#!/usr/bin/env bash

function error_handler() {
  >&2 echo "Exited with BAD EXIT CODE '${2}' in ${0} script at line: ${1}."
  exit "$2"
}
trap 'error_handler ${LINENO} $?' ERR
set -o errtrace -o errexit -o nounset -o pipefail

# sort of like https://lithic.tech/blog/2020-05/react-dynamic-config, but without golang
react_configs=$(env | grep -E "^SPIFFWORKFLOW_FRONTEND_RUNTIME_CONFIG_" || echo '')
if [[ -n "$react_configs" ]]; then
  index_html_file="./build/index.html"
  if [[ ! -f "$index_html_file" ]]; then
    >&2 echo "ERROR: Could not find '${index_html_file}'. Cannot use SPIFFWORKFLOW_FRONTEND_RUNTIME_CONFIG values without it."
    exit 1
  fi

  if ! command -v sed >/dev/null ; then
    >&2 echo "ERROR: sed command not found. Cannot use SPIFFWORKFLOW_FRONTEND_RUNTIME_CONFIG values without it."
    exit 1
  fi

  if ! command -v perl >/dev/null ; then
    >&2 echo "ERROR: perl command not found. Cannot use SPIFFWORKFLOW_FRONTEND_RUNTIME_CONFIG values without it."
    exit 1
  fi

  for react_config in $react_configs; do
    react_config_without_prefix=$(sed -E 's/^SPIFFWORKFLOW_FRONTEND_RUNTIME_CONFIG_([^=]*)=(.*)/\1=\\"\2\\"/' <<<"${react_config}")
    perl -pi -e "s/(window._jsenv=\{\})/\1;window._jsenv.${react_config_without_prefix}/" "$index_html_file"
  done
fi

exec ./node_modules/.bin/serve -s build -l "$PORT0"