#!/usr/bin/env python3
from datetime import datetime, timedelta
import itertools
import math
import re
import os
import shlex
import subprocess
import sys
import tempfile

import click
try:
    import dvdread
    HAS_DVDREAD = True
except ImportError:
    HAS_DVDREAD = False


FILE_TYPE = click.Path(file_okay=True, dir_okay=False, exists=True)
NEW_FILE_TYPE = click.Path(file_okay=True, dir_okay=False, exists=False)
DIRECTORY_TYPE = click.Path(file_okay=False, dir_okay=True, exists=True)
DEVICE_OR_DIRECTORY_TYPE = click.Path(file_okay=True, dir_okay=True,
                                      exists=True)


@click.group()
def cli():
    pass


def with_fifo(func):
    def f(*args, **kwargs):
        with tempfile.TemporaryDirectory() as tmpdir:
            fifo_path = os.path.join(tmpdir, 'rip.fifo')
            try:
                os.mkfifo(fifo_path)
            except FileExistsError:
                pass
            kwargs['fifo_path'] = fifo_path
            return func(*args, **kwargs)
    return f


def _get_audio_map(title=None, mpv_output=None, device=None):
    # FIXME this doesn't always work. ffmpeg seems to order audio stream the
    # other way around or something
    if (None, None) == (title, mpv_output):
        raise RuntimeError('Either `title` or `mpv_output` is required.')

    if mpv_output is None:
        mpv_cmd = ['mpv', '--quiet', '--frames=0',
                   'dvd://{}'.format(title)]
        if device:
            mpv_cmd.append('--dvd-device={}'.format(device))
        mpv_output = subprocess.check_output(mpv_cmd,
                                             stderr=subprocess.DEVNULL)
        mpv_output = mpv_output.decode('utf-8')

    audio_map = []
    for line in mpv_output.splitlines():
        # [dvd] audio stream: 0 format: mpeg1 (stereo) language: de aid: 0.
        # FIXME use the aid as ffmpeg should support -map i:0x80, too
        # or another one
        # [dvd] audio stream: 0 format: ac3 (5.1) language: de aid: 128.
        # [dvd] audio stream: 1 format: ac3 (5.1) language: en aid: 129.
        m = re.match(r'\[dvd\] audio stream: (\d+) .* language: (\S+) .*',
                     line)
        if m:
            audio_map.append((int(m.group(1)), m.group(2)))

    if not audio_map:
        print('#' * 15)
        print('WARNING: Could not find any audio streams.')
        print('#' * 15)

    return audio_map


def _get_audios(title, device):
    if HAS_DVDREAD:
        with dvdread.DVD(device) as d:
            d.Open()

            if not 0 <= title <= d.NumberOfTitles:
                msg = 'Number of titles of of range. Use a number in [0, {}['
                raise click.ClickException(msg.format(d.NumberOfTitles))

            # DvdRead starts counting titles at 1, we start at 0
            title += 1
            t = d.GetTitle(title)
            audio_map = []
            for i in range(1, t.NumberOfAudios + 1):
                a = t.GetAudio(i)
                audio_map.append((128 + i - 1, a.LangCode))
            return audio_map
    else:
        # FIXME can this be _get_audio_map?
        raise NotImplementedError(
            'Need to do this via ffmpeg/ffprobe/mpv '
            'somehow. Make sure you make sense of mpv showing the audio '
            'streams in another order than they appear in the file in the '
            'end ..')


def _get_subtitles(title, device):
    if HAS_DVDREAD:
        with dvdread.DVD(device) as d:
            d.Open()

            if not 0 <= title <= d.NumberOfTitles:
                msg = 'Number of titles of of range. Use a number in [0, {}['
                raise click.ClickException(msg.format(d.NumberOfTitles))

