$ErrorActionPreference = 'Stop'

function Assert-Match {
  param([string]$Content, [string]$Pattern, [string]$Message)
  if ($Content -notmatch $Pattern) { 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 $pattern) {
      throw "G01 empty state must not construct .$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)
$g01 = Get-Content -LiteralPath (Join-Path $root 'pages/genealogy/g01-my-genealogies.vue') -Raw -Encoding utf8
$runtimeSmoke = Get-Content -LiteralPath (Join-Path $root 'tests/g01-empty-state-runtime-smoke.js') -Raw -Encoding utf8
$panelPath = Join-Path $root 'static/assets/modules/genealogy/opaque/g01-empty-panel.png'
$framePath = Join-Path $root 'static/assets/modules/genealogy/transparent/g01-empty-panel-frame.png'
$pipelinePackage = Get-Content -LiteralPath (Join-Path $root 'design-pipeline/package.json') -Raw -Encoding utf8
$frameBuilderPath = Join-Path $root 'design-pipeline/scripts/build-g01-empty-frame.mjs'

if (-not ($paths -contains 'pages/genealogy/g01-my-genealogies')) { throw 'G01 route missing' }
if ($paths -contains 'pages/genealogy/g02-empty-genealogies') { throw 'G02 route must be removed; empty state belongs to G01' }

foreach ($required in @(
  'forceEmptyState',
  'query.get("state") || "default"',
  'empty-create-action',
  'empty-search-action',
  'empty-invite-action',
  'empty-create-note',
  'empty-panel__frame',
  'g01-empty-panel-frame.png',
  'const createGenealogy = () =>',
  '/pages/genealogy/g03-create-genealogy',
  '/pages/genealogy/g06-search-genealogies',
  'const hasGenealogies = computed(() => !forceEmptyState.value && list.value.length > 0);'
)) {
  if ($g01 -notmatch [regex]::Escape($required)) { throw "Missing G01 empty-state contract: $required" }
}

foreach ($required in @(
  'class="genealogy-fixed-zone"',
  'class="genealogy-list-scroll"',
  'scroll-y',
  ':scroll-top="listScrollCommand"',
  '@scroll="handleListScroll"',
  'const isListLayout = computed(',
  'const resetListScroll = async () =>'
)) {
  if ($g01 -notmatch [regex]::Escape($required)) { throw "Missing G01 split-scroll contract: $required" }
}

Assert-Match -Content $g01 -Pattern '(?s)<view class="genealogy-fixed-zone">.*class="current-slip".*class="shortcut-grid".*class="section-divider".*</view>\s*<scroll-view[^>]*class="genealogy-list-scroll"[^>]*>.*class="genealogy-lower".*</scroll-view>' -Message 'G01 fixed and scrolling regions are not separated correctly'
Assert-Match -Content $g01 -Pattern '(?s)\.genealogy-index--split\s*\{[^}]*height:\s*100vh;[^}]*padding-bottom:\s*calc\(112rpx\s*\+\s*env\(safe-area-inset-bottom\)\)' -Message 'G01 split layout must reserve the fixed tabbar and safe area'
Assert-Match -Content $g01 -Pattern '(?s)\.genealogy-list-scroll\s*\{[^}]*height:\s*0;[^}]*flex:\s*1;' -Message 'G01 list scroll region must consume the remaining computed height'
Assert-Match -Content $g01 -Pattern '(?s)<view v-else class="genealogy-empty-state">.*?<view class="empty-panel">\s*<image\s+class="empty-panel__frame"\s+src="/static/assets/modules/genealogy/transparent/g01-empty-panel-frame\.png"\s+mode="scaleToFill"\s*/>' -Message 'G01 empty state must render the exact extracted transparent frame without an opaque panel skin'
Assert-Match -Content $g01 -Pattern '(?s)\.empty-panel__frame\s*\{[^}]*position:\s*absolute;[^}]*inset:\s*0;[^}]*width:\s*100%;[^}]*height:\s*100%;[^}]*pointer-events:\s*none;' -Message 'G01 empty state transparent frame does not cover the approved panel slot'
Assert-Match -Content $g01 -Pattern '(?s)\.genealogy-empty-state\s*\{[^}]*min-height:\s*1120rpx;' -Message 'G01 empty state does not reserve the approved visibly fuller height'
Assert-Match -Content $g01 -Pattern '(?s)\.empty-panel\s*\{[^}]*height:\s*1120rpx;' -Message 'G01 empty panel does not use the approved visibly fuller height'
Assert-Match -Content $g01 -Pattern '(?s)\.empty-panel__content\s*\{[^}]*justify-content:\s*center;[^}]*padding:\s*50rpx 28rpx 46rpx;' -Message 'G01 empty panel content is not centered with the approved responsive padding'
Assert-Match -Content $g01 -Pattern '(?s)\.empty-seal\s*\{[^}]*width:\s*120rpx;[^}]*height:\s*184rpx;' -Message 'G01 empty seal does not use the approved prominent size'
Assert-Match -Content $g01 -Pattern '(?s)\.empty-title\s*\{[^}]*margin-top:\s*30rpx;[^}]*font-size:\s*48rpx;' -Message 'G01 empty title does not use the approved prominent size and spacing'
Assert-Match -Content $g01 -Pattern '(?s)\.empty-copy\s*\{[^}]*min-height:\s*84rpx;[^}]*margin-top:\s*18rpx;[^}]*font-size:\s*28rpx;' -Message 'G01 empty guidance does not use the approved prominent size and spacing'
Assert-Match -Content $g01 -Pattern '(?s)\.empty-search-action,\s*\.empty-invite-action\s*\{[^}]*width:\s*560rpx;[^}]*height:\s*124rpx;' -Message 'G01 empty actions do not use the approved prominent size'
Assert-Match -Content $g01 -Pattern '(?s)\.empty-search-action__copy,\s*\.empty-invite-action__copy\s*\{[^}]*font-size:\s*34rpx;' -Message 'G01 empty action labels do not use the approved prominent size'
Assert-Match -Content $g01 -Pattern '(?s)\.empty-create-action\s*\{[^}]*min-height:\s*76rpx;[^}]*margin-top:\s*14rpx;' -Message 'G01 empty create action does not use the approved prominent hit area and spacing'
Assert-Match -Content $g01 -Pattern '(?s)\.empty-create-action__copy\s*\{[^}]*font-size:\s*31rpx;' -Message 'G01 empty create action does not use the approved prominent size'
if ($g01 -match '(?s)\.empty-create-action__copy\s*\{[^}]*text-decoration:\s*underline') {
  throw 'G01 empty create action must not render a text underline'
}
Assert-Match -Content $g01 -Pattern '(?s)\.empty-create-note\s*\{[^}]*font-size:\s*26rpx;[^}]*line-height:\s*38rpx;' -Message 'G01 empty-state create note does not use the approved readable size'
if ($g01 -match '(?s)<view v-else class="genealogy-empty-state">.*?<image[^>]+g01-empty-panel\.png') { throw 'G01 empty state must not retain the opaque panel background' }

