$ErrorActionPreference = 'Stop'

$principal = New-Object Security.Principal.WindowsPrincipal(
    [Security.Principal.WindowsIdentity]::GetCurrent()
)

if (-not $principal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    $arguments = @(
        '-NoProfile',
        '-ExecutionPolicy', 'Bypass',
        '-File', ('"{0}"' -f $PSCommandPath)
    )
    Start-Process -FilePath 'powershell.exe' -Verb RunAs -ArgumentList $arguments -Wait
    exit $LASTEXITCODE
}

Write-Host 'Enabling Windows Subsystem for Linux...'
& dism.exe /online /enable-feature /featurename:Microsoft-Windows-Subsystem-Linux /all /norestart
if ($LASTEXITCODE -notin 0, 3010) { throw "DISM failed with exit code $LASTEXITCODE" }

Write-Host 'Enabling Virtual Machine Platform...'
& dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart
if ($LASTEXITCODE -notin 0, 3010) { throw "DISM failed with exit code $LASTEXITCODE" }

Write-Host ''
Write-Host 'Windows features are enabled. Restart Windows, then run:'
Write-Host '  .\02-install-and-build.ps1'