            # DvdRead starts counting titles at 1, we start at 0
            title += 1
            t = d.GetTitle(title)
            subtitles = []
            for i in range(1, t.NumberOfSubpictures + 1):
                s = t.GetSubpicture(i)
                subtitles.append((0x20 + i - 1, s.LangCode))
            return subtitles
    else:
        raise NotImplementedError()


def _get_parameterized_ffmpeg_cmd(media_type, quality, extra_opts, use_gpu,
                                  audio_map, subtitle_map, pre_read=1024):
    ffmpeg_cmd = []
    ffmpeg_cmd.append(['ffmpeg',
                       '-probesize', '{}M'.format(pre_read),
                       '-analyzeduration', '{}M'.format(pre_read),
                       '-hwaccel', 'auto',
                       '-i'])

    ffmpeg_cmd.append(extra_opts)
    ffmpeg_cmd[-1].extend(['-map', '0:v:0'])
    if '-c:a' not in ffmpeg_cmd[-1]:
        ffmpeg_cmd[-1].extend(['-c:a', 'copy'])
    ffmpeg_cmd[-1].extend(['-c:s', 'copy'])
    if use_gpu:
        ffmpeg_cmd[-1] += [
            '-c:v', 'h264_nvenc',
            '-rc', 'vbr_hq',
            '-rc-lookahead', '20',
            '-cq', '{}'.format(quality),
            # '-maxrate:v', '3M',
            # '-b:v', '8M', '-maxrate:v', '10M',
            '-preset:v', 'slow']
    else:
        ffmpeg_cmd[-1] += [
            '-c:v', 'h264',
            '-crf', '{}'.format(quality),
            '-preset:v', 'slower',
            '-x264-params', 'opencl=true',
            # '-x264-params', 'keyint=240:min-keyint=20',
        ]

    ffmpeg_cmd[-1] += [
        '-pix_fmt', 'yuv420p',
        '-movflags', '+faststart',
        # '-profile:v', 'baseline',
        # '-level', '3.0',
    ]

    if audio_map:
        for i, (channel, lang) in enumerate(audio_map):
            if channel < 0x80:
                map_target = '0:a:{}'.format(channel)
            else:
                map_target = 'i:0x{:x}'.format(channel)
            ffmpeg_cmd[-1].extend([
                '-map', map_target,
                '-metadata:s:a:{}'.format(i), 'language={}'.format(lang)
            ])
    else:
        ffmpeg_cmd[-1].extend(['-map', '0:a:0', '-metadata:s:a:0', 'language=de'])

    if subtitle_map:
        for i, (channel, lang) in enumerate(subtitle_map):
            if channel < 0x20:
                map_target = '0:s:{}'.format(channel)
            else:
                map_target = 'i:0x{:x}'.format(channel)
            ffmpeg_cmd[-1].extend([
                '-map', map_target,
                '-metadata:s:s:{}'.format(i), 'language={}'.format(lang)
            ])

    # TODO we are probably able to do forced subtitles. we probably want that

    # we can set a default stream. make this available somehow
    #  -disposition:a:1 default

    if media_type and not use_gpu:
        ffmpeg_cmd[-1].extend(['-tune:v', media_type])

    def parameterized(output_file, input_file):
        return ffmpeg_cmd[0] + [input_file] + ffmpeg_cmd[1] + [output_file]

    return parameterized


def _get_ffmpeg_cmd(output_file, input_path, media_type, quality, extra_opts,
                    use_gpu, audio_map, subtitle_map):
    cmd = _get_parameterized_ffmpeg_cmd(media_type, quality, extra_opts,
                                        use_gpu, audio_map, subtitle_map)
    cmd = cmd(output_file=output_file, input_file=input_path)
    print(cmd)
    return cmd


def _get_mpv_dump_cmd(title, output_path, device=None):
    cmd = ['mpv', '--quiet', '--stream-dump={}'.format(output_path),
           'dvd://{}'.format(title)]
    if device:
        cmd.append('--dvd-device={}'.format(device))

    return cmd


@with_fifo
def _rip_title(title, output_dir, ffmpeg_cmd, fifo_path, device=None,
               output_file_suffix='.mkv'):
    filename = '{}{}'.format(title, output_file_suffix)
    out_file = os.path.join(output_dir, filename)

    mpv_cmd = _get_mpv_dump_cmd(title, fifo_path, device)
    mpv_proc = subprocess.Popen(mpv_cmd, stdout=subprocess.PIPE,
                                stderr=subprocess.STDOUT)

    ffmpeg_cmd = ffmpeg_cmd(output_file=out_file, input_file=fifo_path)
    print(ffmpeg_cmd)
    subprocess.check_call(ffmpeg_cmd)

