#!/usr/bin/env bash

set -eu -o pipefail
verbose='' # we test for (non)emptiness
quiet='' # we test for (non)emptiness

source lib.sh

exitCode=0
checkNotPassed() {
	echo "WARN: $1"
	if [ "$exitCode" -eq 0 ]; then
		exitCode=2
	fi
}

isRecentInRepo() {
	local repoName="$1" targetName="$2" maxAge="$3"
	checkPathComponent "$repoName"
	checkPathComponent "$targetName"
	local targetFile="targets/$targetName" backupsDir="backups/$repoName"
	local hostname="$(< "$targetFile" jq --raw-output .hostname)" backedUpPath="$(< "$targetFile" jq --raw-output .path)"
	local dates=""
	while IFS='' read -r -d '' backupFile; do
		verbose "Processing $backupFile"
		local date
		if date="$(< "$backupFile" jq --exit-status --raw-output --arg hostname "$hostname" --arg path "$backedUpPath" 'if $hostname == .hostname and any(.paths[]; . == $path) then .time | sub("\\.\\d+"; "") | strptime("%Y-%m-%dT%H:%M:%S%z") | mktime else false end')"; then
			verbose "The snapshot is relevant and was created at $date"
			dates="$dates"$'\n'"$date"
		fi
	done < <(find "$backupsDir" -maxdepth 1 -type f -print0)
	local max="$(echo "$dates" | sort --numeric-sort --reverse | head -n 1)"
	if [ -n "$max" ]; then
		local age="$(("$now"-"$max"))"
		verbose "Last backup was at $max, now it's $now, the age is $age"
		if [ "$age" -gt "$maxAge" ]; then
			checkNotPassed "$targetName on $repoName is too old"
		else
			info "$targetName on $repoName is fresh enough"
		fi
	fi
}

isRecent() {
	abort "isRecent is not implemented yet"
}

now="$(date +%s)"

##### End of definitions, user defined checks go below this line

##### End of user defined checks, the rest of this file is a predefined trailer

exit "$exitCode"