import time
from mutagen.mp3 import MP3

from django.contrib.auth.decorators import login_required
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from django.db.models import Q
from django.http import JsonResponse, HttpResponseForbidden
from django.shortcuts import get_object_or_404
from django.views.decorators.http import require_http_methods

from marietje.utils import song_to_dict, playlist_song_to_dict, send_to_bertha

from songs.models import Song
from queues.models import PlaylistSong
from .forms import UploadForm


@login_required
def songs(request):
    try:
        pagesize = int(request.POST.get('pagesize'))
    except:
        pagesize = 10

    if pagesize is None or pagesize < 10 or pagesize > 100:
        pagesize = 10

    try:
        page = int(request.POST.get('page'))
    except:
        page = 1

    queries = [Q(deleted=False)]
    queries.extend([Q(Q(artist__icontains=word) | Q(title__icontains=word)) for word in request.POST.get('all', '').split()])
    queries.extend([Q(user__name__icontains=word) for word in request.POST.get('uploader', '').split()])

    filter_query = queries.pop()
    for query in queries:
        filter_query &= query

    songs_query = Song.objects.filter(filter_query).order_by('artist', 'title').select_related('user')
    paginator = Paginator(songs_query, pagesize)

    try:
        songs = paginator.page(page)
    except PageNotAnInteger:
        songs = paginator.page(1)
    except EmptyPage:
        songs = paginator.page(paginator.num_pages)

    songs_dict = [song_to_dict(song, user=True) for song in songs.object_list]

    return JsonResponse({
        'per_page': pagesize,
        'current_page': page,
        'last_page': paginator.num_pages,
        'data': songs_dict
    })


@login_required
def managesongs(request):
    try:
        pagesize = int(request.POST.get('pagesize'))
    except:
        pagesize = 10

    if pagesize is None or pagesize < 10 or pagesize > 100:
        pagesize = 10

    try:
        page = int(request.POST.get('page'))
    except:
        page = 1

    songs_query = Song.objects.filter(
        user=request.user, deleted=False,
        artist__icontains=request.POST.get('artist', ''),
        title__icontains=request.POST.get('title', '')
    ).order_by('artist', 'title')

    total = songs_query.count()
    paginator = Paginator(songs_query, pagesize)

    try:
        songs = paginator.page(page)
    except PageNotAnInteger:
        songs = paginator.page(1)
    except EmptyPage:
        songs = paginator.page(paginator.num_pages)

    songs_dict = [song_to_dict(song) for song in songs.object_list]

    return JsonResponse({
        'total': total,
        'per_page': pagesize,
        'current_page': page,
        'last_page': paginator.num_pages,
        'data': songs_dict
    })


@login_required
def queue(request):
    queue = request.user.queue
    return JsonResponse({
        'current_song': playlist_song_to_dict(queue.current_song()),
        'queue': [playlist_song_to_dict(playlist_song, user=request.user) for playlist_song in queue.queue()],
        'started_at': 0 if queue.started_at is None else int(time.mktime(queue.started_at.timetuple())),
        'current_time': int(time.time())
    })


@login_required
def skip(request):
    playlist_song = request.user.queue.current_song()
    if playlist_song.user != request.user and not request.user.has_perm('queues.can_skip'):
        return HttpResponseForbidden()

    playlist_song.state = 2
    playlist_song.save()

    return JsonResponse({})


@require_http_methods(["POST"])
@login_required
def move_up(request):
    if not request.user.has_perm('queues.can_move'):
        return HttpResponseForbidden()
    playlist_song = get_object_or_404(PlaylistSong, id=request.POST.get('id'))
    playlist_song.move_up()
    return JsonResponse({})


@require_http_methods(["POST"])
@login_required
def move_down(request):
    playlist_song = get_object_or_404(PlaylistSong, id=request.POST.get('id'))
    if playlist_song.user != request.user and not request.user.has_perm('queues.can_move'):
        return HttpResponseForbidden()
    playlist_song.move_up()
    return JsonResponse({})


@require_http_methods(["POST"])
@login_required
def cancel(request):
    playlist_song = get_object_or_404(PlaylistSong, id=request.POST.get('id'))
    if playlist_song.user != request.user and not request.user.has_perm('queues.can_cancel'):
        return HttpResponseForbidden()
    playlist_song.state = 3
    playlist_song.save()
    return JsonResponse({})


@require_http_methods(["POST"])
@login_required
def request(request):
    queue = request.user.queue
    song = get_object_or_404(Song, id=request.POST.get('id'), deleted=False)
    queue.request(song, request.user)

    return JsonResponse({
        'success': True
    })


@require_http_methods(["POST"])
@login_required
def upload(request):
    form = UploadForm(request.POST, request.FILES)
    if not form.is_valid():
        return JsonResponse({
            'success': False, 'errorMessage': 'File not uploaded correctly.'
        })

    file = request.FILES['file']

    duration = MP3(file).info.length
    hash = send_to_bertha(file)
    song = Song(user=request.user, artist=request.POST.get('artist'), title=request.POST.get('title'), hash=hash, duration=duration)
    song.save()

    return JsonResponse({
        'success': True
    })