    mpv_output = mpv_proc.stdout.read().decode('utf-8')

    return out_file, mpv_output


def _get_title_chapters(title=None, mpv_output=None, device=None):
    if HAS_DVDREAD:
        return _get_title_chapters_dvdread(title=title, device=device)
    else:
        return _get_title_chapters_mpv(title=title, mpv_output=mpv_output,
                                       device=device)


def _get_title_chapters_dvdread(title, device='/dev/dvd'):
    # we usually start at 0, but dvdread starts at 1
    title += 1
    with dvdread.DVD(device) as d:
        d.Open()

        if title > d.NumberOfTitles:
            msg = 'Given title {} doesn\'t exist on DVD (has {} titles).'
            raise RuntimeError(msg.format(title, d.NumberOfTitles))

        t = d.GetTitle(title)

        # we need to put in at least a microsecond to get the full
        # 0:00:00.000001 format
        td = timedelta(microseconds=1)
        chapters = [str(td)]

        for i in range(1, t.NumberOfChapters + 1):
            td += timedelta(milliseconds=t.GetChapter(i).Length)
            chapters.append(str(td))

        return chapters


def _get_title_chapters_mpv(title=None, mpv_output=None, device=None):
    if (None, None) == (title, mpv_output):
        raise RuntimeError('Either `title` or `mpv_output` is required.')

    print('Getting chapters from mpv might miss some at the end. '
          'Please install the dvdread python packages.', file=sys.stderr)

    if mpv_output is None:
        mpv_cmd = ['mpv', '--quiet', '--frames=0',
                   'dvd://{}'.format(title)]
        if device:
            mpv_cmd.append('--dvd-device={}'.format(device))
        mpv_output = subprocess.check_output(mpv_cmd,
                                             stderr=subprocess.DEVNULL)
        mpv_output = mpv_output.decode('utf-8')

    for line in mpv_output.splitlines():
        m = re.match(r'\[dvd\] CHAPTERS: (\S*)', line)
        if m:
            chapters = m.group(1)
            break
    else:
        raise RuntimeError('Could not find CHAPTERS in mpv output.')

    chapters = chapters.split(',')
    chapters = [c for c in chapters if c]   # filter empty/last

    return chapters


def _convert_chapters_to_mkvmerge_format(chapters):
    lines = []
    number_of_zeros = 0
    if len(chapters) > 1:
        number_of_zeros = int(math.log10(len(chapters) - 1))
    chapter_template = 'CHAPTER{{:0{}d}}'.format(number_of_zeros)
    for i, timestamp in enumerate(chapters):
        chapter_str = chapter_template.format(i)
        # if we start with e.g. 0:21, we need another 0 to be compatible
        if len(timestamp.split(':')[0]) == 1:
            timestamp = '0' + timestamp
        # if we have a higher resolution than 1 millisecond, we need to cut
        # some chars
        if len(timestamp.split('.')[-1]) > 3:
            strip_length = len(timestamp.split('.')[-1]) - 3
            timestamp = timestamp[:-strip_length]
        lines.append('{}={}'.format(chapter_str, timestamp))
        lines.append('{}NAME='.format(chapter_str))
    return os.linesep.join(lines)


def _set_chapters(mkv_file, chapters):
    if not os.path.exists(mkv_file):
        raise RuntimeError('MKV file does not exist.')

    with tempfile.NamedTemporaryFile() as f:
        mkvmerge_chapters = _convert_chapters_to_mkvmerge_format(chapters)
        f.write(mkvmerge_chapters.encode('utf-8'))
        f.flush()

        mkvpropedit_cmd = ['mkvpropedit', mkv_file, '--chapters', f.name]
        subprocess.check_call(mkvpropedit_cmd)


def _get_dvd_titles(device=None):
    if HAS_DVDREAD:
        return _get_dvd_titles_dvdread(device=device)
    else:
        return _get_dvd_titles_mpv(device=device)


def _get_dvd_titles_dvdread(device='/dev/dvd'):
    with dvdread.DVD(device) as d:
        d.Open()

