import { describe, it, expect, vi, beforeEach } from 'vitest'
import { mount, flushPromises } from '@vue/test-utils'
import { createPinia, setActivePinia } from 'pinia'
import type { Application, Artifact, Approval } from '@/types'

// Mock the api module inline so vi.mock factory is self-contained
vi.mock('@/api', () => ({
  getApplications: vi.fn(),
  getArtifacts: vi.fn(),
  createCoverLetter: vi.fn(),
  createApproval: vi.fn(),
  confirmApproval: vi.fn(),
  rejectApproval: vi.fn(),
  outboxSend: vi.fn(),
  HttpError: class HttpError extends Error {
    status: number
    body: unknown
    constructor(status: number, body: unknown, msg?: string) {
      super(msg ?? `HTTP ${status}`)
      this.status = status
      this.body = body
    }
  }
}))

function makeApp(): Application {
  return {
    id: 'app-1',
    job_posting_id: 'j-1',
    state: 'drafting',
    score: 90,
    score_rationale: null,
    notes: '',
    state_changed_at: '2026-01-01T00:00:00Z',
    created_at: '2026-01-01T00:00:00Z',
    posting: {
      id: 'j-1', source: 'manual_url', external_id: null, url: 'http://x',
      company: 'Acme', title: 'Engineer', location: 'Remote', description: '',
      raw: {}, fetched_at: '2026-01-01T00:00:00Z'
    }
  }
}

function makeArtifact(): Artifact {
  return {
    id: 'art-1',
    application_id: 'app-1',
    kind: 'cover_letter',
    filename: 'cover.pdf',
    content_hash: 'abcdef0123456789',
    storage_path: '/tmp/cover.pdf',
    version: 1,
    origin: 'user_drafted',
    created_at: '2026-01-01T00:00:00Z'
  }
}

function makeApproval(confirmed: boolean): Approval {
  return {
    id: 'appr-1',
    application_id: 'app-1',
    artifact_id: 'art-1',
    artifact_hash: 'abcdef0123456789',
    action: 'send_email',
    confirmed_by_user: confirmed,
    confirmed_at: confirmed ? '2026-01-01T00:00:00Z' : null,
    expires_at: '2026-01-02T00:00:00Z',
    created_at: '2026-01-01T00:00:00Z'
  }
}

async function mountDetail(app: Application, artifacts: Artifact[]) {
  const pinia = createPinia()
  setActivePinia(pinia)
  const api = await import('@/api')
  ;(api.getApplications as ReturnType<typeof vi.fn>).mockResolvedValue([app])
  ;(api.getArtifacts as ReturnType<typeof vi.fn>).mockResolvedValue(artifacts)
  const ApplicationDetail = (await import('@/views/ApplicationDetail.vue')).default
  const wrapper = mount(ApplicationDetail, { props: { id: 'app-1' } })
  await flushPromises()
  return { wrapper, pinia }
}

/** Find the Send button (has class ml-2 to distinguish from the Save button) */
function findSendBtn(wrapper: ReturnType<typeof mount>): ReturnType<typeof wrapper.find> {
  return wrapper.find('button.ml-2')
}

describe('Approval widget', () => {
  beforeEach(() => {
    vi.clearAllMocks()
  })

  it('disables Send until confirmed', async () => {
    const { wrapper } = await mountDetail(makeApp(), [makeArtifact()])
    const api = await import('@/api')

    // Request approval (not confirmed yet)
    ;(api.createApproval as ReturnType<typeof vi.fn>).mockResolvedValue(makeApproval(false))

    // Select artifact and action
    const selects = wrapper.findAll('select')
    await selects[0].setValue('art-1')
    await selects[1].setValue('send_email')

    // Click Request Approval (bg-gray-700)
    await wrapper.find('button.bg-gray-700').trigger('click')
    await flushPromises()

    // Send button should be disabled because not confirmed
    const sendBtn = findSendBtn(wrapper)
    expect(sendBtn.exists()).toBe(true)
    expect(sendBtn.attributes('disabled')).toBeDefined()

    // Now confirm
    ;(api.confirmApproval as ReturnType<typeof vi.fn>).mockResolvedValue(makeApproval(true))
    const confirmBtn = wrapper.find('button.bg-green-600')
    await confirmBtn.trigger('click')
    await flushPromises()

    // Send button should now be enabled
    expect(sendBtn.attributes('disabled')).toBeUndefined()
  })

  it('shows error toast on 409 send failure', async () => {
    const { wrapper, pinia } = await mountDetail(makeApp(), [makeArtifact()])
    const api = await import('@/api')

    // Setup: approval already confirmed
    ;(api.createApproval as ReturnType<typeof vi.fn>).mockResolvedValue(makeApproval(true))
    const selects = wrapper.findAll('select')
    await selects[0].setValue('art-1')
    await selects[1].setValue('send_email')
    await wrapper.find('button.bg-gray-700').trigger('click')
    await flushPromises()

    // Simulate 409 on send
    const httpErr = new api.HttpError(409, { error: { code: 'HASH_MISMATCH', message: 'Hash mismatch' } })
    ;(api.outboxSend as ReturnType<typeof vi.fn>).mockRejectedValue(httpErr)

    const sendBtn = findSendBtn(wrapper)
    await sendBtn.trigger('click')
    await flushPromises()

    // Check the toast store for the error message
    const toastState = pinia.state.value.toast
    expect(toastState).toBeTruthy()
    expect(toastState.toasts.length).toBeGreaterThanOrEqual(1)
    const errorToasts = toastState.toasts.filter((t: { type: string }) => t.type === 'error')
    expect(errorToasts.length).toBeGreaterThanOrEqual(1)
    expect(errorToasts[0].message).toContain('Hash mismatch')
  })
})