# -*- coding: utf-8 -*-

#-------------------------------------------------------------------------
# drawElements Quality Program utilities
# --------------------------------------
#
# Copyright 2015 The Android Open Source Project
#
# 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
import time
import fnmatch

SRC_FILE_PATTERNS = [ "*.c", "*.h", "*.cpp", "*.hpp", "*.inl", "*.java", "*.aidl", "*.py" ]
COPYRIGHT_PATTERN = r'Copyright \(C\) ([0-9]{4})(-[0-9]{4})? drawElements Ltd.'
COPYRIGHT_REPLACEMENT = r'Copyright (C) \1-' + time.strftime("%Y") + r' drawElements Ltd.'

def isSrcFile (filename):
    for pattern in SRC_FILE_PATTERNS:
        if fnmatch.fnmatch(filename, pattern):
            return True
    return False

def findSrcFiles (dir):
    srcFiles = []
    for root, dirs, files in os.walk(dir):
        for file in files:
            if isSrcFile(file):
                srcFiles.append(os.path.join(root, file))
    return srcFiles

def processFile (filename):
    print(filename)
    file = open(filename, "rb")
    data = file.read()
    file.close()
    data = re.sub(COPYRIGHT_PATTERN, COPYRIGHT_REPLACEMENT, data)
    file = open(filename, "wb")
    file.write(data)
    file.close()

def processDir (dir):
    srcFiles = findSrcFiles(dir)
    for file in srcFiles:
        processFile(file)

if __name__ == "__main__":
    if len(sys.argv) < 2:
        print(sys.argv[0] + ": [directory]")
    else:
        processDir(sys.argv[1])