import

#!/usr/bin/env bash

set -e

SOURCE_DIR="${BASH_SOURCE[0]%/*}"
TEMPLATE_FILE="${SOURCE_DIR}/template.bash"

IMPORT_FILE="${1:?Missing import file argument.}"

if ! [[ -f "${TEMPLATE_FILE}" ]]; then
  echo "could not find template file at '${TEMPLATE_FILE}'"
  exit 1
fi

TEMPLATE_CONTENT="$(< "${TEMPLATE_FILE}")"
TEMPLATE_CONTENT="$(echo "${TEMPLATE_CONTENT}" | sed -ne '1,/^# completion function$/p' | sed -e '$d')"

if ! [[ -f "${IMPORT_FILE}" ]]; then
  echo "could not find source file at '${IMPORT_FILE}'"
  exit 1
fi

IMPORT_CONTENT="$(< "${IMPORT_FILE}")"
IMPORT_CONTENT="$(echo "${IMPORT_CONTENT}" | sed -ne '/^# completion function$/,$p')"

NAMESPACE="$(echo "${IMPORT_CONTENT}" | sed -nEe 's/^# NAMESPACE=([^ $]*)$/\1/p')"
COMMAND="$(echo "${IMPORT_CONTENT}" | sed -nEe 's/^# COMMAND=([^ $]*)$/\1/p')"
EXECUTABLE="$(echo "${IMPORT_CONTENT}" | sed -nEe 's/^# EXECUTABLE="([^"$]*)"$/\1/p')"

if [[ -z "${NAMESPACE}" ]]; then
  echo "could not find NAMESPACE in source file or it has junk at the end"
  exit 1
fi

if [[ -z "${COMMAND}" ]]; then
  echo "could not find COMMAND in source file or it has junk at the end"
  exit 1
fi

if [[ -z "${EXECUTABLE}" ]]; then
  echo "could not find EXECUTABLE in source file or it has junk at the end"
  exit 1
fi

IMPORT_CONTENT="$(echo "${IMPORT_CONTENT}" | sed -e "s/^# NAMESPACE=${NAMESPACE}\$/# NAMESPACE={{bc_namespace}}/")"
IMPORT_CONTENT="$(echo "${IMPORT_CONTENT}" | sed -e "s/^# COMMAND=${COMMAND}\$/# COMMAND={{bc_command}}/")"
IMPORT_CONTENT="$(echo "${IMPORT_CONTENT}" | sed -e "s/^# EXECUTABLE=\"${EXECUTABLE}\"\$/# EXECUTABLE=\"{{bc_executable}}\"/")"

IMPORT_CONTENT="$(echo "${IMPORT_CONTENT}" | sed -e "s/command_current=${COMMAND} /command_current={{bc_command}} /")"

IMPORT_CONTENT="$(echo "${IMPORT_CONTENT}" | sed -e "s/_${NAMESPACE}__time ${EXECUTABLE}/_{{bc_namespace}}__time {{bc_executable}}/")"
IMPORT_CONTENT="$(echo "${IMPORT_CONTENT}" | sed -e "s/_${NAMESPACE}_${COMMAND}/_{{bc_namespace}}_{{bc_command}}/")"
IMPORT_CONTENT="$(echo "${IMPORT_CONTENT}" | sed -e "s/_${NAMESPACE}/_{{bc_namespace}}/")"

echo -e "${TEMPLATE_CONTENT}\n\n${IMPORT_CONTENT}" > "${TEMPLATE_FILE}"