require 'abstract_unit'

module Admin; class User; end; end

module ParamsWrapperTestHelp
  def with_default_wrapper_options(&block)
    @controller.class._set_wrapper_options({:format => [:json]})
    @controller.class.inherited(@controller.class)
    yield
  end

  def assert_parameters(expected)
    assert_equal expected, self.class.controller_class.last_parameters
  end
end

class ParamsWrapperTest < ActionController::TestCase
  include ParamsWrapperTestHelp

  class UsersController < ActionController::Base
    class << self
      attr_accessor :last_parameters
    end

    def parse
      self.class.last_parameters = request.params.except(:controller, :action)
      head :ok
    end
  end

  class User
    def self.attribute_names
      []
    end
  end

  class Person
    def self.attribute_names
      []
    end
  end

  tests UsersController

  def teardown
    UsersController.last_parameters = nil
  end

  def test_filtered_parameters
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu' }
      assert_equal @request.filtered_parameters, { 'controller' => 'params_wrapper_test/users', 'action' => 'parse', 'username' => 'sikachu', 'user' => { 'username' => 'sikachu' } }
    end
  end

  def test_derived_name_from_controller
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu' }
      assert_parameters({ 'username' => 'sikachu', 'user' => { 'username' => 'sikachu' }})
    end
  end

  def test_specify_wrapper_name
    with_default_wrapper_options do
      UsersController.wrap_parameters :person

      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu' }
      assert_parameters({ 'username' => 'sikachu', 'person' => { 'username' => 'sikachu' }})
    end
  end

  def test_specify_wrapper_model
    with_default_wrapper_options do
      UsersController.wrap_parameters Person

      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu' }
      assert_parameters({ 'username' => 'sikachu', 'person' => { 'username' => 'sikachu' }})
    end
  end

  def test_specify_include_option
    with_default_wrapper_options do
      UsersController.wrap_parameters :include => :username

      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
      assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'user' => { 'username' => 'sikachu' }})
    end
  end

  def test_specify_exclude_option
    with_default_wrapper_options do
      UsersController.wrap_parameters :exclude => :title

      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
      assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'user' => { 'username' => 'sikachu' }})
    end
  end

  def test_specify_both_wrapper_name_and_include_option
    with_default_wrapper_options do
      UsersController.wrap_parameters :person, :include => :username

      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
      assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'person' => { 'username' => 'sikachu' }})
    end
  end

  def test_not_enabled_format
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/xml'
      post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
      assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer' })
    end
  end

  def test_wrap_parameters_false
    with_default_wrapper_options do
      UsersController.wrap_parameters false
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
      assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer' })
    end
  end

  def test_specify_format
    with_default_wrapper_options do
      UsersController.wrap_parameters :format => :xml

      @request.env['CONTENT_TYPE'] = 'application/xml'
      post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
      assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'user' => { 'username' => 'sikachu', 'title' => 'Developer' }})
    end
  end

  def test_not_wrap_reserved_parameters
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'authenticity_token' => 'pwned', '_method' => 'put', 'utf8' => '&#9731;', 'username' => 'sikachu' }
      assert_parameters({ 'authenticity_token' => 'pwned', '_method' => 'put', 'utf8' => '&#9731;', 'username' => 'sikachu', 'user' => { 'username' => 'sikachu' }})
    end
  end

  def test_no_double_wrap_if_key_exists
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'user' => { 'username' => 'sikachu' }}
      assert_parameters({ 'user' => { 'username' => 'sikachu' }})
    end
  end

  def test_nested_params
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'person' => { 'username' => 'sikachu' }}
      assert_parameters({ 'person' => { 'username' => 'sikachu' }, 'user' => {'person' => { 'username' => 'sikachu' }}})
    end
  end

  def test_derived_wrapped_keys_from_matching_model
    assert_called(User, :attribute_names, times: 2, returns: ["username"]) do
      with_default_wrapper_options do
        @request.env['CONTENT_TYPE'] = 'application/json'
        post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
        assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'user' => { 'username' => 'sikachu' }})
      end
    end
  end

  def test_derived_wrapped_keys_from_specified_model
    with_default_wrapper_options do
      assert_called(Person, :attribute_names, times: 2, returns: ["username"]) do
        UsersController.wrap_parameters Person

