#!/usr/bin/env bash
# Pure VirtIO filename helpers shared by TA-ProxMenu and its tests.

TAPM_VIRTIO_FILENAME_FROM_URL() {
	local url="${1%%\?*}"
	local filename="${url##*/}"

	[[ "$filename" =~ ^virtio-win(-0\.1\.[0-9]+)?\.iso$ ]] || return 1
	printf '%s\n' "$filename"
}

TAPM_VIRTIO_LABELED_FILENAME() {
	local source_filename="$1"
	local label="$2"
	local version=''

	[[ "$label" =~ ^[a-z0-9-]+$ ]] || return 1
	if [[ "$source_filename" =~ ^virtio-win-(0\.1\.[0-9]+)\.iso$ ]]; then
		version="${BASH_REMATCH[1]}"
	elif [[ "$source_filename" != 'virtio-win.iso' ]]; then
		return 1
	fi

	printf 'virtio-win-%s%s.iso\n' "$label" "${version:+-${version}}"
}

TAPM_VIRTIO_CACHE_VALID() {
	local checked_at="${1:-}"
	local now="${2:-}"
	local max_age="${3:-}"
	local filename="${4:-}"

	[[ "$checked_at" =~ ^[0-9]+$ &&
		"$now" =~ ^[0-9]+$ &&
		"$max_age" =~ ^[1-9][0-9]*$ &&
		"$filename" =~ ^virtio-win(-[0-9]+\.[0-9]+\.[0-9]+)?\.iso$ ]] ||
		return 1
	(( now >= checked_at && now - checked_at < max_age ))
}