param(
    [Parameter(Mandatory = $true)]
    [string]$WorkspaceRoot,

    [Parameter(Mandatory = $true)]
    [string]$DebugRoot
)

Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

function ConvertFrom-ExtendedWindowsPath {
    param([string]$Path)

    if ($Path.StartsWith("\\?\UNC\", [System.StringComparison]::OrdinalIgnoreCase)) {
        return "\\" + $Path.Substring(8)
    }
    if ($Path.StartsWith("\\?\", [System.StringComparison]::OrdinalIgnoreCase)) {
        return $Path.Substring(4)
    }
    return $Path
}

$workspacePath = ConvertFrom-ExtendedWindowsPath $WorkspaceRoot
$workspaceItem = Get-Item -LiteralPath $workspacePath
if (-not $workspaceItem.PSIsContainer) {
    throw "Workspace root is not a directory: $workspacePath"
}
$workspacePath = $workspaceItem.FullName

$debugPath = ConvertFrom-ExtendedWindowsPath $DebugRoot
$tempPath = [System.IO.Path]::GetFullPath([System.IO.Path]::GetTempPath()).TrimEnd("\")
$debugParent = [System.IO.Path]::GetFullPath((Split-Path -Parent $debugPath)).TrimEnd("\")
if (-not $debugParent.Equals($tempPath, [System.StringComparison]::OrdinalIgnoreCase)) {
    throw "Debug alias must be located directly below the user temp directory: $debugPath"
}

if (Test-Path -LiteralPath $debugPath) {
    $debugItem = Get-Item -LiteralPath $debugPath -Force
    if ($debugItem.LinkType -ne "Junction") {
        throw "Debug alias exists but is not a junction: $debugPath"
    }

    $currentTarget = (Get-Item -LiteralPath $debugItem.Target).FullName
    if (-not $currentTarget.Equals($workspacePath, [System.StringComparison]::OrdinalIgnoreCase)) {
        # Removing a junction removes only the link, never the target directory.
        Remove-Item -LiteralPath $debugPath -Force
    }
}

if (-not (Test-Path -LiteralPath $debugPath)) {
    New-Item -ItemType Junction -Path $debugPath -Target $workspacePath | Out-Null
}

Write-Output "Debug extension path: $debugPath -> $workspacePath"
& npm.cmd --prefix $workspacePath run compile:debug
exit $LASTEXITCODE