#!/usr/bin/make -f

# Common variables
REPO ?= $(shell go list -m)
VERSION ?= $(shell git describe --tags --dirty --match "v*" --always --abbrev=8 2>/dev/null || cat VERSION 2>/dev/null || echo "develop")
GO_VERSION ?= 1.22
LINT_VERSION ?= 1.56.1
TRUECLOUDLAB_LINT_VERSION ?= 0.0.5
BINDIR = bin

METRICS_DUMP_OUT ?= ./metrics-dump.json

# Binaries to build
CMDS = $(addprefix frostfs-, $(notdir $(wildcard cmd/*)))
BINS = $(addprefix $(BINDIR)/, $(CMDS))

# Variables for docker
REPO_BASENAME = $(shell basename `go list -m`)
HUB_IMAGE ?= "truecloudlab/$(REPO_BASENAME)"
HUB_TAG ?= "$(shell echo ${VERSION} | sed 's/^v//')"

OUTPUT_LINT_DIR ?= $(shell pwd)/bin
LINT_DIR = $(OUTPUT_LINT_DIR)/golangci-lint-$(LINT_VERSION)-v$(TRUECLOUDLAB_LINT_VERSION)
TMP_DIR := .cache

# Variables for fuzzing
FUZZ_NGFUZZ_DIR ?= ""
FUZZ_TIMEOUT ?= 30
FUZZ_FUNCTIONS ?= "all"
FUZZ_AUX ?= ""

.PHONY: all $(BINS) $(BINDIR) dep docker/ test cover format image image-push dirty-image lint docker/lint pre-commit unpre-commit version clean protoc

# .deb package versioning
OS_RELEASE = $(shell lsb_release -cs)
PKG_VERSION ?= $(shell echo $(VERSION) | sed "s/^v//" | \
			sed -E "s/(.*)-(g[a-fA-F0-9]{6,8})(.*)/\1\3~\2/" | \
			sed "s/-/~/")-${OS_RELEASE}
.PHONY: debpackage debclean

# Make all binaries
all: $(BINS)

$(BINS): $(BINDIR) dep
	@echo "⇒ Build $@"
	CGO_ENABLED=0 \
	go build -v -trimpath \
	-ldflags "-X $(REPO)/internal/version.Version=$(VERSION)" \
	-o $@ ./cmd/$(subst frostfs-,,$(notdir $@))

$(BINDIR):
	@echo "⇒ Ensure dir: $@"
	@mkdir -p $@

# Pull go dependencies
dep:
	@printf "⇒ Download requirements: "
	@CGO_ENABLED=0 \
	go mod download && echo OK
	@printf "⇒ Tidy requirements: "
	@CGO_ENABLED=0 \
	go mod tidy -v && echo OK

# Run `make %` in Golang container, for more information run `make help.docker/%`
docker/%:
	$(if $(filter $*,all $(BINS)), \
		@echo "=> Running 'make $*' in clean Docker environment" && \
		docker run --rm -t \
		  -v `pwd`:/src \
		  -w /src \
		  -u `stat -c "%u:%g" .` \
		  --env HOME=/src \
		  golang:$(GO_VERSION) make $*,\
	  	@echo "supported docker targets: all $(BINS) lint")

# Run tests
test:
	@go test ./... -cover

# Run tests with race detection and produce coverage output
cover:
	@go test -v -race ./... -coverprofile=coverage.txt -covermode=atomic
	@go tool cover -html=coverage.txt -o coverage.html

# Run fuzzing
CLANG := $(shell which clang-17 2>/dev/null)
.PHONY: check-clang all
check-clang:
ifeq ($(CLANG),)
	@echo "clang-17 is not installed. Please install it before proceeding - https://apt.llvm.org/llvm.sh "
	@exit 1
endif

.PHONY: check-ngfuzz all
check-ngfuzz:
	@if [ -z "$(FUZZ_NGFUZZ_DIR)" ]; then \
		echo "Please set a variable FUZZ_NGFUZZ_DIR to specify path to the ngfuzz"; \
		exit 1; \
	fi

