import type { LocationQuery } from 'vue-router'

export const PAGE_SIZES = [5, 25, 50, 100]
export const DEFAULT_PAGE_SIZE = 25
export const SEARCH_MAX_LENGTH = 200

const POSITIVE_INTEGER = /^[1-9]\d*$/

export function firstQueryValue(value: LocationQuery[string] | undefined) {
	const single = Array.isArray(value) ? value[0] : value
	return single ?? ''
}

export function parsePositiveInteger(value: string) {
	return POSITIVE_INTEGER.test(value) ? Number(value) : null
}

export function sameRouteQuery(left: LocationQuery, right: Record<string, string>) {
	const leftKeys = Object.keys(left)
	return (
		leftKeys.length === Object.keys(right).length &&
		leftKeys.every((key) => firstQueryValue(left[key]) === right[key])
	)
}