.DEFAULT_GOAL := help
SHELL := /bin/bash
DATE = $(shell date +%Y-%m-%d:%H:%M:%S)

APP_VERSION_FILE = app/version.py

GIT_BRANCH ?= $(shell git symbolic-ref --short HEAD 2> /dev/null || echo "detached")
GIT_COMMIT ?= $(shell git rev-parse HEAD)

DOCKER_BUILDER_IMAGE_NAME = govuk/notify-api-builder:master

BUILD_TAG ?= notifications-api-manual
BUILD_NUMBER ?= 0
DEPLOY_BUILD_NUMBER ?= ${BUILD_NUMBER}
BUILD_URL ?=

DOCKER_CONTAINER_PREFIX = ${USER}-${BUILD_TAG}

CF_API ?= api.cloud.service.gov.uk
CF_ORG ?= govuk-notify
CF_SPACE ?= ${DEPLOY_ENV}
CF_HOME ?= ${HOME}
$(eval export CF_HOME)

CF_MANIFEST_PATH ?= /tmp/manifest.yml


NOTIFY_CREDENTIALS ?= ~/.notify-credentials


## DEVELOPMENT

.PHONY: help
help:
	@cat $(MAKEFILE_LIST) | grep -E '^[a-zA-Z_-]+:.*?## .*$$' | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'

.PHONY: generate-version-file
generate-version-file: ## Generates the app version file
	@echo -e "__git_commit__ = \"${GIT_COMMIT}\"\n__time__ = \"${DATE}\"" > ${APP_VERSION_FILE}

.PHONY: test
test: generate-version-file ## Run tests
	./scripts/run_tests.sh

.PHONY: freeze-requirements
freeze-requirements: ## Pin all requirements including sub dependencies into requirements.txt
	rm -rf venv-freeze
	virtualenv -p python3 venv-freeze
	$$(pwd)/venv-freeze/bin/pip install -r requirements-app.txt
	echo '# pyup: ignore file' > requirements.txt
	echo '# This file is autogenerated. Do not edit it manually.' >> requirements.txt
	cat requirements-app.txt >> requirements.txt
	echo '' >> requirements.txt
	$$(pwd)/venv-freeze/bin/pip freeze -r <(sed '/^--/d' requirements-app.txt) | sed -n '/The following requirements were added by pip freeze/,$$p' >> requirements.txt
	rm -rf venv-freeze

.PHONY: test-requirements
test-requirements:
	@diff requirements-app.txt requirements.txt | grep '<' \
	    && { echo "requirements.txt doesn't match requirements-app.txt."; \
	         echo "Run 'make freeze-requirements' to update."; exit 1; } \
|| { echo "requirements.txt is up to date"; exit 0; }

.PHONY: prepare-docker-build-image
prepare-docker-build-image: generate-version-file ## Prepare the Docker builder image
	docker build -f docker/Dockerfile \
		--build-arg HTTP_PROXY="${HTTP_PROXY}" \
		--build-arg HTTPS_PROXY="${HTTP_PROXY}" \
		--build-arg NO_PROXY="${NO_PROXY}" \
		-t ${DOCKER_BUILDER_IMAGE_NAME} \
		.

.PHONY: test-with-docker
test-with-docker: prepare-docker-build-image create-docker-test-db ## Run tests inside a Docker container
	@docker run -it --rm \
		--name "${DOCKER_CONTAINER_PREFIX}-test" \
		--link "${DOCKER_CONTAINER_PREFIX}-db:postgres" \
		-e SQLALCHEMY_DATABASE_URI=postgresql://postgres:postgres@postgres/test_notification_api \
		-e GIT_COMMIT=${GIT_COMMIT} \
		-e BUILD_NUMBER=${BUILD_NUMBER} \
		-e BUILD_URL=${BUILD_URL} \
		-e http_proxy="${HTTP_PROXY}" \
		-e HTTP_PROXY="${HTTP_PROXY}" \
		-e https_proxy="${HTTPS_PROXY}" \
		-e HTTPS_PROXY="${HTTPS_PROXY}" \
		-e NO_PROXY="${NO_PROXY}" \
		${DOCKER_BUILDER_IMAGE_NAME} \
		make test

.PHONY: create-docker-test-db
create-docker-test-db: ## Start the test database in a Docker container
	docker rm -f ${DOCKER_CONTAINER_PREFIX}-db 2> /dev/null || true
	@docker run -d \
		--name "${DOCKER_CONTAINER_PREFIX}-db" \
		-e POSTGRES_PASSWORD="postgres" \
		-e POSTGRES_DB=test_notification_api \
		postgres:9.5
	sleep 3

.PHONY: clean-docker-containers
clean-docker-containers: ## Clean up any remaining docker containers
	docker rm -f $(shell docker ps -q -f "name=${DOCKER_CONTAINER_PREFIX}") 2> /dev/null || true

.PHONY: clean
clean:
	rm -rf node_modules cache target venv .coverage build tests/.cache ${CF_MANIFEST_PATH}


## DEPLOYMENT

.PHONY: preview
preview: ## Set environment to preview
	$(eval export DEPLOY_ENV=preview)
	$(eval export DNS_NAME="notify.works")
	@true

.PHONY: staging
staging: ## Set environment to staging
	$(eval export DEPLOY_ENV=staging)
	$(eval export DNS_NAME="staging-notify.works")
	@true

