require "abstract_unit"
require "set"

module AbstractController
  module Testing
    # Test basic dispatching.
    # ====
    # * Call process
    # * Test that the response_body is set correctly
    class SimpleController < AbstractController::Base
    end

    class Me < SimpleController
      def index
        self.response_body = "Hello world"
        "Something else"
      end
    end

    class TestBasic < ActiveSupport::TestCase
      test "dispatching works" do
        controller = Me.new
        controller.process(:index)
        assert_equal "Hello world", controller.response_body
      end
    end

    # Test Render mixin
    # ====
    class RenderingController < AbstractController::Base
      include AbstractController::Rendering
      include ActionView::Rendering

      def _prefixes
        []
      end

      def render(options = {})
        if options.is_a?(String)
          options = { _template_name: options }
        end
        super
      end

      append_view_path File.expand_path(File.join(File.dirname(__FILE__), "views"))
    end

    class Me2 < RenderingController
      def index
        render "index.erb"
      end

      def index_to_string
        self.response_body = render_to_string "index"
      end

      def action_with_ivars
        @my_ivar = "Hello"
        render "action_with_ivars.erb"
      end

      def naked_render
        render
      end

      def rendering_to_body
        self.response_body = render_to_body template: "naked_render"
      end

      def rendering_to_string
        self.response_body = render_to_string template: "naked_render"
      end
    end

    class TestRenderingController < ActiveSupport::TestCase
      def setup
        @controller = Me2.new
      end

      test "rendering templates works" do
        @controller.process(:index)
        assert_equal "Hello from index.erb", @controller.response_body
      end

      test "render_to_string works with a String as an argument" do
        @controller.process(:index_to_string)
        assert_equal "Hello from index.erb", @controller.response_body
      end

      test "rendering passes ivars to the view" do
        @controller.process(:action_with_ivars)
        assert_equal "Hello from index_with_ivars.erb", @controller.response_body
      end

      test "rendering with no template name" do
        @controller.process(:naked_render)
        assert_equal "Hello from naked_render.erb", @controller.response_body
      end

      test "rendering to a rack body" do
        @controller.process(:rendering_to_body)
        assert_equal "Hello from naked_render.erb", @controller.response_body
      end

      test "rendering to a string" do
        @controller.process(:rendering_to_string)
        assert_equal "Hello from naked_render.erb", @controller.response_body
      end
    end

    # Test rendering with prefixes
    # ====
    # * self._prefix is used when defined
    class PrefixedViews < RenderingController
      private
        def self.prefix
          name.underscore
        end

        def _prefixes
          [self.class.prefix]
        end
    end

    class Me3 < PrefixedViews
      def index
        render
      end

      def formatted
        self.formats = [:html]
        render
      end
    end

    class TestPrefixedViews < ActiveSupport::TestCase
      def setup
        @controller = Me3.new
      end

      test "templates are located inside their 'prefix' folder" do
        @controller.process(:index)
        assert_equal "Hello from me3/index.erb", @controller.response_body
      end

      test "templates included their format" do
        @controller.process(:formatted)
        assert_equal "Hello from me3/formatted.html.erb", @controller.response_body
      end
    end

    class OverridingLocalPrefixes < AbstractController::Base
      include AbstractController::Rendering
      include ActionView::Rendering
      append_view_path File.expand_path(File.join(File.dirname(__FILE__), "views"))

      def index
        render
      end

      def self.local_prefixes
        # this would usually return "abstract_controller/testing/overriding_local_prefixes"
        super + ["abstract_controller/testing/me3"]
      end

      class Inheriting < self
      end
    end

    class OverridingLocalPrefixesTest < ActiveSupport::TestCase
      test "overriding .local_prefixes adds prefix" do
        @controller = OverridingLocalPrefixes.new
        @controller.process(:index)
        assert_equal "Hello from me3/index.erb", @controller.response_body
      end

      test ".local_prefixes is inherited" do
        @controller = OverridingLocalPrefixes::Inheriting.new
        @controller.process(:index)
        assert_equal "Hello from me3/index.erb", @controller.response_body
      end
    end

    # Test rendering with layouts
    # ====
    # self._layout is used when defined
    class WithLayouts < PrefixedViews
      include ActionView::Layouts

      private
        def self.layout(formats)
          find_template(name.underscore, { formats: formats }, _prefixes: ["layouts"])
        rescue ActionView::MissingTemplate
          begin
            find_template("application", { formats: formats }, _prefixes: ["layouts"])
          rescue ActionView::MissingTemplate
          end
        end

        def render_to_body(options = {})
          options[:_layout] = options[:layout] || _default_layout({})
          super
        end
    end

    class Me4 < WithLayouts
      def index
        render
      end
    end

    class TestLayouts < ActiveSupport::TestCase
      test "layouts are included" do
        controller = Me4.new
        controller.process(:index)
        assert_equal "Me4 Enter : Hello from me4/index.erb : Exit", controller.response_body
      end
    end

    # respond_to_action?(action_name)
    # ====
    # * A method can be used as an action only if this method
    #   returns true when passed the method name as an argument
    # * Defaults to true in AbstractController
    class DefaultRespondToActionController < AbstractController::Base
      def index() self.response_body = "success" end
    end

    class ActionMissingRespondToActionController < AbstractController::Base
    # No actions
    private
      def action_missing(action_name)
        self.response_body = "success"
      end
    end

    class RespondToActionController < AbstractController::Base;
      def index() self.response_body = "success" end

      def fail()  self.response_body = "fail"    end

    private

      def method_for_action(action_name)
        action_name.to_s != "fail" && action_name
      end
    end

    class TestRespondToAction < ActiveSupport::TestCase
      def assert_dispatch(klass, body = "success", action = :index)
        controller = klass.new
        controller.process(action)
        assert_equal body, controller.response_body
      end

      test "an arbitrary method is available as an action by default" do
        assert_dispatch DefaultRespondToActionController, "success", :index
      end

      test "raises ActionNotFound when method does not exist and action_missing is not defined" do
        assert_raise(ActionNotFound) { DefaultRespondToActionController.new.process(:fail) }
      end

      test "dispatches to action_missing when method does not exist and action_missing is defined" do
        assert_dispatch ActionMissingRespondToActionController, "success", :ohai
      end

      test "a method is available as an action if method_for_action returns true" do
        assert_dispatch RespondToActionController, "success", :index
      end

      test "raises ActionNotFound if method is defined but method_for_action returns false" do
        assert_raise(ActionNotFound) { RespondToActionController.new.process(:fail) }
      end
    end

    class Me6 < AbstractController::Base
      action_methods

      def index
      end
    end

    class TestActionMethodsReloading < ActiveSupport::TestCase
      test "action_methods should be reloaded after defining a new method" do
        assert_equal Set.new(["index"]), Me6.action_methods
      end
    end
  end
end
