Import("env")
import os
import glob
import filecmp

def do_concat_cpp_files(cpp_files, output_file):
    with open(output_file, 'wb') as newf:
        for filename in cpp_files:
            with open(filename, 'rb') as hf:
                newf.write(hf.read())
                newf.write(os.linesep.encode())  # append newline to separate files.


def concat_cpp_files(path_to_concat):

    cpp_files = []

    cpp_path = path_to_concat

    cpp_path_out = '{}_tmp'.format(path_to_concat)

    if not os.path.exists(cpp_path_out):
        os.makedirs(cpp_path_out)

    tmp_cpp_file = os.path.join(cpp_path_out, '__tmpfile.cpp')
    tmp2_cpp_file = os.path.join(cpp_path_out, '__tmpfile.cpp.test')

    print("\u001b[32m Concat {}/*.cpp to {} \u001b[0m".format(cpp_path, tmp_cpp_file))


    for root, dirs, files in os.walk(cpp_path):
        for file in files:
            if file.endswith('.cpp'):
                fullname = os.path.join(root, file)
                cpp_files.append(fullname)
                print("\u001b[33m Add: \u001b[0m  {}".format(fullname))

    if os.path.exists(tmp_cpp_file):
        do_concat_cpp_files(cpp_files, tmp2_cpp_file)
            
        if filecmp.cmp(tmp_cpp_file, tmp2_cpp_file):
            print("\u001b[32m Files not changed, will not touch __tmpfile.cpp \u001b[0m")
            os.remove(tmp2_cpp_file)
        else:
            os.remove(tmp_cpp_file)
            os.rename(tmp2_cpp_file, tmp_cpp_file)
    else:
        do_concat_cpp_files(cpp_files, tmp_cpp_file)

    print("\u001b[32m ------------------------------- \u001b[0m")


concat_cpp_files('./src/src/Commands')
concat_cpp_files('./src/src/ControllerQueue')
concat_cpp_files('./src/src/DataStructs')
concat_cpp_files('./src/src/DataTypes')
concat_cpp_files('./src/src/ESPEasyCore')
concat_cpp_files('./src/src/Globals')
concat_cpp_files('./src/src/Helpers')
concat_cpp_files('./src/src/PluginStructs')
concat_cpp_files('./src/src/WebServer')