# HomeRMM agent installer for Windows
# Usage: irm https://homermm.mk03.uk/install/agent.ps1 | iex
# The enrollment token is optional — without one, the agent waits for approval in the console.
$ErrorActionPreference = 'Stop'
$Server = 'https://homermm.mk03.uk'
$Token = ''
if ($env:HOMERMM_TOKEN) { $Token = $env:HOMERMM_TOKEN }
elseif ($env:HOMMR_TOKEN) { $Token = $env:HOMMR_TOKEN }

$Root = Join-Path $env:ProgramData 'HomeRMM\agent'
New-Item -ItemType Directory -Force -Path $Root | Out-Null
$Zip = Join-Path $Root 'agent.zip'
Write-Host "Downloading agent from $Server ..."
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
try {
  Invoke-WebRequest -Uri "$Server/install/agent.zip" -OutFile $Zip -UseBasicParsing
} catch {
  Invoke-WebRequest -Uri "$Server/install/agent.zip" -OutFile $Zip -UseBasicParsing -SkipCertificateCheck
}

Expand-Archive -Path $Zip -DestinationPath $Root -Force

$Node = Get-Command node -ErrorAction SilentlyContinue
$Npm = Get-Command npm -ErrorAction SilentlyContinue
$NodeExe = $null
$NpmCmd = $null
if ($Node) { $NodeExe = $Node.Source }
if ($Npm) { $NpmCmd = $Npm.Source }
if (-not $NodeExe) {
  Write-Host 'Node.js not found on PATH. Downloading portable Node.js ...'
  $NodeVer = 'v20.18.1'
  $NodeZip = Join-Path $Root 'node.zip'
  $NodeUrl = "https://nodejs.org/dist/$NodeVer/node-$NodeVer-win-x64.zip"
  Invoke-WebRequest -Uri $NodeUrl -OutFile $NodeZip -UseBasicParsing
  Expand-Archive -Path $NodeZip -DestinationPath $Root -Force
  $NodeDir = Join-Path $Root "node-$NodeVer-win-x64"
  $NodeExe = Join-Path $NodeDir 'node.exe'
  $NpmCmd = Join-Path $NodeDir 'npm.cmd'
}
Write-Host 'Installing agent libraries ...'
Push-Location $Root
try {
  if ($NpmCmd) { & $NpmCmd install --omit=dev }
} finally { Pop-Location }

$Config = @{
  server = 'auto'
  fallback = 'https://homermm.mk03.uk'
  token = $Token
  name = $env:COMPUTERNAME
} | ConvertTo-Json
Set-Content -Path (Join-Path $Root 'agent.json') -Value $Config -Encoding UTF8

$Action = New-ScheduledTaskAction -Execute $NodeExe -Argument 'index.js' -WorkingDirectory $Root
$Trigger = New-ScheduledTaskTrigger -AtLogOn
$Principal = New-ScheduledTaskPrincipal -UserId $env:USERNAME -LogonType Interactive -RunLevel Highest
try {
  Unregister-ScheduledTask -TaskName 'HomeRMM Agent' -Confirm:$false -ErrorAction SilentlyContinue
  Unregister-ScheduledTask -TaskName 'HomerMM Agent' -Confirm:$false -ErrorAction SilentlyContinue
} catch {}
Register-ScheduledTask -TaskName 'HomeRMM Agent' -Action $Action -Trigger $Trigger -Principal $Principal -Force | Out-Null
Start-ScheduledTask -TaskName 'HomeRMM Agent'
Write-Host "HomeRMM agent installed in $Root and started."
Write-Host 'Remote desktop works best when the agent runs in the logged-in user session (this installer does that).'