# This file is NOT licensed under the GPLv3, which is the license for the rest
# of YouCompleteMe.
#
# 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.
#
# For more information, please refer to <http://unlicense.org/>

import os
import re
import subprocess
import pybind11


def LoadSystemIncludes():
    regex = re.compile(r'(?:\#include \<...\> search starts here\:)'
                       r'(?P<list>.*?)(?:End of search list)', re.DOTALL)
    process = subprocess.Popen(['clang', '-v', '-E', '-x', 'c++', '-'],
                               stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                               stderr=subprocess.PIPE)
    process_out, process_err = process.communicate('')
    output = process_out + process_err
    output = output.decode('utf-8')
    includes = []
    for p in re.search(regex, output).group('list').split('\n'):
        p = p.strip()
        if len(p) > 0 and p.find('(framework directory)') < 0:
            includes.append('-isystem')
            includes.append(p)
    return includes


# These are the compilation flags that will be used in case there's no
# compilation database set (by default, one is not set).
# CHANGE THIS LIST OF FLAGS. YES, THIS IS THE DROID YOU HAVE BEEN LOOKING FOR.
flags = [
    '-Wall',
    '-Wextra',
    '-Werror',
    '-Wno-long-long',
    '-fexceptions',
    '-x',
    'c++',
    '-std=c++14',
    '-stdlib=libc++',
    '-I',
    pybind11.get_include(),
    '-I',
    pybind11.get_include(True),
    '-I',
    'vendor/'
]

systemIncludes = LoadSystemIncludes()
flags = flags + systemIncludes

# Set this to the absolute path to the folder (NOT the file!) containing the
# compile_commands.json file to use that instead of 'flags'. See here for
# more details: http://clang.llvm.org/docs/JSONCompilationDatabase.html
#
# You can get CMake to generate this file for you by adding:
#   set( CMAKE_EXPORT_COMPILE_COMMANDS 1 )
# to your CMakeLists.txt file.
#
# Most projects will NOT need to set this to anything; you can just change the
# 'flags' list of compilation flags. Notice that YCM itself uses that approach.
database = None

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


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


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 FlagsForFile( filename, **kwargs ):
    relative_to = DirectoryOfThisScript()
    final_flags = MakeRelativePathsInFlagsAbsolute( flags, relative_to )

    return { 'flags': final_flags }


Add YouCompleteMe config for vim autocompletion