        return d.NumberOfTitles


def _get_dvd_titles_mpv(device=None):
    mpv_cmd = ['mpv', '--vo', 'null', '--quiet', '--frames=0', 'dvd://']
    if device:
        mpv_cmd.append('--dvd-device={}'.format(device))
    out = subprocess.check_output(mpv_cmd, stderr=subprocess.STDOUT)
    out = out.decode('utf-8')

    for line in out.splitlines():
        m = re.match(r'^\[dvd\] There are (\d+) titles on this DVD.', line)
        # next line doesn't work on DVDs with one titleset having multiple
        # titles
        # m = re.match(r'^libdvdread: Found (\d+) VTS', line)
        if m:
            titles = int(m.group(1))
            break
    else:
        raise RuntimeError('Could not find the number of VTS in mpv output.')

    return titles


@cli.command()
@click.option('-o', '--output-dir', type=DIRECTORY_TYPE, required=True)
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
@click.option('--media-type', type=click.Choice(['film', 'animation']))
@click.option('--keep-audio', is_flag=True)
@click.option('--audio-map', multiple=True, type=(int, str),
              help="Keep specific audio. Order is important. Takes first "
                   "audio stream and puts it at stream INT in the new file "
                   "with language STR.")
@click.option('--subtitle-map', multiple=True, type=(int, str),
              help="Keep the specific subtitles. Order is important. Takes "
                   "stream defined as INT into place according to order with "
                   "language STR.")
@click.option('--quality', type=click.INT, default=22, show_default=True)
@click.option('--start-at-title', type=click.INT, default=0, show_default=True)
@click.option('--end-at-title', type=click.INT, default=-1)
@click.option('-t', '--title', 'titles', multiple=True, type=click.INT)
@click.option('--deinterlace', is_flag=True)
@click.option('--pre-read-size', type=click.INT, default=1024, show_default=True)
@click.option('--ffmpeg-opts')
def rip(output_dir, titles, device=None, media_type=None, keep_audio=False,
        quality=18, start_at_title=0, end_at_title=-1, ffmpeg_opts=None,
        deinterlace=False, audio_map=None, subtitle_map=None, pre_read_size=1024):
    if end_at_title >= 0 and start_at_title > end_at_title:
        raise click.ClickException('--start-at-title cannot be larger than --end-at-title.')

    if ffmpeg_opts is None:
        ffmpeg_opts = []
    else:
        ffmpeg_opts = shlex.split(ffmpeg_opts)

    if deinterlace:
        ffmpeg_opts.extend(['-vf', 'yadif'])

    if titles:
        titles = sorted(t for t in titles if t >= start_at_title)
    else:
        titles = _get_dvd_titles(device=device)
        if end_at_title >= 0:
            if end_at_title > titles:
                raise click.ClickException('--end-at-title {} larger than number of titles {}'
                                           .format(end_at_title, titles))
            # we'll put it into a Python range(), so we need to add 1 to make
            # it include that title
            end_at_title += 1
        else:
            end_at_title = titles
        titles = range(start_at_title, end_at_title)

    for title in titles:
        if keep_audio:
            audio_map = _get_audio_map(title, device=device)

        use_gpu = False
        ffmpeg_cmd = _get_parameterized_ffmpeg_cmd(media_type, quality,
                                                   ffmpeg_opts, use_gpu,
                                                   audio_map, subtitle_map,
                                                   pre_read=pre_read_size)

        out_file, mpv_output = _rip_title(title, output_dir, ffmpeg_cmd, device=device)

        chapters = _get_title_chapters(title=title, mpv_output=mpv_output,
                                       device=device)
        if chapters:
            _set_chapters(out_file, chapters)


@cli.command('convert')
@click.option('-i', '--input-file', type=FILE_TYPE, required=True)
@click.option('-o', '--output-file', type=NEW_FILE_TYPE, required=True)
@click.option('--media-type', type=click.Choice(['film', 'animation']))
@click.option('--quality', type=click.INT, default=18, show_default=True)
@click.option('--deinterlace', is_flag=True)
@click.option('--ffmpeg-opts')
@click.option('--audio-map', multiple=True, type=(int, str),
              help="Keep specific audio. Order is important. Takes first "
                   "audio stream and puts it at stream INT in the new file "
                   "with language STR.")
@click.option('--subtitle-map', multiple=True, type=(int, str),
              help="Keep the specific subtitles. Order is important. Takes "
                   "stream defined as INT into place according to order with "
                   "language STR.")
@click.option('-c', '--chapters')
def convert(input_file, output_file, media_type, quality, deinterlace,
            ffmpeg_opts, audio_map, subtitle_map, chapters):
    if ffmpeg_opts is None:
        ffmpeg_opts = []
    else:
        ffmpeg_opts = shlex.split(ffmpeg_opts)

