import { useEffect, useState, 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 ) => {
        
        
        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,

        increaseBy,
        reset,
    }
}