import re

from .common import InfoExtractor
from ..utils import (
    determine_ext,
    float_or_none,
    traverse_obj,
    variadic,
)


class Echo360IE(InfoExtractor):
    _INSTANCES_RE = r'''(?:
                            echo360\.ca|
                            echo360\.net\.au|
                            echo360\.org\.au|
                            echo360\.org\.uk|
                            echo360\.org|
                        )'''
    _UUID_RE = r'[\da-fA-F]{8}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{12}'
    _VALID_URL = rf'''(?x)
        https?://(?P<host>{_INSTANCES_RE})
        /media/(?P<id>{_UUID_RE})/public'''

    _API_BASE = 'https://%s/api/ui/echoplayer/public-links/%s/media/%s/player-properties'

    _TESTS = [
        {
            'url': 'https://echo360.org.uk/media/1d8392aa-a3e7-4e78-94cf-b6532c27208c/public',
            'info_dict': {
                'id': '3c7ae6e0-fa19-432d-aa21-c283b4276f2a',
                'ext': 'mp4',
                'title': '3-4 Force + moment + mechanics.mp4',
                'duration': 4731.888,
            },
            'params': {'skip_download': 'm3u8'}
        },
        {
            'url': 'https://echo360.net.au/media/f04960a9-2efc-4b63-87b5-72e629081d15/public',
            'info_dict': {
                'id': '6098a147-2d65-40f3-b9e9-a0204afe450c',
                'ext': 'mp4',
                'title': 'EXSC634_Online_Workshop_Week_4.mp4',
                'duration': 6659.72,
            },
            'params': {'skip_download': 'm3u8'}
        },
    ]

    def _call_api(self, host, video_id, media_id, session_token, **kwargs):
        return self._download_json(
            self._API_BASE % (host, video_id, media_id), video_id,
            headers={'Authorization': f'Bearer {session_token}'}, **kwargs)

    @staticmethod
    def _update_url_query(uri, query_string):
        if query_string is not None:
            return f'{uri.split("?", 1)[0]}?{query_string}'
        return uri

    @staticmethod
    def _get_query_string(uri, query_strings):
        uri_base = uri.split("?", 1)[0]
        for query_string in query_strings:
            if re.match(query_string['uriPattern'], uri_base):
                return query_string['queryString']
        return None

    def _parse_mediapackage(self, video):
        video_id = video['playableAudioVideo']['mediaId']
        query_strings = traverse_obj(video, ('sourceQueryStrings', 'queryStrings')) or []

        formats = []
        for track in variadic(traverse_obj(video, ('playableAudioVideo', 'playableMedias')) or []):
            href = track.get('uri')
            if href is None:
                continue
            href = self._update_url_query(href, self._get_query_string(href, query_strings))
            if track.get('isHls') or determine_ext(href, None) == 'm3u8':
                hls_formats = self._extract_m3u8_formats(
                    href, video_id, live=track.get('isLive'), m3u8_id='hls', entry_protocol='m3u8_native', fatal=False
                )

                for hls_format in hls_formats:
                    query_string = self._get_query_string(hls_format['url'], query_strings)
                    hls_format['extra_param_to_segment_url'] = query_string
                    hls_format['url'] = self._update_url_query(hls_format['url'], query_string)

                formats.extend(hls_formats)

        return {
            'id': video_id,
            'formats': formats,
            'title': video.get('mediaName'),
            'duration': float_or_none(self._search_regex(
                r'PT(\d+\.?\d+)S', traverse_obj(video, ('playableAudioVideo', 'duration')),
                'video duration', default=None, fatal=False)),
        }

    def _real_extract(self, url):
        host, video_id = self._match_valid_url(url).group('host', 'id')
        webpage = self._download_webpage(url, video_id)

        player_config = self._search_json(r'Echo\["mediaPlayerBootstrapApp"\]\("', webpage, 'player config', video_id,
                                          transform_source=lambda x: x.replace(R'\"', '"'))

        urlh = self._request_webpage(
            f'https://{host}/api/ui/sessions/{player_config["sessionId"]}',
            video_id,
            note='Open video session',
            errnote='Unable to open video session',
        )

        return self._parse_mediapackage(self._call_api(
            host, player_config.get('shareLinkId') or player_config['publicLinkId'], player_config['mediaId'],
            urlh.headers['Token'])['data'])