# Meris worker installer (Windows PowerShell).
#   $env:MERIS_CODE = 'ABCD-1234'; irm https://app.meris.network/install.ps1 | iex     install, pair and start
#   irm https://app.meris.network/install.ps1 | iex                                    install only
# Uses Node.js 22.4+ when it is installed; otherwise downloads a private copy into ~\.meris\node.
& {
  $ErrorActionPreference = 'Stop'
  $ProgressPreference = 'SilentlyContinue'
  [Net.ServicePointManager]::SecurityProtocol = [Net.ServicePointManager]::SecurityProtocol -bor [Net.SecurityProtocolType]::Tls12
  $Origin = 'https://app.meris.network'
  $Dir = Join-Path $HOME '.meris'
  $File = Join-Path $Dir 'meris-worker.mjs'
  New-Item -ItemType Directory -Force -Path $Dir | Out-Null
  Write-Host 'Setting up the Meris worker. This takes about a minute, keep this window open.'

  # No double quotes inside: Windows PowerShell 5.1 strips them when passing arguments to node.
  $check = 'const [a,b]=process.versions.node.split(/[.]/).map(Number);process.exit(a>22||(a===22&&b>=4)?0:1)'
  $Node = $null
  $system = Get-Command node -ErrorAction SilentlyContinue
  if ($system) {
    & $system.Source -e $check 2>$null
    if ($LASTEXITCODE -eq 0) { $Node = $system.Source }
  }
  $private = Join-Path $Dir 'node\node.exe'
  if (-not $Node -and (Test-Path $private)) { $Node = $private }
  if (-not $Node) {
    $cpu = if ($env:PROCESSOR_ARCHITECTURE -eq 'ARM64') { 'arm64' } else { 'x64' }
    $base = 'https://nodejs.org/dist/latest-v22.x'
    Write-Host 'Downloading Node.js 22 for the worker (about 30 MB)...'
    $sums = (Invoke-WebRequest -UseBasicParsing -Uri "$base/SHASUMS256.txt").Content -split "`n"
    $line = $sums | Where-Object { $_ -match "  node-v[0-9.]+-win-$cpu\.zip$" } | Select-Object -First 1
    if (-not $line) { Write-Host "Could not find Node.js for win-$cpu. Install Node.js 22 from https://nodejs.org and run this again."; return }
    $sum, $zip = $line.Trim() -split '\s+'
    $tmp = Join-Path ([IO.Path]::GetTempPath()) $zip
    Invoke-WebRequest -UseBasicParsing -Uri "$base/$zip" -OutFile $tmp
    if ((Get-FileHash -Algorithm SHA256 $tmp).Hash -ne $sum.ToUpper()) { Remove-Item $tmp; Write-Host 'The Node.js download was corrupted. Run this again.'; return }
    $unpack = Join-Path $Dir 'node-unpack'
    Remove-Item -Recurse -Force $unpack, (Join-Path $Dir 'node') -ErrorAction SilentlyContinue
    Expand-Archive -Path $tmp -DestinationPath $unpack
    Move-Item (Get-ChildItem $unpack | Select-Object -First 1).FullName (Join-Path $Dir 'node')
    Remove-Item -Recurse -Force $unpack, $tmp
    $Node = $private
  }

  Invoke-WebRequest -UseBasicParsing -Uri "$Origin/downloads/meris-worker.mjs" -OutFile $File
  # Relative paths keep the shortcut working for user folders with non-ASCII names.
  $launcher = if ($Node -eq $private) { '"%~dp0node\node.exe"' } else { 'node' }
  Set-Content -Encoding ascii -Path (Join-Path $Dir 'meris.cmd') -Value "@$launcher `"%~dp0meris-worker.mjs`" %*"
  Write-Host "Meris worker 0.2.0 installed."

  $code = $env:MERIS_CODE
  Remove-Item Env:\MERIS_CODE -ErrorAction SilentlyContinue
  if ($code) {
    $env:MERIS_INSTALLER = '1'
    & $Node $File pair $code
    if ($LASTEXITCODE -eq 0) { & $Node $File start }
    Remove-Item Env:\MERIS_INSTALLER -ErrorAction SilentlyContinue
  } elseif (Test-Path (Join-Path $Dir 'worker.json')) {
    & $Node $File start
  } else {
    Write-Host ''
    Write-Host "Copy the command from $Origin/worker instead: it includes your pairing code. Or pair by hand:"
    Write-Host '  ~\.meris\meris pair ABCD-1234'
    Write-Host '  ~\.meris\meris start'
  }
}