module CamaleonCms
  module ThemeHelper
    def theme_init
      @_front_breadcrumb = []
    end

    # return theme full asset path
    # theme_name: theme name, if nil, then will use current theme
    # asset: asset file name, if asset is present return full path to this asset
    # sample: <script src="<%= theme_asset_path("js/admin.js") %>"></script> => return: /assets/themes/my_theme/assets/js/admin-54505620f.js
    def theme_asset_path(asset = nil, theme_name = nil)
      return theme_asset_url(theme_name, current_theme.slug) if theme_name.present? && theme_name.include?('/')

      settings = theme_name.present? ? PluginRoutes.theme_info(theme_name) : current_theme.settings
      folder_name = settings['key']
      if settings['gem_mode']
        "themes/#{folder_name}/#{asset}"
      else
        "themes/#{folder_name}/assets/#{asset}"
      end
    end
    alias theme_asset theme_asset_path
    alias theme_gem_asset theme_asset_path

    # return the full url for asset of current theme:
    # asset: (String) asset name
    # theme_name: (optional) theme name, default (current theme caller to this function)
    # sample:
    #   theme_asset_url("css/main.css") => return: http://myhost.com/assets/themes/my_theme/assets/css/main-54505620f.css
    def theme_asset_url(asset, theme_name = nil)
      p = theme_asset_path(asset, theme_name)
      begin
        ActionController::Base.helpers.asset_url(p)
      rescue NoMethodError
        p
      end
    end

    # return theme view path including the path of current theme
    # view_name: name of the view or template
    # sample: theme_view("index") => "themes/my_theme/index"
    def theme_view(view_name, deprecated_attr = '')
      view_name = deprecated_attr if deprecated_attr.present?
      if current_theme.settings['gem_mode']
        "themes/#{current_theme.slug}/#{view_name}"
      else
        "themes/#{current_theme.slug}/views/#{view_name}"
      end
    end

    # assign the layout for this request
    # asset: asset file name, if asset is present return full path to this asset
    # layout_name: layout name
    def theme_layout(layout_name, _theme_name = nil)
      if current_theme.settings['gem_mode']
        "themes/#{current_theme.slug}/layouts/#{layout_name}"
      else
        "themes/#{current_theme.slug}/views/layouts/#{layout_name}"
      end
    end

    # return theme key for current theme file (helper|controller|view)
    # DEPRECATED, instead use: current_theme
    # index: internal control
    def self_theme_key(index = 0)
      k = '/themes/'
      f = caller[index]
      return unless f.include?(k)

      f.split(k).last.split('/').first
    end

    # returns file system path to theme asset
    # theme_name: theme name, if nil, then will use current theme
    # asset: asset file name, if asset is present return full path to this asset
    # sample: theme_asset_file_path('images/foo.jpg') => return: /home/camaleon/my-site/app/apps/themes/default/assets/images/foo.jpg
    def theme_asset_file_path(asset = nil, theme_name = nil)
      theme_path = current_theme.settings['path']
      if theme_name && (theme = Theme.where(name: theme_name).first)
        theme_path = theme.settings['path']
      end
      "#{theme_path}/assets/#{asset}"
    end

    # Returns a default message if no pages exist
    def theme_home_page
      current_site.the_post(current_theme.get_field('home_page')) ||
        current_site.the_posts('page').first ||
        CamaleonCms::Post.new(title: 'Hello World!',
                              content: 'Please add a page.',
                              status: 'published')
    end
  end
end