#!/usr/bin/env pwsh
# CASAN H5 Risk Registry Auto-Updater
# Usage:
#   update-risk-registry.ps1 -ActionName <name> [-DefaultRisk <low|medium|high>]
#
# If action not in registry, adds it with DefaultRisk (default: high = fail-secure).

param(
    [Parameter(Mandatory=$true)][string]$ActionName,
    [ValidateSet("low","medium","high")][string]$DefaultRisk = "high"
)

$scriptDir    = Split-Path $MyInvocation.MyCommand.Path -Parent
$projectRoot  = (Resolve-Path (Join-Path $scriptDir "../../..")).Path
$registryPath = Join-Path $projectRoot ".specify/governance/risk-registry.yaml"

if (!(Test-Path $registryPath)) {
    Write-Warning "Risk registry not found at $registryPath — skipping auto-update"
    exit 0
}

$content = Get-Content $registryPath -Raw
if ($content -match "(?m)^\s+-\s+id:\s+$([regex]::Escape($ActionName))") {
    Write-Output "RISK_REGISTRY_EXISTS: $ActionName already registered"
    exit 0
}

$timestamp = (Get-Date).ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ssZ")
$newEntry = @"

  - id: $ActionName
    risk_level: $DefaultRisk
    added_by: auto_update
    added_at: $timestamp
    note: "Auto-added (unknown action — defaulting to $DefaultRisk per fail-secure policy)"
"@

# Append before the last line (end of YAML file)
$lines = (Get-Content $registryPath) + $newEntry.Split("`n")
Set-Content -Path $registryPath -Value $lines -Encoding UTF8

Write-Warning "[RISK_REGISTRY] Auto-added unknown action '$ActionName' with risk_level=$DefaultRisk (fail-secure)"
Write-Output "RISK_REGISTRY_UPDATED: $ActionName risk=$DefaultRisk"