.PHONY: statusgo statusd-prune all test clean help
.PHONY: statusgo-android statusgo-ios

# Clear any GOROOT set outside of the Nix shell
export GOROOT=

# This is a code for automatic help generator.
# It supports ANSI colors and categories.
# To add new item into help output, simply add comments
# starting with '##'. To add category, use @category.
GREEN  := $(shell echo "\e[32m")
WHITE  := $(shell echo "\e[37m")
YELLOW := $(shell echo "\e[33m")
RESET  := $(shell echo "\e[0m")
HELP_FUN = \
		   %help; \
		   while(<>) { push @{$$help{$$2 // 'options'}}, [$$1, $$3] if /^([a-zA-Z0-9\-]+)\s*:.*\#\#(?:@([a-zA-Z\-]+))?\s(.*)$$/ }; \
		   print "Usage: make [target]\n\n"; \
		   for (sort keys %help) { \
			   print "${WHITE}$$_:${RESET}\n"; \
			   for (@{$$help{$$_}}) { \
				   $$sep = " " x (32 - length $$_->[0]); \
				   print "  ${YELLOW}$$_->[0]${RESET}$$sep${GREEN}$$_->[1]${RESET}\n"; \
			   }; \
			   print "\n"; \
		   }

help: SHELL := /bin/sh
help: ##@other Show this help
	@perl -e '$(HELP_FUN)' $(MAKEFILE_LIST)

RELEASE_TAG:=$(shell ./_assets/scripts/version.sh)
RELEASE_DIR := /tmp/release-$(RELEASE_TAG)
GOLANGCI_BINARY=golangci-lint
IPFS_GATEWAY_URL ?= https://ipfs.status.im/

ifeq ($(OS),Windows_NT)     # is Windows_NT on XP, 2000, 7, Vista, 10...
 detected_OS := Windows
else
 detected_OS := $(strip $(shell uname))
endif

ifeq ($(detected_OS),Darwin)
 GOBIN_SHARED_LIB_EXT := dylib
 GOBIN_SHARED_LIB_CFLAGS := CGO_ENABLED=1 GOOS=darwin
else ifeq ($(detected_OS),Windows)
 GOBIN_SHARED_LIB_EXT := dll
 GOBIN_SHARED_LIB_CGO_LDFLAGS := CGO_LDFLAGS=""
else
 GOBIN_SHARED_LIB_EXT := so
 GOBIN_SHARED_LIB_CGO_LDFLAGS := CGO_LDFLAGS="-Wl,-soname,libstatus.so.0"
endif

CGO_CFLAGS = -I/$(JAVA_HOME)/include -I/$(JAVA_HOME)/include/darwin
export GOPATH ?= $(HOME)/go

GIT_ROOT := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
GIT_COMMIT := $(shell git rev-parse --short HEAD)
GIT_AUTHOR := $(shell git config user.email || echo $$USER)

ENABLE_METRICS ?= true
BUILD_TAGS ?= gowaku_no_rln

BUILD_FLAGS ?= -ldflags="-X github.com/status-im/status-go/params.Version=$(RELEASE_TAG:v%=%) \
	-X github.com/status-im/status-go/params.GitCommit=$(GIT_COMMIT) \
	-X github.com/status-im/status-go/params.IpfsGatewayURL=$(IPFS_GATEWAY_URL) \
	-X github.com/status-im/status-go/vendor/github.com/ethereum/go-ethereum/metrics.EnabledStr=$(ENABLE_METRICS)"

BUILD_FLAGS_MOBILE ?= -ldflags="-X github.com/status-im/status-go/params.Version=$(RELEASE_TAG:v%=%) \
	-X github.com/status-im/status-go/params.GitCommit=$(GIT_COMMIT) \
	-X github.com/status-im/status-go/params.IpfsGatewayURL=$(IPFS_GATEWAY_URL)"

networkid ?= StatusChain

DOCKER_IMAGE_NAME ?= statusteam/status-go
BOOTNODE_IMAGE_NAME ?= statusteam/bootnode
STATUSD_PRUNE_IMAGE_NAME ?= statusteam/statusd-prune

DOCKER_IMAGE_CUSTOM_TAG ?= $(RELEASE_TAG)