    if deinterlace:
        ffmpeg_opts.extend(['-vf', 'yadif'])

    if chapters:
        chapters = chapters.split(',')

    ffmpeg_cmd = _get_ffmpeg_cmd(output_file, input_file, media_type,
                                 quality, ffmpeg_opts, False, audio_map,
                                 subtitle_map)

    subprocess.check_call(ffmpeg_cmd)

    if chapters:
        _set_chapters(output_file, chapters)


@cli.command('get-chapters')
@click.option('-t', '--title', type=int, required=True)
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
def get_chapters(title, device=None):
    print(','.join(_get_title_chapters(title=title, device=device)))


@cli.command()
@click.option('-o', '--output-dir', type=DIRECTORY_TYPE, required=True)
@click.option('-t', '--title', type=int, required=True)
@click.option('--pre-read-size', type=click.INT, default=1024, show_default=True)
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
def get_subtitles_file(output_dir, title, device=None, pre_read_size=1024):
    # ffmpeg_cmd = ffmpeg_cmd(output_file=out_file, input_file=fifo_path)
    ffmpeg_cmd = []
    ffmpeg_cmd.append(['ffmpeg',
                       '-probesize', '{}M'.format(pre_read_size),
                       '-analyzeduration', '{}M'.format(pre_read_size),
                       '-hwaccel', 'auto',
                       '-i'])
    ffmpeg_cmd.append([
        '-map', '0:v:0',
        '-c:v', 'h264',
        '-crf', '75',
        '-preset:v', 'veryfast',
        '-x264-params', 'opencl=true',
        # '-x264-params', 'keyint=240:min-keyint=20',
        '-c:s', 'copy',
    ])
    for i, (channel, lang) in enumerate(_get_subtitles(title, device)):
        lang = '{} - 0x{:x}'.format(lang, channel)
        ffmpeg_cmd[-1] += [
            '-map', 'i:0x{:x}'.format(channel),
            '-metadata:s:s:{}'.format(i), 'language={}'.format(lang)
        ]

    def parameterized(output_file, input_file):
        return ffmpeg_cmd[0] + [input_file] + ffmpeg_cmd[1] + [output_file]

    out_file, mpv_output = _rip_title(title, output_dir, parameterized, device=device)


@cli.command()
@click.option('-o', '--output-dir', type=DIRECTORY_TYPE, required=True)
@click.option('-t', '--title', type=int, required=True)
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
def ffprobe(output_dir, title, device):
    ffmpeg_cmd = [['ffprobe', '-i']]

    def parameterized(output_file, input_file):
        return ffmpeg_cmd[0] + [input_file]

    out_file, mpv_output = _rip_title(title, output_dir, parameterized, device=device)


@cli.command('set-chapters')
@click.option('-o', '--output-file', type=FILE_TYPE, required=True)
@click.option('-t', '--title', type=int)
@click.option('-c', '--chapters')
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
def set_chapters(output_file, title=None, chapters=None, device=None):
    if (None, None) == (title, chapters):
        raise RuntimeError('One of `title` and `chapters` is required.')

    if chapters is None:
        chapters = _get_title_chapters(title=title, device=device)
    else:
        chapters = chapters.split(',')

    _set_chapters(output_file, chapters)


@cli.command('find-right-title')
@click.option('--start-title', type=int, default=0, show_default=True)
@click.option('--end-title', type=int)
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
def find_right_title(start_title, end_title, device):
    if end_title and start_title > end_title:
        msg = '--start-title must not be bigger than --end-title'
        raise click.ClickException(msg)

    titles = _get_dvd_titles(device=device)
    if start_title > titles:
        raise RuntimeError('DVD has less titles than start title.')

