# Budget Pilot for Windows - one line in PowerShell (the HQ fills in its address and your key):
#   irm "https://<site>/install.ps1?key=<licence key>" | iex
# Remove it again:
#   irm "https://<site>/install.ps1?remove=1" | iex
# No admin rights: the program lives in %LOCALAPPDATA%\budget-pilot, Claude Code's hooks go into your own
# ~\.claude\settings.json, the meter starts with your Windows login (HKCU Run key, no window).
$ErrorActionPreference = "Stop"
$ProgressPreference = "SilentlyContinue"
$Server = "https://budgetpilot.net"
$Key = ""
$Remove = "0" -eq "1"
if ($env:BP_KEY) { $Key = $env:BP_KEY }
$P = Join-Path $env:LOCALAPPDATA "budget-pilot"
$Bin = Join-Path $P "bin"
$B = Join-Path $Bin "budget-pilot.exe"
$Run = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Run"
$Stamp = Get-Date -Format "yyyyMMdd-HHmmss"

function Stop-Meter {
  Get-Process -Name "budget-pilot" -ErrorAction SilentlyContinue | Stop-Process -Force -ErrorAction SilentlyContinue
  Start-Sleep -Milliseconds 500
}
function Drop-Link {
  # bin is a directory junction: rmdir takes the link away and never the version's files
  if (Test-Path $Bin) { cmd /c rmdir "$Bin" | Out-Null }
}
function Set-UserPath([bool]$add) {
  $cur = [Environment]::GetEnvironmentVariable("Path", "User")
  $parts = @($cur -split ";" | Where-Object { $_ -and ($_.TrimEnd("\") -ne $Bin) })
  if ($add) { $parts = @($Bin) + $parts }
  [Environment]::SetEnvironmentVariable("Path", ($parts -join ";"), "User")
  if ($add -and (($env:Path -split ";") -notcontains $Bin)) { $env:Path = "$Bin;$env:Path" }
}
function Start-Meter {
  $conhost = Join-Path $env:SystemRoot "System32\conhost.exe"
  if (Test-Path $conhost) {
    Set-ItemProperty -Path $Run -Name "Budget Pilot" -Value "`"$conhost`" --headless `"$B`" daemon"
    Start-Process -FilePath $conhost -ArgumentList "--headless", "`"$B`"", "daemon" -WindowStyle Hidden
  } else {
    Set-ItemProperty -Path $Run -Name "Budget Pilot" -Value "`"$B`" daemon"
    Start-Process -FilePath $B -ArgumentList "daemon" -WindowStyle Hidden
  }
}

if ($Remove) {
  Stop-Meter
  if (Test-Path $B) { & $B off | Out-Null }
  Remove-ItemProperty -Path $Run -Name "Budget Pilot" -ErrorAction SilentlyContinue
  Set-UserPath $false
  Drop-Link
  if (Test-Path (Join-Path $P "versions")) { Remove-Item -Recurse -Force (Join-Path $P "versions") }
  Write-Host "Budget Pilot removed (its hooks and settings are out of your AI tools' settings; the meter is stopped)."
  Write-Host "Your settings, log and memory (saved chat pieces) stay in $P (delete the folder if you like)."
  return
}

if (-not $Key -or $Key.StartsWith("__")) {      # no key in the link (the HQ fills in the one it was given)
  $kf = Join-Path $P "licence.key"
  if (Test-Path $kf) { $Key = (Get-Content $kf -Raw).Trim() } else { $Key = "" }
}
if (-not $Key) {
  Write-Host "Add your key: irm `"$Server/install.ps1?key=YOUR-KEY`" | iex   (get one at $Server)"
  return
}
$Tar = Join-Path $env:SystemRoot "System32\tar.exe"     # Windows' own tar (another tar on PATH may not take C:\)
if (-not (Test-Path $Tar)) {
  Write-Host "Budget Pilot needs Windows 10 (version 1803) or newer."
  return
}
$Tmp = Join-Path ([IO.Path]::GetTempPath()) ("budget-pilot-" + [Guid]::NewGuid().ToString("N"))
New-Item -ItemType Directory -Path $Tmp | Out-Null
try {
  Write-Host "Downloading Budget Pilot (Windows)..."
  try {
    Invoke-WebRequest -UseBasicParsing -Uri ("$Server/download/windows-x86_64?key=" + [Uri]::EscapeDataString($Key)) `
      -OutFile (Join-Path $Tmp "bp.tgz")
  } catch {
    $msg = $_.ErrorDetails.Message
    if (-not $msg) { $msg = $_.Exception.Message }
    Write-Host "Download refused: $msg"
    return
  }
  & $Tar -xzf (Join-Path $Tmp "bp.tgz") -C $Tmp
  $New = Join-Path $Tmp "budget-pilot"
  if (-not (Test-Path (Join-Path $New "budget-pilot.exe"))) { Write-Host "The download looks broken; please try again."; return }
  $V = (Get-Content (Join-Path $New "VERSION") -Raw).Trim()
  if ($V -notmatch '^\d+\.\d+\.\d+$') { Write-Host "The download looks broken; please try again."; return }
  $Vers = Join-Path $P "versions"
  New-Item -ItemType Directory -Force -Path $Vers | Out-Null
  Stop-Meter
  $Dest = Join-Path $Vers $V
  if (Test-Path $Dest) { Remove-Item -Recurse -Force $Dest }
  Move-Item $New $Dest
  Drop-Link
  New-Item -ItemType Junction -Path $Bin -Target $Dest | Out-Null
} finally {
  Remove-Item -Recurse -Force $Tmp -ErrorAction SilentlyContinue
}
if (-not (Test-Path $B)) { return }
if (Test-Path (Join-Path $Bin "LICENSE.txt")) { Copy-Item (Join-Path $Bin "LICENSE.txt") (Join-Path $P "LICENSE.txt") -Force }
& $B init-config $Server | Out-Null
& $B licence $Key
if ($LASTEXITCODE -ne 0) { return }
$cs = Join-Path $HOME ".claude\settings.json"
if (Test-Path $cs) { Copy-Item $cs (Join-Path $P "settings.backup.$Stamp.json") }
& $B config claude_settings user | Out-Null
& $B on
Set-UserPath $true
& $B link | Out-Null
Start-Meter
Start-Sleep -Seconds 3
if ([version]$V -ge [version]"4.3.0") { & $B screen } else { & $B status; Write-Host "All commands: budget-pilot help" }