import assert from 'node:assert/strict'
import { readFileSync } from 'node:fs'
import test from 'node:test'
import ts from 'typescript'

const source = readFileSync(
  new URL('../views/cell-storage/protocol/ProtocolFormDialog.vue', import.meta.url),
  'utf8'
)
function method(name: string) {
  const asyncStart = source.indexOf(`  async function ${name}(`)
  const start = asyncStart >= 0 ? asyncStart : source.indexOf(`  function ${name}(`)
  const end = source.indexOf('\n  }', start) + 4
  return source.slice(start, end)
}
function harness() {
  const requests: Array<{ resolve: (value: any) => void; reject: (error: Error) => void }> = []
  const hospitals: Array<{ resolve: () => void }> = []
  const refs = {
    managerLoading: { value: false },
    managerUserOptions: { value: [] as any[] },
    managerSnapshot: { value: null as any },
    regionManagerUserId: { value: null as string | null },
    formData: { regionId: 'a', regionManagerUserId: '' }
  }
  const deps = {
    ...refs,
    linkedRegionMode: { value: false },
    regionOptions: { value: [] },
    hospitalOptions: { value: [] },
    fetchRegionsByStaffUser: async () => ({ list: [{ id: 'b', regionName: 'B区' }] }),
    loadHospitalsByRegion: () => new Promise<void>((resolve) => hospitals.push({ resolve })),
    fetchProtocolRegionManagers: () =>
      new Promise((resolve, reject) => requests.push({ resolve, reject })),
    fetchUserList: async () => ({ list: [{ id: 'member', nickName: '普通员工' }] }),
    fetchRegionStaffList: async () => ({
      list: [{ userId: 'member', nickName: '普通员工', isLeader: false }]
    }),
    makeManagerUserStub: (id: string, nickName: string) => ({ id, nickName }),
    ElMessage: { error: () => {} }
  }
  const code = ts.transpileModule(
    `let managerSearchVersion = 0; let managerDefaultVersion = 0;
    ${method('remoteSearchManagerUsers')}
    ${method('applyDefaultRegionManager')}
    ${method('onManagerUserChange')}
    ${method('applyRegionsForSalesUser')}
    return { search: remoteSearchManagerUsers, apply: applyDefaultRegionManager, select: onManagerUserChange, applySales: applyRegionsForSalesUser }`,
    { compilerOptions: { target: ts.ScriptTarget.ES2022 } }
  ).outputText
  return {
    ...refs,
    requests,
    hospitals,
    ...new Function(...Object.keys(deps), code)(...Object.values(deps))
  }
}
const leaders = [
  { id: 'head-a', nickName: 'A负责人', regionIds: ['a'] },
  { id: 'head-b', nickName: 'B负责人', regionIds: ['b'] }
]

test('manager search uses all region leaders without appending historical ordinary users', async () => {
  const h = harness()
  h.regionManagerUserId.value = 'member'
  h.managerSnapshot.value = { id: 'member', nickName: '历史人员' }
  const pending = h.search('')
  h.requests[0]?.resolve({ list: leaders })
  await pending
  assert.deepEqual(
    h.managerUserOptions.value.map((u: any) => u.id),
    ['head-a', 'head-b']
  )
  assert.equal(h.managerSnapshot.value.nickName, '历史人员')
})

test('a region without a leader stays empty instead of defaulting to an ordinary member', async () => {
  const h = harness()
  const pending = h.apply('a')
  h.requests[0]?.resolve({ list: [leaders[1]] })
  await pending
  assert.equal(h.formData.regionManagerUserId, '')
  assert.equal(h.regionManagerUserId.value, null)
})

test('default manager belongs to selected region while candidates include all leaders', async () => {
  const h = harness()
  const pending = h.apply('a')
  h.requests[0]?.resolve({ list: leaders })
  await pending
  assert.equal(h.formData.regionManagerUserId, 'head-a')
  assert.deepEqual(
    h.managerUserOptions.value.map((u: any) => u.id),
    ['head-a', 'head-b']
  )
})

test('clearing a region invalidates pending manager defaults', async () => {
  const h = harness()
  const pending = h.apply('a')
  h.formData.regionId = ''
  await h.apply('')
  h.requests[0]?.resolve({ list: leaders })
  await pending
  assert.equal(h.formData.regionManagerUserId, '')
})

test('out-of-order manager searches cannot overwrite the latest result', async () => {
  const h = harness()
  const first = h.search('A')
  const second = h.search('B')
  h.requests[1]?.resolve({ list: leaders })
  await second
  h.requests[0]?.resolve({ list: leaders })
  await first
  assert.deepEqual(
    h.managerUserOptions.value.map((u: any) => u.id),
    ['head-b']
  )
})

test('a manual selection is not overwritten by a pending default response', async () => {
  const h = harness()
  const pending = h.apply('a')
  h.managerUserOptions.value = leaders
  h.select('head-b')
  h.requests[0].resolve({ list: leaders })
  await pending
  assert.equal(h.formData.regionManagerUserId, 'head-b')
})

test('failed manager loading clears the old default and never falls back to ordinary users', async () => {
  const h = harness()
  h.formData.regionManagerUserId = 'old'
  h.regionManagerUserId.value = 'old'
  const pending = h.apply('a')
  h.requests[0].reject(new Error('network failure'))
  await pending
  assert.equal(h.formData.regionManagerUserId, '')
  assert.deepEqual(h.managerUserOptions.value, [])
})

test('a delayed default call for an old region cannot clear the current manager', async () => {
  const h = harness()
  h.formData.regionId = 'b'
  h.formData.regionManagerUserId = 'head-b'
  h.regionManagerUserId.value = 'head-b'
  const pending = h.apply('a')
  h.requests[0]?.resolve({ list: leaders })
  await pending
  assert.equal(h.formData.regionManagerUserId, 'head-b')
  assert.equal(h.regionManagerUserId.value, 'head-b')
})

test('sales-linked region loading does not overwrite a manager chosen while hospitals load', async () => {
  const h = harness()
  const pending = h.applySales('sales-b')
  await Promise.resolve()
  h.managerUserOptions.value = leaders
  h.select('head-a')
  h.hospitals[0].resolve()
  await Promise.resolve()
  h.requests[0].resolve({ list: leaders })
  await pending
  assert.equal(h.formData.regionManagerUserId, 'head-a')
})