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

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

export const useProduct = (props: useProductArgs) => {
  const { onChange, product, value = 0, initialValues } = props;
  const [counter, setCounter] = useState<number>(initialValues?.count || value);

  const isMounted = useRef(false);
  useEffect(() => {
    isMounted.current = true;
  }, []);

  useEffect(() => {
    if (!isMounted.current) return;
    setCounter(value);
  }, [value]);

  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);
  };

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

    increaseBy,
    reset,
  };
};