.PHONY: install-fuzzing-deps
install-fuzzing-deps: check-clang check-ngfuzz

.PHONY: fuzz
fuzz: install-fuzzing-deps  
	@START_PATH=$$(pwd); \
	ROOT_PATH=$$(realpath --relative-to=$(FUZZ_NGFUZZ_DIR) $$START_PATH) ; \
	cd $(FUZZ_NGFUZZ_DIR) && \
	./ngfuzz -clean && \
	./ngfuzz -fuzz $(FUZZ_FUNCTIONS) -rootdir $$ROOT_PATH -timeout $(FUZZ_TIMEOUT) $(FUZZ_AUX) && \
	./ngfuzz -report

# Reformat code
format:
	@echo "⇒ Processing gofmt check"
	@gofmt -s -w ./

# Build clean Docker image
image:
	@echo "⇒ Build FrostFS S3 Gateway docker image "
	@docker build \
		--build-arg REPO=$(REPO) \
		--build-arg VERSION=$(VERSION) \
		--rm \
		-f .docker/Dockerfile \
		-t $(HUB_IMAGE):$(HUB_TAG) .

# Push Docker image to the hub
image-push:
	@echo "⇒ Publish image"
	@docker push $(HUB_IMAGE):$(HUB_TAG)

# Build dirty Docker image
dirty-image:
	@echo "⇒ Build FrostFS S3 Gateway dirty docker image "
	@docker build \
		--build-arg REPO=$(REPO) \
		--build-arg VERSION=$(VERSION) \
		--rm \
		-f .docker/Dockerfile.dirty \
		-t $(HUB_IMAGE)-dirty:$(HUB_TAG) .

# Install linters
lint-install:
	@mkdir -p $(TMP_DIR)
	@rm -rf $(TMP_DIR)/linters
	@git -c advice.detachedHead=false clone --branch v$(TRUECLOUDLAB_LINT_VERSION) https://git.frostfs.info/TrueCloudLab/linters.git $(TMP_DIR)/linters
	@@make -C $(TMP_DIR)/linters lib CGO_ENABLED=1 OUT_DIR=$(OUTPUT_LINT_DIR)
	@rm -rf $(TMP_DIR)/linters
	@rmdir $(TMP_DIR) 2>/dev/null || true
	@CGO_ENABLED=1 GOBIN=$(LINT_DIR) go install github.com/golangci/golangci-lint/cmd/golangci-lint@v$(LINT_VERSION)

# Run linters
lint:
	@if [ ! -d "$(LINT_DIR)" ]; then \
		echo "Run make lint-install"; \
		exit 1; \
	fi
	$(LINT_DIR)/golangci-lint --timeout=5m run

# Run linters in Docker
docker/lint:
	docker run --rm -it \
	-v `pwd`:/src \
	-u `stat -c "%u:%g" .` \
	--env HOME=/src \
	golangci/golangci-lint:v$(LINT_VERSION) bash -c 'cd /src/ && make lint'

# Activate pre-commit hooks
pre-commit:
	pre-commit install -t pre-commit -t commit-msg

# Deactivate pre-commit hooks
unpre-commit:
	pre-commit uninstall -t pre-commit -t commit-msg

# Show current version
version:
	@echo $(VERSION)

# Clean up files
clean:
	rm -rf .cache
	rm -rf $(BINDIR)

# Generate code from .proto files
protoc:
	# Install specific version for protobuf lib
	@GOBIN=$(abspath $(BINDIR)) go install -mod=mod -v git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/protogen
	@for f in `find . -type f -name '*.proto' -not -path './vendor/*'`; do \
		echo "⇒ Processing $$f "; \
		protoc \
			--go_out=paths=source_relative:. \
            --plugin=protoc-gen-go-frostfs=$(BINDIR)/protogen \
            --go-frostfs_out=. --go-frostfs_opt=paths=source_relative \
            --go-grpc_opt=require_unimplemented_servers=false \
            --go-grpc_out=. --go-grpc_opt=paths=source_relative $$f; \
	done
	rm -rf vendor

# Package for Debian
debpackage:
	dch --package frostfs-s3-gw \
			--controlmaint \
			--newversion $(PKG_VERSION) \
			--distribution $(OS_RELEASE) \
			"Please see CHANGELOG.md for code changes for $(VERSION)"
	dpkg-buildpackage --no-sign -b

debclean:
	dh clean

# Dump metrics (use METRICS_DUMP_OUT variable to override default out file './metrics-dump.json')
.PHONY: dump-metrics
dump-metrics:
	@go test ./metrics -run TestDescribeAll --tags=dump_metrics --out=$(abspath $(METRICS_DUMP_OUT))

include help.mk