# coding: utf-8
from __future__ import unicode_literals

from .common import InfoExtractor

from ..utils import (
    ExtractorError,
    merge_dicts,
    T,
    traverse_obj,
    txt_or_none,
    url_or_none,
)


class BandlabIE(InfoExtractor):
    _VALID_URL = r'https?://(?:www\.)?bandlab\.com/post/(?P<id>[^/]+)'

    _TESTS = [{
        'url': 'https://www.bandlab.com/post/f5f04998635a44ea819cacdba7ae2076_f8d8574c3bdaec11b6562818783151a1',
        'info_dict': {
            'id': 'f5f04998635a44ea819cacdba7ae2076_f8d8574c3bdaec11b6562818783151a1',
            'ext': 'm4a',
            'title': 'ON MY OWN (unreleased)',
            'artist': 'Michael MacDonald',
        },
    }]

    def _real_extract(self, url):
        track_id = self._match_id(url)
        config = self._download_json(
            'http://www.bandlab.com/api/v1.3/posts/%s' % track_id, track_id)
        track_url = traverse_obj(config, ('track', 'sample', 'audioUrl', T(url_or_none)))
        if not track_url:
            raise ExtractorError(
                '[%s] No video formats found!' % (self.ie_key(), ),
                video_id=track_id, expected=True)
        title = config['track']['name']

        return {
            'id': track_id,
            'title': title,
            'url': track_url,
            'artist': traverse_obj(config, ('creator', 'name', T(txt_or_none))),
        }


class BandlabAlbumOrPlaylistIE(InfoExtractor):
    _VALID_URL = r'https?://(?:www\.)?bandlab\.com/[^/]+/(?P<kind>albums|collections)/(?P<id>[^/]+)'
    _TESTS = [{
        'url': 'https://www.bandlab.com/sbsdasani/albums/dc26e307-e51f-ed11-95d7-002248452390',
        'playlist': [
            {
                'info_dict': {
                    'id': '91feeb36-8e10-4c91-ae57-ffac0a98c6b4',
                    'title': 'How\'d I Lose You? (Intro)',
                    'ext': 'm4a',
                },
            },
            {
                'info_dict': {
                    'id': 'd87c50a2-70cb-4937-9b97-3ae8646ca3aa',
                    'title': 'Money $$$',
                    'ext': 'm4a',
                },
            },
            {
                'info_dict': {
                    'id': 'ff2909ff-348f-448d-9d2c-7edbf2f0ec5e',
                    'title': 'You\'ll Be Mine',
                    'ext': 'm4a',
                },
            },
            {
                'info_dict': {
                    'id': '53786c38-1f3c-4921-9271-793a64af7186',
                    'title': 'Who You Are',
                    'ext': 'm4a',
                },
            },
            {
                'info_dict': {
                    'id': '0394bb27-113f-4d19-b902-f9c1fe6ba8a8',
                    'title': 'In Your Eyes',
                    'ext': 'm4a',
                },
            },
            {
                'info_dict': {
                    'id': '2aa44689-c7fa-4d0e-b28a-e0d1dd570372',
                    'title': 'The Same',
                    'ext': 'm4a',
                },
            },
            {
                'info_dict': {
                    'id': '281fe589-a559-4260-802d-78a6c7a973d8',
                    'title': 'Fall In Love',
                    'ext': 'm4a',
                },
            },
            {
                'info_dict': {
                    'id': '83a9dc0a-702f-40fd-82f6-ab847f6a7b46',
                    'title': 'Tried So Hard',
                    'ext': 'm4a',
                },
            },
            {
                'info_dict': {
                    'id': '3f6a4a1c-eb73-449f-bd45-f7958d6f2de1',
                    'title': 'The End Of Everything',
                    'ext': 'm4a',
                },
            }
        ],
        'info_dict': {
            'id': 'dc26e307-e51f-ed11-95d7-002248452390',
            'album': 'ENDLESS SUMMER',
            'artist': 'Michael MacDonald'
        },
    }, {
        'url': 'https://www.bandlab.com/hexatetrahedronx/collections/8fb1041c-e865-eb11-9889-0050f28a2802',
        'playlist': [
            {
                'info_dict': {
                    'id': '8f37e4aa-92c4-eb11-a7ad-0050f280467f',
                    'title': 'psych ward',
                    'ext': 'm4a'
                }
            }
        ],
        'info_dict': {
            'id': '8fb1041c-e865-eb11-9889-0050f28a2802',
            'album': 'DOOMTAPE',
            'artist': '12days'
        }
    }]

    def _real_extract(self, url):
        resource_id, kind = self._match_valid_url(url).group('id', 'kind')
        config = self._download_json(
            'http://www.bandlab.com/api/v1.3/%s/%s' % (kind, resource_id), resource_id)
        entries = []
        for track in traverse_obj(config, ('posts', Ellipsis)):
            url, name = (traverse_obj(track, ('track', {
                'url': ('sample', 'audioUrl', T(url_or_none)),
                'name': ('name', T(txt_or_none)),
            }), ('revision', {
                'url': ('mixdown', 'file', T(url_or_none)),
                'name': ('song', 'name', T(txt_or_none)),
            })).get(x) for x in ('url', 'name'))
            if not (url and name):
                continue
            track_id = self._search_regex(
                r'/([^/]+)\.m4a$', url, 'track id', default=None)
            if not track_id:
                continue
            entries.append({
                'url': url,
                'id': track_id,
                'title': name,
            })

        return merge_dicts(
            self.playlist_result(entries, playlist_id=resource_id),
            traverse_obj(config, {
                'album': ('name', T(txt_or_none)),
                'artist': ('creator', 'name', T(txt_or_none)),
            }))