#!/usr/bin/env python2.7
# Copyright (c) 2018 Google Inc.

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import os
import re
import sys

HEADER = """#include <string>

namespace media::audio {

static const std::string %s =
"""

FOOTER = """
}  // namespace media::audio
"""

def main():
  if len(sys.argv) != 3:
    print "Usage: %s <input_file> <output_file>" % (sys.argv[0], )
    exit(-1)

  lines = open(sys.argv[1], 'r').readlines()
  out = open(sys.argv[2], 'w')
  varname = re.sub('_([a-zA-Z0-9])',
                   lambda m: m.group(1).upper(),
                   'k_' + os.path.splitext(os.path.split(sys.argv[1])[1])[0])

  out.write(HEADER % (varname, ));

  for i in range(len(lines)):
    l = lines[i].replace('\n', '')   # Remove the trailing newline
    l = re.sub('//.*', '', l)        # Remove any comments
    l = re.sub('(^\s+|\s+$)', '', l) # Remove leading/trailing whitespace
    l = l.replace('"', '\\"')        # Escape all double-quotes

    # Skip empty lines
    if len(l) == 0:
      continue

    out.write('    "%s"' % (l, ))
    if ((i + 1) == len(lines)):
      out.write(';\n')
    else:
      out.write('\n')

  out.write(FOOTER)
  out.close()

if __name__ == '__main__':
  main()