import test from 'node:test'
import assert from 'node:assert/strict'
import path from 'node:path'
import { fileURLToPath } from 'node:url'
import esbuild from 'esbuild'

// Zwischenablage: copyTextChecked (streng, für das Pult) und copyText (verschluckt Fehler, für die Kundenansicht).
// CopyableCredential.jsx wird mit einer Attrappe für react gebündelt; navigator und document sind Attrappen, die jeden Aufruf mitschreiben.
// Endprüfung P3 (W2): scheitern Clipboard-API und Notweg, darf „Kopieren & öffnen“ nicht „Kopiert“ melden.

async function load() {
  const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../..')
  const STUB = {
    react: 'export const useEffect = () => {}; export const useRef = () => ({ current: null }); export const useState = (v) => [v, () => {}]',
    'react/jsx-runtime': 'export const jsx = () => null; export const jsxs = () => null; export const Fragment = null',
  }
  const reactStub = {
    name: 'react-stub',
    setup(build) {
      build.onResolve({ filter: /^react(\/jsx-runtime)?$/ }, (a) => ({ path: a.path, namespace: 'react-stub' }))
      build.onLoad({ filter: /.*/, namespace: 'react-stub' }, (a) => ({ contents: STUB[a.path], loader: 'js' }))
    },
  }
  const out = await esbuild.build({
    stdin: {
      contents: "export { copyText, copyTextChecked } from './src/components/CopyableCredential.jsx'\nexport { copyAndOpen } from './src/lib/workersPult.js'",
      resolveDir: root,
      loader: 'js',
    },
    bundle: true, format: 'esm', platform: 'neutral', write: false, jsx: 'automatic', loader: { '.jsx': 'jsx' }, plugins: [reactStub],
  })
  return import(`data:text/javascript;base64,${Buffer.from(out.outputFiles[0].text).toString('base64')}`)
}

const { copyText, copyTextChecked, copyAndOpen } = await load()

// Umgebung mit Protokoll. writeText: 'ok' | 'reject' | 'missing' (navigator.clipboard fehlt, z. B. unsicherer Kontext);
// execCommand: true | false | 'throw'
function setup({ writeText = 'ok', execCommand = true } = {}) {
  const log = []
  const textareas = []
  const clipboard = writeText === 'missing' ? undefined : {
    writeText: (text) => {
      log.push(`writeText:${text}`)
      return writeText === 'ok' ? Promise.resolve() : Promise.reject(new DOMException('Document is not focused.', 'NotAllowedError'))
    },
  }
  const original = Object.getOwnPropertyDescriptor(globalThis, 'navigator')
  Object.defineProperty(globalThis, 'navigator', { value: { clipboard }, configurable: true, writable: true })
  const body = {
    appendChild: (el) => { el.parentNode = body; log.push('append') },
    removeChild: (el) => { el.parentNode = null; log.push('remove') },
  }
  globalThis.document = {
    body,
    createElement: (tag) => {
      const el = { tag, value: '', style: {}, attrs: {}, parentNode: null, setAttribute(k, v) { this.attrs[k] = v }, select() { log.push('select') } }
      textareas.push(el)
      return el
    },
    execCommand: (cmd) => {
      log.push(`exec:${cmd}`)
      if (execCommand === 'throw') throw new Error('execCommand gesperrt')
      return execCommand
    },
  }
  return {
    log,
    textareas,
    restore() {
      if (original) Object.defineProperty(globalThis, 'navigator', original)
      else delete globalThis.navigator
      delete globalThis.document
    },
  }
}

test('copyTextChecked: Clipboard-API klappt ⇒ erfüllt, kein Notweg', async () => {
  const env = setup({ writeText: 'ok' })
  try {
    await copyTextChecked('Hallo')
    assert.deepEqual(env.log, ['writeText:Hallo'])
  } finally { env.restore() }
})

test('copyTextChecked: Clipboard-API abgelehnt, Notweg liefert true ⇒ erfüllt; das Textfeld ist danach wieder entfernt', async () => {
  const env = setup({ writeText: 'reject', execCommand: true })
  try {
    await copyTextChecked('Hallo')
    assert.deepEqual(env.log, ['writeText:Hallo', 'append', 'select', 'exec:copy', 'remove'])
    assert.equal(env.textareas.length, 1)
    assert.equal(env.textareas[0].value, 'Hallo')
    assert.equal(env.textareas[0].parentNode, null)
  } finally { env.restore() }
})