        @request.env['CONTENT_TYPE'] = 'application/json'
        post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
        assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'person' => { 'username' => 'sikachu' }})
      end
    end
  end

  def test_not_wrapping_abstract_model
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
      assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'user' => { 'username' => 'sikachu', 'title' => 'Developer' }})
    end
  end

  def test_preserves_query_string_params
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/json'
      get :parse, params: { 'user' => { 'username' => 'nixon' } }
      assert_parameters(
        {'user' => { 'username' => 'nixon' } }
      )
    end
  end

  def test_empty_parameter_set
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: {}
      assert_parameters(
        {'user' => { } }
      )
    end
  end

  def test_handles_empty_content_type
    with_default_wrapper_options do
      @request.env["CONTENT_TYPE"] = nil
      _controller_class.dispatch(:parse, @request, @response)

      assert_equal 200, @response.status
      assert_equal "", @response.body
    end
  end
end

class NamespacedParamsWrapperTest < ActionController::TestCase
  include ParamsWrapperTestHelp

  module Admin
    module Users
      class UsersController < ActionController::Base;
        class << self
          attr_accessor :last_parameters
        end

        def parse
          self.class.last_parameters = request.params.except(:controller, :action)
          head :ok
        end
      end
    end
  end

  class SampleOne
    def self.attribute_names
      ["username"]
    end
  end

  class SampleTwo
    def self.attribute_names
      ["title"]
    end
  end

  tests Admin::Users::UsersController

  def teardown
    Admin::Users::UsersController.last_parameters = nil
  end

  def test_derived_name_from_controller
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu' }
      assert_parameters({'username' => 'sikachu', 'user' => { 'username' => 'sikachu' }})
    end
  end

  def test_namespace_lookup_from_model
    Admin.const_set(:User, Class.new(SampleOne))
    begin
      with_default_wrapper_options do
        @request.env['CONTENT_TYPE'] = 'application/json'
        post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
        assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'user' => { 'username' => 'sikachu' }})
      end
    ensure
      Admin.send :remove_const, :User
    end
  end

  def test_hierarchy_namespace_lookup_from_model
    Object.const_set(:User, Class.new(SampleTwo))
    begin
      with_default_wrapper_options do
        @request.env['CONTENT_TYPE'] = 'application/json'
        post :parse, params: { 'username' => 'sikachu', 'title' => 'Developer' }
        assert_parameters({ 'username' => 'sikachu', 'title' => 'Developer', 'user' => { 'title' => 'Developer' }})
      end
    ensure
      Object.send :remove_const, :User
    end
  end

end

class AnonymousControllerParamsWrapperTest < ActionController::TestCase
  include ParamsWrapperTestHelp

  tests(Class.new(ActionController::Base) do
    class << self
      attr_accessor :last_parameters
    end

    def parse
      self.class.last_parameters = request.params.except(:controller, :action)
      head :ok
    end
  end)

  def test_does_not_implicitly_wrap_params
    with_default_wrapper_options do
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu' }
      assert_parameters({ 'username' => 'sikachu' })
    end
  end

  def test_does_wrap_params_if_name_provided
    with_default_wrapper_options do
      @controller.class.wrap_parameters(:name => "guest")
      @request.env['CONTENT_TYPE'] = 'application/json'
      post :parse, params: { 'username' => 'sikachu' }
      assert_parameters({ 'username' => 'sikachu', 'guest' => { 'username' => 'sikachu' }})
    end
  end
end

class IrregularInflectionParamsWrapperTest < ActionController::TestCase
  include ParamsWrapperTestHelp

  class ParamswrappernewsItem
    def self.attribute_names
      ['test_attr']
    end
  end

  class ParamswrappernewsController < ActionController::Base
    class << self
      attr_accessor :last_parameters
    end

    def parse
      self.class.last_parameters = request.params.except(:controller, :action)
      head :ok
    end
  end

  tests ParamswrappernewsController

  def test_uses_model_attribute_names_with_irregular_inflection
    with_dup do
      ActiveSupport::Inflector.inflections do |inflect|
        inflect.irregular 'paramswrappernews_item', 'paramswrappernews'
      end

      with_default_wrapper_options do
        @request.env['CONTENT_TYPE'] = 'application/json'
        post :parse, params: { 'username' => 'sikachu', 'test_attr' => 'test_value' }
        assert_parameters({ 'username' => 'sikachu', 'test_attr' => 'test_value', 'paramswrappernews_item' => { 'test_attr' => 'test_value' }})
      end
    end
  end

  private

  def with_dup
    original = ActiveSupport::Inflector::Inflections.instance_variable_get(:@__instance__)[:en]
    ActiveSupport::Inflector::Inflections.instance_variable_set(:@__instance__, en: original.dup)
    yield
  ensure
    ActiveSupport::Inflector::Inflections.instance_variable_set(:@__instance__, en: original)
  end
end
