func init() {
	globalIDTestUserType = graphql.NewObject(graphql.ObjectConfig{
		Name: "User",
		Fields: graphql.Fields{
			"id": relay.GlobalIDField("User", nil),
			"name": &graphql.Field{
				Type: graphql.String,
			},
		},
		Interfaces: []*graphql.Interface{globalIDTestDef.NodeInterface},
	})
	photoIDFetcher := func(obj interface{}, info graphql.ResolveInfo) string {
		switch obj := obj.(type) {
		case *photo2:
			return fmt.Sprintf("%v", obj.PhotoId)
		}
		return ""
	}
	globalIDTestPhotoType = graphql.NewObject(graphql.ObjectConfig{
		Name: "Photo",
		Fields: graphql.Fields{
			"id": relay.GlobalIDField("Photo", photoIDFetcher),
			"width": &graphql.Field{
				Type: graphql.Int,
			},
		},
		Interfaces: []*graphql.Interface{globalIDTestDef.NodeInterface},
	})

	globalIDTestSchema, _ = graphql.NewSchema(graphql.SchemaConfig{
		Query: globalIDTestQueryType,
	})
}

func init() {
	nodeTestUserType = graphql.NewObject(graphql.ObjectConfig{
		Name: "User",
		Fields: graphql.FieldConfigMap{
			"id": &graphql.FieldConfig{
				Type: graphql.NewNonNull(graphql.ID),
			},
			"name": &graphql.FieldConfig{
				Type: graphql.String,
			},
		},
		Interfaces: []*graphql.Interface{nodeTestDef.NodeInterface},
	})
	nodeTestPhotoType = graphql.NewObject(graphql.ObjectConfig{
		Name: "Photo",
		Fields: graphql.FieldConfigMap{
			"id": &graphql.FieldConfig{
				Type: graphql.NewNonNull(graphql.ID),
			},
			"width": &graphql.FieldConfig{
				Type: graphql.Int,
			},
		},
		Interfaces: []*graphql.Interface{nodeTestDef.NodeInterface},
	})

	nodeTestSchema, _ = graphql.NewSchema(graphql.SchemaConfig{
		Query: nodeTestQueryType,
	})
}

func schemaWithArgOfType(ttype graphql.Type) (graphql.Schema, error) {

	badObject := graphql.NewObject(graphql.ObjectConfig{
		Name: "BadObject",
		Fields: graphql.FieldConfigMap{
			"badField": &graphql.FieldConfig{
				Type: graphql.String,
				Args: graphql.FieldConfigArgument{
					"badArg": &graphql.ArgumentConfig{
						Type: ttype,
					},
				},
			},
		},
	})
	return graphql.NewSchema(graphql.SchemaConfig{
		Query: graphql.NewObject(graphql.ObjectConfig{
			Name: "Query",
			Fields: graphql.FieldConfigMap{
				"f": &graphql.FieldConfig{
					Type: badObject,
				},
			},
		}),
	})
}

func TestMutation_ExecutionAddsErrorsFromFieldResolveFn(t *testing.T) {
	mError := errors.New("mutationError")
	q := graphql.NewObject(graphql.ObjectConfig{
		Name: "Query",
		Fields: graphql.Fields{
			"a": &graphql.Field{
				Type: graphql.String,
			},
		},
	})
	m := graphql.NewObject(graphql.ObjectConfig{
		Name: "Mutation",
		Fields: graphql.Fields{
			"foo": &graphql.Field{
				Type: graphql.String,
				Args: graphql.FieldConfigArgument{
					"f": &graphql.ArgumentConfig{
						Type: graphql.String,
					},
				},
				Resolve: func(p graphql.ResolveParams) (interface{}, error) {
					return nil, mError
				},
			},
			"bar": &graphql.Field{
				Type: graphql.String,
				Args: graphql.FieldConfigArgument{
					"b": &graphql.ArgumentConfig{
						Type: graphql.String,
					},
				},
				Resolve: func(p graphql.ResolveParams) (interface{}, error) {
					return "ok", nil
				},
			},
		},
	})
	schema, err := graphql.NewSchema(graphql.SchemaConfig{
		Query:    q,
		Mutation: m,
	})
	if err != nil {
		t.Fatalf("unexpected error, got: %v", err)
	}
	query := "mutation _ { newFoo: foo(f:\"title\") }"
	result := graphql.Do(graphql.Params{
		Schema:        schema,
		RequestString: query,
	})
	if len(result.Errors) == 0 {
		t.Fatal("wrong result, expected errors, got no errors")
	}
	if result.Errors[0].Error() != mError.Error() {
		t.Fatalf("wrong result, unexpected error, got: %v, expected: %v", result.Errors[0], mError)
	}
}

