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

// 执行真实交付函数，仅替换浏览器宿主与 HTTP 边界。
const source = readFileSync(
  new URL('../src/views/m/crm/contract/print/deliverContractFile.ts', import.meta.url),
  'utf8'
)
const code = ts.transpileModule(
  source.replace(/^import .*$/gm, '').replace('export async function', 'async function'),
  { compilerOptions: { target: ts.ScriptTarget.ES2022, module: ts.ModuleKind.None } }
).outputText
function harness({
  wechat = true,
  marked = false,
  env = true,
  navigation = 'success',
  delayedSdk = false,
  pendingBridge = false
} = {}) {
  const calls = { saved: 0, uploaded: 0, navigated: [] as string[] }
  const events = new EventTarget()
  const script = new EventTarget()
  const mini = {
    getEnv(cb: (value: { miniprogram: boolean }) => void) {
      if (pendingBridge) {
        // JSSDK 1.6.0：桥接就绪后才读取宿主注入的环境标记。
        events.addEventListener('WeixinJSBridgeReady', () => cb({ miniprogram: marked }), {
          once: true
        })
        return
      }
      setTimeout(() => cb({ miniprogram: env }), 1)
    },
    navigateTo(options: any) {
      calls.navigated.push(options.url)
      if (navigation === 'success') options.success()
      if (navigation === 'fail') options.fail({ errMsg: 'page not found' })
    }
  }
  const window: any = { wx: delayedSdk ? undefined : { miniProgram: mini } }
  const context = vm.createContext({
    window,
    navigator: { userAgent: wechat ? 'iPhone MicroMessenger/8.0' : 'Safari' },
    document: {
      querySelector: () => (delayedSdk ? script : null),
      addEventListener: events.addEventListener.bind(events),
      removeEventListener: events.removeEventListener.bind(events)
    },
    setTimeout: (fn: () => void, ms: number) => setTimeout(fn, Math.min(ms, 30)),
    clearTimeout,
    File,
    encodeURIComponent,
    FileSaver: {
      saveAs() {
        calls.saved++
      }
    },
    isInMiniProgramWebView: () => marked,
    CRM_UPLOAD_BIZ_TYPE: { CONTRACT_ATTACHMENT: 'contract' },
    buildAttachmentUploadFormData: (file: File) => file,
    fetchUploadAttachment: async () => {
      calls.uploaded++
      return { data: { fileUrl: 'contracts/a.pdf' } }
    },
    fetchAttachmentDownloadUrl: async () => ({
      data: { downloadUrl: 'https://res.example.com/a.pdf?signature=x' }
    })
  })
  vm.runInContext(code + '\nglobalThis.deliver = deliverContractFile', context)
  return {
    calls,
    deliver: (isActive?: () => boolean) =>
      context.deliver(new Blob(['%PDF-1.3']), '测试合同.pdf', isActive),
    ready() {
      window.wx = { miniProgram: mini }
      script.dispatchEvent(new Event('load'))
    },
    bridgeReady() {
      marked = true
      events.dispatchEvent(new Event('WeixinJSBridgeReady'))
    }
  }
}
test('iPhone WeChat without synchronous markers waits for getEnv and opens native document page', async () => {
  const h = harness()
  assert.equal(await h.deliver(), 'mini-program-requested')
  assert.equal(h.calls.saved, 0)
  assert.equal(h.calls.uploaded, 1)
  assert.match(h.calls.navigated[0], /^\/pages\/common\/contract-document\?url=/)
})
test('ordinary browser still requests a browser download despite a JSSDK shell', async () => {
  const h = harness({ wechat: false })
  assert.equal(await h.deliver(), 'browser-download')
  assert.equal(h.calls.saved, 1)
  assert.equal(h.calls.uploaded, 0)
})
test('waits for the real JSSDK ordering: bridge ready then injected environment marker', async () => {
  const h = harness({ pendingBridge: true })
  const result = h.deliver()
  assert.equal(h.calls.saved, 0)
  assert.equal(h.calls.uploaded, 0)
  h.bridgeReady()
  assert.equal(await result, 'mini-program-requested')
  assert.equal(h.calls.uploaded, 1)
  assert.equal(h.calls.navigated.length, 1)
})
test('waits for an already loading JSSDK before delivering', async () => {
  const h = harness({ delayedSdk: true })
  const result = h.deliver()
  h.ready()
  assert.equal(await result, 'mini-program-requested')
  assert.equal(h.calls.saved, 0)
})
test('unconfirmed WeChat environment does not silently fall back to browser downloads', async () => {
  const h = harness({ env: false })
  await assert.rejects(h.deliver(), /小程序/)
  assert.equal(h.calls.saved, 0)
  assert.equal(h.calls.uploaded, 0)
})
test('missing JSSDK times out without downloading or uploading', async () => {
  const h = harness({ delayedSdk: true })
  await assert.rejects(h.deliver(), /微信文档接口未就绪/)
  h.ready()
  assert.equal(h.calls.saved, 0)
  assert.equal(h.calls.uploaded, 0)
})
test('closing while environment is pending prevents file upload and navigation', async () => {
  const h = harness()
  let active = true
  const result = h.deliver(() => active)
  active = false
  assert.equal(await result, undefined)
  assert.equal(h.calls.saved, 0)
  assert.equal(h.calls.uploaded, 0)
  assert.equal(h.calls.navigated.length, 0)
})
for (const navigation of ['fail', 'silent']) {
  test(
    `native navigation ${navigation} rejects instead of reporting success`,
    { timeout: 200 },
    async () => {
      const h = harness({ marked: true, navigation })
      await assert.rejects(h.deliver(), /文档/)
      assert.equal(h.calls.saved, 0)
    }
  )
}