#!/usr/bin/env pwsh
# Copyright 2018 the Deno authors. All rights reserved. MIT license.
# Copyright 2022 justjavac. All rights reserved. MIT license.
# TODO(everyone): Keep this script simple and easily auditable.

$ErrorActionPreference = 'Stop'

$DvmDir = $env:DVM_DIR
$BinDir = if ($DvmDir) {
  "$DvmDir\bin"
} else {
  "$Home\.dvm\bin"
}

$DvmZip = "$BinDir\dvm.zip"
$DvmExe = "$BinDir\dvm.exe"
$DvmExeOldName = "dvm.exe.old"
$DvmExeOld = "$BinDir\$DvmExeOldName"
$DvmUri = "https://cdn.jsdelivr.net/gh/justjavac/dvm_releases@main/dvm-x86_64-pc-windows-msvc.zip"

if (!(Test-Path $BinDir)) {
  New-Item $BinDir -ItemType Directory | Out-Null
}

curl.exe -Lo $DvmZip $DvmUri

# Remove the old dvm.exe.old if it exists
Remove-Item $DvmExeOld -ErrorAction SilentlyContinue
# You cant delete a file that is currently running, so rename it
Rename-Item -Path $DvmExe -NewName $DvmExeOldName -ErrorAction SilentlyContinue

tar.exe xf $DvmZip -C $BinDir

Remove-Item $DvmZip

$User = [EnvironmentVariableTarget]::User
$Path = [Environment]::GetEnvironmentVariable('Path', $User)

if (!(";$Path;".ToLower() -like "*;$BinDir;*".ToLower())) {
  [Environment]::SetEnvironmentVariable('Path', "$Path;$BinDir", $User)
  $Env:Path += ";$BinDir"
}

Write-Output "Dvm was installed successfully to $DvmExe"
Invoke-Expression -Command "dvm doctor"
Write-Output "Run 'dvm --help' to get started"