.PHONY: production
production: ## Set environment to production
	$(eval export DEPLOY_ENV=production)
	$(eval export DNS_NAME="notifications.service.gov.uk")
	@true

.PHONY: cf-login
cf-login: ## Log in to Cloud Foundry
	$(if ${CF_USERNAME},,$(error Must specify CF_USERNAME))
	$(if ${CF_PASSWORD},,$(error Must specify CF_PASSWORD))
	$(if ${CF_SPACE},,$(error Must specify CF_SPACE))
	@echo "Logging in to Cloud Foundry on ${CF_API}"
	@cf login -a "${CF_API}" -u ${CF_USERNAME} -p "${CF_PASSWORD}" -o "${CF_ORG}" -s "${CF_SPACE}"

.PHONY: generate-manifest
generate-manifest:
	$(if ${CF_APP},,$(error Must specify CF_APP))
	$(if ${CF_SPACE},,$(error Must specify CF_SPACE))
	$(if $(shell which gpg2), $(eval export GPG=gpg2), $(eval export GPG=gpg))
	$(if ${GPG_PASSPHRASE_TXT}, $(eval export DECRYPT_CMD=echo -n $$$${GPG_PASSPHRASE_TXT} | ${GPG} --quiet --batch --passphrase-fd 0 --pinentry-mode loopback -d), $(eval export DECRYPT_CMD=${GPG} --quiet --batch -d))

	@jinja2 --strict manifest.yml.j2 \
	    -D environment=${CF_SPACE} \
	    -D CF_APP=${CF_APP} \
	    --format=yaml \
	    <(${DECRYPT_CMD} ${NOTIFY_CREDENTIALS}/credentials/${CF_SPACE}/paas/environment-variables.gpg) 2>&1

.PHONY: cf-deploy
cf-deploy: ## Deploys the app to Cloud Foundry
	$(if ${CF_SPACE},,$(error Must specify CF_SPACE))
	$(if ${CF_APP},,$(error Must specify CF_APP))
	cf target -o ${CF_ORG} -s ${CF_SPACE}
	@cf app --guid ${CF_APP} || exit 1

	# cancel any existing deploys to ensure we can apply manifest (if a deploy is in progress you'll see ScaleDisabledDuringDeployment)
	cf cancel-deployment ${CF_APP} || true

	# generate manifest (including secrets) and write it to CF_MANIFEST_PATH (in /tmp/)
	make -s CF_APP=${CF_APP} generate-manifest > ${CF_MANIFEST_PATH}

	# fails after 15 mins if deploy doesn't work
	# reads manifest from CF_MANIFEST_PATH
	CF_STARTUP_TIMEOUT=15 cf push ${CF_APP} --strategy=rolling -f ${CF_MANIFEST_PATH}
	# delete old manifest file
	rm ${CF_MANIFEST_PATH}

.PHONY: cf-deploy-api-db-migration
cf-deploy-api-db-migration:
	$(if ${CF_SPACE},,$(error Must specify CF_SPACE))
	cf target -o ${CF_ORG} -s ${CF_SPACE}
	make -s CF_APP=notify-api-db-migration generate-manifest > ${CF_MANIFEST_PATH}

	cf push notify-api-db-migration --no-route -f ${CF_MANIFEST_PATH}
	rm ${CF_MANIFEST_PATH}

	cf run-task notify-api-db-migration --command="flask db upgrade" --name api_db_migration

.PHONY: cf-check-api-db-migration-task
cf-check-api-db-migration-task: ## Get the status for the last notify-api-db-migration task
	@cf curl /v3/apps/`cf app --guid notify-api-db-migration`/tasks?order_by=-created_at | jq -r ".resources[0].state"

.PHONY: cf-rollback
cf-rollback: ## Rollbacks the app to the previous release
	$(if ${CF_APP},,$(error Must specify CF_APP))
	rm ${CF_MANIFEST_PATH}
	cf cancel-deployment ${CF_APP}

.PHONY: check-if-migrations-to-run
check-if-migrations-to-run:
	@echo $(shell python3 scripts/check_if_new_migration.py)

.PHONY: cf-deploy-failwhale
cf-deploy-failwhale:  #
	$(if ${CF_SPACE},,$(error Must target space, eg `make preview cf-deploy-failwhale`))
	cd ./paas-failwhale; cf push notify-api-failwhale -f manifest.yml

.PHONY: enable-failwhale
enable-failwhale: ## Enable the failwhale app and disable api
	$(if ${DNS_NAME},,$(error Must target space, eg `make preview enable-failwhale`))
	# make sure failwhale is running first
	cf start notify-api-failwhale

	cf map-route notify-api-failwhale ${DNS_NAME} --hostname api
	cf unmap-route notify-api ${DNS_NAME} --hostname api
	@echo "Failwhale is enabled"

.PHONY: disable-failwhale
disable-failwhale: ## Disable the failwhale app and enable api
	$(if ${DNS_NAME},,$(error Must target space, eg `make preview disable-failwhale`))

	cf map-route notify-api ${DNS_NAME} --hostname api
	cf unmap-route notify-api-failwhale ${DNS_NAME} --hostname api
	cf stop notify-api-failwhale
	@echo "Failwhale is disabled"