DOCKER_TEST_WORKDIR = /go/src/github.com/status-im/status-go/
DOCKER_TEST_IMAGE = golang:1.13

GO_CMD_PATHS := $(filter-out library, $(wildcard cmd/*))
GO_CMD_NAMES := $(notdir $(GO_CMD_PATHS))
GO_CMD_BUILDS := $(addprefix build/bin/, $(GO_CMD_NAMES))

# Our custom config is located in nix/nix.conf
export NIX_USER_CONF_FILES = $(PWD)/nix/nix.conf
# Location of symlinks to derivations that should not be garbage collected
export _NIX_GCROOTS = ./.nix-gcroots

#----------------
# Nix targets
#----------------

# Use $(call sh, <COMMAND>) instead of $(shell <COMMAND>) to avoid
# invoking a Nix shell when normal shell will suffice, it's faster.
# This works because it's defined before we set SHELL to Nix one.
define sh
$(shell $(1))
endef

# TODO: Define more specific shells.
TARGET := default
ifneq ($(detected_OS),Windows)
 SHELL := ./nix/scripts/shell.sh
endif
shell: export TARGET ?= default
shell: ##@prepare Enter into a pre-configured shell
ifndef IN_NIX_SHELL
	@ENTER_NIX_SHELL
else
	@echo "${YELLOW}Nix shell is already active$(RESET)"
endif

nix-repl: SHELL := /bin/sh
nix-repl: ##@nix Start an interactive Nix REPL
	nix repl shell.nix

nix-gc-protected: SHELL := /bin/sh
nix-gc-protected:
	@echo -e "$(YELLOW)The following paths are protected:$(RESET)" && \
	ls -1 $(_NIX_GCROOTS) | sed 's/^/ - /'


nix-upgrade: SHELL := /bin/sh
nix-upgrade: ##@nix Upgrade Nix interpreter to current version.
	nix/scripts/upgrade.sh

nix-gc: nix-gc-protected ##@nix Garbage collect all packages older than 20 days from /nix/store
	nix-store --gc

nix-clean: ##@nix Remove all status-mobile build artifacts from /nix/store
	nix/scripts/clean.sh

nix-purge: SHELL := /bin/sh
nix-purge: ##@nix Completely remove Nix setup, including /nix directory
	nix/scripts/purge.sh

#----------------
# General targets
#----------------
all: $(GO_CMD_NAMES)

.PHONY: $(GO_CMD_NAMES) $(GO_CMD_PATHS) $(GO_CMD_BUILDS)
$(GO_CMD_BUILDS): ##@build Build any Go project from cmd folder
	go build -mod=vendor -v \
		-tags '$(BUILD_TAGS)' $(BUILD_FLAGS) \
		-o ./$@ ./cmd/$(notdir $@) ;\
	echo "Compilation done." ;\
	echo "Run \"build/bin/$(notdir $@) -h\" to view available commands."

bootnode: ##@build Build discovery v5 bootnode using status-go deps
bootnode: build/bin/bootnode

node-canary: ##@build Build P2P node canary using status-go deps
node-canary: build/bin/node-canary

statusgo: ##@build Build status-go as statusd server
statusgo: build/bin/statusd
statusd: statusgo

statusd-prune: ##@statusd-prune Build statusd-prune
statusd-prune: build/bin/statusd-prune

spiff-workflow: ##@build Build node for SpiffWorkflow BPMN software
spiff-workflow: build/bin/spiff-workflow

status-cli: ##@build Build status-cli to send messages
status-cli: build/bin/status-cli

statusd-prune-docker-image: SHELL := /bin/sh
statusd-prune-docker-image: ##@statusd-prune Build statusd-prune docker image
	@echo "Building docker image for ststusd-prune..."
	docker build --file _assets/build/Dockerfile-prune . \
		--label "commit=$(GIT_COMMIT)" \
		--label "author=$(GIT_AUTHOR)" \
		-t $(BOOTNODE_IMAGE_NAME):$(DOCKER_IMAGE_CUSTOM_TAG) \
		-t $(STATUSD_PRUNE_IMAGE_NAME):latest

statusgo-cross: statusgo-android statusgo-ios
	@echo "Full cross compilation done."
	@ls -ld build/bin/statusgo-*

