#requires -Version 5.1
<#
.SYNOPSIS
  Compatibility wrapper for the Plan-21 global `casan init` workflow.

.DESCRIPTION
  New deployments should run `install.ps1` once and then `casan init` in each
  project. This wrapper remains for existing automation, but delegates all
  merge, pin, bootstrap, doctor, and VS Code behavior to the canonical CLI.
#>
[CmdletBinding()]
param(
  [ValidateSet('install', 'doctor', 'uninstall')] [string]$Action = 'install',
  [ValidateSet('claude', 'codex', 'vscode-copilot', 'all')] [string]$Client = 'all',
  [string]$Target = (Get-Location).Path,
  [ValidateSet('observe', 'enforce')] [string]$Mode = 'enforce'
)

$ErrorActionPreference = 'Stop'

function Resolve-Casan {
  $command = Get-Command casan -ErrorAction SilentlyContinue
  if ($command) { return $command.Source }
  $home = if ($env:CASAN_HOME) { $env:CASAN_HOME } else { Join-Path $env:LOCALAPPDATA 'casan' }
  $fallback = Join-Path $home 'bin\casan.cmd'
  if (Test-Path $fallback) { return $fallback }
  throw 'CASAN global launcher not found. Run install.ps1 first, then restart the shell.'
}

$casan = Resolve-Casan
$Target = (Resolve-Path $Target).Path

switch ($Action) {
  'install' {
    & $casan init --target $Target --client $Client --mode $Mode --non-interactive --vscode-install auto
    exit $LASTEXITCODE
  }
  'doctor' {
    & $casan doctor --target $Target --client $Client
    exit $LASTEXITCODE
  }
  'uninstall' {
    # Safe compatibility behavior: remove only CASAN handlers/recommendations.
    # Runtime evidence and pin/config are retained for audit/re-adoption.
    & $casan init --target $Target --client none --level 1 --non-interactive --vscode-install no
    if ($LASTEXITCODE -eq 0) {
      Write-Host '[casan] integrations disabled; audit state and .casan pin retained.'
    }
    exit $LASTEXITCODE
  }
}