param()

$ErrorActionPreference = "Stop"
$ProgressPreference = "SilentlyContinue"

$script:Stage = "init"
$script:LogFile = Join-Path $env:TEMP ("openclaw-uninstall-" + (Get-Date -Format "yyyyMMdd-HHmmss") + ".log")

try {
  Start-Transcript -Path $script:LogFile -Force | Out-Null
} catch {}

function Log($msg) {
  Write-Host "`n==> $msg" -ForegroundColor Cyan
}

function Warn($msg) {
  Write-Warning $msg
}

function Get-NpmCmd {
  $cmd = Get-Command npm.cmd -ErrorAction SilentlyContinue
  if ($cmd) { return $cmd.Source }

  $fallback = "C:\Program Files\nodejs\npm.cmd"
  if (Test-Path $fallback) { return $fallback }

  return $null
}

function Get-OpenClawCmd {
  $cmd = Get-Command openclaw.cmd -ErrorAction SilentlyContinue
  if ($cmd) { return $cmd.Source }

  $candidate = Join-Path $env:APPDATA "npm\openclaw.cmd"
  if (Test-Path $candidate) { return $candidate }

  return $null
}

function Uninstall-OpenClaw {
  $script:Stage = "uninstall-openclaw"

  $openclaw = Get-OpenClawCmd
  if ($openclaw) {
    Log "Removing Gateway service, state, and workspace"
    try {
      & $openclaw uninstall --all --yes --non-interactive
      if ($LASTEXITCODE -ne 0) {
        throw "openclaw uninstall exit code: $LASTEXITCODE"
      }
    } catch {
      Warn "openclaw uninstall failed: $($_.Exception.Message)"
    }
  } else {
    Warn "openclaw.cmd not found, skipping built-in uninstall"
  }

  $npm = Get-NpmCmd
  if ($npm) {
    Log "Removing global openclaw CLI"
    try {
      & $npm uninstall -g openclaw
      if ($LASTEXITCODE -ne 0) {
        throw "npm uninstall exit code: $LASTEXITCODE"
      }
    } catch {
      Warn "npm uninstall -g openclaw failed: $($_.Exception.Message)"
    }
  } else {
    Warn "npm.cmd not found, skipping CLI removal"
  }
}

function Main {
  Log "Log file: $script:LogFile"
  Uninstall-OpenClaw
  $script:Stage = "done"
  Log "Uninstall finished"
  Write-Host "OpenClaw uninstall steps are complete. Node was left installed." -ForegroundColor Green
}

try {
  Main
  exit 0
}
catch {
  Write-Error "[FAILED] stage=$script:Stage`n$($_.Exception.Message)"
  Write-Host "`nLog file: $script:LogFile" -ForegroundColor Yellow
  exit 1
}
finally {
  try { Stop-Transcript | Out-Null } catch {}
}