# install.ps1 — one-shot installer for Claude Code + a cmux-style terminal on Windows
#
#   irm https://YOUR-DOMAIN/install.ps1 | iex
#
# NOTE: cmux is a macOS-only app, so it cannot run on Windows. This installs
# Windows Terminal (tabs + split panes + notifications) as the closest native
# stand-in for running multiple AI coding agents side by side.
#
# Installs (only what's missing):
#   - Git for Windows        (required by Claude Code)
#   - Windows Terminal       (cmux stand-in)
#   - Claude Code            (the `claude` CLI)

$ErrorActionPreference = 'Stop'

function Say  ($m) { Write-Host "==> $m" -ForegroundColor Cyan }
function Ok   ($m) { Write-Host "OK  $m"  -ForegroundColor Green }
function Warn ($m) { Write-Host "!   $m"  -ForegroundColor Yellow }

# ---- preflight -----------------------------------------------------------
$build = [System.Environment]::OSVersion.Version.Build
if ($build -lt 17763) {
  Warn "Claude Code needs Windows 10 version 1809+ (build 17763). You have build $build."
}

if (-not (Get-Command winget -ErrorAction SilentlyContinue)) {
  throw "winget is required but not found. Install 'App Installer' from the Microsoft Store, then re-run this command."
}

function Ensure-Package($id, $name) {
  Say "Checking $name…"
  $present = winget list --id $id -e --accept-source-agreements 2>$null | Select-String -SimpleMatch $id
  if ($present) {
    Ok "$name already installed"
  } else {
    Say "Installing $name…"
    winget install --id $id -e --silent `
      --accept-source-agreements --accept-package-agreements
    Ok "$name installed"
  }
}

# ---- Git for Windows (required by Claude Code) ---------------------------
Ensure-Package "Git.Git" "Git for Windows"

# ---- Windows Terminal (cmux stand-in) ------------------------------------
Ensure-Package "Microsoft.WindowsTerminal" "Windows Terminal"

# ---- Claude Code ---------------------------------------------------------
if (Get-Command claude -ErrorAction SilentlyContinue) {
  Ok "Claude Code already installed"
} else {
  Say "Installing Claude Code…"
  Invoke-RestMethod https://claude.ai/install.ps1 | Invoke-Expression
}

# ---- done ----------------------------------------------------------------
Write-Host ""
Write-Host "All set!" -ForegroundColor Green
Write-Host @"

Next steps:
  1. Close and reopen Windows Terminal so PATH refreshes.
  2. Run:  claude
  3. The first run opens your browser to sign in.
     (Claude Code needs a Claude Pro/Max plan or an Anthropic API key.)

Tip: Windows Terminal gives you tabs (Ctrl+Shift+T) and split panes
     (Alt+Shift+D), so you can run several Claude agents side by side —
     the Windows stand-in for cmux.
"@