#!/usr/bin/env bash
set -euo pipefail

DOCKER_IMAGE="zefie/llvm-mingw"
CURDIR="$(realpath "$(dirname "${0}")")"

get_latest() {
# Find all tags for ${DOCKER_IMAGE}, sort by creation timestamp (descending), return the newest
	latest_image=$(docker images --format '{{.CreatedAt}}\t{{.Repository}}:{{.Tag}}' ${DOCKER_IMAGE} \
	  | sort -r \
	  | cut -f2- \
	  | grep -v latest \
	  | head -n 1)

	if [[ -z "$latest_image" ]]; then
		echo "No images found for repository '${DOCKER_IMAGE}'" >&2
  		exit 1
	fi

	echo "$latest_image"
}

if [ "${1}" == "build" ]; then
	THETAG=$(date +%Y%m%d)
	cd "$(realpath "$(dirname "${0}")")"
	docker buildx build --tag "${DOCKER_IMAGE}:${THETAG}" .
elif [ "${1}" == "mklatest" ]; then
	LATEST=$(get_latest)
	if [ -z "${LATEST}" ]; then
		exit 1;
	fi
	docker tag "${LATEST}" ${DOCKER_IMAGE}:latest
	echo "Set ${DOCKER_IMAGE}:latest to ${LATEST}"
elif [ "${1}" == "run" ]; then
	shift
	IMAGE=$(get_latest)
	if [ -z "${IMAGE}" ]; then
		exit 1;
	fi
	export EMBEDDED=1
	CMD=(docker run --rm -it "${IMAGE}" "${@}")
	echo "Executing ${CMD[@]}"
	"${CMD[@]}"
elif [ "${1}" == "push" ]; then
	# push dated one first, then latest
	"${0}" mklatest
	IMAGE=$(get_latest)
	echo "Pushing ${IMAGE}"
	docker push "${IMAGE}"
	echo "Pushing ${DOCKER_IMAGE}:latest"
	docker push "${DOCKER_IMAGE}:latest"
else
	echo "Usage: ${0} [build|run|mklatest]"
	exit 1;
fi