statusgo-android: ##@cross-compile Build status-go for Android
	@echo "Building status-go for Android..."
	export GO111MODULE=off; \
	gomobile init; \
	gomobile bind -v \
		-target=android -ldflags="-s -w" \
		-tags '$(BUILD_TAGS) disable_torrent' \
		$(BUILD_FLAGS_MOBILE) \
		-o build/bin/statusgo.aar \
		github.com/status-im/status-go/mobile
	@echo "Android cross compilation done in build/bin/statusgo.aar"

statusgo-ios: ##@cross-compile Build status-go for iOS
	@echo "Building status-go for iOS..."
	export GO111MODULE=off; \
	gomobile init; \
	gomobile bind -v \
		-target=ios -ldflags="-s -w" \
		-tags 'nowatchdog $(BUILD_TAGS) disable_torrent' \
		$(BUILD_FLAGS_MOBILE) \
		-o build/bin/Statusgo.xcframework \
		github.com/status-im/status-go/mobile
	@echo "iOS framework cross compilation done in build/bin/Statusgo.xcframework"

statusgo-library: ##@cross-compile Build status-go as static library for current platform
	## cmd/library/README.md explains the magic incantation behind this
	mkdir -p build/bin/statusgo-lib
	go run cmd/library/*.go > build/bin/statusgo-lib/main.go
	@echo "Building static library..."
	go build \
		-tags '$(BUILD_TAGS)' \
		$(BUILD_FLAGS) \
		-buildmode=c-archive \
		-o build/bin/libstatus.a \
		./build/bin/statusgo-lib
	@echo "Static library built:"
	@ls -la build/bin/libstatus.*

statusgo-shared-library: ##@cross-compile Build status-go as shared library for current platform
	## cmd/library/README.md explains the magic incantation behind this
	mkdir -p build/bin/statusgo-lib
	go run cmd/library/*.go > build/bin/statusgo-lib/main.go
	@echo "Building shared library..."
	@echo "Tags: $(BUILD_TAGS)"
	$(GOBIN_SHARED_LIB_CFLAGS) $(GOBIN_SHARED_LIB_CGO_LDFLAGS) go build \
		-tags '$(BUILD_TAGS)' \
		$(BUILD_FLAGS) \
		-buildmode=c-shared \
		-o build/bin/libstatus.$(GOBIN_SHARED_LIB_EXT) \
		./build/bin/statusgo-lib
ifeq ($(detected_OS),Linux)
	cd build/bin && \
	ls -lah . && \
	mv ./libstatus.$(GOBIN_SHARED_LIB_EXT) ./libstatus.$(GOBIN_SHARED_LIB_EXT).0 && \
	ln -s ./libstatus.$(GOBIN_SHARED_LIB_EXT).0 ./libstatus.$(GOBIN_SHARED_LIB_EXT)
endif
	@echo "Shared library built:"
	@ls -la build/bin/libstatus.*

docker-image: SHELL := /bin/sh
docker-image: BUILD_TARGET ?= statusd
docker-image: ##@docker Build docker image (use DOCKER_IMAGE_NAME to set the image name)
	@echo "Building docker image..."
	docker build --file _assets/build/Dockerfile . \
		--build-arg 'build_tags=$(BUILD_TAGS)' \
		--build-arg 'build_flags=$(BUILD_FLAGS)' \
		--build-arg 'build_target=$(BUILD_TARGET)' \
		--label 'commit=$(GIT_COMMIT)' \
		--label 'author=$(GIT_AUTHOR)' \
		-t $(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_CUSTOM_TAG) \
		-t $(DOCKER_IMAGE_NAME):latest

bootnode-image: SHELL := /bin/sh
bootnode-image:
	@echo "Building docker image for bootnode..."
	docker build --file _assets/build/Dockerfile-bootnode . \
		--build-arg 'build_tags=$(BUILD_TAGS)' \
		--build-arg 'build_flags=$(BUILD_FLAGS)' \
		--label 'commit=$(GIT_COMMIT)' \
		--label 'author=$(GIT_AUTHOR)' \
		-t $(BOOTNODE_IMAGE_NAME):$(DOCKER_IMAGE_CUSTOM_TAG) \
		-t $(BOOTNODE_IMAGE_NAME):latest

push-docker-images: SHELL := /bin/sh
push-docker-images: docker-image bootnode-image
	docker push $(BOOTNODE_IMAGE_NAME):$(DOCKER_IMAGE_CUSTOM_TAG)
	docker push $(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_CUSTOM_TAG)

clean-docker-images: SHELL := /bin/sh
clean-docker-images:
	docker rmi -f $$(docker image ls --filter="reference=$(DOCKER_IMAGE_NAME)" --quiet)

