import os
import datetime
from itertools import groupby
import sys

def main(argv):
    if os.path.exists(argv[0]):
        os.chdir(argv[0])

    absolutePath = os.path.abspath(os.curdir)
    files = os.listdir(absolutePath)

    for content, files in groupby(files, getFileContent):
        files = list(files)
        if len(files) > 1:
            files = sorted(files, key = lambda file: getModificationDate(file), reverse=True)
            mkdirIfDoesNotExist("duplikaty")
            for file in files[1:]:
                os.rename(file, "duplikaty/" + file)

    files = os.listdir(absolutePath)
    files = list(filter(lambda file: file != "duplikaty", files))
    for year, files in groupby(files, getFileYear):
        mkdirIfDoesNotExist(year)
        for month, files in groupby(files, getFileMonth):
            mkdirIfDoesNotExist(year + "/" + month)
            for file in files:
                os.rename(file, year + "/" + month + "/" + file)

def mkdirIfDoesNotExist(path):
    if not os.path.exists(path):
        os.mkdir(path)

def getModificationDate(file):
    timestamp = os.path.getmtime(file)
    modificationDate = datetime.datetime.fromtimestamp(timestamp)
    return modificationDate

def getFileYear(file):
    return str(getModificationDate(file).year)

def getFileMonth(file):
    return str(getModificationDate(file).month).zfill(2)

def getFileContent(filename):
    file = open(filename)
    content = file.read()
    file.close()
    return content
    
if __name__ == "__main__":
    main(sys.argv[1:])