module Jekyll::PaginateV2::AutoPages

def self.autopage_create(autopage_config, pagination_config, posts_to_use, configkey_name, indexkey_name, createpage_lambda )
  if !autopage_config[configkey_name].nil?
    ap_sub_config = autopage_config[configkey_name]
    if ap_sub_config ['enabled']
      Jekyll.logger.info "AutoPages:","Generating #{configkey_name} pages"
      # Roll through all documents in the posts collection and extract the tags

      index_keys = Utils.ap_index_posts_by(posts_to_use, indexkey_name) # Cannot use just the posts here, must use all things.. posts, collections...

      index_keys.each do |index_key, value|
        # Iterate over each layout specified in the config

        ap_sub_config ['layouts'].each do | layout_name |
          # Use site.dest here as these pages are never created in the actual source but only inside the _site folder

          createpage_lambda.call(ap_sub_config, pagination_config, layout_name, index_key, value[-1]) # the last item in the value array will be the display name

        end
      end
    else
      Jekyll.logger.info "AutoPages:","#{configkey_name} pages are disabled/not configured in site.config."
    end
  end
end

def self.create_autopages(site)
  # Get the configuration for the auto pages

  autopage_config = Jekyll::Utils.deep_merge_hashes(DEFAULT, site.config['autopages'] || {})
  pagination_config = Jekyll::Utils.deep_merge_hashes(Jekyll::PaginateV2::Generator::DEFAULT, site.config['pagination'] || {})
  # If disabled then don't do anything

  if !autopage_config['enabled'] || autopage_config['enabled'].nil?
    Jekyll.logger.info "AutoPages:","Disabled/Not configured in site.config."
    return
  end
  # TODO: Should I detect here and disable if we're running the legacy paginate code???!

  # Simply gather all documents across all pages/posts/collections that we have

  # we could be generating quite a few empty pages but the logic is just vastly simpler than trying to 

  # figure out what tag/category belong to which collection.

  posts_to_use = Utils.collect_all_docs(site.collections)
  ###############################################

  # Generate the Tag pages if enabled

  createtagpage_lambda = lambda do | autopage_tag_config, pagination_config, layout_name, tag, tag_original_name |
    site.pages << TagAutoPage.new(site, site.dest, autopage_tag_config, pagination_config, layout_name, tag, tag_original_name)
  end
  autopage_create(autopage_config, pagination_config, posts_to_use, 'tags', 'tags', createtagpage_lambda) # Call the actual function

  
  ###############################################

  # Generate the category pages if enabled

  createcatpage_lambda = lambda do | autopage_cat_config, pagination_config, layout_name, category, category_original_name |
    site.pages << CategoryAutoPage.new(site, site.dest, autopage_cat_config, pagination_config, layout_name, category, category_original_name)
  end
  autopage_create(autopage_config, pagination_config,posts_to_use, 'categories', 'categories', createcatpage_lambda) # Call the actual function

  
  ###############################################

  # Generate the Collection pages if enabled

  createcolpage_lambda = lambda do | autopage_col_config, pagination_config, layout_name, coll_name, coll_original_name |
    site.pages << CollectionAutoPage.new(site, site.dest, autopage_col_config, pagination_config, layout_name, coll_name, coll_original_name)
  end
  autopage_create(autopage_config, pagination_config,posts_to_use, 'collections', '__coll', createcolpage_lambda) # Call the actual function


end # create_autopages