from django.utils.translation import gettext as _
from django.views.generic import ListView
from django.http import HttpResponse
from django.core.paginator import Paginator

from judge.jinja2.gravatar import gravatar
from .models import Message
import json


def format_time(time):
    return time.strftime('%H:%M %p  %d-%m-%Y')


def format_messages(messages):
    msg_list = [{
        'time': format_time(msg.time),
        'author': str(msg.author),
        'body': msg.body,
        'image': gravatar(msg.author, 32),
    } for msg in messages]
    return json.dumps(msg_list)


class ChatView(ListView):
    model = Message
    context_object_name = 'message'
    template_name = 'chat/chat.html'
    title = _('Chat Box')
    paginate_by = 50
    paginator = Paginator(Message.objects.all(), paginate_by)

    def get(self, request, *args, **kwargs):
        page = request.GET.get('page')
        if (page == None):
            return super().get(request, *args, **kwargs)

        cur_page = self.paginator.get_page(page)
        return HttpResponse(format_messages(cur_page.object_list))

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['title'] = self.title

        for msg in context['message']:
            msg.time = format_time(msg.time)

        return context