import type { LocationQuery } from 'vue-router'
import {
	DEFAULT_PAGE_SIZE,
	PAGE_SIZES,
	SEARCH_MAX_LENGTH,
	firstQueryValue,
	parsePositiveInteger,
} from '@/lib/pageQuery'

export interface DirectoryQuery {
	q: string
	page: number
	size: number
}

export function parseDirectoryQuery(query: LocationQuery): DirectoryQuery {
	const page = firstQueryValue(query.page)
	const size = Number(firstQueryValue(query.size))
	return {
		q: firstQueryValue(query.q).slice(0, SEARCH_MAX_LENGTH),
		page: parsePositiveInteger(page) ?? 1,
		size: PAGE_SIZES.includes(size) ? size : DEFAULT_PAGE_SIZE,
	}
}

export function toDirectoryRouteQuery(query: DirectoryQuery, rest: LocationQuery = {}) {
	const route: Record<string, string> = {}
	for (const [key, value] of Object.entries(rest)) {
		if (key !== 'q' && key !== 'page' && key !== 'size') {
			route[key] = firstQueryValue(value)
		}
	}
	if (query.q) {
		route.q = query.q
	}
	if (query.page !== 1) {
		route.page = String(query.page)
	}
	if (query.size !== DEFAULT_PAGE_SIZE) {
		route.size = String(query.size)
	}
	return route
}