#!/bin/bash

set -e

if [[ -z "$TARGET" ]]; then
	echo "TARGET environment variable must be set e.g. TARGET=stage3:latest."
	exit 1
fi

# Split the TARGET variable into two elements separated by colons
IFS=: read -r NAME MANIFEST_TAG <<< "${TARGET}"

VERSION=${VERSION:-$(date -u +%Y%m%d)}

ORG=${ORG:-gentoo}

case "${TARGET}" in
	"stage3:latest")
	    TAGS=("amd64-openrc" "armv5tel-openrc" "armv6j_hardfp-openrc" "armv7a_hardfp-openrc" "arm64-openrc" "i686-openrc" "ppc64le-openrc" "rv64_lp64d-openrc" "s390x")
		;;
	"stage3:desktop")
	    TAGS=("amd64-desktop-openrc" "arm64-desktop-openrc")
		;;
	"stage3:hardened")
	    TAGS=("amd64-hardened-openrc" "i686-hardened-openrc")
		;;
	"stage3:llvm")
	    TAGS=("amd64-llvm-openrc" "arm64-llvm-openrc")
		;;
	"stage3:llvm-systemd")
	    TAGS=("amd64-llvm-systemd" "arm64-llvm-systemd")
		;;
	"stage3:musl")
	    TAGS=("amd64-musl" "armv7a_hardfp_musl-openrc" "arm64-musl" "i686-musl")
		;;
	"stage3:musl-hardened")
	    TAGS=("amd64-musl-hardened" "arm64-musl-hardened" "ppc64le-musl-hardened-openrc")
		;;
	"stage3:musl-llvm")
	    TAGS=("amd64-musl-llvm" "arm64-musl-llvm")
		;;
	"stage3:nomultilib")
	    TAGS=("amd64-nomultilib-openrc")
		;;
	"stage3:nomultilib-systemd")
	    TAGS=("amd64-nomultilib-systemd")
		;;
	"stage3:systemd")
	    TAGS=("amd64-systemd" "armv5tel-systemd" "armv6j_hardfp-systemd" "armv7a_hardfp-systemd" "arm64-systemd" "i686-systemd" "ppc64le-systemd" "rv64_lp64d-systemd")
		;;
	*)
		echo "Done! No manifests to push for TARGET=${TARGET}."
	    exit 0
		;;
esac
MANIFEST="${TARGET}"

# Latest manifests
IMAGES=()
for TAG in "${TAGS[@]}"; do
	IMAGE="${ORG}/${NAME}:${TAG}"
	if docker manifest inspect "${IMAGE}" &>/dev/null; then
		IMAGES+=("${IMAGE}")
	fi
done

docker manifest create "${ORG}/${MANIFEST}" "${IMAGES[@]}"
docker manifest push "${ORG}/${MANIFEST}"

# Dated manifests
MANIFEST="${MANIFEST}-${VERSION}"
MANIFEST="${MANIFEST/:latest-/:}"  # Remove "latest" tag prefix

IMAGES=()
for TAG in "${TAGS[@]}"; do
	IMAGE="${ORG}/${NAME}:${TAG}-${VERSION}"
	if docker manifest inspect "${IMAGE}" &>/dev/null; then
		IMAGES+=("${IMAGE}")
	fi
done

docker manifest create "${ORG}/${MANIFEST}" "${IMAGES[@]}"
docker manifest push "${ORG}/${MANIFEST}"