import logging

from django.views.generic import View
from django.http.response import HttpResponse, HttpResponseRedirect, Http404
from django.db.models import F

from aliyun_video.models import (
    AliyunVideo, AliyunVideoPlayDetail, AliyunVideoHistory
)
from aliyun_video.core.utils import get_valid_cdn_url


logger = logging.getLogger(__name__)


class Playm3u8View(View):

    def get(self, request, *args, **kwargs):
        lesson_id = kwargs['lesson_id']
        video_id = kwargs['video_id']
        play_id = kwargs['play_id']
        try:
            m3u8_index_content = AliyunVideoPlayDetail.objects.get(
                video__lesson_id=lesson_id,
                video_id=video_id,
                play_id=play_id
            ).m3u8_index_content
            if request.user.is_authenticated:
                logger.info({
                    'user_id': request.user.id,
                    'lesson_id': lesson_id,
                    'video_id': video_id,
                    'play_id': play_id,
                    'type': 'backend',
                    'body': {
                        'event': 'm3u8'
                    }
                })
        except AliyunVideoPlayDetail.DoesNotExist:
            raise Http404
        return HttpResponse(m3u8_index_content)


class PlayTsView(View):

    def get(self, request, *args, **kwargs):
        lesson_id = kwargs['lesson_id']
        video_id = kwargs['video_id']
        play_id = kwargs['play_id']
        seq_num = kwargs['seq_num']

        if not AliyunVideoPlayDetail.objects.filter(
                video__lesson_id=lesson_id,
                video_id=video_id,
                play_id=play_id).exists():
            raise Http404
        if request.user.is_authenticated:
            logger.info({
                'user_id': request.user.id,
                'lesson_id': lesson_id,
                'video_id': video_id,
                'play_id': play_id,
                'type': 'backend',
                'body': {
                    'event': 'ts',
                    'seq_num': seq_num
                }
            })
        return HttpResponseRedirect(
            get_valid_cdn_url('/{}/{}-{}.ts'.format(video_id, play_id, seq_num)))


class PlayLogView(View):

    def get(self, request, *args, **kwargs):
        lesson_id = kwargs['lesson_id']
        video_id = kwargs['video_id']

        try:
            aliyun_video = AliyunVideo.objects.get(
                lesson_id=lesson_id,
                video_id=video_id)
        except AliyunVideo.DoesNotExist:
            raise Http404

        data = request.GET
        event_type = data.get('event')
        play_at = data.get('play_at')
        definition = data.get('definition')

        if request.user.is_authenticated:
            logger.info({
                'user_id': request.user.id,
                'lesson_id': lesson_id,
                'video_id': video_id,
                'type': 'frontend',
                'body': dict(request.GET)
            })

        if event_type == 'end' and request.user.is_authenticated:
            history, _ = AliyunVideoHistory.objects.get_or_create(
                video=aliyun_video,
                user=request.user)
            AliyunVideoHistory.objects.filter(pk=history.id).update(
                played_at=play_at,
                last_definition=definition,
                total_visited_count=F('total_visited_count') + 1)

            from university.models import Lesson
            Lesson.update_lesson_progress(lesson_id, request.user.id)
        return HttpResponse()