# See https://www.gnu.org/software/make/manual/html_node/Target_002dspecific.html to understand this magic.
push-docker-images-latest: SHELL := /bin/sh
push-docker-images-latest: GIT_BRANCH = $(shell git rev-parse --abbrev-ref HEAD)
push-docker-images-latest: GIT_LOCAL  = $(shell git rev-parse @)
push-docker-images-latest: GIT_REMOTE = $(shell git fetch -q && git rev-parse remotes/origin/develop || echo 'NO_DEVELOP')
push-docker-images-latest:
	echo $(GIT_BRANCH)
	echo $(GIT_LOCAL)
	echo $(GIT_REMOTE)
	@echo "Pushing latest docker images..."
	@echo "Checking git branch..."
ifneq ("$(GIT_BRANCH)", "develop")
	$(error You should only use develop branch to push the latest tag!)
	exit 1
endif
ifneq ("$(GIT_LOCAL)", "$(GIT_REMOTE)")
	$(error The local git commit does not match the remote origin!)
	exit 1
endif
	docker push $(BOOTNODE_IMAGE_NAME):$(DOCKER_IMAGE_CUSTOM_TAG)
	docker push $(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_CUSTOM_TAG)

setup: ##@setup Install all tools
setup: setup-dev

setup-dev: ##@setup Install all necessary tools for development
setup-dev:
	echo "Replaced by Nix shell. Use 'make shell' or just any target as-is."

generate-handlers:
	go generate ./_assets/generate_handlers/
generate: ##@other Regenerate assets and other auto-generated stuff
	go generate ./static ./static/mailserver_db_migrations ./t ./multiaccounts/... ./appdatabase/... ./protocol/... ./walletdatabase/... ./_assets/generate_handlers

generate-appdatabase:
	go generate ./appdatabase/...

prepare-release: clean-release
	mkdir -p $(RELEASE_DIR)
	mv build/bin/statusgo.aar $(RELEASE_DIR)/status-go-android.aar
	zip -r build/bin/Statusgo.xcframework.zip build/bin/Statusgo.xcframework
	mv build/bin/Statusgo.xcframework.zip $(RELEASE_DIR)/status-go-ios.zip
	zip -r $(RELEASE_DIR)/status-go-desktop.zip . -x *.git*
	${MAKE} clean

clean-release:
	rm -rf $(RELEASE_DIR)

lint-fix:
	find . \
		-name '*.go' \
		-and -not -name '*.pb.go' \
		-and -not -name 'bindata*' \
		-and -not -name 'migrations.go' \
		-and -not -name 'messenger_handlers.go' \
		-and -not -wholename '*/vendor/*' \
		-exec goimports \
		-local 'github.com/ethereum/go-ethereum,github.com/status-im/status-go,github.com/status-im/markdown' \
		-w {} \;
	$(MAKE) vendor

