#!/usr/bin/env bash
# render-config.sh — turn *.tmpl files into real configs via envsubst.
# Substitutes ONLY ${BASE_DOMAIN} and ${HOST_LAN_IP} so literal $-syntax that
# belongs to the target file (dnsmasq, caddy, toml) is left untouched.
# Halts on any unset var or missing template (cautious: no half-rendered output).
set -euo pipefail

cd "$(dirname "$0")/.."   # repo root

[ -f .env ] && { set -a; . ./.env; set +a; }
: "${BASE_DOMAIN:?BASE_DOMAIN unset (set in .env)}"
: "${HOST_LAN_IP:?HOST_LAN_IP unset (set in .env)}"

render() {  # $1=template  $2=output
  [ -f "$1" ] || { echo "missing template: $1" >&2; exit 1; }
  envsubst '${BASE_DOMAIN} ${HOST_LAN_IP}' < "$1" > "$2"
  echo "rendered $2"
}

render drasl/config/config.toml.tmpl drasl/config/config.toml
render dnsmasq/dnsmasq.conf.tmpl      dnsmasq/dnsmasq.conf

# packwiz external-file metadata: render every pack/mods/*.pw.toml.tmpl into its
# .pw.toml (injects ${BASE_DOMAIN} into the download URL), then rebuild the
# packwiz index. .packwizignore keeps the .tmpl out of the index.
shopt -s nullglob
tmpls=(pack/mods/*.pw.toml.tmpl)
shopt -u nullglob
if [ "${#tmpls[@]}" -gt 0 ]; then
  for t in "${tmpls[@]}"; do render "$t" "${t%.tmpl}"; done
  command -v packwiz >/dev/null 2>&1 || { echo "packwiz not found — cannot refresh index" >&2; exit 1; }
  # index.toml is gitignored build output; seed a minimal one so packwiz refresh
  # (which won't bootstrap a missing index) has something to populate.
  [ -f pack/index.toml ] || printf 'hash-format = "sha256"\n' > pack/index.toml
  ( cd pack && packwiz refresh )
  echo "refreshed packwiz index (${#tmpls[@]} external metafiles)"
fi