# MeowByte Code installer for Windows.
#
#   irm https://ai.meowbyte.net/install.ps1 | iex
#
# Downloads the standalone meowbyte.exe, checks it against the SHA-256 published in the release
# manifest, installs it to %USERPROFILE%\.meowbyte\bin and adds that folder to your user PATH.
# No admin rights, Node or package manager needed.
$ErrorActionPreference = 'Stop'
# Windows PowerShell 5.1's progress bar makes large downloads many times slower.
$ProgressPreference = 'SilentlyContinue'

$Api = if ($env:MEOWBYTE_API_URL) { $env:MEOWBYTE_API_URL } else { 'https://backend.meowbyte.net' }
$Dir = if ($env:MEOWBYTE_INSTALL_DIR) { $env:MEOWBYTE_INSTALL_DIR } else { Join-Path $env:USERPROFILE '.meowbyte\bin' }

if (-not [Environment]::Is64BitOperatingSystem) { throw 'MeowByte Code needs 64-bit Windows.' }
# There's no Windows ARM build yet; Windows on ARM runs the x64 build under emulation.
$Key = 'windows-x64'

$Manifest = Invoke-RestMethod -Uri "$Api/cli/releases/latest.json" -UseBasicParsing
$Entry = $Manifest.files.$Key
if (-not $Entry) { throw "No build for $Key in the latest release." }

Write-Host "Downloading MeowByte Code $($Manifest.version)..."
$Tmp = Join-Path $env:TEMP ("meowbyte-" + [guid]::NewGuid().ToString() + '.exe')
Invoke-WebRequest -Uri "$Api/cli/releases/$($Entry.path)" -OutFile $Tmp -UseBasicParsing

$Actual = (Get-FileHash -Path $Tmp -Algorithm SHA256).Hash.ToLower()
if ($Actual -ne $Entry.sha256) {
	Remove-Item $Tmp -Force
	throw "The download didn't match its published checksum - not installing it."
}

New-Item -ItemType Directory -Force -Path $Dir | Out-Null
$Target = Join-Path $Dir 'meowbyte.exe'
# A running meowbyte.exe can't be overwritten, but it can be moved aside.
if (Test-Path "$Target.old") { Remove-Item "$Target.old" -Force -ErrorAction SilentlyContinue }
if (Test-Path $Target) { Move-Item $Target "$Target.old" -Force }
Move-Item $Tmp $Target -Force
Write-Host "Installed $Target"

$UserPath = [Environment]::GetEnvironmentVariable('Path', 'User')
if (-not $UserPath) { $UserPath = '' }
if (($UserPath -split ';') -notcontains $Dir) {
	[Environment]::SetEnvironmentVariable('Path', ($UserPath.TrimEnd(';') + ';' + $Dir).TrimStart(';'), 'User')
	$env:Path = "$env:Path;$Dir"
	Write-Host "Added $Dir to your PATH. New terminals will find meowbyte automatically."
}

Write-Host ''
Write-Host 'Next: run "meowbyte login", then "meowbyte" inside a project.'