$ErrorActionPreference = "Stop"
$Hub = if ($env:TEMP_REMOTE_TOOL_HUB) { $env:TEMP_REMOTE_TOOL_HUB } else { "https://down.luckyfound.info" }
$Token = $env:TEMP_REMOTE_TOOL_AGENT_TOKEN
if (-not $Token) { throw "TEMP_REMOTE_TOOL_AGENT_TOKEN required" }
$Work = if ($env:TEMP_REMOTE_TOOL_HOME) { $env:TEMP_REMOTE_TOOL_HOME } else { Join-Path $HOME ".temporary_remote_tool\go" }
New-Item -ItemType Directory -Force -Path $Work | Out-Null
$env:TEMP_REMOTE_TOOL_HUB = $Hub
$env:TEMP_REMOTE_TOOL_AGENT_TOKEN = $Token
$Bin = Join-Path $Work "temporary-remote-tool.exe"
$Url = $Hub.TrimEnd("/") + "/install/bin/go/windows/amd64"
try {
  Invoke-WebRequest -Uri $Url -OutFile $Bin
  & $Bin agent
  exit $LASTEXITCODE
} catch {
  if (-not (Get-Command go -ErrorAction SilentlyContinue)) { throw "no prebuilt binary and go not installed" }
  $Zip = Join-Path $Work "go.zip"
  $Src = Join-Path $Work "src"
  Invoke-WebRequest -Uri ($Hub.TrimEnd("/") + "/install/archive/go.zip") -OutFile $Zip
  if (Test-Path $Src) { Remove-Item -Recurse -Force $Src }
  New-Item -ItemType Directory -Force -Path $Src | Out-Null
  Expand-Archive -Path $Zip -DestinationPath $Src -Force
  Push-Location (Join-Path $Src "go_client")
  go build -o $Bin .
  Pop-Location
  & $Bin agent
}