import { useEffect, useState, useRef } from 'react';
import { InitialValues, onChangeArgs, Product } from '../interfaces/interfaces';

interface useProductArgs {
	product: Product;
	onChange?: ( args: onChangeArgs ) => void;
	value?: number
	initialValues?: InitialValues;
}

export const useProduct = ({ onChange, product, value = 0, initialValues }: useProductArgs ) => {

	const [counter, setCounter] = useState<number>( initialValues?.count || value );
	const isMounted = useRef(false);
	
	const increaseBy = (value: number) => {
		let newValue = Math.max(counter + value, 0)
		if ( initialValues?.maxCount ) {
			newValue = Math.min( newValue, initialValues.maxCount );
		}

		setCounter( newValue );
		onChange && onChange({ count: newValue, product });
	}

	const reset = () => {
		setCounter(initialValues?.count || value)
	}
	
	useEffect(() => {
		if ( !isMounted.current ) return;
		setCounter( value )
	}, [value])
		
	useEffect(() => {
	  isMounted.current = true;
	}, [])

	return {
		counter,
		isMaxCountReached: !!initialValues?.count && initialValues.maxCount === counter,
		maxCount: initialValues?.maxCount,

		reset,
		increaseBy,
	};
};