#!/usr/bin/env bash
set -euo pipefail

ACTION="${1:-}"
if [[ -z "$ACTION" ]]; then
  echo "Usage: $0 <validate|plan|apply>"
  exit 1
fi

STACK_FILES=()
while IFS= read -r tg; do
  STACK_FILES+=("$tg")
done < <(find live -name 'terragrunt.hcl' -not -path '*/.terragrunt-cache/*' | sort)

if [[ ${#STACK_FILES[@]} -eq 0 ]]; then
  echo "No terragrunt stacks found under live/"
  exit 0
fi

for tg in "${STACK_FILES[@]}"; do
  stack_dir="$(dirname "$tg")"
  # Skip only root-level Terragrunt configuration file (live/terragrunt.hcl).
  # Execute concrete stacks like live/<component> and live/<group>/<component>.
  if [[ "$stack_dir" == "live" ]]; then
    continue
  fi

  echo "=== STACK: ${stack_dir} ==="

  (
    cd "$stack_dir"
    terragrunt init -upgrade -reconfigure

    if [[ "$ACTION" == "validate" ]]; then
      terragrunt validate
    elif [[ "$ACTION" == "plan" ]]; then
      terragrunt plan -out=tfplan
    elif [[ "$ACTION" == "apply" ]]; then
      terragrunt apply -auto-approve
    else
      echo "Unknown action: $ACTION"
      exit 1
    fi
  )
done