const test = require('node:test')
const assert = require('node:assert/strict')
const fs = require('node:fs')
const path = require('node:path')
const vm = require('node:vm')
const ts = require('typescript')

// Exercise the exported client against the platform network/storage seam. No
// frontend E2E framework or production authentication bypass is introduced.
function client(network, options = {}) {
  const storage = new Map()
  let loginNumber = 0
  const taro = {
    login: async () => ({ code: `login-${++loginNumber}` }),
    getStorageSync: key => storage.get(key),
    setStorageSync: (key, value) => storage.set(key, value),
    removeStorageSync: key => { if (options.storageRemovalFails) throw new Error('storage unavailable'); storage.delete(key) },
    request: network,
  }
  const source = fs.readFileSync(path.join(__dirname, '../src/services/practice.ts'), 'utf8')
  const js = ts.transpileModule(source, { compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020, esModuleInterop: true } }).outputText
  const exports = {}
  vm.runInNewContext(js, { exports, require: name => { assert.equal(name, '@tarojs/taro'); return taro }, __API_BASE_URL__: 'https://local-test.invalid' })
  return exports
}
const ok = data => ({ statusCode: 200, data })
const session = token => ok({ token, expiresAt: '2099-01-01T00:00:00Z' })
const failure = (status, code) => ({ statusCode: status, data: { error: { code, message: code } } })

// Same public API calls as the pages: a renewed token cannot change a submitted
// form or create a fresh operation, including when platform storage removal fails.
test('expired sessions renew and retain the exact submission', async () => {
  let exchange = 0
  const payloads = []
  const service = client(async request => {
    if (request.url.endsWith('/session')) return session(`token-${++exchange}`)
    payloads.push(request.data)
    if (request.header.Authorization === 'Bearer token-1') return failure(401, 'unauthorized')
    return ok({ id: 'record-1' })
  }, { storageRemovalFails: true })
  const input = { projectId: 'p', date: '2026-09-28', minutes: 90, note: '', requestId: 'same-submission-1' }
  assert.equal((await service.api.saveRecord(input)).id, 'record-1')
  assert.equal(exchange, 2)
  assert.deepEqual(payloads, [input, input])
})

test('uncertain save stays recoverable and an explicit retry keeps its key', async () => {
  let lost = true
  const payloads = []
  const service = client(async request => {
    if (request.url.endsWith('/session')) return session('token')
    payloads.push(request.data)
    if (lost) { lost = false; throw new Error('response lost') }
    return ok({ id: 'record-1' })
  })
  const pending = { input: { projectId: 'p', date: '2026-09-28', minutes: 90, note: 'keep this', requestId: service.submissionID() } }
  service.retainPendingRecord(pending)
  await assert.rejects(service.api.saveRecord(pending.input), error => error.status === 0)
  const resumed = service.getPendingRecord()
  assert.equal(resumed, pending)
  assert.equal((await service.api.saveRecord(resumed.input)).id, 'record-1')
  assert.equal(payloads[0].requestId, payloads[1].requestId)
  service.clearPendingRecord(resumed)
  assert.equal(service.getPendingRecord(), undefined)
  assert.notEqual(service.submissionID(), pending.input.requestId)
})

test('failed loads stay errors and only confirmed writes notify visible pages', async () => {
  let failWrite = true
  const service = client(async request => {
    if (request.url.endsWith('/session')) return session('token')
    if (request.method === 'GET') return failure(503, 'service_unavailable')
    if (failWrite) { failWrite = false; return failure(503, 'service_unavailable') }
    return ok({ id: 'record-1' })
  })
  let changes = 0
  const stop = service.onPracticeChange(() => { changes++ })
  await assert.rejects(service.api.records(), error => error.status === 503)
  await assert.rejects(service.api.saveRecord({}), error => error.status === 503)
  assert.equal(changes, 0)
  await service.api.saveRecord({})
  assert.equal(changes, 1)
  stop()
})