mock: ##@other Regenerate mocks
	mockgen -package=fake         -destination=transactions/fake/mock.go             -source=transactions/fake/txservice.go
	mockgen -package=status       -destination=services/status/account_mock.go       -source=services/status/service.go
	mockgen -package=peer         -destination=services/peer/discoverer_mock.go      -source=services/peer/service.go
	mockgen -package=mock_transactor -destination=transactions/mock_transactor/transactor.go   -source=transactions/transactor.go
	mockgen -package=mock_pathprocessor     -destination=services/wallet/router/pathprocessor/mock_pathprocessor/processor.go -source=services/wallet/router/pathprocessor/processor.go
	mockgen -package=mock_bridge     -destination=services/wallet/bridge/mock_bridge/bridge.go -source=services/wallet/bridge/bridge.go
	mockgen -package=mock_client     -destination=rpc/chain/mock/client/client.go              -source=rpc/chain/client.go
	mockgen -package=mock_token      -destination=services/wallet/token/mock/token/tokenmanager.go -source=services/wallet/token/token.go
	mockgen -package=mock_thirdparty -destination=services/wallet/thirdparty/mock/types.go -source=services/wallet/thirdparty/types.go
	mockgen -package=mock_balance_persistence -destination=services/wallet/token/mock/balance_persistence/balance_persistence.go -source=services/wallet/token/balance_persistence.go
	mockgen -package=mock_network      -destination=rpc/network/mock/network.go -source=rpc/network/network.go
	mockgen -package=mock_rpcclient     -destination=rpc/mock/client/client.go              -source=rpc/client.go
	mockgen -package=mock_collectibles -destination=services/wallet/collectibles/mock/collection_data_db.go -source=services/wallet/collectibles/collection_data_db.go
	mockgen -package=mock_collectibles -destination=services/wallet/collectibles/mock/collectible_data_db.go -source=services/wallet/collectibles/collectible_data_db.go
	mockgen -package=mock_thirdparty -destination=services/wallet/thirdparty/mock/collectible_types.go -source=services/wallet/thirdparty/collectible_types.go
	mockgen -package=mock_paraswap -destination=services/wallet/thirdparty/paraswap/mock/types.go -source=services/wallet/thirdparty/paraswap/types.go
	mockgen -package=mock_onramp -destination=services/wallet/onramp/mock/types.go -source=services/wallet/onramp/types.go

docker-test: ##@tests Run tests in a docker container with golang.
	docker run --privileged --rm -it -v "$(PWD):$(DOCKER_TEST_WORKDIR)" -w "$(DOCKER_TEST_WORKDIR)" $(DOCKER_TEST_IMAGE) go test ${ARGS}

test: test-unit ##@tests Run basic, short tests during development

test-unit: export BUILD_TAGS ?=
test-unit: export UNIT_TEST_DRY_RUN ?= false
test-unit: export UNIT_TEST_COUNT ?= 1
test-unit: export UNIT_TEST_FAILFAST ?= true
test-unit: export UNIT_TEST_RERUN_FAILS ?= true
test-unit: export UNIT_TEST_USE_DEVELOPMENT_LOGGER ?= true
test-unit: export UNIT_TEST_REPORT_CODECLIMATE ?= false
test-unit: export UNIT_TEST_REPORT_CODECOV ?= false
test-unit: export UNIT_TEST_PACKAGES ?= $(call sh, go list ./... | \
	grep -v /vendor | \
	grep -v /t/e2e | \
	grep -v /t/benchmarks | \
	grep -v /transactions/fake)
test-unit: ##@tests Run unit and integration tests
	./_assets/scripts/run_unit_tests.sh

test-unit-race: export GOTEST_EXTRAFLAGS=-race
test-unit-race: test-unit ##@tests Run unit and integration tests with -race flag

test-e2e: ##@tests Run e2e tests
	# order: reliability then alphabetical
	# TODO(tiabc): make a single command out of them adding `-p 1` flag.

test-e2e-race: export GOTEST_EXTRAFLAGS=-race
test-e2e-race: test-e2e ##@tests Run e2e tests with -race flag

canary-test: node-canary
	# TODO: uncomment that!
	#_assets/scripts/canary_test_mailservers.sh ./config/cli/fleet-eth.prod.json

lint:
	golangci-lint run ./...

ci: lint canary-test test-unit test-e2e ##@tests Run all linters and tests at once

ci-race: lint canary-test test-unit test-e2e-race ##@tests Run all linters and tests at once + race

clean: ##@other Cleanup
	rm -fr build/bin/* mailserver-config.json

git-clean:
	git clean -xf

deep-clean: clean git-clean
	rm -Rdf .ethereumtest/StatusChain

tidy:
	go mod tidy

vendor:
	go mod tidy
	go mod vendor
	modvendor -copy="**/*.c **/*.h" -v
.PHONY: vendor

update-fleet-config: ##@other Update fleets configuration from fleets.status.im
	./_assets/scripts/update-fleet-config.sh
	@echo "Updating static assets..."
	@go generate ./static
	@echo "Done"

run-bootnode-systemd: ##@Easy way to run a bootnode locally with Docker Compose
	@cd _assets/systemd/bootnode && $(MAKE)

