#!/bin/bash

# Usage: ./app-version.sh app-directory
#
# Pull image tag versions and digests into each recipe's compose.yml file, and
# update git tags to point to the new ref

YQ="$HOME/.abra/vendor/yq"

function process_file() {
	compose_file="${1?Compose file not set}"

	mapfile -t services < <($YQ e -N '.services | keys | .[]' "$compose_file" | sort -u)

	for service in "${services[@]}"; do
		# 3wc: skip the "app" service unless we're in compose.yml; this service is
		# often repeated in other compose.*.yml files to extend options, but we only
		# want to add the deploy.label in one definition
		# TODO 3wc: make this smarter, what if a separate compose file extends
		# other services too?
		if [ "$compose_file" != "compose.yml" ] && [ "$service" = "app" ]; then
			echo "debug: skipping $service"
			continue
		fi

		echo "debug: processing $service"

		service_data=$(jq ".$app.versions.\"$latest_version\".$service" ~/.abra/apps.json)
		service_tag=$(echo "$service_data" | jq -r '.tag')
		service_digest=$(echo "$service_data" | jq -r '.digest')

		label="coop-cloud.\${STACK_NAME}.$service.version=${service_tag}-${service_digest}"

		# delete old label, if one exists
		$YQ eval -i "del(.services.$service.deploy.labels.[] | select(. == \"coop*\"))" "$compose_file"
		# add new label
		$YQ eval -i ".services.$service.deploy.labels += [\"$label\"]" "$compose_file"

	done
}

stack_dir="${ABRA_DIR:-$HOME/.abra}/apps/"

app="${1?No app provided}"

cd "$stack_dir/$app" || exit

mapfile -t extra_compose_files < <(ls -- compose.*.yml || true)

compose_files=("compose.yml" "${extra_compose_files[@]}")

mapfile -t git_tags < <(git tag -l)
latest_version="${git_tags[-1]}"
latest_version_message=$(git tag -l "$latest_version" --format='%(contents)')

echo "debug: latest version: $latest_version"

for compose_file in "${compose_files[@]}"; do
	process_file "$compose_file"
done

read -rp "On the next screen, you'll see the proposed changes; press 'q' to exit when you're done. Hit 'return' / 'enter' to continue now" choice

git diff

read -rp "Commit this change and replace the '$latest_version' tag? (y/[n])? " choice

if [ "${choice,,}" != "y" ]; then
	exit
fi

git commit -a -m "Auto-add service labels"

git tag -d "$latest_version"

git tag -a "$latest_version" -m "$latest_version_message"