from datetime import datetime
import json
from django.db import transaction
from django.http import HttpResponse
from django.shortcuts import get_object_or_404
from django.utils import timezone
from boards.forms import ThreadForm, PlainErrorList
from boards.models import Post
from boards.views import get_post, _datetime_to_epoch, _new_post, \
    _ban_current_user

__author__ = 'neko259'


@transaction.atomic
def api_get_threaddiff(request, thread_id, last_update_time):
    """Get posts that were changed or added since time"""

    thread = get_object_or_404(Post, id=thread_id).thread_new

    filter_time = datetime.fromtimestamp(float(last_update_time) / 1000000,
                                         timezone.get_current_timezone())

    json_data = {
        'added': [],
        'updated': [],
        'last_update': None,
        }
    added_posts = Post.objects.filter(thread_new=thread,
                                      pub_time__gt=filter_time) \
        .order_by('pub_time')
    updated_posts = Post.objects.filter(thread_new=thread,
                                        pub_time__lte=filter_time,
                                        last_edit_time__gt=filter_time)
    for post in added_posts:
        json_data['added'].append(get_post(request, post.id).content.strip())
    for post in updated_posts:
        json_data['updated'].append(get_post(request, post.id).content.strip())
    json_data['last_update'] = _datetime_to_epoch(thread.last_edit_time)

    return HttpResponse(content=json.dumps(json_data))


# TODO This method needs to be implemented properly
# def api_add_post(request, form):
#     """
#     Add a post and return the JSON response for it
#     """
#
#     status = 'ok'
#     errors = []
#
#     if request.method == 'POST':
#         form = ThreadForm(request.POST, request.FILES,
#                           error_class=PlainErrorList)
#         form.session = request.session
#
#         if form.is_valid():
#             # TODO Don't form a response here cause we'll not need it
#             _new_post(request, form)
#         if form.need_to_ban:
#             # Ban user because he is suspected to be a bot
#             _ban_current_user(request)
#     else:
#         status = 'error'
#         for field in form.fields:
#             if field.errors:
#                 errors.append(field.errors)
#
#     response = {
#         'status': status,
#         'errors': errors,
#     }
#
#     return HttpResponse(content=json.dumps(response))