#!/usr/bin/env python
#
# Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.
#
# This python script creates a string literal in a C++ source file from a C++
# source template and text file.

import os
import sys
from os.path import join
import time
from optparse import OptionParser


def makeString(input_files):
  result = ' '
  for string_file in input_files:
    if string_file.endswith('dart'):
      fileHandle = open(string_file, 'rb')
      lineCounter = 0
      result += ' // ' + string_file + '\n   '
      for byte in fileHandle.read():
        result += ' %d,' % ord(byte)
        lineCounter += 1
        if lineCounter == 10:
          result += '\n   '
          lineCounter = 0
      if lineCounter != 0:
        result += '\n   '
  result += ' // Terminating null character.\n    0'
  return result


def makeFile(output_file, input_cc_file, include, var_name, input_files):
  bootstrap_cc_text = open(input_cc_file).read()
  bootstrap_cc_text = bootstrap_cc_text.replace("{{INCLUDE}}", include)
  bootstrap_cc_text = bootstrap_cc_text.replace("{{VAR_NAME}}", var_name)
  bootstrap_cc_text = bootstrap_cc_text.replace("{{DART_SOURCE}}",
      makeString(input_files))
  open(output_file, 'w').write(bootstrap_cc_text)
  return True


def main(args):
  try:
    # Parse input.
    parser = OptionParser()
    parser.add_option("--output",
                      action="store", type="string",
                      help="output file name")
    parser.add_option("--input_cc",
                      action="store", type="string",
                      help="input template file")
    parser.add_option("--include",
                      action="store", type="string",
                      help="variable name")
    parser.add_option("--var_name",
                      action="store", type="string",
                      help="variable name")

    (options, args) = parser.parse_args()
    if not options.output:
      sys.stderr.write('--output not specified\n')
      return -1
    if not len(options.input_cc):
      sys.stderr.write('--input_cc not specified\n')
      return -1
    if not len(options.include):
      sys.stderr.write('--include not specified\n')
      return -1
    if not len(options.var_name):
      sys.stderr.write('--var_name not specified\n')
      return -1
    if len(args) == 0:
      sys.stderr.write('No input files specified\n')
      return -1

    files = [ ]
    for arg in args:
      files.append(arg)

    if not makeFile(options.output,
                    options.input_cc,
                    options.include,
                    options.var_name,
                    files):
      return -1

    return 0
  except Exception, inst:
    sys.stderr.write('create_string_literal.py exception\n')
    sys.stderr.write(str(inst))
    sys.stderr.write('\n')
    return -1

if __name__ == '__main__':
  sys.exit(main(sys.argv))