include $(PWD)/src/toolchain/Makefile

BACKEND_TF := $(wildcard infra/backend/*.tf)
ENVIRONMENT := production
REGION := sfo3
ROOT_DIR := $(shell pwd)
TERRAFORM := $(ROOT_DIR)/out/terraform

.DEFAULT_GOAL :=
.PHONY: default
default: \
	toolchain \
	apply

.PHONY:
clean:
	rm -rf $(CACHE_DIR)

.PHONY:
credentials: \
	$(CACHE_DIR)/secrets/credentials.tfvars

infra/backend/.terraform: \
	$(OUT_DIR)/terraform \
	$(BACKEND_TF)
	env -C infra/backend $(TERRAFORM) init

infra/main/.terraform: \
	$(OUT_DIR)/terraform \
	$(BACKEND_TF)
	env -C infra/main $(TERRAFORM) init \
		-backend-config="../../config/$(ENVIRONMENT).tfbackend"

infra/backend/$(ENVIRONMENT).tfstate: \
	$(CACHE_DIR)/secrets/credentials.tfvars \
	$(OUT_DIR)/terraform \
	infra/backend/.terraform
	env -C infra/backend $(TERRAFORM) apply \
		-var environment=$(ENVIRONMENT) \
		-var namespace=$(ENVIRONMENT) \
		-var region=$(REGION) \
		-state ../../$@ \
		-var-file ../../$<

config/$(ENVIRONMENT).tfbackend: \
	infra/backend/$(ENVIRONMENT).tfstate \
	$(OUT_DIR)/terraform
	env -C infra/backend $(TERRAFORM) \
		output -state ../../$< \
		> $@

.PHONY:
apply: \
	$(CACHE_DIR)/secrets/credentials.tfvars \
	$(OUT_DIR)/terraform \
	infra/main/.terraform
	env -C infra/main $(TERRAFORM) apply \
		-var-file ../../$<

$(CACHE_DIR)/secrets:
	mkdir -p $@

$(CACHE_DIR)/secrets/%.tfvars: secrets/%.tfvars.gpg $(CACHE_DIR)/secrets
	gpg --decrypt $< > $@

$(FETCH_DIR)/terraform:
	$(call git_clone,$@,$(TERRAFORM_REPO),$(TERRAFORM_REF))

$(OUT_DIR)/terraform: $(FETCH_DIR)/terraform
	$(call toolchain," \
		cd $(FETCH_DIR)/terraform && \
		export SSL_CERT_DIR=/etc/ssl/certs && \
		export CGO_ENABLED=0 && \
		export GOCACHE=/home/build/$(CACHE_DIR) && \
		export GOPATH=/home/build/$(CACHE_DIR) && \
		go build \
			-v \
			-trimpath \
			-ldflags='-w -extldflags=-static' \
			-o /home/build/$@ \
	")