#!/usr/bin/python3
import argparse
import random
from argparse import ArgumentParser
from os import makedirs, path
from pathlib import Path

from moviepy.editor import *
from moviepy.video.io.ffmpeg_tools import ffmpeg_extract_subclip
from pymediainfo import MediaInfo


class Args:
    parser: ArgumentParser = argparse.ArgumentParser(
        description='Extracting mediainfo, sample and screens from random timecodes from video')
    parser.add_argument('-s', action='store_true', dest='screens', help="create screenshos")
    parser.add_argument('-c', action='store_true', dest='sample', help="extract sample")
    parser.add_argument('-m', action='store_true', dest='mediainfo', help='create mediainfo')
    parser.add_argument('-n', action='store', dest="count", default=10,
                        help="number of screenschots, default 10", type=int)
    parser.add_argument('-i', action='store', dest='input', help="input file", required=True)
    args = parser.parse_args()


def sample(fold, exname, max_time):
    """
    Create sample with duration 2m if file longer then 6m
    """

    print("sample")
    sam = fold + "/sample" + exname
    if max_time <= 360:
        ffmpeg_extract_subclip(Args.args.input, max_time / 3, max_time * 2 / 3, targetname=sam)
    else:
        ffmpeg_extract_subclip(Args.args.input, max_time / 2 - 60, max_time / 2 + 60, targetname=sam)


def info(mfile, media_info):
    print("Creating MediaInfo")
    # print(media_info)
    f = open(mfile, "w")
    f.write(str(media_info))
    f.close()


def screens(fold, max_time):

    print("Creating %s screenschots" % Args.args.count)
    i = 0
    max_time = round(max_time)
    print("Rounded duration %ss" % max_time)
    screen_create = VideoFileClip(Args.args.input)
    mintimescr = round(max_time * 0.05)
    maxtimescr = round(max_time * 0.95)

    while i < Args.args.count:
        i += 1
        time = random.randint(mintimescr, maxtimescr)
        imgname = fold + "/" + str(time) + ".png"
        print("%s at time %ds" % (i, time))
        screen_create.save_frame(imgname, t=time)

    screen_create.reader.close()
    screen_create.audio.reader.close_proc()


class Head:
    """
    Creates mediainfo, screenshots and sample from file
    """

    def __init__(self):
        bname: str

        bname = path.basename(Args.args.input)
        fname = path.splitext(bname)[0]
        exname = path.splitext(bname)[1]
        print("Filename is %s" % bname)
        fold = str(Path.home()) + "/samples/" + fname
        if path.isdir(fold):
            print("Directory %s is exist" % fold)
        else:
            try:
                makedirs(fold)
            except OSError:
                print("Creation of the directory %s failed" % fold)
            else:
                print("Successfully created the directory %s " % fold)
        print("\nFiles will be located at %s" % fold)
        media_info = MediaInfo.parse(Args.args.input, output="", parse_speed=2)
        mi = MediaInfo.parse(Args.args.input)
        mfile = fold + "/mediainfo.txt"
        duration = mi.tracks[0]
        max_time = duration.duration / 1000

        if Args.args.sample:
            sample(fold, exname, max_time)
        if Args.args.screens:
            screens(fold, max_time)
        if Args.args.mediainfo:
            info(mfile, media_info)


if __name__ == '__main__':
    Head()