from rich.console import Console
#from rich import inspect
import platform
from pathlib import Path
import os
import sys
import json
import argparse
import logging
import youtube_dl
from get_channels import retrieve_youtube_subscriptions
from print_logo import print_logo

if platform.system() == 'Windows':
    import msvcrt

    def uni_getch():
        char = str(msvcrt.getch())
        if char == "b'y'":
            return True
        elif char == "b'n'":
            return False
        else:
            return None
else:
    from getch import getch

    def uni_getch():
        char = getch()
        if char == "y":
            return True
        elif char == "n":
            return False
        else:
            return None

parser = argparse.ArgumentParser()
parser.add_argument('-i', '--input', action='store', type=str,
                    help='Path to json file generated by previously running this program.')
parser.add_argument('-o', '--output', action='store', type=str,
                    help='Output folder.')
parser.add_argument('-a', '--all', action='store_true',
                    help='Download all subscriptions.')
parser.add_argument('-f', '--format', action='store', type=str, default='best',
                    help='Format to pass to youtube-dl. (default: best)')

args = parser.parse_args()

json_input = args.input
output_dir = args.output or 'output'
download_all = args.all
dl_format = args.format

c = Console()


def prg_hook(d):
    if d['status'] == 'finished':
        sys.stdout.write("\033[F")
        sys.stdout.write("\033[K")
        c.print(
            ':white_check_mark: {}\n'.format(d['filename']))
    if d['status'] == 'downloading':
        sys.stdout.write("\033[F")
        sys.stdout.write("\033[K")
        c.print(':arrow_down_small: {} {} {}'.format(d['filename'],
                d['_percent_str'], d['_eta_str']))


ydl_opts = {
    'format': dl_format,
    'ignoreerrors': True,
    'continuedl': True,
    'quiet': True,
    'progress_hooks': [prg_hook]
}


print_logo()

if json_input:
    f = open(json_input, "r", encoding='utf-8')
    all_channels = json.loads(f.read())
    f.close()
else:
    all_channels = retrieve_youtube_subscriptions()
    curr_channel = 0
    c.print(
        f'You will be prompted if you want to download a channel for each of your subscriptions. (total {len(all_channels)})', style='bold')
    for ch in all_channels:
        if download_all:
            ch['download'] = True
        else:
            curr_channel += 1
            c.print(
                f'[dim][{curr_channel}/{len(all_channels)}]:[/dim] {ch["title"]} [cyan]\[y/n]')
            while True:
                key = uni_getch()
                if key == True:
                    ch['download'] = True
                    break
                elif key == False:
                    ch['download'] = False
                    break
                else:
                    c.print('Press "y" or "n"', style='yellow')

    c.print('All done! :party_popper:', style='green')
    c.print('Saving to download_list.json...', style='italic')
    f = open("download_list.json", "w", encoding='utf-8')
    f.write(json.dumps(all_channels, indent=4))
    f.close()

for ch in all_channels:
    if ch['download']:
        # line break so that download status won't clear this
        c.print('Downloading {}\n'.format(ch['title']), style='bold cyan')
        ydl_opts['outtmpl'] = '{}/{}/%(title)s.%(ext)s'.format(
            output_dir, ch['title'])
        with youtube_dl.YoutubeDL(ydl_opts) as ydl:
            Path(os.path.join(output_dir, ch['title'])).mkdir(
                parents=True, exist_ok=True)
            try:
                ydl.download(
                    ['https://www.youtube.com/channel/{}'.format(ch["id"])])
            except KeyboardInterrupt:
                c.print('\nGoodbye!', style='orange1')
                c.print(
                    'Start where you left off with "python main.py -i download_list.json"')
                sys.exit()