# -*- coding: utf-8 -*-

#    (c) 2016 t.animal licensed under GPL v3

#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.

#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.

#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.


from __future__ import unicode_literals, print_function
from nikola.plugin_categories import ConfigPlugin

import nikola


class MetaNavigation(ConfigPlugin):
    """Adds some meta information to the GLOBAL_CONTEXT variable
       for access in themes.
    """

    name = 'metanavigation'

    def set_site(self, site):
        site.scan_posts()

        metaNavDict = {}

        if "META_NAV_SECTIONWISE" in site.GLOBAL_CONTEXT and \
            site.GLOBAL_CONTEXT["META_NAV_SECTIONWISE"] and site.config["POSTS_SECTIONS"]:

            availableSections = list(set([post.section_slug() for post in site.all_posts]))
            metaNavDict["available_sections"] = availableSections

            for section in availableSections:
                #this collides if a section is called available_sections :(
                metaNavDict[section] = {
                    "years": [x for x in site.posts_per_year if any(filter(lambda p: p.section_slug() == section, site.posts_per_year[x]))],
                    "categories": [x for x in site.posts_per_category if any(filter(lambda p: p.section_slug() == section, site.posts_per_category[x]))],
                    "tags": [x for x in site.posts_per_tag if any(filter(lambda p: p.section_slug() == section, site.posts_per_category[x]))],
                    "section_description":  site.config["POSTS_SECTION_DESCRIPTIONS"][nikola.utils.LocaleBorg().current_lang]
                }

        else:
            metaNavDict = {
                    "years": [x for x in site.posts_per_year],
                    "categories": [x for x in site.posts_per_category],
                    "tags": [x for x in site.posts_per_tag]
            }

            if site.config["POSTS_SECTIONS"]:
                metaNavDict["section_description"] = site.config["POSTS_SECTION_DESCRIPTIONS"][nikola.utils.LocaleBorg().current_lang]

        site.GLOBAL_CONTEXT["metanavigation"] = metaNavDict

        super(MetaNavigation, self).set_site(site)