foreach ($className in @('empty-panel', 'empty-create-action', 'empty-search-action')) {
  Assert-NoCssSurface -Content $g01 -ClassName $className
}

if (-not (Test-Path -LiteralPath $panelPath)) { throw 'G01 requires its final raster empty-panel asset' }
if (-not (Test-Path -LiteralPath $framePath)) { throw 'G01 requires the extracted transparent empty-panel frame asset' }
if (-not (Test-Path -LiteralPath $frameBuilderPath)) { throw 'G01 transparent empty-panel frame must remain reproducible from its builder' }
Assert-Match -Content $pipelinePackage -Pattern '"build:g01-empty-frame"\s*:\s*"node scripts/build-g01-empty-frame\.mjs"' -Message 'G01 transparent frame builder is not exposed by the design pipeline'
Assert-Match -Content $runtimeSmoke -Pattern '\{\s*width:\s*412,\s*height:\s*1000\s*\}' -Message 'G01 runtime smoke must include the approved 412x1000 tall-screen stress viewport'
Add-Type -AssemblyName System.Drawing
$panel = [System.Drawing.Bitmap]::FromFile($panelPath)
try {
  if ($panel.Width -ne 1122 -or $panel.Height -ne 1402) { throw 'G01 empty-panel asset must remain 1122 x 1402px' }
  $corners = @(
    $panel.GetPixel(0, 0).A,
    $panel.GetPixel(($panel.Width - 1), 0).A,
    $panel.GetPixel(0, ($panel.Height - 1)).A,
    $panel.GetPixel(($panel.Width - 1), ($panel.Height - 1)).A
  )
  if (($corners | Where-Object { $_ -ne 255 }).Count -ne 0) { throw 'G01 empty-panel asset must have opaque outer corners' }
} finally {
  $panel.Dispose()
}

$frame = [System.Drawing.Bitmap]::FromFile($framePath)
try {
  if ($frame.Width -ne 1122 -or $frame.Height -ne 1402) { throw 'G01 transparent empty-panel frame must remain 1122 x 1402px' }
  foreach ($point in @(@(0, 0), @(1121, 0), @(0, 1401), @(1121, 1401), @(561, 701))) {
    if ($frame.GetPixel($point[0], $point[1]).A -ne 0) { throw 'G01 transparent empty-panel frame retains an opaque background pixel' }
  }
  $visible = 0
  for ($y = 0; $y -lt $frame.Height; $y += 4) {
    for ($x = 0; $x -lt $frame.Width; $x += 4) {
      if ($frame.GetPixel($x, $y).A -gt 0) { $visible++ }
    }
  }
  if ($visible -lt 1200 -or $visible -gt 12000) { throw "G01 transparent frame alpha coverage is implausible: $visible sampled pixels" }
} finally {
  $frame.Dispose()
}

Write-Output 'G01-EMPTY-STATE-CONTRACT PASS'