func TestTypeSystem_DefinitionExample_IncludesNestedInputObjectsInTheMap(t *testing.T) {
	nestedInputObject := graphql.NewInputObject(graphql.InputObjectConfig{
		Name: "NestedInputObject",
		Fields: graphql.InputObjectConfigFieldMap{
			"value": &graphql.InputObjectFieldConfig{
				Type: graphql.String,
			},
		},
	})
	someInputObject := graphql.NewInputObject(graphql.InputObjectConfig{
		Name: "SomeInputObject",
		Fields: graphql.InputObjectConfigFieldMap{
			"nested": &graphql.InputObjectFieldConfig{
				Type: nestedInputObject,
			},
		},
	})
	someMutation := graphql.NewObject(graphql.ObjectConfig{
		Name: "SomeMutation",
		Fields: graphql.Fields{
			"mutateSomething": &graphql.Field{
				Type: blogArticle,
				Args: graphql.FieldConfigArgument{
					"input": &graphql.ArgumentConfig{
						Type: someInputObject,
					},
				},
			},
		},
	})
	someSubscription := graphql.NewObject(graphql.ObjectConfig{
		Name: "SomeSubscription",
		Fields: graphql.Fields{
			"subscribeToSomething": &graphql.Field{
				Type: blogArticle,
				Args: graphql.FieldConfigArgument{
					"input": &graphql.ArgumentConfig{
						Type: someInputObject,
					},
				},
			},
		},
	})
	schema, err := graphql.NewSchema(graphql.SchemaConfig{
		Query:        blogQuery,
		Mutation:     someMutation,
		Subscription: someSubscription,
	})
	if err != nil {
		t.Fatalf("unexpected error, got: %v", err)
	}
	if schema.Type("NestedInputObject") != nestedInputObject {
		t.Fatalf(`schema.GetType("NestedInputObject") expected to equal nestedInputObject, got: %v`, schema.Type("NestedInputObject"))
	}
}

func TestUsesTheSubscriptionSchemaForSubscriptions(t *testing.T) {

	doc := `query Q { a } subscription S { a }`
	data := map[string]interface{}{
		"a": "b",
		"c": "d",
	}

	expected := &graphql.Result{
		Data: map[string]interface{}{
			"a": "b",
		},
	}

	schema, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: graphql.NewObject(graphql.ObjectConfig{
			Name: "Q",
			Fields: graphql.Fields{
				"a": &graphql.Field{
					Type: graphql.String,
				},
			},
		}),
		Subscription: graphql.NewObject(graphql.ObjectConfig{
			Name: "S",
			Fields: graphql.Fields{
				"a": &graphql.Field{
					Type: graphql.String,
				},
			},
		}),
	})
	if err != nil {
		t.Fatalf("Error in schema %v", err.Error())
	}

	// parse query
	ast := testutil.TestParse(t, doc)

	// execute
	ep := graphql.ExecuteParams{
		Schema:        schema,
		AST:           ast,
		Root:          data,
		OperationName: "S",
	}
	result := testutil.TestExecute(t, ep)
	if len(result.Errors) > 0 {
		t.Fatalf("wrong result, unexpected errors: %v", result.Errors)
	}
	if !reflect.DeepEqual(expected, result) {
		t.Fatalf("Unexpected result, Diff: %v", testutil.Diff(expected, result))
	}
}

func TestTypeSystem_SchemaMustContainUniquelyNamedTypes_RejectsASchemaWhichHaveSameNamedObjectsImplementingAnInterface(t *testing.T) {

