module API<%= api_version %>
  class <%= res_name.classify.pluralize %> < Grape::API
    rescue_from NotFoundError, ActiveRecord::RecordNotFound do |exception|
      error!('<%= res_name.classify %> not found', 404)
    end

    rescue_from ActiveRecord::RecordInvalid do |exception|
      error!(exception.message, 409)
    end


    helpers do
      def return_no_content_status
        status :no_content
        ''
      end

      def <%= res_name %>_params(params)
        {
<% res_attrs.each_key do |name| -%>
          <%= name %>: params[:<%= name %>],
<% end -%>
        }
      end
    end


    resource :<%= res_name.pluralize %> do
      # GET '<%= api_version%>/<%= res_name.pluralize %>'
      desc 'Returns <%= res_name.pluralize %> list'
      get do
        present <%= res_name.classify %>.all, with: API::Entities::<%= res_name.classify %>
      end


      # GET '<%= api_version%>/<%= res_name.pluralize %>/:id'
      desc 'Returns <%= res_name %> by id'
      params do
        requires :id, type: Integer
      end
      get ':id' do
        <%= res_name %> = <%= res_name.classify %>.find(params[:id])
        raise NotFoundError if <%= res_name %>.nil?

        present <%= res_name %>, with: API::Entities::<%= res_name.classify %>
      end


      # POST '<%= api_version%>/<%= res_name.pluralize %>'
      desc 'Creates new <%= res_name %>'
<% unless res_attrs.empty? -%>
      params do
<% res_attrs.each do |name, type| -%>
        requires :<%= name %>, type: <%= param_to_type(type) %>
<% end -%>
      end
<% end -%>
      post do
        <%= res_name %> = <%= res_name.classify %>.new(<%= res_name %>_params(params))
        <%= res_name %>.save!

        present <%= res_name %>, with: API::Entities::<%= res_name.classify %>
      end


      # PUT '<%= api_version%>/<%= res_name.pluralize %>/:id'
      desc 'Updates <%= res_name %>'
      params do
        requires :id, type: Integer
<% res_attrs.each do |name, type| -%>
        requires :<%= name %>, type: <%= param_to_type(type) %>
<% end -%>
      end
      put ':id' do
        <%= res_name %> = <%= res_name.classify %>.find(params[:id])
        <%= res_name %>.update!(<%= res_name %>_params(params))

        return_no_content_status
      end


      # DELETE '<%= api_version%>/<%= res_name.pluralize %>/:id'
      desc 'Deletes <%= res_name %>'
      params do
        requires :id, type: Integer
      end
      delete ':id' do
        <%= res_name %> = <%= res_name.classify %>.find(params[:id])
        <%= res_name %>.destroy!

        return_no_content_status
      end
    end
  end
end