$ErrorActionPreference = 'Stop'

function ConvertFrom-Utf8Base64 {
  param([string]$Value)
  return [Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($Value))
}

function Assert-Contains {
  param([string]$Content, [string]$Expected, [string]$Message)
  if ($Content -notmatch [regex]::Escape($Expected)) { throw $Message }
}

function Assert-NotContains {
  param([string]$Content, [string]$Unexpected, [string]$Message)
  if ($Content -match [regex]::Escape($Unexpected)) { throw $Message }
}

$root = Split-Path -Parent $PSScriptRoot
$registerPath = Join-Path $root 'pages/auth/a04-register.vue'
$pages = Get-Content -LiteralPath (Join-Path $root 'pages.json') -Raw -Encoding utf8 | ConvertFrom-Json
$catalog = Get-Content -LiteralPath (Join-Path $root 'data/page-catalog.js') -Raw -Encoding utf8
$register = Get-Content -LiteralPath $registerPath -Raw -Encoding utf8
$globalStyles = Get-Content -LiteralPath (Join-Path $root 'styles/global.scss') -Raw -Encoding utf8
$registerCopy = ConvertFrom-Utf8Base64 '5rOo5YaM6LSm5Y+3'
$loginCopy = ConvertFrom-Utf8Base64 '55m75b2V'
$sliderPendingCopy = ConvertFrom-Utf8Base64 '5ruR5Yqo6aqM6K+B5b6F5o6l5Y+j5o6l5YWl'

if (-not ($pages.pages.path -contains 'pages/auth/a04-register')) { throw 'A-04 route must remain declared in pages.json' }
Assert-NotContains -Content $register -Unexpected 'ModulePage' -Message 'A-04 must not remain a ModulePage shell'
foreach ($required in @(
  '<AuthPageShell',
  'import AuthPageShell from "@/components/AuthPageShell.vue";',
  'a01-vnext-divider-v1.png',
  'a01-scroll-primary-v3.png',
  'a01-scroll-toast-v3.png',
  'a02-agreement-unchecked.png',
  'a02-agreement-checked.png',
  'v-model.trim="phone"',
  'v-model="password"',
  'v-model="confirmPassword"',
  'const agreed = ref(false)',
  'const agreementError = ref(false)',
  'const fieldErrors = ref({',
  'const toggleAgreement = () =>',
  'const submitRegister = () =>',
  'class="feedback-toast"',
  $sliderPendingCopy,
  'const prepareLogin = () => uni.redirectTo({ url:',
  '/pages/auth/a01-entry',
  'if (!/^1\d{10}$/.test(phone.value))',
  'if (!password.value)',
  'if (!confirmPassword.value)',
  'if (password.value !== confirmPassword.value)'
)) {
  Assert-Contains -Content $register -Expected $required -Message "Missing A-04 registration contract: $required"
}
Assert-Contains -Content $register -Expected $registerCopy -Message 'A-04 must visibly identify registration'
Assert-Contains -Content $register -Expected $loginCopy -Message 'A-04 must provide a login return path'
Assert-NotContains -Content $catalog -Unexpected 'a04:' -Message 'A-04 must not remain in the temporary page catalog'
Assert-NotContains -Content $register -Unexpected 'register-intro' -Message 'A-04 must not retain the redundant registration intro copy'
foreach ($forbidden in @('class="page-canvas"', 'class="page-backdrop"', 'mode="scaleToFill"', '1665rpx', 'a01-red-hall-ink-backdrop-v1.png')) {
  Assert-NotContains -Content $register -Unexpected $forbidden -Message "A04 retains rejected page coordinates: $forbidden"
}
Assert-Contains -Content $globalStyles -Expected 'font-family: "STKaiti", "KaiTi", serif' -Message 'Global styles must own the A04 font contract.'
Assert-NotContains -Content $register -Unexpected 'font-family:' -Message 'A04 must inherit the global font contract instead of overriding it locally.'
foreach ($obsoleteVisual in @(
  'a01-primary-button.png',
  'a01-secondary-button.png',
  'a02-login-panel.png',
  'verificationVisible',
  'verification-layer',
  'feedback-toast__skin'
)) {
  Assert-NotContains -Content $register -Unexpected $obsoleteVisual -Message "A04 must not retain obsolete visual or placeholder state: $obsoleteVisual"
}
foreach ($nativeUi in @('uni.showToast', 'uni.showModal', 'uni.showLoading', 'uni.showActionSheet')) {
  Assert-NotContains -Content $register -Unexpected $nativeUi -Message "A-04 must not use native UniApp feedback: $nativeUi"
}
foreach ($required in @(
  'register-divider',
  'mode="aspectFit"',
  'border-image-slice: 58 280 fill;',
  'top: calc(var(--status-bar-height, 0px) + 24rpx);'
)) {
  Assert-Contains -Content $register -Expected $required -Message "Missing A-04 visual balance contract: $required"
}

$contentRule = [regex]::Match($register, '(?ms)^\.register-content\s*\{(?<Body>.*?)^\}')
if (-not $contentRule.Success) { throw 'A04 register content rule is missing.' }
foreach ($required in @('display: flex;', 'flex: 1;', 'flex-direction: column;', 'max-width: 480px;', 'margin: 0 auto;')) {
  Assert-Contains -Content $contentRule.Groups['Body'].Value -Expected $required -Message "A04 register content must use document flow: $required"
}

foreach ($forbidden in @(
  '(?s)\.register-panel\s*\{[^}]*\bborder\s*:',
  '(?s)\.register-panel\s*\{[^}]*\bbackground\s*:',
  '(?s)\.register-submit\s*\{[^}]*\bborder\s*:',
  '(?s)\.register-submit\s*\{[^}]*\bbackground\s*:',
  '\.agreement-icon::(?:before|after)'
)) {
  if ($register -match $forbidden) { throw "A-04 retains forbidden CSS visual construction: $forbidden" }
}

Write-Output 'A04-REGISTRATION-CONTRACT PASS'