#!/usr/bin/env pwsh
# cruft installer for Windows — https://cruft.sh/install.ps1
#
#   powershell -c "irm cruft.sh/install.ps1 | iex"
#   $v="0.0.10"; powershell -c "irm cruft.sh/install.ps1 | iex"   # pin a version
#
# Downloads the prebuilt cruft binary for Windows from the npm registry (the same
# artifact `npm i -g cruftjs` uses — the registry is a plain HTTPS host, so this
# needs only PowerShell + tar, not node/npm) and installs it to ~\.cruft\bin.
# Override the location with $env:CRUFT_INSTALL. Pin a version with $v.

$ErrorActionPreference = "Stop"

# Version: $v if set, else "latest". Accept "v0.0.10" or "0.0.10".
$Version = if ($v) { $v } else { "latest" }
$Version = $Version -replace '^v', ''

# tar (bsdtar) ships with Windows 10 1803+ and is needed to unpack the .tgz.
if (-not (Get-Command tar -ErrorAction SilentlyContinue)) {
  Write-Host "error: tar is required (Windows 10 1803+ ships it). Please update Windows or install tar." -ForegroundColor Red
  exit 1
}

# Only a win32-x64 build is published. Windows on ARM runs x64 under emulation,
# so target win32-x64 there too.
$Arch = [System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture
if ($Arch -eq "Arm64") {
  Write-Host "note: no native Windows ARM64 build yet; installing the x64 build (runs under emulation)." -ForegroundColor DarkGray
}
$Target = "win32-x64"

$Registry = if ($env:CRUFT_NPM_REGISTRY) { $env:CRUFT_NPM_REGISTRY } else { "https://registry.npmjs.org" }
$Pkg = "@cruftless-dev/cruft-$Target"

# Resolve the version + tarball URL from the npm registry.
try {
  $Meta = Invoke-RestMethod -Uri "$Registry/$Pkg/$Version" -UseBasicParsing
} catch {
  Write-Host "error: No cruft release found for $Pkg@$Version (check the version, or your network)." -ForegroundColor Red
  exit 1
}
$Tarball = $Meta.dist.tarball
$Resolved = $Meta.version
if (-not $Tarball) {
  Write-Host "error: No prebuilt cruft binary found for $Target (version $Version)." -ForegroundColor Red
  exit 1
}

# Install locations.
$InstallDir = if ($env:CRUFT_INSTALL) { $env:CRUFT_INSTALL } else { Join-Path $HOME ".cruft" }
$BinDir = Join-Path $InstallDir "bin"
$Exe = Join-Path $BinDir "cruft.exe"
New-Item -ItemType Directory -Force -Path $BinDir | Out-Null

# Download + extract into a temp dir.
$Tmp = Join-Path ([System.IO.Path]::GetTempPath()) ("cruft-" + [System.Guid]::NewGuid().ToString("N"))
New-Item -ItemType Directory -Force -Path $Tmp | Out-Null
try {
  $Tgz = Join-Path $Tmp "cruft.tgz"
  Write-Host "Downloading cruft $Resolved for $Target..."
  Invoke-WebRequest -Uri $Tarball -OutFile $Tgz -UseBasicParsing
  tar -xzf $Tgz -C $Tmp
  $Src = Join-Path $Tmp "package\cruft.exe"
  if (-not (Test-Path $Src)) {
    Write-Host "error: archive did not contain the expected binary (cruft.exe)." -ForegroundColor Red
    exit 1
  }
  Copy-Item -Path $Src -Destination $Exe -Force
} finally {
  Remove-Item -Recurse -Force $Tmp -ErrorAction SilentlyContinue
}

Write-Host "cruft $Resolved was installed successfully to $Exe" -ForegroundColor Green

# Add the bin dir to the user PATH (persisted), if not already there.
$UserPath = [Environment]::GetEnvironmentVariable("Path", "User")
if ($UserPath -notlike "*$BinDir*") {
  $NewPath = if ([string]::IsNullOrEmpty($UserPath)) { $BinDir } else { "$BinDir;$UserPath" }
  [Environment]::SetEnvironmentVariable("Path", $NewPath, "User")
  # Reflect it in the current session too.
  $env:Path = "$BinDir;$env:Path"
  Write-Host "Added $BinDir to your user PATH." -ForegroundColor DarkGray
}
# Set CRUFT_INSTALL for the user so it matches the unix installer's convention.
[Environment]::SetEnvironmentVariable("CRUFT_INSTALL", $InstallDir, "User")

Write-Host ""
Write-Host "To get started, open a new terminal and run:"
Write-Host "  cruft --help"