	anotherInterface := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
			return nil
		},
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	})
	FirstBadObject := graphql.NewObject(graphql.ObjectConfig{
		Name: "BadObject",
		Interfaces: []*graphql.Interface{
			anotherInterface,
		},
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	})
	SecondBadObject := graphql.NewObject(graphql.ObjectConfig{
		Name: "BadObject",
		Interfaces: []*graphql.Interface{
			anotherInterface,
		},
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	})
	queryType := graphql.NewObject(graphql.ObjectConfig{
		Name: "Query",
		Fields: graphql.Fields{
			"iface": &graphql.Field{
				Type: anotherInterface,
			},
		},
	})
	_, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: queryType,
		Types: []graphql.Type{FirstBadObject, SecondBadObject},
	})
	expectedError := `Schema must contain unique named types but contains multiple types named "BadObject".`
	if err == nil || err.Error() != expectedError {
		t.Fatalf("Expected error: %v, got %v", expectedError, err)
	}
}

func getUserSchema(context *application.MyContext) graphql.Schema {
	var userType = graphql.Fields{
		"user": &graphql.Field{
			Type: graphql.NewObject(
				graphql.ObjectConfig{
					Name: "User",
					Fields: graphql.Fields{
						"id": &graphql.Field{
							Type: graphql.String,
						},
						"name": &graphql.Field{
							Type: graphql.String,
						},
						"password": &graphql.Field{
							Type: graphql.String,
						},
					},
				},
			),
			Args: graphql.FieldConfigArgument{
				"id": &graphql.ArgumentConfig{
					Type: graphql.String,
				},
			},
			Resolve: func(p graphql.ResolveParams) (interface{}, error) {
				id, isOK := p.Args["id"].(string)

				if isOK {
					var dbConnection = (context.GetDbConnection()).(*mgo.Database)
					var result = user_models.UserStruct{}
					err := dbConnection.C("users").Find(bson.M{"_id": bson.ObjectIdHex(id)}).One(&result)
					if err != nil {
						panic(err)
					}
					return result, nil
				}
				return nil, nil
			},
		},
	}
	var schema, _ = graphql.NewSchema(
		graphql.SchemaConfig{
			Query: graphql.NewObject(
				graphql.ObjectConfig{
					Name:   "UserQuery",
					Fields: userType,
				}),
		},
	)
	return schema
}

func TestDoesNotIncludeIllegalFieldsInOutput(t *testing.T) {

	doc := `mutation M {
      thisIsIllegalDontIncludeMe
    }`

	expected := &graphql.Result{
		Data: map[string]interface{}{},
	}

	schema, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: graphql.NewObject(graphql.ObjectConfig{
			Name: "Q",
			Fields: graphql.Fields{
				"a": &graphql.Field{
					Type: graphql.String,
				},
			},
		}),
		Mutation: graphql.NewObject(graphql.ObjectConfig{
			Name: "M",
			Fields: graphql.Fields{
				"c": &graphql.Field{
					Type: graphql.String,
				},
			},
		}),
	})
	if err != nil {
		t.Fatalf("Error in schema %v", err.Error())
	}

	// parse query
	ast := testutil.TestParse(t, doc)

	// execute
	ep := graphql.ExecuteParams{
		Schema: schema,
		AST:    ast,
	}
	result := testutil.TestExecute(t, ep)
	if len(result.Errors) != 0 {
		t.Fatalf("wrong result, expected len(%v) errors, got len(%v)", len(expected.Errors), len(result.Errors))
	}
	if !reflect.DeepEqual(expected, result) {
		t.Fatalf("Unexpected result, Diff: %v", testutil.Diff(expected, result))
	}
}

func TestTypeSystem_InterfaceTypesMustBeResolvable_AcceptsAnInterfaceTypeDefiningResolveType(t *testing.T) {

	anotherInterfaceType := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
			return nil
		},
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	})
	_, err := schemaWithFieldType(graphql.NewObject(graphql.ObjectConfig{
		Name:       "SomeObject",
		Interfaces: []*graphql.Interface{anotherInterfaceType},
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	}))
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
}

