# -*- coding: utf-8 -*-
#
# Copyright IRI (c) 2013
#
# contact@iri.centrepompidou.fr
#
# This software is governed by the CeCILL-B license under French law and
# abiding by the rules of distribution of free software.  You can  use, 
# modify and/ or redistribute the software under the terms of the CeCILL-B
# license as circulated by CEA, CNRS and INRIA at the following URL
# "http://www.cecill.info". 
#
# As a counterpart to the access to the source code and  rights to copy,
# modify and redistribute granted by the license, users are provided only
# with a limited warranty  and the software's author,  the holder of the
# economic rights,  and the successive licensors  have only  limited
# liability. 
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# with loading,  using,  modifying and/or developing or reproducing the
# software by the user in light of its specific status of free software,
# that may mean  that it is complicated to manipulate,  and  that  also
# therefore means  that it is reserved for developers  and  experienced
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#


from django.conf import settings
from django.core.paginator import InvalidPage
from django.http.response import Http404
from django.template.context import RequestContext
from haystack.query import SearchQuerySet
from haystack.views import SearchView, search_view_factory

from p4l.search.forms import RecordSearchForm
from p4l.utils import P4lPaginator


class RecordSearchView(SearchView):
    
    def __init__(self, template=None, load_all=True, form_class=None, searchqueryset=None, context_class=RequestContext, results_per_page=None):
        record_searchQuerySet = SearchQuerySet()
        template = "p4l/home.html"
        results_per_page= settings.NB_RECORDS_BY_PAGE
        form_class = RecordSearchForm
        SearchView.__init__(self, template=template, load_all=False, form_class=form_class, searchqueryset=record_searchQuerySet, context_class=context_class, results_per_page=results_per_page)

    @classmethod
    def as_view(cls):
        return search_view_factory(view_class=cls)
    
    def build_page(self):
        """
        Paginates the results appropriately.

        In case someone does not want to use Django's built-in pagination, it
        should be a simple matter to override this method to do what they would
        like.
        """
        try:
            page_no = int(self.request.GET.get('page', 1))
        except (TypeError, ValueError):
            raise Http404("Not a valid number for page.")

        if page_no < 1:
            raise Http404("Pages should be 1 or greater.")

        start_offset = (page_no - 1) * self.results_per_page
        self.results[start_offset:start_offset + self.results_per_page]

        paginator = P4lPaginator(self.results, self.results_per_page)

        try:
            page = paginator.page(page_no)
        except InvalidPage:
            raise Http404("No such page!")

        return (paginator, page)