import { useEffect, useRef, useState } 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,
        increaseBy,

        isMaxCountReached: !!initialValues?.count && initialValues.maxCount === counter,
        maxCount: initialValues?.maxCount,
        reset
    }
}