#!/usr/bin/env python2
import os
import re

def read_dbc(filename):
  with open(os.path.join(dir_name, filename), 'r') as file_in:
    return file_in.read()

cur_path = os.path.dirname(os.path.realpath(__file__))
generator_path = os.path.join(cur_path, '../')

include_pattern = r'CM_ "IMPORT (.*?)"'

for dir_name, _, filenames in os.walk(cur_path):
  if dir_name == cur_path:
    continue

  print dir_name

  for filename in filenames:
    if filename.startswith('_'):
      continue

    print filename
    dbc_file_in = read_dbc(filename) 

    includes = re.findall(include_pattern, dbc_file_in)
 
    output_filename = filename.replace('.dbc', '_generated.dbc')

    with open(os.path.join(generator_path, output_filename), 'w') as dbc_file_out:
      dbc_file_out.write('CM_ "AUTOGENERATED FILE, DO NOT EDIT"\n')

      for include_filename in reversed(includes):

        include_file_header = '\n\nCM_ "Imported file %s starts here"\n' % include_filename
        dbc_file_out.write(include_file_header)

        include_file = read_dbc(include_filename)
        dbc_file_out.write(include_file)

      dbc_file_out.write('\nCM_ "%s starts here"\n' % filename)
      dbc_file_out.write(dbc_file_in)