import { useCallback, useMemo, useRef } from 'preact/hooks'
import { useHashLocation } from './useHashLocation'

export const useQueryString = () => {
	const [location, setLocation] = useHashLocation()

	const values = useMemo(() => {
		const queryIndex = location.indexOf('?')

		if (queryIndex === -1) {
			return [location, new URLSearchParams()] as const
		}

		const search = location.slice(queryIndex + 1)

		return [location.slice(0, queryIndex), new URLSearchParams(search)] as const
	}, [location])

	const valuesRef = useRef(values)
	valuesRef.current = values

	const getValues = useCallback(() => {
		const [, searchParams] = valuesRef.current
		const result = {} as Record<string, string>

		searchParams.forEach((value, key) => {
			result[key] = value
		})

		return result
	}, [])

	const setValues = useCallback((values: Record<string, string>) => {
		const [baseLocation] = valuesRef.current

		const newParams = new URLSearchParams(values)
		setLocation(`${baseLocation}?${newParams}`)
	}, [])

	const hookData = useMemo(
		() => ({ getValues, setValues }),
		[getValues, setValues]
	)

	return hookData
}