$ErrorActionPreference = 'Stop'

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

function Assert-NoCssSurface {
  param([string]$Content, [string]$ClassName)
  foreach ($property in @('border', 'background', 'border-radius')) {
    $pattern = "(?s)\\.$ClassName\\s*\\{[^}]*\\b$property\\s*:"
    if ($Content -match $pattern) { throw "G06 must not construct .$ClassName with CSS $property" }
  }
}

$root = Split-Path -Parent $PSScriptRoot
$pages = Get-Content -LiteralPath (Join-Path $root 'pages.json') -Raw -Encoding utf8 | ConvertFrom-Json
$paths = @($pages.pages.path)
$g06 = Get-Content -LiteralPath (Join-Path $root 'pages/genealogy/g06-search-genealogies.vue') -Raw -Encoding utf8
$g07 = Join-Path $root 'pages/genealogy/g07-search-result.vue'
$titleStripPath = Join-Path $root 'static/assets/modules/genealogy/opaque/g06-search-title-strip.png'
$inputSkinPath = Join-Path $root 'static/assets/modules/genealogy/opaque/g06-search-input-wide.png'
$buttonSkinPath = Join-Path $root 'static/assets/modules/genealogy/opaque/g06-search-button.png'

if (-not ($paths -contains 'pages/genealogy/g06-search-genealogies')) { throw 'G06 route missing' }
if ($paths -contains 'pages/genealogy/g07-search-result') { throw 'G07 route must be removed; search results are a G06 state' }
if (Test-Path -LiteralPath $g07) { throw 'G07 page file must be deleted; search results are a G06 state' }

foreach ($required in @(
  "const mode = ref('search')",
  "const searchState = ref('initial')",
  "const inviteState = ref('initial')",
  'const resultFixtures = [',
  "relation: 'available'",
  "relation: 'joined'",
  "relation: 'pending'",
  "relation: 'rejected'",
  "relation: 'removed'",
  "relation: 'owned'",
  'parentName:',
  'branchName:',
  'manager:',
  'certification:',
  '/pages/genealogy/g08-join-application?source=search&genealogyId=',
  '/pages/genealogy/g08-join-application?source=invite&genealogyId=',
  '/pages/genealogy/g05-genealogy-overview?mode=public&genealogyId=',
  'search-page__header',
  'g06-search-input-wide.png',
  'g06-search-button.png',
  'g06-search-title-strip.png',
  'search-title-strip',
  'section-divider.png',
  'root-header-hall.png',
  'search-controls',
  'search-field__skin',
  'search-action__skin',
  'search-initial',
  'search-results',
  'search-empty',
  'search-action'
)) {
  Assert-Contains -Content $g06 -Expected $required -Message "Missing G06 flow contract: $required"
}

foreach ($forbidden in @("from '@/utils/api.js'", 'appApi.', 'uni.showToast', 'uni.showModal', 'uni.showLoading', 'uni.showActionSheet')) {
  if ($g06 -match [regex]::Escape($forbidden)) { throw "G06 retains forbidden implementation: $forbidden" }
}

if ($g06 -match [regex]::Escape('appApi.applyToJoin')) { throw 'G06 must navigate to G08 instead of submitting an application directly' }
if ($g06 -match [regex]::Escape('g06-search-panel-v2.png')) { throw 'G06 must not embed the search controls in a large panel image' }
if ($g06 -match [regex]::Escape('search-hero')) { throw 'G06 must replace the floating hero with the selected title-strip hierarchy' }
if ($g06 -match [regex]::Escape('g06-search-input.png')) { throw 'G06 must use the wide selected-design input skin instead of the tall legacy skin' }

foreach ($className in @('search-title-strip', 'search-field', 'search-action')) {
  Assert-NoCssSurface -Content $g06 -ClassName $className
}

if ($g06 -notmatch '(?s)\.search-controls\s*\{[^}]*display:\s*flex[^}]*align-items:\s*center[^}]*gap:\s*20rpx') {
  throw 'G06 search input and action must form one compact control row'
}

Add-Type -AssemblyName System.Drawing
foreach ($asset in @(
  @{ Path = $titleStripPath; Width = 1122; Height = 220; Label = 'search-title-strip' },
  @{ Path = $inputSkinPath; Width = 1120; Height = 248; Label = 'search-input' },
  @{ Path = $buttonSkinPath; Width = 300; Height = 132; Label = 'search-button' }
)) {
  if (-not (Test-Path -LiteralPath $asset.Path)) { throw "G06 requires a final opaque $($asset.Label) bitmap" }
  $bitmap = [System.Drawing.Bitmap]::FromFile($asset.Path)
  try {
    if ($bitmap.Width -ne $asset.Width -or $bitmap.Height -ne $asset.Height) { throw "G06 $($asset.Label) asset must be $($asset.Width) x $($asset.Height)px" }
    $corners = @(
      $bitmap.GetPixel(0, 0).A,
      $bitmap.GetPixel(($bitmap.Width - 1), 0).A,
      $bitmap.GetPixel(0, ($bitmap.Height - 1)).A,
      $bitmap.GetPixel(($bitmap.Width - 1), ($bitmap.Height - 1)).A
    )
    if (($corners | Where-Object { $_ -ne 255 }).Count -ne 0) { throw "G06 $($asset.Label) outer corners must be opaque" }
  } finally {
    $bitmap.Dispose()
  }
}

Write-Output 'G06-SEARCH-FLOW-CONTRACT PASS'