#!/usr/bin/env python
import os
import os.path
from time import localtime, strftime
import shutil
import jpgSorter
import numberOfFilesPerFolderLimiter
import exifread
from time import localtime, strftime, strptime, mktime


def getNumberOfFilesInFolderRecursively(start_path = '.'):
    numberOfFiles = 0
    for dirpath, dirnames, filenames in os.walk(start_path):
        for f in filenames:
            fp = os.path.join(dirpath, f)
            if(os.path.isfile(fp)):
                numberOfFiles += 1
    return numberOfFiles


def getNumberOfFilesInFolder(path):
    return len(os.listdir(path))


def log(logString):
    print(strftime("%H:%M:%S", localtime()) + ": " + logString)


def moveFile(file, destination):
    extension = os.path.splitext(file)[1][1:].upper()
    sourcePath = os.path.join(root, file)

    destinationDirectory = os.path.join(destination, extension)

    if not os.path.exists(destinationDirectory):
        os.mkdir(destinationDirectory)

    fileName = str(fileCounter) + "." + extension.lower()
    destinationFile = os.path.join(destinationDirectory, fileName)
    if not os.path.exists(destinationFile):
        shutil.copy(sourcePath, destinationFile)


def get_args():
    import argparse

    description = (
        "Sort files recoverd by Photorec.\n"
        "The input files are first copied to the destination, sorted by file type.\n"
        "Then JPG files are sorted based on creation year (and optionally month).\n"
        "Finally any directories containing more than a maximum number of files are accordingly split into separate directories."
    )

    parser = argparse.ArgumentParser(description=description, formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument('source', metavar='src', type=str, help='source directory with files recovered by Photorec')
    parser.add_argument('destination', metavar='dest', type=str, help='destination directory to write sorted files to')
    parser.add_argument('-n', '--max-per-dir', type=int, default=500, required=False, help='maximum number of files per directory')
    parser.add_argument('-m', '--split-months', action='store_true', required=False, help='split JPEG files not only by year but by month as well')
    parser.add_argument('-k', '--keep_filename', action='store_true', required=False, help='keeps the original filenames when copying')
    parser.add_argument('-d', '--min-event-delta', type=int, default=4, required=False, help='minimum delta in days between two days')
    parser.add_argument('-j', '--date_time_filename', action='store_true', required=False, help='sets the filename to the exif date and time if possible - otherwise keep the original filename')    

    return parser.parse_args()



maxNumberOfFilesPerFolder = 500
splitMonths = False
source = None
destination = None
keepFilename = False
date_time_filename = False

args = get_args()
source = args.source
destination = args.destination
maxNumberOfFilesPerFolder = args.max_per_dir
splitMonths = args.split_months
keepFilename = args.keep_filename
date_time_filename = args.date_time_filename
minEventDeltaDays = args.min_event_delta

print("Reading from source '%s', writing to destination '%s' (max %i files per directory, splitting by year %s)." %
    (source, destination, maxNumberOfFilesPerFolder, splitMonths and "and month" or "only"))
if keepFilename:
    print("I will keep you filenames as they are")
elif date_time_filename:
    print("If possible I will rename your files like <Date>_<Time>.jpg - otherwise keep the filenames as they are")
else:
    print("I will rename your files like '1.jpg'")

while ((source is None) or (not os.path.exists(source))):
    source = input('Enter a valid source directory\n')
while ((destination is None) or (not os.path.exists(destination))):
    destination = input('Enter a valid destination directory\n')

fileNumber = getNumberOfFilesInFolderRecursively(source)
if fileNumber > 100:
    onePercentFiles = int(fileNumber/100)
else:
    onePercentFiles = fileNumber
totalAmountToCopy = str(fileNumber)
print("Files to copy: " + totalAmountToCopy)


fileCounter = 0
for root, dirs, files in os.walk(source, topdown=False):

    for file in files:
        extension = os.path.splitext(file)[1][1:].upper()
        sourcePath = os.path.join(root, file)

        if extension:
            destinationDirectory = os.path.join(destination, extension)
        else:
            destinationDirectory = os.path.join(destination, "_NO_EXTENSION")

        if not os.path.exists(destinationDirectory):
            os.mkdir(destinationDirectory)
        
        if keepFilename:
            fileName = file
        
        elif date_time_filename:
            index = 0
            image = open(sourcePath, 'rb')
            exifTags = exifread.process_file(image, details=False)
            image.close()
            creationTime = jpgSorter.getMinimumCreationTime(exifTags)
            try:
                creationTime = strptime(str(creationTime), "%Y:%m:%d %H:%M:%S")
                creationTime = strftime("%Y%m%d_%H%M%S", creationTime)
                fileName = str(creationTime) + "." + extension.lower()
                while os.path.exists(os.path.join(destinationDirectory, fileName)):
                    index += 1
                    fileName = str(creationTime) + "(" + str(index) + ")" + "." + extension.lower()
            except:
                fileName = file

        else:
            if extension:
                fileName = str(fileCounter) + "." + extension.lower()
            else:
                fileName = str(fileCounter)

        destinationFile = os.path.join(destinationDirectory, fileName)
        if not os.path.exists(destinationFile):
            shutil.copy2(sourcePath, destinationFile)

        fileCounter += 1
        if((fileCounter % onePercentFiles) == 0):
            log(str(fileCounter) + " / " + totalAmountToCopy + " processed.")

log("start special file treatment")
jpgSorter.postprocessImages(os.path.join(destination, "JPG"), minEventDeltaDays, splitMonths)

log("assure max file per folder number")
numberOfFilesPerFolderLimiter.limitFilesPerFolder(destination, maxNumberOfFilesPerFolder)