
    ...extra,
  }
}

function comment(body: string, index: number, id: number): GiteaComment {
  return {
    id,
    body,
    issue_url: `https://gitea.example/api/v1/repos/o/r/issues/${index}`,
    created_at: `2020-01-01T00:00:${String(id).padStart(2, '0')}Z`,
    updated_at: `2020-01-01T00:00:${String(id).padStart(2, '0')}Z`,
  }
}

describe('listCommentsUntilColumn', () => {
  beforeEach(() => {
    listIssueCommentsPage.mockReset()
  })

  it('commentCount 为 0 时不发请求', async () => {
    const { listCommentsUntilColumn } = await import('./issueLoader.js')
    const out = await listCommentsUntilColumn({
      host: 'gitea.example',
      token: 't',
      owner: 'o',
      repo: 'r',
      index: 1,
      commentCount: 0,
    })
    expect(out).toEqual([])
    expect(listIssueCommentsPage).not.toHaveBeenCalled()
  })

  it('先拉末页，没有 column JSON 再往前翻', async () => {
    const { listCommentsUntilColumn } = await import('./issueLoader.js')
    listIssueCommentsPage.mockImplementation(async (opts: { page: number }) => {
      if (opts.page === 2)
        return [comment('later discussion', 1, 51)]
      if (opts.page === 1)
        return [comment(JSON.stringify({ column: 'in-progress' }), 1, 1)]
      return []
    })

    const out = await listCommentsUntilColumn({
      host: 'gitea.example',
      token: 't',
      owner: 'o',
      repo: 'r',
      index: 1,
      commentCount: 51,
    })

    expect(listIssueCommentsPage.mock.calls.map(c => (c[0] as { page: number }).page)).toEqual([2, 1])
    expect(out.at(-1)?.body).toContain('later discussion')
    expect(out[0]?.body).toContain('in-progress')
  })
})

describe('loadIssues', () => {
  beforeEach(() => {
    getCurrentUser.mockReset()
    listIssuesByFilter.mockReset()
    listIssueCommentsPage.mockReset()
    listAllRepoComments.mockReset()
    getDependencies.mockReset()
    getPullRequest.mockReset()
    postIssueComment.mockReset()
    getCurrentUser.mockResolvedValue({ login: 'me', id: 1 })
    listIssuesByFilter.mockResolvedValue([])
    listIssueCommentsPage.mockResolvedValue([])
    getDependencies.mockResolvedValue([])
    postIssueComment.mockResolvedValue({})
  })

  it('不走整仓评论消防水管，只按工单拉末页', async () => {
    const { loadIssues } = await import('./issueLoader.js')
    listIssuesByFilter.mockResolvedValue([issue(7, { comments: 3 })])
    listIssueCommentsPage.mockResolvedValue([
      comment(JSON.stringify({ column: 'todo' }), 7, 1),
    ])

    const { issues, me } = await loadIssues({
      host: 'gitea.example',
      token: 't',
      owner: 'o',
      repo: 'r',
      scope: 'all',
    })

    expect(me).toBe('me')
    expect(listAllRepoComments).not.toHaveBeenCalled()
    expect(listIssueCommentsPage).toHaveBeenCalledWith(expect.objectContaining({ index: 7, page: 1 }))
    expect(issues).toHaveLength(1)
    expect(issues[0].column).toBe('todo')
  })

  it('缺 state 评论时用默认列，不代别人发评论', async () => {
    const { loadIssues } = await import('./issueLoader.js')
    listIssuesByFilter.mockResolvedValue([issue(3, { comments: 0, user: { login: 'cruldra' } })])

    const { issues } = await loadIssues({
      host: 'gitea.example',
      token: 't',
      owner: 'o',
      repo: 'r',
      scope: 'all',
    })
    expect(issues[0].column).toBe('todo')
    expect(postIssueComment).not.toHaveBeenCalled()
  })
})