BINARY     := guenther
BUILD_DIR  := build
CMD        := ./cmd/pipeline/main.go
CONFIG     := configs/default.yaml

GO_IMAGE   := golang:bookworm
BUILD_TAGS := duckdb_arrow
LDFLAGS    := -s -w

GO_BUILD_FLAGS := -tags=$(BUILD_TAGS) -buildvcs=false -ldflags='$(LDFLAGS)'

# ── Targets ───────────────────────────────────────────────────────────────────

.PHONY: all build build-local test clean run help

all: build

## build: Build the binary inside a Docker container (no local toolchain needed)
build:
	@mkdir -p $(BUILD_DIR)
	docker run --rm \
		-v $(PWD):/app:Z \
		-w /app \
		$(GO_IMAGE) \
		sh -c "apt-get update -qq && \
		       apt-get install -y -qq gcc libc6-dev && \
		       CGO_ENABLED=1 go build $(GO_BUILD_FLAGS) -o $(BUILD_DIR)/$(BINARY) $(CMD) && \
		       echo BUILD_OK" \
		2>&1

## build-local: Build the binary using the local Go toolchain (requires gcc)
build-local:
	@mkdir -p $(BUILD_DIR)
	CGO_ENABLED=1 go build $(GO_BUILD_FLAGS) -o $(BUILD_DIR)/$(BINARY) $(CMD)

## test: Run all tests (requires local Go toolchain with gcc)
test:
	CGO_ENABLED=1 go test -v -tags=$(BUILD_TAGS) ./...

## run: Run the pipeline with the default config (binary must be built first)
run: $(BUILD_DIR)/$(BINARY)
	./$(BUILD_DIR)/$(BINARY) -config $(CONFIG)

## clean: Remove build artefacts
clean:
	rm -rf $(BUILD_DIR)

## help: Show this help message
help:
	@grep -E '^## ' $(MAKEFILE_LIST) | sed 's/^## /  /'