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from datetime import datetime, timedelta
import math, uuid

from django.views.generic.base import TemplateView
from django.views.generic.detail import DetailView
from django.views.decorators.csrf import csrf_exempt

from jsonresponse import to_json

from emissions.models import Emission, Episode, Diffusion, SoundFile, \
        Schedule, Nonstop, NewsItem, NewsCategory

from emissions.utils import whatsonair

class ProgramView(TemplateView):
    template_name = 'program.html'

    def get_context_data(self, **kwargs):
        context = super(ProgramView, self).get_context_data(**kwargs)
        schedules = Schedule.objects.all().order_by('datetime')
        days = []
        for day in range(7):
            days.append({'schedules': [x for x in schedules if x.is_on_weekday(day+1)],
                         'datetime': datetime(2007, 1, day+1)})
        context['days'] = days
        return context

program = ProgramView.as_view()

class TimeCell:
    emissions = None
    nonstop = None
    w = 1
    h = 1
    time_label = None

    def __init__(self, i, j):
        self.x = i
        self.y = j
        self.schedules = []

    def add_schedule(self, schedule):
        end_time = schedule.datetime + timedelta(
                minutes=schedule.get_duration())
        self.time_label = '%02d:%02d-%02d:%02d' % (
                schedule.datetime.hour,
                schedule.datetime.minute,
                end_time.hour,
                end_time.minute)
        self.schedules.append(schedule)

    def __unicode__(self):
        if self.schedules:
            return ', '.join([x.emission.title for x in self.schedules])
        else:
            return self.nonstop

    def __eq__(self, other):
        return (unicode(self) == unicode(other) and self.time_label == other.time_label)


class Grid(TemplateView):
    template_name = 'grid.html'

    def get_context_data(self, **kwargs):
        context = super(Grid, self).get_context_data(**kwargs)
        schedules = Schedule.objects.all().order_by('datetime')

        nb_lines = 2 * 24 # the cells are half hours
        grid = []

        times = ['%02d:%02d' % (x/2, x%2*30) for x in range(nb_lines)]
        # start grid after the night programs
        times = times[2*Schedule.DAY_HOUR_START:] + times[:2*Schedule.DAY_HOUR_START]

        nonstops = []
        for nonstop in Nonstop.objects.all():
            if nonstop.start < nonstop.end:
                nonstops.append([nonstop.start.hour + nonstop.start.minute/60.,
                                 nonstop.end.hour + nonstop.end.minute/60.,
                                 nonstop.title])
            else:
                # crossing midnight
                nonstops.append([nonstop.start.hour + nonstop.start.minute/60.,
                                 24,
                                 nonstop.title])
                nonstops.append([0,
                                 nonstop.end.hour + nonstop.end.minute/60.,
                                 nonstop.title])
        nonstops.sort()

        for i in range(nb_lines):
            grid.append([])
            for j in range(7):
                grid[-1].append(TimeCell(i, j))

            nonstop = [x for x in nonstops if i>=x[0]*2 and i<x[1]*2][0]
            for time_cell in grid[-1]:
                time_cell.nonstop = nonstop[2]
                if nonstop[1] == 5:
                    # the one ending at 5am will be cut down, so we inscribe
                    # its duration manually
                    time_cell.time_label = '%02d:00-%02d:00' % (
                            nonstop[0], nonstop[1])

        for schedule in Schedule.objects.all():
            row_start = schedule.datetime.hour * 2 + \
                    int(math.ceil(schedule.datetime.minute / 30))
            day_no = schedule.get_weekday()

            for step in range(int(math.ceil(schedule.get_duration() / 30.))):
                if grid[(row_start+step)%nb_lines][day_no] is None:
                    grid[(row_start+step)%nb_lines][day_no] = TimeCell()
                grid[(row_start+step)%nb_lines][day_no].add_schedule(schedule)

        # start grid after the night programs
        grid = grid[2*Schedule.DAY_HOUR_START:] + grid[:2*Schedule.DAY_HOUR_START]

        # merge adjacent cells
        for i in range(nb_lines):
            for j, cell in enumerate(grid[i]):
                if grid[i][j] is None:
                    continue
                t = 1
                try:
                    while grid[i][j+t] == cell:
                        cell.w += 1
                        grid[i][j+t] = None
                        t += 1
                except IndexError:
                    pass
            grid[i] = [x for x in grid[i] if x is not None]

        for i in range(nb_lines):
            grid[i] = [x for x in grid[i] if x is not None]
            for j, cell in enumerate(grid[i]):
                if grid[i][j] is None:
                    continue
                t = 1
                try:
                    while True:
                        same_cell_below = [(bj, x) for bj, x in enumerate(grid[i+cell.h])
                                           if x == cell and x.y == cell.y and x.w == cell.w]
                        if not same_cell_below:
                            break
                        bj, same_cell_below = same_cell_below[0]
                        del grid[i+cell.h][bj]
                        cell.h += 1
                except IndexError:
                    pass

        # cut night at 3am
        grid = grid[:42]
        times = times[:42]

        context['grid'] = grid
        context['times'] = times
        context['weekdays'] = ['Lundi', 'Mardi', 'Mercredi', 'Jeudi',
                'Vendredi', 'Samedi', 'Dimanche']

        return context

grid = Grid.as_view()


class Home(TemplateView):
    template_name = 'home.html'

    def get_context_data(self, **kwargs):
        context = super(Home, self).get_context_data(**kwargs)
        context['newsImaged'] = NewsItem.objects.all().exclude(image__isnull=True).exclude(image__exact='').order_by('-datetime')[:3]
        context['news'] = NewsItem.objects.all().order_by('-datetime')[:60]
        context['emissions'] = Emission.objects.filter(archived=False).order_by('title')
        context['player'] = audioPlayer()
        return context

home = Home.as_view()

class News(TemplateView):
    template_name = 'news.html'

    def get_context_data(self, **kwargs):
        context = super(News, self).get_context_data(**kwargs)
        context['newsImaged'] = NewsItem.objects.all().exclude(image__isnull=True).exclude(image__exact='').order_by('-datetime')[:3]
        context['news'] = NewsItem.objects.all().order_by('-datetime')[:60]
        context['categories'] = NewsCategory.objects.all()
        context['emissions'] = Emission.objects.filter(archived=False).order_by('?')
        context['player'] = audioPlayer()
        return context

news = News.as_view()

class Get(TemplateView):
    template_name = 'get.html'

    def get_context_data(self, **kwargs):
        context = super(Get, self).get_context_data(**kwargs)
        context['emissions'] = Emission.objects.all().order_by('title')
        return context

get = Get.as_view()

class Listen(TemplateView):
    template_name = 'listen.html'

    def get_context_data(self, **kwargs):
        context = super(Listen, self).get_context_data(**kwargs)
        context['player'] = audioPlayer()
        return context

listen = Listen.as_view()

class audioPlayer:
    def __init__(self):
        self.unique = uuid.uuid4()


@csrf_exempt
@to_json('api')
def onair(request):
    d = whatsonair()
    if d.get('episode'):
        d['episode'] = {
            'title': d['episode'].title,
            'url': d['episode'].get_absolute_url()
        }
    if d.get('emission'):
        d['emission'] = {
            'title': d['emission'].title,
            'url': d['emission'].get_absolute_url()
        }
    return d


class NewsItemDetailView(DetailView):
    model = NewsItem

newsitem = NewsItemDetailView.as_view()