import { useState, useEffect, useRef } from 'react';
import { Product, onChangeArgs, InitialValues } 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 ) => {

        const newValue = Math.max( counter + value, 0 );

        if ( initialValues?.maxCount ) {
            if( newValue <= initialValues.maxCount ) {
                setCounter( newValue );
            } else {
                return
            }
        }

        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,
        
        increaseBy,
        reset
    }
}