$ErrorActionPreference = 'Stop'

$root = Split-Path -Parent $PSScriptRoot
$errors = [System.Collections.Generic.List[string]]::new()

function Test-LocalImport {
  param(
    [string]$SourceFile,
    [string]$Target,
    [string[]]$Extensions
  )

  if ($Target -match '^(https?:|sass:)') { return $true }
  if ($Target.StartsWith('@/')) {
    $candidate = Join-Path $root $Target.Substring(2)
  } elseif ($Target.StartsWith('./') -or $Target.StartsWith('../')) {
    $candidate = Join-Path (Split-Path -Parent $SourceFile) $Target
  } else {
    return $true
  }

  if (Test-Path -LiteralPath $candidate) { return $true }
  foreach ($extension in $Extensions) {
    if (Test-Path -LiteralPath ($candidate + $extension)) { return $true }
  }
  return $false
}

$pages = Get-Content -Raw -Encoding UTF8 (Join-Path $root 'pages.json') | ConvertFrom-Json
foreach ($page in $pages.pages) {
  $pageFile = Join-Path $root ($page.path + '.vue')
  if (-not (Test-Path -LiteralPath $pageFile)) {
    $errors.Add("Route has no page file: $($page.path)")
  }
}

$manifest = Get-Content -Raw -Encoding UTF8 (Join-Path $root 'manifest.json') | ConvertFrom-Json
if ($manifest.vueVersion -eq '3' -and -not (Test-Path -LiteralPath (Join-Path $root 'index.html'))) {
  $errors.Add('Vue 3 project is missing index.html.')
}

$sourceFiles = Get-ChildItem -Path $root -Recurse -File | Where-Object {
  $_.FullName -notmatch '\\unpackage\\' -and $_.Extension -in '.vue', '.js', '.scss'
}

foreach ($source in $sourceFiles) {
  $content = Get-Content -Raw -Encoding UTF8 $source.FullName
  foreach ($match in [regex]::Matches($content, '@(?:import|use|forward)\s+["''](?<target>[^"'']+)["'']')) {
    $target = $match.Groups['target'].Value
    if (-not (Test-LocalImport -SourceFile $source.FullName -Target $target -Extensions @('.scss'))) {
      $errors.Add("Missing Sass import in $($source.FullName.Substring($root.Length + 1)): $target")
    }
  }
  foreach ($match in [regex]::Matches($content, '(?:from|import)\s+["''](?<target>[^"'']+)["'']')) {
    $target = $match.Groups['target'].Value
    if (-not (Test-LocalImport -SourceFile $source.FullName -Target $target -Extensions @('.js', '.vue', '.json'))) {
      $errors.Add("Missing module import in $($source.FullName.Substring($root.Length + 1)): $target")
    }
  }
}

if ($errors.Count -gt 0) {
  throw "Compile audit failed:`n$($errors -join "`n")"
}

Write-Output 'PASS compile audit'