#!/usr/bin/env bash

set -eu -o pipefail

if [[ "${1:-}" == "diff" ]]; then
	mode='diff'
else
	mode='apply'
fi
timeout='120'
master_node='k3s-1'

cur_hashes="$(kubectl get node "$master_node" -o jsonpath='{.metadata.annotations.home-server-hashes}')"

compare_hash() {
	yaml="$1"
	hash=$(shasum "$yaml" | awk '{print $1}')

	if [[ "$cur_hashes" =~ $hash ]]; then
		return 0
	else
		return 1
	fi
}

# Deploy all services if there is a template change
for yaml in templates/*.yaml; do
	if ! compare_hash "$yaml"; then
		deploy_all=true
	fi
done

# Deploy individual service changes
for yaml in values/*.yaml; do
	if ! compare_hash "$yaml" || [[ "${deploy_all:-}" == true ]]; then
		name=$(grep '^name:' "$yaml" | awk '{print $2}')
		if [[ "$mode" == 'apply' ]]; then
			helm upgrade --install --atomic --timeout="${timeout}s" -f "$yaml" "$name" .
			made_changes=true
		elif [[ "$mode" == 'diff' ]]; then
			helm diff upgrade -f "$yaml" "$name" .
		fi
	fi
done

if [[ "${made_changes:-}" ]]; then
	new_hashes="$(find . -type f -name '*.yaml' -exec shasum {} \+)"
	kubectl annotate node "$master_node" home-server-hashes="$new_hashes" --overwrite=true
fi