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

out_dir=${1:-generated}
mkdir -p "$out_dir"

render_file() {
  template=$1
  output=$2
  if command -v envsubst >/dev/null 2>&1; then
    envsubst < "$template" > "$output"
  else
    cp "$template" "$output"
    printf 'WARN: envsubst is missing; copied template without substitution: %s\n' "$output" >&2
  fi
}

case "$out_dir" in
  generated|generated/*|rendered|rendered/*|local|local/*)
    ;;
  *)
    printf 'Refusing to render outside ignored output directories: %s\n' "$out_dir" >&2
    exit 2
    ;;
esac

render_file config/pds.env.example "$out_dir/pds.env"
render_file config/pds-backup.env.example "$out_dir/pds-backup.env"
render_file config/caddy-origin-ca.Caddyfile.example "$out_dir/Caddyfile"

printf 'Rendered config templates into %s\n' "$out_dir"