    if end_title:
        end_title = min(titles - 1, end_title)
    else:
        end_title = titles - 1

    title_chapter_lengths = {}
    for title in range(start_title, end_title + 1):
        chapters = _get_title_chapters(title, device=device)

        timestamps = []
        for timestamp in chapters:
            timestamp, microseconds = timestamp.split('.')
            dt = datetime.strptime(timestamp, '%H:%M:%S')
            dt = dt.replace(microsecond=int(microseconds) * 1000)
            timestamps.append(dt)

        lengths = []
        if len(timestamps) > 1:
            for i, timestamp in enumerate(timestamps[1:]):
                lengths.append(timestamp - timestamps[i])

        if not lengths:
            continue

        title_chapter_lengths[title] = lengths

    # remove titles with duplicate chapters by looking at the length
    title_chapter_lengths = {
        title: lengths for title, lengths in title_chapter_lengths.items()
        if len(lengths) == len(set(lengths))}

    if title_chapter_lengths:
        print('The titles {} contain no duplicate chapter lengths.'.format(
              ', '.join(str(i) for i in title_chapter_lengths.keys())))
    else:
        print('No title without duplicates found.')


@cli.command('split-file')
@click.option('-c', '--chapters-file', type=FILE_TYPE, required=True,
              help='File with timestamps separated by comma')
@click.option('-i', '--input-file', type=FILE_TYPE, required=True)
@click.option('-o', '--output-dir', type=DIRECTORY_TYPE, required=True)
@click.option('-n', '--number', type=click.INT,
              help='Split out only one chapter given by this number.')
@click.option('--reencode', is_flag=True,
              help='Don\'t use -c:v copy and -c:a copy')
@click.option('--media-type', type=click.Choice(['film', 'animation']),
              help='Only relevant with --reencode')
@click.option('--quality', type=click.INT, default=18, show_default=True,
              help='Only relevant with --reencode')
@click.option('--ffmpeg-opts',
              help='Only relevant with --reencode')
@click.option('--audio-map', multiple=True, type=(int, str),
              help="Keep specific audio. Only relevant with --reencode."
                   "Order is important. Takes first "
                   "audio stream and puts it at stream INT in the new file "
                   "with language STR.")
@click.option('--subtitle-map', multiple=True, type=(int, str),
              help="Keep the specific subtitles. Order is important. Takes "
                   "stream defined as INT into place according to order with "
                   "language STR.")
def split_file(output_dir, input_file, chapters_file, number, reencode,
               media_type, quality, ffmpeg_opts, audio_map, subtitle_map):
    if ffmpeg_opts is None:
        ffmpeg_opts = []
    else:
        ffmpeg_opts = shlex.split(ffmpeg_opts)

    extension = input_file.split('.')[-1]

    with open(chapters_file) as f:
        chapters = f.read().strip().split(',')

    for i, (start, end) in enumerate(itertools.zip_longest(chapters, chapters[1:]), start=1):
        if number is not None and i != number:
            continue

        extra_opts = ffmpeg_opts + ['-ss', start]
        if end is not None:
            extra_opts.extend(['-to', end])

        out_path = os.path.join(output_dir, '{}.{}'.format(i, extension))

        if not reencode:
            ffmpeg_cmd = ['ffmpeg'] + extra_opts + [
                '-i', input_file,
                '-c:a', 'copy',
                '-c:v', 'copy',
                '-movflags', '+faststart',
                out_path
            ]
        else:
            use_gpu = False
            ffmpeg_cmd = _get_ffmpeg_cmd(out_path, input_file, media_type,
                                         quality, extra_opts, use_gpu,
                                         audio_map, subtitle_map)
        subprocess.check_call(ffmpeg_cmd)


@cli.command('titles')
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
def titles(device):
    if HAS_DVDREAD:
        with dvdread.DVD(device) as d:
            d.Open()

            for i in range(1, d.NumberOfTitles + 1):
                t = d.GetTitle(i)
                click.echo('{}: {}'.format(i - 1, t.PlaybackTimeFancy))
    else:
        click.echo(_get_dvd_titles(device=device))


@cli.command()
@click.option('-t', '--title', type=int, required=True)
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
def audios(device, title):
    """Retrieve the audio streams and their languages for a title"""
    for i, (channel, lang) in enumerate(_get_audios(title, device)):
        click.echo('{}: {} aid probably {} (0x{:x})'
                   .format(i, lang, channel, channel))


