func TestPluralIdentifyingRootField_AllowsFetching(t *testing.T) {
	query := `{
      usernames(usernames:["dschafer", "leebyron", "schrockn"]) {
        username
        url
      }
    }`
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"usernames": []interface{}{
				map[string]interface{}{
					"username": "dschafer",
					"url":      "www.facebook.com/dschafer",
				},
				map[string]interface{}{
					"username": "leebyron",
					"url":      "www.facebook.com/leebyron",
				},
				map[string]interface{}{
					"username": "schrockn",
					"url":      "www.facebook.com/schrockn",
				},
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        pluralTestSchema,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

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 TestNodeInterfaceAndFields_AllowsRefetching_ReturnsNullForBadIDs(t *testing.T) {
	query := `{
        node(id: "5") {
          id
        }
      }`
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"node": nil,
		},
		Errors: []gqlerrors.FormattedError{
			{
				Message:   "Unknown node",
				Locations: []location.SourceLocation{},
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        nodeTestSchema,
		RequestString: query,
	})

	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

func TestObjectIdentification_TestFetching_CorrectlyRefetchesTheEmpire(t *testing.T) {
	query := `
        query EmpireRefetchQuery {
          node(id: "RmFjdGlvbjoy") {
            id
            ... on Faction {
              name
            }
          }
        }
      `
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"node": map[string]interface{}{
				"id":   "RmFjdGlvbjoy",
				"name": "Galactic Empire",
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        starwars.Schema,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

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 TestObjectIdentification_TestFetching_CorrectlyFetchesTheIDAndTheNameOfTheRebels(t *testing.T) {
	query := `
        query RebelsQuery {
          rebels {
            id
            name
          }
        }
      `
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"rebels": map[string]interface{}{
				"id":   "RmFjdGlvbjox",
				"name": "Alliance to Restore the Republic",
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        starwars.Schema,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

func TestPluralIdentifyingRootField_Configuration_ArgNames_WrongArgNameSpecified(t *testing.T) {

	t.Skipf("Pending `validator` implementation")
	query := `{
      usernames(usernamesMisspelled:["dschafer", "leebyron", "schrockn"]) {
        username
        url
      }
    }`
	expected := &graphql.Result{
		Data: nil,
		Errors: []gqlerrors.FormattedError{
			gqlerrors.FormattedError{
				Message: `Unknown argument "usernamesMisspelled" on field "usernames" of type "Query".`,
				Locations: []location.SourceLocation{
					location.SourceLocation{Line: 2, Column: 17},
				},
			},
			gqlerrors.FormattedError{
				Message: `Field "usernames" argument "usernames" of type "[String!]!" is required but not provided.`,
				Locations: []location.SourceLocation{
					location.SourceLocation{Line: 2, Column: 7},
				},
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        pluralTestSchema,
		RequestString: query,
	})
	pretty.Println(result)
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

// ServeHTTPC handles requests as a xhandler.HandlerC
func (h *Handler) ServeHTTPC(ctx context.Context, w http.ResponseWriter, r *http.Request) {
	var query string
	switch r.Method {
	case "GET":
		query = r.URL.Query().Get("query")
	case "POST":
		b, _ := ioutil.ReadAll(r.Body)
		r.Body.Close()
		if r.Header.Get("Content-Type") == "application/json" {
			q := map[string]interface{}{}
			if err := json.Unmarshal(b, &q); err != nil {
				http.Error(w, fmt.Sprintf("Cannot unmarshal JSON: %v", err), http.StatusBadRequest)
			}
			query, _ = q["query"].(string)
		} else {
			query = string(b)
		}
	default:
		http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
		return
	}
	result := graphql.Do(graphql.Params{
		Context:       ctx,
		RequestString: query,
		Schema:        h.schema,
	})
	if resource.Logger != nil {
		if len(result.Errors) > 0 {
			resource.Logger(ctx, resource.LogLevelError, fmt.Sprintf("wrong result, unexpected errors: %v", result.Errors), nil)
		}
	}
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(result)
}

func TestNodeInterfaceAndFields_AllowsRefetching_GetsTheCorrectWidthForPhotos(t *testing.T) {
	query := `{
        node(id: "4") {
          id
          ... on Photo {
            width
          }
        }
      }`
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"node": map[string]interface{}{
				"id":    "4",
				"width": 400,
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        nodeTestSchema,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