test('copyTextChecked: kein navigator.clipboard (unsicherer Kontext) ⇒ Notweg wird benutzt', async () => {
  const env = setup({ writeText: 'missing', execCommand: true })
  try {
    await copyTextChecked('Hallo')
    assert.deepEqual(env.log, ['append', 'select', 'exec:copy', 'remove'])
  } finally { env.restore() }
})

test('copyTextChecked: Clipboard-API abgelehnt und execCommand liefert false ⇒ lehnt mit „Kopieren fehlgeschlagen“ ab, Textfeld entfernt', async () => {
  const env = setup({ writeText: 'reject', execCommand: false })
  try {
    await assert.rejects(copyTextChecked('Hallo'), { message: 'Kopieren fehlgeschlagen' })
    assert.deepEqual(env.log, ['writeText:Hallo', 'append', 'select', 'exec:copy', 'remove'])
    assert.equal(env.textareas[0].parentNode, null)
  } finally { env.restore() }
})

test('copyTextChecked: wirft der Notweg selbst, wird das Textfeld trotzdem entfernt und der Fehler bleibt sichtbar', async () => {
  const env = setup({ writeText: 'reject', execCommand: 'throw' })
  try {
    await assert.rejects(copyTextChecked('Hallo'), { message: 'execCommand gesperrt' })
    assert.equal(env.log.at(-1), 'remove')
    assert.equal(env.textareas[0].parentNode, null)
  } finally { env.restore() }
})

test('copyText (Kundenansicht): verschluckt jeden Fehlschlag wie bisher und wirft nie', async () => {
  for (const options of [{ writeText: 'reject', execCommand: false }, { writeText: 'reject', execCommand: 'throw' }, { writeText: 'missing', execCommand: false }]) {
    const env = setup(options)
    try {
      assert.equal(await copyText('Hallo'), undefined)
    } finally { env.restore() }
  }
  const env = setup({ writeText: 'ok' })
  try {
    await copyText('Hallo')
    assert.deepEqual(env.log, ['writeText:Hallo'])
  } finally { env.restore() }
})

test('Pult „Kopieren & öffnen“: scheitern beide Kopierwege, meldet copyAndOpen copied:false (die Quelle wird trotzdem geöffnet)', async () => {
  const env = setup({ writeText: 'reject', execCommand: false })
  try {
    const opened = []
    const result = await copyAndOpen({ text: 'Antwort', url: 'https://www.kleinanzeigen.de/s-anzeige/x/1', copy: copyTextChecked, open: (u) => { opened.push(u); env.log.push('open') } })
    assert.deepEqual(result, { copied: false, opened: true })
    assert.deepEqual(opened, ['https://www.kleinanzeigen.de/s-anzeige/x/1'])
    // writeText steht vor dem Öffnen (Nutzer-Geste), die Ablehnung wird danach abgewartet
    assert.ok(env.log.indexOf('writeText:Antwort') < env.log.indexOf('open'))
  } finally { env.restore() }
})

test('Pult „Kopieren & öffnen“: Notweg klappt ⇒ copied:true; Clipboard-API klappt ⇒ copied:true, writeText vor open', async () => {
  let env = setup({ writeText: 'reject', execCommand: true })
  try {
    assert.deepEqual(await copyAndOpen({ text: 'A', url: 'https://example.org/x', copy: copyTextChecked, open: () => {} }), { copied: true, opened: true })
  } finally { env.restore() }
  env = setup({ writeText: 'ok' })
  try {
    const result = await copyAndOpen({ text: 'B', url: 'https://example.org/x', copy: copyTextChecked, open: () => env.log.push('open') })
    assert.deepEqual(result, { copied: true, opened: true })
    assert.deepEqual(env.log, ['writeText:B', 'open'])
  } finally { env.restore() }
})

test('Pult „Kopieren & öffnen“ mit der verschluckenden Fassung würde fälschlich copied:true melden (darum nimmt PultList copyTextChecked)', async () => {
  const env = setup({ writeText: 'reject', execCommand: false })
  try {
    assert.deepEqual(await copyAndOpen({ text: 'C', url: 'https://example.org/x', copy: copyText, open: () => {} }), { copied: true, opened: true })
  } finally { env.restore() }
})