run-bootnode-docker: ##@Easy way to run a bootnode locally with Docker Compose
	@cd _assets/compose/bootnode && $(MAKE)

run-mailserver-systemd: ##@Easy Run a mailserver locally with systemd
	@cd _assets/systemd/mailserver && $(MAKE)

run-mailserver-docker: ##@Easy Run a mailserver locally with Docker Compose
	@cd _assets/compose/mailserver && $(MAKE)

clean-bootnode-systemd: ##@Easy Clean your systemd service for running a bootnode
	@cd _assets/systemd/bootnode && $(MAKE) clean

clean-bootnode-docker: ##@Easy Clean your Docker container running a bootnode
	@cd _assets/compose/bootnode && $(MAKE) clean

clean-mailserver-systemd: ##@Easy Clean your systemd service for running a mailserver
	@cd _assets/systemd/mailserver && $(MAKE) clean

clean-mailserver-docker: ##@Easy Clean your Docker container running a mailserver
	@cd _assets/compose/mailserver && $(MAKE) clean

migration: DEFAULT_MIGRATION_PATH := appdatabase/migrations/sql
migration:
	touch $(DEFAULT_MIGRATION_PATH)/$$(date '+%s')_$(D).up.sql

migration-check:
	bash _assets/scripts/migration_check.sh

commit-check: SHELL := /bin/sh
commit-check:
	@bash _assets/scripts/commit_check.sh

version: SHELL := /bin/sh
version:
	@./_assets/scripts/version.sh

tag-version:
	bash _assets/scripts/tag_version.sh $(TARGET_COMMIT)

migration-wallet: DEFAULT_WALLET_MIGRATION_PATH := walletdatabase/migrations/sql
migration-wallet:
	touch $(DEFAULT_WALLET_MIGRATION_PATH)/$$(date +%s)_$(D).up.sql

install-git-hooks: SHELL := /bin/sh
install-git-hooks:
	@ln -sf $(if $(filter $(detected_OS), Linux),-r,) \
		$(GIT_ROOT)/_assets/hooks/* $(GIT_ROOT)/.git/hooks

-include install-git-hooks
.PHONY: install-git-hooks

migration-protocol: DEFAULT_PROTOCOL_PATH := protocol/migrations/sqlite
migration-protocol:
	touch $(DEFAULT_PROTOCOL_PATH)/$$(date +%s)_$(D).up.sql

PROXY_WRAPPER_PATH = $(CURDIR)/vendor/github.com/siphiuel/lc-proxy-wrapper
-include $(PROXY_WRAPPER_PATH)/Makefile.vars

#export VERIF_PROXY_OUT_PATH = $(CURDIR)/vendor/github.com/siphiuel/lc-proxy-wrapper
build-verif-proxy:
	$(MAKE) -C $(NIMBUS_ETH1_PATH) libverifproxy

build-verif-proxy-wrapper:
	$(MAKE) -C $(VERIF_PROXY_OUT_PATH) build-verif-proxy-wrapper

test-verif-proxy-wrapper:
	CGO_CFLAGS="$(CGO_CFLAGS)" go test -v github.com/status-im/status-go/rpc -tags gowaku_skip_migrations,nimbus_light_client -run ^TestProxySuite$$ -testify.m TestRun -ldflags $(LDFLAGS)


run-integration-tests: SHELL := /bin/sh
run-integration-tests: export INTEGRATION_TESTS_DOCKER_UID ?= $(shell id -u $$USER)
run-integration-tests:
	docker-compose -f integration-tests/docker-compose.anvil.yml -f integration-tests/docker-compose.test.status-go.yml up -d --build --remove-orphans; \
	docker-compose -f integration-tests/docker-compose.anvil.yml -f integration-tests/docker-compose.test.status-go.yml logs -f tests-rpc; \
	exit_code=$$(docker inspect integration-tests_tests-rpc_1 -f '{{.State.ExitCode}}'); \
	docker-compose -f integration-tests/docker-compose.anvil.yml -f integration-tests/docker-compose.test.status-go.yml down; \
	exit $$exit_code

run-anvil: SHELL := /bin/sh
run-anvil:
	docker-compose -f integration-tests/docker-compose.anvil.yml up --remove-orphans

codecov-validate:
	curl -X POST --data-binary @.codecov.yml https://codecov.io/validate