func TestQuery_ExecutionDoesNotAddErrorsFromFieldResolveFn(t *testing.T) {
	qError := errors.New("queryError")
	q := graphql.NewObject(graphql.ObjectConfig{
		Name: "Query",
		Fields: graphql.Fields{
			"a": &graphql.Field{
				Type: graphql.String,
				Resolve: func(p graphql.ResolveParams) (interface{}, error) {
					return nil, qError
				},
			},
			"b": &graphql.Field{
				Type: graphql.String,
				Resolve: func(p graphql.ResolveParams) (interface{}, error) {
					return "ok", nil
				},
			},
		},
	})
	blogSchema, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: q,
	})
	if err != nil {
		t.Fatalf("unexpected error, got: %v", err)
	}
	query := "{ b }"
	result := graphql.Do(graphql.Params{
		Schema:        blogSchema,
		RequestString: query,
	})
	if len(result.Errors) != 0 {
		t.Fatalf("wrong result, unexpected errors: %+v", result.Errors)
	}
}

func main() {
	// Schema
	fields := graphql.Fields{
		"hello": &graphql.Field{
			Type: graphql.String,
			Resolve: func(p graphql.ResolveParams) interface{} {
				return "world"
			},
		},
	}
	rootQuery := graphql.ObjectConfig{Name: "RootQuery", Fields: fields}
	schemaConfig := graphql.SchemaConfig{Query: graphql.NewObject(rootQuery)}
	schema, err := graphql.NewSchema(schemaConfig)
	if err != nil {
		log.Fatalf("failed to create new schema, error: %v", err)
	}

	// Query
	query := `
		{
			hello
		}
	`
	params := graphql.Params{Schema: schema, RequestString: query}
	r := graphql.Do(params)
	if len(r.Errors) > 0 {
		log.Fatalf("failed to execute graphql operation, errors: %+v", r.Errors)
	}
	rJSON, _ := json.Marshal(r)
	fmt.Printf("%s \n", rJSON) // {“data”:{“hello”:”world”}}
}

func main() {
	queryType := graphql.ObjectConfig{
		Name:        "Ping",
		Description: "Ping to get pong...",

		Fields: graphql.Fields{
			"ping": &graphql.Field{
				Type: graphql.String,
				Resolve: func(p graphql.ResolveParams) (interface{}, error) {
					return "pong", nil
				},
			},
		},
	}

	schema, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: graphql.NewObject(queryType),
	})

	if err != nil {
		panic(err)
	}

	http.HandleFunc("/graphql", customHandler(&schema))
	http.ListenAndServe(":8888", nil)
}

func TestDirectives_DirectiveNameMustBeValid(t *testing.T) {
	invalidDirective := graphql.NewDirective(graphql.DirectiveConfig{
		Name: "123invalid name",
		Locations: []string{
			graphql.DirectiveLocationField,
		},
	})
	_, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: graphql.NewObject(graphql.ObjectConfig{
			Name: "TestType",
			Fields: graphql.Fields{
				"a": &graphql.Field{
					Type: graphql.String,
				},
			},
		}),
		Directives: []*graphql.Directive{invalidDirective},
	})
	expectedErr := gqlerrors.FormattedError{
		Message:   `Names must match /^[_a-zA-Z][_a-zA-Z0-9]*$/ but "123invalid name" does not.`,
		Locations: []location.SourceLocation{},
	}
	if !reflect.DeepEqual(expectedErr, err) {
		t.Fatalf("Expected error to be equal, got: %v", testutil.Diff(expectedErr, err))
	}
}

func TestDirectives_DirectivesMustBeNamed(t *testing.T) {
	invalidDirective := graphql.NewDirective(graphql.DirectiveConfig{
		Locations: []string{
			graphql.DirectiveLocationField,
		},
	})
	_, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: graphql.NewObject(graphql.ObjectConfig{
			Name: "TestType",
			Fields: graphql.Fields{
				"a": &graphql.Field{
					Type: graphql.String,
				},
			},
		}),
		Directives: []*graphql.Directive{invalidDirective},
	})
	expectedErr := gqlerrors.FormattedError{
		Message:   "Directive must be named.",
		Locations: []location.SourceLocation{},
	}
	if !reflect.DeepEqual(expectedErr, err) {
		t.Fatalf("Expected error to be equal, got: %v", testutil.Diff(expectedErr, err))
	}
}

