#!/bin/sh
set -eu

deployment_directory=${1:-/opt/shd-build-stage}
source_directory=${2:-}
candidate_image=${3:-}
if [ -z "$source_directory" ] || [ ! -f "$source_directory/Dockerfile" ] || [ -z "$candidate_image" ]; then
	echo "Usage: deploy-staging.sh <deployment-directory> <source-directory> <candidate-image>" >&2
	exit 2
fi
compose_file="$deployment_directory/compose.staging.yml"
deploy_environment="$deployment_directory/.env.deploy"

compose() {
	docker compose --env-file "$deploy_environment" -f "$compose_file" "$@"
}

echo "Building the candidate image while the current staging service remains online."
docker build --label org.opencontainers.image.title=shd-build -t "$candidate_image" "$source_directory"

echo "Stopping SHD staging processes before accessing the embedded database."
compose stop scheduler app || true

echo "Creating a timestamped database backup when a staging database exists."
compose run --rm --no-deps app sh -c \
	'if [ -f "$TDR_DATABASE_PATH" ]; then node scripts/db-backup.mjs; else echo "No staging database exists yet; skipping backup."; fi'

echo "Applying additive schema migrations."
compose run --rm --no-deps app node scripts/db-migrate.mjs

echo "Starting the application and notification scheduler."
compose up -d --no-build --remove-orphans app scheduler

container_id=$(compose ps -q app)
attempt=0
while [ "$attempt" -lt 30 ]; do
	status=$(docker inspect --format '{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}' "$container_id")
	if [ "$status" = "healthy" ]; then
		echo "SHD staging deployment is healthy."
		exit 0
	fi
	if [ "$status" = "unhealthy" ] || [ "$status" = "exited" ] || [ "$status" = "dead" ]; then
		break
	fi
	attempt=$((attempt + 1))
	sleep 2
done

echo "SHD staging failed its health check."
compose logs --tail=150 app
exit 1