# caveman — installer shim (Windows / PowerShell).
#
# Thin wrapper around cli/install.js (the unified Node installer). Every flag
# you'd pass to cli/install.js can be passed here; we just forward them.
#
# One-line install:
#   irm https://raw.githubusercontent.com/JuliusBrussee/caveman/main/install.ps1 | iex
#
# Local clone:
#   pwsh install.ps1 [flags]
#
# Why a Node installer? install.sh + install.ps1 used to be parallel sources of
# truth and constantly drifted (issue #249 was a `node -e "..."` quoting bug
# that silently dropped the JSON merge step on every Windows install). One
# Node script works everywhere without quoting bugs.
#
# Why no top-level param() and everything inside a function? `irm | iex`
# executes this file as a string: script-path variables ($PSCommandPath,
# $MyInvocation.MyCommand.Path) are $null and a top-level param block cannot
# receive arguments through a pipe anyway (issue #565). Wrapping the logic in
# a function and forwarding $args keeps one script working for both the pipe
# path (no args, no script path) and the local-clone path.

function Install-Caveman {
  param(
    [string[]]$InstallerArgs = @()
  )

  $ErrorActionPreference = "Stop"
  $Repo = "JuliusBrussee/caveman"

  # Require Node ≥18.
  $node = Get-Command node -ErrorAction SilentlyContinue
  if (-not $node) {
    Write-Error @"
caveman: Node.js (>=18) required. Install:
  - winget install OpenJS.NodeJS.LTS
  - or download from https://nodejs.org
"@
    exit 1
  }

  $nodeMajor = [int](& node -p "process.versions.node.split('.')[0]")
  if ($nodeMajor -lt 18) {
    Write-Error "caveman: Node $nodeMajor too old. Need Node >=18. Upgrade: https://nodejs.org"
    exit 1
  }

  # If we're inside the repo clone, run the local installer directly.
  # $PSCommandPath is $null when piped to iex (#565) — the old unguarded
  # Split-Path on it was the "Cannot bind argument to parameter 'Path'
  # because it is null" crash.
  if ($PSCommandPath) {
    $here = Split-Path -Parent $PSCommandPath
    $local = Join-Path $here "cli/install.js"
    if (Test-Path $local) {
      & node $local @InstallerArgs
      exit $LASTEXITCODE
    }
  }

  # Curl-pipe path: delegate to npx.
  $npx = Get-Command npx -ErrorAction SilentlyContinue
  if (-not $npx) {
    Write-Error "caveman: npx required (ships with Node >=18). Reinstall Node.js."
    exit 1
  }

  # Do NOT pass `--` here — npm 7+ npx already forwards trailing args to the
  # package, and a literal `--` was tripping cli/install.js's parseArgs as an
  # unknown flag.
  # npm >=12 defaults allow-git to "none", failing github: specs with
  # EALLOWGIT (#698). Scope the override to this invocation.
  $env:NPM_CONFIG_ALLOW_GIT = "all"
  & npx -y "github:$Repo" @InstallerArgs
  exit $LASTEXITCODE
}

# $args is the automatic variable: populated when run as a file
# (`pwsh install.ps1 --force`), empty under `irm | iex`.
Install-Caveman -InstallerArgs $args