import { useEffect, useState, useRef } from 'react';
import { onChangeArgs, Product, 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
	};  
}