$ErrorActionPreference = 'Stop'

$root = Split-Path -Parent $PSScriptRoot
$manifest = 'design-pipeline/manifests/runtime-assets.json'
$validator = 'design-pipeline/scripts/validate-runtime-asset-inventory.mjs'

foreach ($relativePath in @($manifest, $validator)) {
  if (-not (Test-Path -LiteralPath (Join-Path $root $relativePath) -PathType Leaf)) {
    throw "缺少运行时资产合同文件：$relativePath"
  }
}

# 注册表是正式资产物理规格的唯一入口。递归验证同时拒绝缺失、循环、重复导入、重复 id 和重复 output。
$json = & node (Join-Path $root $validator) $manifest
if ($LASTEXITCODE -ne 0) { throw '运行时资产注册表验证失败' }
$inventory = $json | ConvertFrom-Json
$owned = @{}
foreach ($asset in $inventory.assets) {
  if ($owned.ContainsKey($asset.output)) { throw "运行时资产存在重复所有者：$($asset.output)" }
  $owned[$asset.output] = $asset
}

# static/assets 不允许存在“先留着再说”的文件：每个物理文件都必须有 owner，每个 owner 也必须有真实输出。
$physicalAssets = @(
  Get-ChildItem -LiteralPath (Join-Path $root 'static/assets') -Recurse -File |
    ForEach-Object { $_.FullName.Substring($root.Length + 1).Replace('\', '/') }
)
$unownedFiles = @($physicalAssets | Where-Object { -not $owned.ContainsKey($_) })
$missingFiles = @($owned.Keys | Where-Object { $_ -notin $physicalAssets })
if ($unownedFiles.Count -gt 0) { throw "存在未登记的 static/assets 文件：$($unownedFiles -join ', ')" }
if ($missingFiles.Count -gt 0) { throw "资产 owner 指向不存在的输出：$($missingFiles -join ', ')" }

Add-Type -AssemblyName System.Drawing
foreach ($asset in $inventory.assets) {
  $absolutePath = Join-Path $root $asset.output
  $image = [System.Drawing.Image]::FromFile($absolutePath)
  try {
    if ($image.Width -ne $asset.width -or $image.Height -ne $asset.height) {
      throw "运行时资产尺寸漂移：$($asset.output)"
    }
    $hasAlpha = [System.Drawing.Image]::IsAlphaPixelFormat($image.PixelFormat)
    if ($hasAlpha -ne [bool]$asset.alpha) {
      throw "运行时资产透明通道漂移：$($asset.output)"
    }
  } finally {
    $image.Dispose()
  }

  if ($asset.sha256) {
    $actualBytes = (Get-Item -LiteralPath $absolutePath).Length
    $actualHash = (Get-FileHash -Algorithm SHA256 -LiteralPath $absolutePath).Hash.ToLowerInvariant()
    if ($actualBytes -ne $asset.bytes -or $actualHash -ne $asset.sha256) {
      throw "直接提交的运行时资产发生漂移：$($asset.output)"
    }
  } elseif ((Get-Item -LiteralPath $absolutePath).Length -gt $asset.maxBytes) {
    throw "清单生成资产超过体积上限：$($asset.output)"
  }
}

# 消费者只从运行时代码中提取；清单、测试和文档本身不能替孤立输出制造虚假引用。
$referenceFiles = Get-ChildItem -LiteralPath @(
  (Join-Path $root 'pages'),
  (Join-Path $root 'components'),
  (Join-Path $root 'styles'),
  (Join-Path $root 'data'),
  (Join-Path $root 'utils')
) -Recurse -File | Where-Object { $_.Extension -in '.vue', '.scss', '.js' }

$referenceCounts = @{}
foreach ($output in $owned.Keys) { $referenceCounts[$output] = 0 }
foreach ($file in $referenceFiles) {
  $content = Get-Content -Raw -Encoding UTF8 -LiteralPath $file.FullName
  foreach ($match in [regex]::Matches($content, '/?static/assets/[A-Za-z0-9_./-]+\.(?:png|jpe?g|webp|svg)')) {
    $assetPath = $match.Value.TrimStart('/')
    if (-not $owned.ContainsKey($assetPath)) {
      throw "运行时代码引用了无 owner 的资产：$assetPath（$($file.FullName.Substring($root.Length + 1))）"
    }
    $referenceCounts[$assetPath]++
  }
}

$orphanedOutputs = @($referenceCounts.Keys | Where-Object { $referenceCounts[$_] -eq 0 })
if ($orphanedOutputs.Count -gt 0) {
  throw "资产清单保留了没有运行时消费者的输出：$($orphanedOutputs -join ', ')"
}

Write-Output "RUNTIME-ASSETS-CONTRACT PASS ($($owned.Count) assets)"