require 'rails_helper'

describe ActiveAdmin::ResourceController do

  let(:controller) { ActiveAdmin::ResourceController.new }

  describe "authenticating the user" do
    let(:controller){ Admin::PostsController.new }

    it "should do nothing when no authentication_method set" do
      namespace = controller.class.active_admin_config.namespace
      expect(namespace).to receive(:authentication_method).once.and_return(nil)

      controller.send(:authenticate_active_admin_user)
    end

    it "should call the authentication_method when set" do
      namespace = controller.class.active_admin_config.namespace

      expect(namespace).to receive(:authentication_method).twice.
        and_return(:authenticate_admin_user!)

      expect(controller).to receive(:authenticate_admin_user!).and_return(true)

      controller.send(:authenticate_active_admin_user)
    end

  end

  describe "retrieving the current user" do
    let(:controller){ Admin::PostsController.new }

    it "should return nil when no current_user_method set" do
      namespace = controller.class.active_admin_config.namespace
      expect(namespace).to receive(:current_user_method).once.and_return(nil)

      expect(controller.send(:current_active_admin_user)).to eq nil
    end

    it "should call the current_user_method when set" do
      user = double
      namespace = controller.class.active_admin_config.namespace

      expect(namespace).to receive(:current_user_method).twice.
        and_return(:current_admin_user)

      expect(controller).to receive(:current_admin_user).and_return(user)

      expect(controller.send(:current_active_admin_user)).to eq user
    end
  end


  describe "callbacks" do
    before :all do
      application = ::ActiveAdmin::Application.new
      namespace = ActiveAdmin::Namespace.new(application, :admin)
      namespace.register Post do
        after_build :call_after_build
        before_save :call_before_save
        after_save :call_after_save
        before_create :call_before_create
        after_create :call_after_create
        before_update :call_before_update
        after_update :call_after_update
        before_destroy :call_before_destroy
        after_destroy :call_after_destroy

        controller do
          def call_after_build(obj); end
          def call_before_save(obj); end
          def call_after_save(obj); end
          def call_before_create(obj); end
          def call_after_create(obj); end
          def call_before_update(obj); end
          def call_after_update(obj); end
          def call_before_destroy(obj); end
          def call_after_destroy(obj); end
        end
      end
    end

    describe "performing create" do
      let(:controller){ Admin::PostsController.new }
      let(:resource){ double("Resource", save: true) }

      before do
        expect(resource).to receive(:save)
      end

      it "should call the before create callback" do
        expect(controller).to receive(:call_before_create).with(resource)
        controller.send :create_resource, resource
      end
      it "should call the before save callback" do
        expect(controller).to receive(:call_before_save).with(resource)
        controller.send :create_resource, resource
      end
      it "should call the after save callback" do
        expect(controller).to receive(:call_after_save).with(resource)
        controller.send :create_resource, resource
      end
      it "should call the after create callback" do
        expect(controller).to receive(:call_after_create).with(resource)
        controller.send :create_resource, resource
      end
    end

    describe "performing update" do
      let(:controller){ Admin::PostsController.new }
      let(:resource){ double("Resource", :attributes= => true, save: true) }
      let(:attributes){ [{}] }

      before do
        expect(resource).to receive(:attributes=).with(attributes[0])
        expect(resource).to receive(:save)
      end

      it "should call the before update callback" do
        expect(controller).to receive(:call_before_update).with(resource)
        controller.send :update_resource, resource, attributes
      end
      it "should call the before save callback" do
        expect(controller).to receive(:call_before_save).with(resource)
        controller.send :update_resource, resource, attributes
      end
      it "should call the after save callback" do
        expect(controller).to receive(:call_after_save).with(resource)
        controller.send :update_resource, resource, attributes
      end
      it "should call the after create callback" do
        expect(controller).to receive(:call_after_update).with(resource)
        controller.send :update_resource, resource, attributes
      end
    end

    describe "performing destroy" do
      let(:controller){ Admin::PostsController.new }
      let(:resource){ double("Resource", destroy: true) }

      before do
        expect(resource).to receive(:destroy)
      end

      it "should call the before destroy callback" do
        expect(controller).to receive(:call_before_destroy).with(resource)
        controller.send :destroy_resource, resource
      end

      it "should call the after destroy callback" do
        expect(controller).to receive(:call_after_destroy).with(resource)
        controller.send :destroy_resource, resource
      end
    end
  end
end

describe Admin::PostsController, type: "controller" do

  describe 'retreiving the resource' do
    let(:controller){ Admin::PostsController.new }
    let(:post) { Post.new title: "An incledibly unique Post Title" }

    before do
      allow(Post).to receive(:find).and_return(post)
      controller.class_eval { public :resource }
      allow(controller).to receive(:params).and_return({ id: '1' })
    end

    subject { controller.resource }

    it "returns a Post" do
      expect(subject).to be_kind_of(Post)
    end

    context 'with a decorator' do
      let(:config) { controller.class.active_admin_config }
      before { config.decorator_class_name = '::PostDecorator' }
      it 'returns a PostDecorator' do
        expect(subject).to be_kind_of(PostDecorator)
      end

      it 'returns a PostDecorator that wraps the post' do
        expect(subject.title).to eq post.title
      end
    end
  end

  describe 'retreiving the resource collection' do
    let(:controller){ Admin::PostsController.new }
    let(:config) { controller.class.active_admin_config }
    before do
      Post.create!(title: "An incledibly unique Post Title") if Post.count == 0
      config.decorator_class_name = nil
      request = double 'Request', format: 'application/json'
      allow(controller).to receive(:params) { {} }
      allow(controller).to receive(:request){ request }
    end

    subject { controller.send :collection }

    it {
      is_expected.to be_a ActiveRecord::Relation
    }

    it "returns a collection of posts" do
      expect(subject.first).to be_kind_of(Post)
    end

    context 'with a decorator' do
      before { config.decorator_class_name = 'PostDecorator' }

      it 'returns a collection decorator using PostDecorator' do
        expect(subject).to be_a Draper::CollectionDecorator
        expect(subject.decorator_class).to eq PostDecorator
      end

      it 'returns a collection decorator that wraps the post' do
        expect(subject.first.title).to eq Post.first.title
      end
    end
  end


  describe "performing batch_action" do
    let(:controller){ Admin::PostsController.new }
    let(:batch_action) { ActiveAdmin::BatchAction.new :flag, "Flag", &batch_action_block }
    let(:batch_action_block) { proc { } }
    before do
      allow(controller.class.active_admin_config).to receive(:batch_actions).and_return([batch_action])
    end

    describe "when params batch_action matches existing BatchAction" do
      before do
        allow(controller).to receive(:params) { { batch_action: "flag", collection_selection: ["1"] } }
      end

      it "should call the block with args" do
        expect(controller).to receive(:instance_exec).with(["1"], {})
        controller.batch_action
      end

      it "should call the block in controller scope" do
        expect(controller).to receive(:render_in_context).with(controller, nil).and_return({})
        controller.batch_action
      end
    end

    describe "when params batch_action doesn't match a BatchAction" do
      it "should raise an error" do
        allow(controller).to receive(:params) { { batch_action: "derp", collection_selection: ["1"] } }
        expect {
          controller.batch_action
        }.to raise_error("Couldn't find batch action \"derp\"")
      end
    end

    describe "when params batch_action is blank" do
      it "should raise an error" do
        allow(controller).to receive(:params) { { collection_selection: ["1"] } }
        expect {
          controller.batch_action
        }.to raise_error("Couldn't find batch action \"\"")
      end
    end

  end

end