@cli.command()
@click.option('-t', '--title', type=int, required=True)
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
def subtitles(device, title):
    """Retrieve the subtitles streams and their languages for a title"""
    for i, (channel, lang) in enumerate(_get_subtitles(title, device)):
        print('{}: {} with id {} (0x{:x})'
              .format(i, lang, channel, channel))


@cli.command()
@click.option('-t', '--title', type=int)
@click.option('-o', '--output-dir', type=DIRECTORY_TYPE, required=True)
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
@click.option('--no-dump', is_flag=True)
@click.option('--no-audios', is_flag=True)
@click.option('--no-subtitles', is_flag=True)
@click.option('--no-chapters', is_flag=True)
def dump(title, output_dir, device, no_dump, no_audios, no_subtitles,
         no_chapters):
    """Just dump the stream and additional infos"""
    if title is None:
        titles = range(0, _get_dvd_titles(device))
    else:
        titles = [title]

    for title in titles:
        if not no_dump:
            dump_file = os.path.join(output_dir, '{}.dump'.format(title))
            mpv_cmd = _get_mpv_dump_cmd(title, dump_file, device)

            subprocess.check_call(mpv_cmd)

        if not no_audios:
            audios_file = os.path.join(output_dir, '{}.audios'.format(title))
            with open(audios_file, 'w') as f:
                audios = ['{}: {}'.format(c, l)
                          for c, l in _get_audios(title, device)]
                f.write('\n'.join(audios))

        if not no_subtitles:
            subtitles_file = os.path.join(output_dir, '{}.subs'.format(title))
            with open(subtitles_file, 'w') as f:
                subtitles = ['{}: {}'.format(c, l)
                             for c, l in _get_subtitles(title, device)]
                f.write('\n'.join(subtitles))

        if not no_chapters:
            chapters_file = os.path.join(output_dir, '{}.chapters'.format(title))
            with open(chapters_file, 'w') as f:
                chapters = _get_title_chapters(title, device=device)
                f.write(','.join(chapters))


@cli.command()
def has_dvdread():
    print(f"dvdread support: {'available' if HAS_DVDREAD else 'missing'}")


@cli.group()
def audio():
    ...


@audio.command()
@click.option('-o', '--output-dir', type=DIRECTORY_TYPE, required=True)
@click.option('-d', '--device', type=DEVICE_OR_DIRECTORY_TYPE,
              default='/dev/dvd', show_default=True)
@click.option('-t', '--title', type=int, required=True)
def rip_dvd_title(device, output_dir, title):
    """Rip the given title's audio from DVD"""
    def partial(output_file, input_file):
        return ['ffmpeg',
                '-i', input_file,
                '-map', '0:a:0',
                '-c:a', 'flac',
                output_file]

    _rip_title(title, output_dir, partial, device=device,
               output_file_suffix='.flac')


@audio.command('split-file')
@click.option('-o', '--output-dir', type=DIRECTORY_TYPE, required=True)
@click.option('-c', '--chapters-file', type=FILE_TYPE, required=True,
              help='File with timestamps separated by comma')
@click.option('-i', '--input-file', type=FILE_TYPE, required=True)
def audio_split_file(output_dir, chapters_file, input_file):
    """Split an audio file into different flac files based on timestamps in the chapters file"""
    with open(chapters_file) as f:
        chapters = f.read().strip().split(',')

    times_ten = 0
    while len(chapters) // (10 ** times_ten) > 9:
        times_ten += 1

    name_template = '{:0' + str(times_ten + 1) + 'd}.flac'
    for i, (start, end) in enumerate(itertools.zip_longest(chapters, chapters[1:]), start=1):
        ffmpeg_cmd = [
            'ffmpeg',
            '-ss', start]
        if end is not None:
            ffmpeg_cmd.extend(['-to', end])

        out_path = os.path.join(output_dir, name_template.format(i))

        ffmpeg_cmd.extend([
            '-i', input_file,
            '-c:a', 'flac',
            '-movflags', '+faststart',
            out_path])

        subprocess.check_call(ffmpeg_cmd)


if __name__ == '__main__':
    cli(complete_var='_RIP_PY_COMPLETE')