#!/bin/sh
set -eu

TARGET="/usr/share/nginx/html/assets/assets/config/runtime_config.json"
mkdir -p "$(dirname "$TARGET")"

if command -v envsubst >/dev/null 2>&1; then
  envsubst < /opt/runtime_config.template.json > "$TARGET"
else
  cat > "$TARGET" <<JSON
{
  "firebase_api_key": "${FIREBASE_API_KEY:-}",
  "firebase_auth_domain": "${FIREBASE_AUTH_DOMAIN:-}",
  "firebase_project_id": "${FIREBASE_PROJECT_ID:-}",
  "firebase_storage_bucket": "${FIREBASE_STORAGE_BUCKET:-}",
  "firebase_messaging_sender_id": "${FIREBASE_MESSAGING_SENDER_ID:-}",
  "firebase_app_id": "${FIREBASE_APP_ID:-}",
  "firebase_measurement_id": "${FIREBASE_MEASUREMENT_ID:-}"
}
JSON
fi