param(
    [string]$ConfigPath = ".\ci\toolchain.json"
)

$config = Get-Content $ConfigPath | ConvertFrom-Json

$UnityVersion = $config.unityVersion
$UnityExe = Join-Path $config.unityRoot "$UnityVersion\Editor\Unity.exe"

Write-Host "Checking Unity $UnityVersion..."

if (!(Test-Path $UnityExe)) {
    throw "Unity version not installed: $UnityVersion"
}

Write-Host "Unity found: $UnityExe"

# expose for later steps
$env:UNITY_VERSION = $UnityVersion
$env:UNITY_EXE = $UnityExe

return $UnityExe