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')

function loadApi(env, search) {
  let requests = 0
  let uploads = 0
  const taro = { default: {
    getStorageSync: () => '',
    request: async () => { requests++; return { data: { code: 0, data: { id: 9 } } } },
    uploadFile: async () => { uploads++; return { data: JSON.stringify({ code: 0, data: { id: 9 } }) } }
  } }
  const cache = {}
  function load(name) {
    if (cache[name]) return cache[name]
    const source = fs.readFileSync(path.resolve(__dirname, `../src/services/${name}.ts`), 'utf8')
    const code = ts.transpileModule(source, { compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2017 } }).outputText
    const exports = {}
    cache[name] = exports
    vm.runInNewContext(code, {
      exports, process: { env: { TARO_ENV: env } }, window: { location: { search } }, URLSearchParams,
      require: (id) => id === '@tarojs/taro' ? taro : load('frontendPreview')
    })
    return exports
  }
  return { api: load('request').api, counts: () => ({ requests, uploads }) }
}

test('显式H5预览使用示例资料，阻止后端读取、保存和上传', async () => {
  const { api, counts } = loadApi('h5', '?preview=1')
  const profile = await api.profile()
  assert.equal(profile.id, 0)
  assert.equal(profile.birthday, '1998-06-18')
  await assert.rejects(api.updateProfile({ nickname: 'Changed' }), /纯前端预览/)
  await assert.rejects(api.uploadAvatar('local.png'), /纯前端预览/)
  await assert.rejects(api.agreement('privacy'), /纯前端预览/)
  assert.deepEqual(counts(), { requests: 0, uploads: 0 })
  profile.nickname = 'Mutated'
  assert.equal((await api.profile()).nickname, 'You')
})

test('普通H5和微信端不使用预览资料', async () => {
  for (const [env, search] of [['h5', ''], ['h5', '?preview=0'], ['weapp', '?preview=1']]) {
    const { api, counts } = loadApi(env, search)
    assert.equal((await api.profile()).id, 9)
    assert.deepEqual(counts(), { requests: 1, uploads: 0 })
  }
})