module Effective
  module Resources
    module Actions

      # This was written for the Edit actions fallback templates and Datatables
      # Effective::Resource.new('admin/posts').routes[:index]
      def routes
        @_routes ||= (
          matches = [[namespace, plural_name].compact.join('/'), [namespace, name].compact.join('/')]

          Rails.application.routes.routes.select do |route|
            matches.any? { |match| match == route.defaults[:controller] }
          end.inject({}) do |h, route|
            h[route.defaults[:action].to_sym] = route; h
          end
        )
      end

      # Effective::Resource.new('admin/posts').action_path_helper(:edit) => 'edit_admin_posts_path'
      # This will return empty for create, update and destroy
      def action_path_helper(action)
        return unless routes[action]
        return (routes[action].name + '_path') if routes[action].name.present?
      end

      # Effective::Resource.new('admin/posts').action_path(:edit, Post.last) => '/admin/posts/3/edit'
      # Will work for any action. Returns the real path
      def action_path(action, resource = nil, opts = {})
        return unless routes[action]

        # edge case: Effective::Resource.new('admin/comments').action_path(:new, @post)
        if resource.present? && !resource.kind_of?(klass)
          if (bt = belongs_to(resource)).present? && instance.respond_to?("#{bt.name}=")
            return routes[action].format(klass.new(bt.name => resource)).presence
          end
        end

        routes[action].format(resource || instance).presence
      end

      def actions
        routes.keys
      end

      # GET actions
      def collection_actions
        routes.values.map { |route| route.defaults[:action].to_sym if is_get_route?(route) && !is_member_route?(route) }.compact - crud_actions
      end

      # GET actions
      def member_actions
        routes.values.map { |route| route.defaults[:action].to_sym if is_get_route?(route) && is_member_route?(route) }.compact - crud_actions
      end

      # POST/PUT/PATCH actions
      def member_post_actions
        routes.values.map { |route| route.defaults[:action].to_sym if is_post_route?(route) && is_member_route?(route) }.compact - crud_actions
      end

      # Same as controller_path in the view
      def controller_path
        [namespace, plural_name].compact * '/'
      end

      private

      def crud_actions
        %i(index new create show edit update destroy)
      end

      def is_member_route?(route)
        (route.path.required_names || []).include?('id')
      end

      def is_get_route?(route)
        route.verb.to_s.include?('GET')
      end

      def is_post_route?(route)
        ['POST', 'PUT', 'PATCH'].any? { |verb| route.verb == verb }
      end

    end
  end
end