import os
from xml.dom.minidom import parse, parseString
from dynastie.generators.generator import DynastieGenerator
from dynastie.generators.index import Index
from django.db import models

class Tag(Index):

    cur_page = 0
    nb_pages = 0
    cur_post = 0
    posts_per_page = 0
    filename = 'index'
    dirname = ''
    cur_tag = None

    def createTag(self, posts, dom, root, node):
        if node.hasAttribute('name'):
            self.replaceByText(dom, root, node, self.cur_tag.name)
        if node.hasAttribute('description'):
            self.replaceByText(dom, root, node, self.cur_tag.description)
        return None

    def generate(self, blog, src, output):
        from dynastie.models import Post, Blog, Tag

        self.hooks = {'posts' : self.createPosts,
                      'navigation' : self.createNavigation,
                      'tag' : self.createTag,
                      'tags' : self.createTags,
                      'replace' : self.createReplace}

        dom = self.parseTemplate(blog, src, output, 'tag', 'tag')
        if dom is None: return self.report

        tags = Tag.objects.all()

        for tag in tags:
            self.cur_tag = tag
            posts = Post.objects.filter(tags__in=[tag.id], published=True).order_by('-creation_date')

            self.nb_pages = 0
            self.cur_page = 0
            self.cur_post = 0

            self.dirname = '/tag/' + tag.name_slug

            self.generatePages(dom, posts, src, output, 'tag', 'tag')

        if not self.somethingWrote:
            self.addReport('Nothing changed')

        return self.report