// Async mutation using channels
func TestMutation_WithClientMutationId_BehavesCorrectly_SupportsPromiseMutations(t *testing.T) {
	query := `
        mutation M {
          simplePromiseMutation(input: {clientMutationId: "abc"}) {
            result
            clientMutationId
          }
        }
      `
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"simplePromiseMutation": map[string]interface{}{
				"result":           1,
				"clientMutationId": "abc",
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        mutationTestSchema,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

// ContextHandler provides an entrypoint into executing graphQL queries with a
// user-provided context.
func (h *Handler) ContextHandler(ctx context.Context, w http.ResponseWriter, r *http.Request) {
	// get query
	opts := NewRequestOptions(r)

	// execute graphql query
	params := graphql.Params{
		Schema:         *h.Schema,
		RequestString:  opts.Query,
		VariableValues: opts.Variables,
		OperationName:  opts.OperationName,
		Context:        ctx,
	}
	result := graphql.Do(params)

	if h.pretty {
		w.WriteHeader(http.StatusOK)
		buff, _ := json.MarshalIndent(result, "", "\t")

		w.Write(buff)
	} else {
		w.WriteHeader(http.StatusOK)
		buff, _ := json.Marshal(result)

		w.Write(buff)
	}
}

func TestNodeInterfaceAndFields_AllowsRefetching_GetsTheCorrectNameForUsers(t *testing.T) {
	query := `{
        node(id: "1") {
          id
          ... on User {
            name
          }
        }
      }`
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"node": map[string]interface{}{
				"id":   "1",
				"name": "John Doe",
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        nodeTestSchema,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

func customHandler(schema *graphql.Schema) func(http.ResponseWriter, *http.Request) {
	return func(rw http.ResponseWriter, r *http.Request) {
		opts := handler.NewRequestOptions(r)

		rootValue := map[string]interface{}{
			"response": rw,
			"request":  r,
		}

		params := graphql.Params{
			Schema:         *schema,
			RequestString:  opts.Query,
			VariableValues: opts.Variables,
			OperationName:  opts.OperationName,
			RootObject:     rootValue,
		}

		result := graphql.Do(params)

		jsonStr, err := json.Marshal(result)

		if err != nil {
			panic(err)
		}

		rw.Header().Set("Content-Type", "application/json")

		rw.Header().Set("Access-Control-Allow-Credentials", "true")
		rw.Header().Set("Access-Control-Allow-Methods", "POST")
		rw.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
		rw.Header().Set("Access-Control-Allow-Origin", "http://localhost:8080")

		rw.Write(jsonStr)
	}
}

func TestMutateAndGetPayload_AddsErrors(t *testing.T) {
	query := `
        mutation M {
          simpleMutation(input: {clientMutationId: "abc"}) {
            result
            clientMutationId
          }
        }
      `
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"simpleMutation": interface{}(nil),
		},
		Errors: []gqlerrors.FormattedError{
			gqlerrors.FormattedError{
				Message:   NotFoundError.Error(),
				Locations: []location.SourceLocation{},
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        mutationTestSchemaError,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

func main() {
	// Save JSON of full schema introspection for Babel Relay Plugin to use
	result := graphql.Do(graphql.Params{
		Schema:        data.Schema,
		RequestString: testutil.IntrospectionQuery,
	})
	if result.HasErrors() {
		log.Fatalf("ERROR introspecting schema: %v", result.Errors)
		return
	} else {
		b, err := json.MarshalIndent(result, "", "  ")
		if err != nil {
			log.Fatalf("ERROR: %v", err)
		}
		err = ioutil.WriteFile("../data/schema.json", b, os.ModePerm)
		if err != nil {
			log.Fatalf("ERROR: %v", err)
		}