func newRootQuery(idx resource.Index) *graphql.Object {
	t := types{}
	if c, ok := idx.(schema.Compiler); ok {
		if err := c.Compile(); err != nil {
			log.Fatal(err)
		}
	}
	flds := graphql.Fields{}
	for _, r := range idx.GetResources() {
		if r.Conf().IsModeAllowed(resource.Read) {
			flds[r.Name()] = t.getGetQuery(idx, r)
		}
		if r.Conf().IsModeAllowed(resource.List) {
			flds[r.Name()+"List"] = t.getListQuery(idx, r, nil)
			for _, a := range r.GetAliases() {
				params, _ := r.GetAlias(a)
				flds[r.Name()+strings.Title(a)] = t.getListQuery(idx, r, params)
			}
		}
	}
	return graphql.NewObject(graphql.ObjectConfig{
		Name:   "RootQuery",
		Fields: flds,
	})
}

func TestTypeSystem_ObjectInterfacesMustBeArray_AcceptsAnObjectTypeWithArrayInterfaces(t *testing.T) {
	anotherInterfaceType := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
			return nil
		},
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	})
	_, err := schemaWithFieldType(graphql.NewObject(graphql.ObjectConfig{
		Name: "SomeObject",
		Interfaces: (graphql.InterfacesThunk)(func() []*graphql.Interface {
			return []*graphql.Interface{anotherInterfaceType}
		}),
		Fields: graphql.Fields{
			"f": &graphql.Field{
				Type: graphql.String,
			},
		},
	}))
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
}

func TestTypeSystem_InterfaceTypesMustBeResolvable_AcceptsAnInterfaceTypeDefiningResolveTypeWithImplementingTypeDefiningIsTypeOf(t *testing.T) {

	anotherInterfaceType := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(value interface{}, info graphql.ResolveInfo) *graphql.Object {
			return nil
		},
		Fields: graphql.FieldConfigMap{
			"f": &graphql.FieldConfig{
				Type: graphql.String,
			},
		},
	})
	_, err := schemaWithFieldType(graphql.NewObject(graphql.ObjectConfig{
		Name:       "SomeObject",
		Interfaces: []*graphql.Interface{anotherInterfaceType},
		IsTypeOf: func(value interface{}, info graphql.ResolveInfo) bool {
			return true
		},
		Fields: graphql.FieldConfigMap{
			"f": &graphql.FieldConfig{
				Type: graphql.String,
			},
		},
	}))
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
}

func getFields(idx resource.Index, s schema.Schema) graphql.Fields {
	flds := graphql.Fields{}
	// Iter fields
	for name, def := range s.Fields {
		if def.Hidden {
			continue
		}
		if _, ok := def.Validator.(*schema.Reference); ok {
			// Handled by addConnections to prevent dead loops
		}
		var typ graphql.Output
		if def.Schema != nil {
			typ = graphql.NewObject(graphql.ObjectConfig{
				Name:   name,
				Fields: getFields(idx, *def.Schema),
			})
		} else {
			typ = getFType(def.Validator)
		}
		flds[name] = &graphql.Field{
			Description: def.Description,
			Type:        typ,
			Args:        getFArgs(def.Params),
			Resolve:     getFResolver(name, def),
		}
	}
	return flds
}

func TestTypeSystem_SchemaMustContainUniquelyNamedTypes_RejectsASchemaWhichRedefinesABuiltInType(t *testing.T) {

	fakeString := graphql.NewScalar(graphql.ScalarConfig{
		Name: "String",
		Serialize: func(value interface{}) interface{} {
			return nil
		},
	})
	queryType := graphql.NewObject(graphql.ObjectConfig{
		Name: "Query",
		Fields: graphql.FieldConfigMap{
			"normal": &graphql.FieldConfig{
				Type: graphql.String,
			},
			"fake": &graphql.FieldConfig{
				Type: fakeString,
			},
		},
	})
	_, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: queryType,
	})
	expectedError := `Schema must contain unique named types but contains multiple types named "String".`
	if err == nil || err.Error() != expectedError {
		t.Fatalf("Expected error: %v, got %v", expectedError, err)
	}
}