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import assert from 'node:assert/strict'
import fs from 'node:fs'
import os from 'node:os'
import path from 'node:path'
import { test } from 'vitest'

import { checkDistBuilt } from '../scripts/assert-dist-built.mjs'

function makeDist(extra) {
  const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'hermes-assert-dist-'))
  const distDir = path.join(tempRoot, 'dist')
  fs.mkdirSync(distDir, { recursive: true })
  if (extra) extra(distDir)
  return { tempRoot, distDir }
}

function writeRouterAsset(distDir, name) {
  fs.writeFileSync(
    path.join(distDir, 'assets', name),
    `throw new Error('may be used only in the context of a <Router>')`,
    'utf8',
  )
}

function writeQueryClientAsset(distDir, name) {
  fs.writeFileSync(
    path.join(distDir, 'assets', name),
    `throw new Error('No QueryClient set, use QueryClientProvider to set one')`,
    'utf8',
  )
}

test('checkDistBuilt passes when index.html + an assets JS bundle exist', () => {
  const { tempRoot, distDir } = makeDist(d => {
    fs.writeFileSync(path.join(d, 'index.html'), '<!doctype html><div id=root></div>', 'utf8')
    fs.mkdirSync(path.join(d, 'assets'))
    fs.writeFileSync(path.join(d, 'assets', 'index-abc123.js'), 'console.log(1)', 'utf8')
  })
  try {
    assert.deepEqual(checkDistBuilt(distDir), { ok: true })
  } finally {
    fs.rmSync(tempRoot, { recursive: true, force: true })
  }
})

test('checkDistBuilt fails when the dist directory is absent', () => {
  const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'hermes-assert-dist-'))
  try {
    const result = checkDistBuilt(path.join(tempRoot, 'dist'))
    assert.equal(result.ok, false)
    assert.match(result.error, /no dist directory/)
  } finally {
    fs.rmSync(tempRoot, { recursive: true, force: true })
  }
})

test('checkDistBuilt fails when index.html is missing', () => {
  const { tempRoot, distDir } = makeDist(d => {
    fs.mkdirSync(path.join(d, 'assets'))
    fs.writeFileSync(path.join(d, 'assets', 'index-abc123.js'), 'console.log(1)', 'utf8')
  })
  try {
    const result = checkDistBuilt(distDir)
    assert.equal(result.ok, false)
    assert.match(result.error, /index\.html is missing/)
  } finally {
    fs.rmSync(tempRoot, { recursive: true, force: true })
  }
})

test('checkDistBuilt fails when index.html is empty', () => {
  const { tempRoot, distDir } = makeDist(d => {
    fs.writeFileSync(path.join(d, 'index.html'), '', 'utf8')
    fs.mkdirSync(path.join(d, 'assets'))
    fs.writeFileSync(path.join(d, 'assets', 'index-abc123.js'), 'console.log(1)', 'utf8')
  })
  try {
    const result = checkDistBuilt(distDir)
    assert.equal(result.ok, false)
    assert.match(result.error, /index\.html is empty/)
  } finally {
    fs.rmSync(tempRoot, { recursive: true, force: true })
  }
})

test('checkDistBuilt fails when assets/ has no JS bundle', () => {
  const { tempRoot, distDir } = makeDist(d => {
    fs.writeFileSync(path.join(d, 'index.html'), '<!doctype html>', 'utf8')
    fs.mkdirSync(path.join(d, 'assets'))
    // CSS only, no JS — still a blank page at runtime.
    fs.writeFileSync(path.join(d, 'assets', 'index-abc123.css'), 'body{}', 'utf8')
  })
  try {
    const result = checkDistBuilt(distDir)
    assert.equal(result.ok, false)
    assert.match(result.error, /no built JS bundle/)
  } finally {
    fs.rmSync(tempRoot, { recursive: true, force: true })
  }
})

test('checkDistBuilt passes when the Router context invariant is in one JS asset', () => {
  const { tempRoot, distDir } = makeDist(d => {
    fs.writeFileSync(path.join(d, 'index.html'), '<!doctype html>', 'utf8')
    fs.mkdirSync(path.join(d, 'assets'))
    writeRouterAsset(d, 'vendor-react-abc123.js')
    fs.writeFileSync(path.join(d, 'assets', 'command-def456.js'), 'console.log(1)', 'utf8')
  })
  try {
    assert.deepEqual(checkDistBuilt(distDir), { ok: true })
  } finally {
    fs.rmSync(tempRoot, { recursive: true, force: true })
  }
})

test('checkDistBuilt fails when the Router context invariant is in multiple JS assets', () => {
  const { tempRoot, distDir } = makeDist(d => {
    fs.writeFileSync(path.join(d, 'index.html'), '<!doctype html>', 'utf8')
    fs.mkdirSync(path.join(d, 'assets'))
    writeRouterAsset(d, 'vendor-react-abc123.js')
    writeRouterAsset(d, 'command-def456.js')
  })
  try {
    const result = checkDistBuilt(distDir)
    assert.equal(result.ok, false)
    assert.match(result.error, /react-router context invariant found in multiple JS assets/)
    assert.match(result.error, /vendor-react-abc123\.js/)
    assert.match(result.error, /command-def456\.js/)
  } finally {
    fs.rmSync(tempRoot, { recursive: true, force: true })
  }
})

test('checkDistBuilt passes when the QueryClient context invariant is in one JS asset', () => {
  const { tempRoot, distDir } = makeDist(d => {
    fs.writeFileSync(path.join(d, 'index.html'), '<!doctype html>', 'utf8')
    fs.mkdirSync(path.join(d, 'assets'))
    writeQueryClientAsset(d, 'vendor-react-abc123.js')
    fs.writeFileSync(path.join(d, 'assets', 'command-def456.js'), 'console.log(1)', 'utf8')
  })
  try {
    assert.deepEqual(checkDistBuilt(distDir), { ok: true })
  } finally {
    fs.rmSync(tempRoot, { recursive: true, force: true })
  }
})

test('checkDistBuilt fails when the QueryClient context invariant is in multiple JS assets (#95560)', () => {
  const { tempRoot, distDir } = makeDist(d => {
    fs.writeFileSync(path.join(d, 'index.html'), '<!doctype html>', 'utf8')
    fs.mkdirSync(path.join(d, 'assets'))
    writeQueryClientAsset(d, 'vendor-react-abc123.js')
    writeQueryClientAsset(d, 'session-list-density-def456.js')
  })
  try {
    const result = checkDistBuilt(distDir)
    assert.equal(result.ok, false)
    assert.match(result.error, /@tanstack\/react-query context invariant found in multiple JS assets/)
    assert.match(result.error, /vendor-react-abc123\.js/)
    assert.match(result.error, /session-list-density-def456\.js/)
  } finally {
    fs.rmSync(tempRoot, { recursive: true, force: true })
  }
})