# Here's the license text for this file:
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
#
# In jurisdictions that recognize copyright laws, the author or authors
# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
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# For more information, please refer to <http://unlicense.org/>

import os
import ycm_core

flags = [
'-std=c++14',
'-Wall',
'-Wextra',
]

compilation_database_folder = ''

if os.path.exists( compilation_database_folder ):
  database = ycm_core.CompilationDatabase( compilation_database_folder )
else:
  database = None

SOURCE_EXTENSIONS = ['.cpp', '.cxx', '.cc', '.c', '.m', '.mm']

def DirectoryOfThisScript():
  return os.path.dirname( os.path.abspath( __file__ ) )

flags.append('-I'+ DirectoryOfThisScript() +'/src')
flags.append('-I'+ DirectoryOfThisScript() +'/include')
flags.append('-I'+ DirectoryOfThisScript() +'/lib/concurrentqueue/include')
flags.append('-I'+ DirectoryOfThisScript() +'/lib/i3ipcpp/include')
flags.append('-I'+ DirectoryOfThisScript() +'/lib/xpp/include')
flags.append('-I'+ DirectoryOfThisScript() +'/tests')
flags.append('-I/usr/include/freetype2')
flags.append('-I/usr/include')

def MakeRelativePathsInFlagsAbsolute( flags, working_directory ):
  if not working_directory:
    return list( flags )
  new_flags = []
  make_next_absolute = False
  path_flags = [ '-isystem', '-I', '-iquote', '--sysroot=' ]
  for flag in flags:
    new_flag = flag

    if make_next_absolute:
      make_next_absolute = False
      if not flag.startswith( '/' ):
        new_flag = os.path.join( working_directory, flag )

    for path_flag in path_flags:
      if flag == path_flag:
        make_next_absolute = True
        break

      if flag.startswith( path_flag ):
        path = flag[ len( path_flag ): ]
        new_flag = path_flag + os.path.join( working_directory, path )
        break

    if new_flag:
      new_flags.append( new_flag )
  return new_flags

def IsHeaderFile( filename ):
  extension = os.path.splitext( filename )[ 1 ]
  return extension in [ '.h', '.hxx', '.hpp', '.hh' ]

def GetCompilationInfoForFile( filename ):
  # The compilation_commands.json file generated by CMake does not have entries
  # for header files. So we do our best by asking the db for flags for a
  # corresponding source file, if any. If one exists, the flags for that file
  # should be good enough.
  if IsHeaderFile( filename ):
    basename = os.path.splitext( filename )[ 0 ]
    for extension in SOURCE_EXTENSIONS:
      replacement_file = basename + extension
      if os.path.exists( replacement_file ):
        compilation_info = database.GetCompilationInfoForFile(
          replacement_file )
        if compilation_info.compiler_flags_:
          return compilation_info
    return None
  return database.GetCompilationInfoForFile( filename )


def FlagsForFile( filename, **kwargs ):
  # if database:
  #   # Bear in mind that compilation_info.compiler_flags_ does NOT return a
  #   # python list, but a "list-like" StringVec object
  #   compilation_info = GetCompilationInfoForFile( filename )
  #   if not compilation_info:
  #     return None
  #
  #   final_flags = MakeRelativePathsInFlagsAbsolute(
  #     compilation_info.compiler_flags_,
  #     compilation_info.compiler_working_dir_ )
  #
  #   # NOTE: This is just for YouCompleteMe; it's highly likely that your project
  #   # does NOT need to remove the stdlib flag. DO NOT USE THIS IN YOUR
  #   # ycm_extra_conf IF YOU'RE NOT 100% SURE YOU NEED IT.
  #   try:
  #     final_flags.remove( '-stdlib=libc++' )
  #   except ValueError:
  #     pass
  # else:
  relative_to = DirectoryOfThisScript()
  final_flags = MakeRelativePathsInFlagsAbsolute( flags, relative_to )

  return {
    'flags': final_flags,
    'do_cache': True
  }