from django.shortcuts import render
from django.views.generic import View
from django.db.models import Q
from django.core.urlresolvers import reverse

from boards.abstracts.paginator import get_paginator
from boards.forms import SearchForm, PlainErrorList
from boards.models import Post, Tag
from boards.views.mixins import PaginatedMixin


MIN_QUERY_LENGTH = 3
RESULTS_PER_PAGE = 10

FORM_QUERY = 'query'

CONTEXT_QUERY = 'query'
CONTEXT_FORM = 'form'
CONTEXT_PAGE = 'page'
CONTEXT_TAGS = 'tags'

REQUEST_PAGE = 'page'

__author__ = 'neko259'

TEMPLATE = 'search/search.html'


class BoardSearchView(View, PaginatedMixin):
    def get(self, request):
        params = dict()

        form = SearchForm(request.GET, error_class=PlainErrorList)
        params[CONTEXT_FORM] = form

        if form.is_valid():
            query = form.cleaned_data[FORM_QUERY]
            if len(query) >= MIN_QUERY_LENGTH:
                results = Post.objects.filter(Q(text__icontains=query)
                        | Q(title__icontains=query) | Q(opening=True,
                            thread__tags__aliases__name__icontains=query)).order_by('-id').distinct()
                paginator = get_paginator(results, RESULTS_PER_PAGE)
                paginator.set_url(reverse('search'), request.GET.dict())

                page = int(request.GET.get(REQUEST_PAGE, '1'))

                params[CONTEXT_QUERY] = query
                params.update(self.get_page_context(paginator, page))

                tags = Tag.objects.get_tag_url_list(Tag.objects.filter(aliases__name__icontains=query))
                params[CONTEXT_TAGS] = tags

        return render(request, TEMPLATE, params)