	}
	// TODO: Save user readable type system shorthand of schema
	// pending implementation of printSchema
	/*
		fs.writeFileSync(
		  path.join(__dirname, '../data/schema.graphql'),
		  printSchema(Schema)
		);
	*/
}

func TestGlobalIDFields_GivesDifferentIDs(t *testing.T) {
	query := `{
      allObjects {
        id
      }
    }`
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"allObjects": []interface{}{
				map[string]interface{}{
					"id": "VXNlcjox",
				},
				map[string]interface{}{
					"id": "VXNlcjoy",
				},
				map[string]interface{}{
					"id": "UGhvdG86MQ==",
				},
				map[string]interface{}{
					"id": "UGhvdG86Mg==",
				},
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        globalIDTestSchema,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

func TestConnection_TestFetching_CorrectlyFetchesNoShipsOfTheRebelsAtTheEndOfTheConnection(t *testing.T) {
	query := `
        query RebelsQuery {
          rebels {
            name,
            ships(first: 3 after: "YXJyYXljb25uZWN0aW9uOjQ=") {
              edges {
                cursor,
                node {
                  name
                }
              }
            }
          }
        }
      `
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"rebels": map[string]interface{}{
				"name": "Alliance to Restore the Republic",
				"ships": map[string]interface{}{
					"edges": []interface{}{},
				},
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        starwars.Schema,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

func TestGlobalIDFields_RefetchesTheIDs(t *testing.T) {
	query := `{
      user: node(id: "VXNlcjox") {
        id
        ... on User {
          name
        }
      },
      photo: node(id: "UGhvdG86MQ==") {
        id
        ... on Photo {
          width
        }
      }
    }`
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"user": map[string]interface{}{
				"id":   "VXNlcjox",
				"name": "John Doe",
			},
			"photo": map[string]interface{}{
				"id":    "UGhvdG86MQ==",
				"width": 300,
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        globalIDTestSchema,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

func TestObjectIdentification_TestFetching_CorrectlyRefetchesTheXWing(t *testing.T) {
	query := `
        query XWingRefetchQuery {
          node(id: "U2hpcDox") {
            id
            ... on Ship {
              name
            }
          }
        }
      `
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"node": map[string]interface{}{
				"id":   "U2hpcDox",
				"name": "X-Wing",
			},
		},
	}
	result := graphql.Do(graphql.Params{
		Schema:        starwars.Schema,
		RequestString: query,
	})
	if !reflect.DeepEqual(result, expected) {
		t.Fatalf("wrong result, graphql result diff: %v", testutil.Diff(expected, result))
	}
}

func TestExecutesResolveFunction_UsesProvidedResolveFunction(t *testing.T) {
	schema := testSchema(t, &graphql.Field{
		Type: graphql.String,
		Args: graphql.FieldConfigArgument{
			"aStr": &graphql.ArgumentConfig{Type: graphql.String},
			"aInt": &graphql.ArgumentConfig{Type: graphql.Int},
		},
		Resolve: func(p graphql.ResolveParams) (interface{}, error) {
			b, err := json.Marshal(p.Args)
			return string(b), err
		},
	})

	expected := map[string]interface{}{
		"test": "{}",
	}
	result := graphql.Do(graphql.Params{
		Schema:        schema,
		RequestString: `{ test }`,
	})
	if !reflect.DeepEqual(expected, result.Data) {
		t.Fatalf("Unexpected result, Diff: %v", testutil.Diff(expected, result.Data))
	}

	expected = map[string]interface{}{
		"test": `{"aStr":"String!"}`,
	}
	result = graphql.Do(graphql.Params{
		Schema:        schema,
		RequestString: `{ test(aStr: "String!") }`,
	})
	if !reflect.DeepEqual(expected, result.Data) {
		t.Fatalf("Unexpected result, Diff: %v", testutil.Diff(expected, result.Data))
	}

	expected = map[string]interface{}{
		"test": `{"aInt":-123,"aStr":"String!"}`,
	}
	result = graphql.Do(graphql.Params{
		Schema:        schema,
		RequestString: `{ test(aInt: -123, aStr: "String!") }`,
	})
	if !reflect.DeepEqual(expected, result.Data) {
		t.Fatalf("Unexpected result, Diff: %v", testutil.Diff(expected, result.Data))
	}
}