import React, {useEffect, useRef, useState} from "react";
import {EmitterSubscription, Keyboard, Platform} from "react-native";

/*
* This func. listen the keyboard and
* write to isOpen true or false
* depending on keyboard status
* */
export const useKeyboardStatus = () => {
    const [isOpen, setIsOpen] = useState<boolean>(false);
    const [keyboardHeight, setKeyboardHeight] = useState<number>(0);
    const keyboardHideListener = useRef<null|EmitterSubscription>(null);
    const keyboardShowListener = useRef<null|EmitterSubscription>(null);

    const onKeyboardShow = (e: {endCoordinates:{height:React.SetStateAction<number>;};}) => {
        setKeyboardHeight(e.endCoordinates.height);
        setIsOpen(true);
    };

    const onKeyboardHide = () => {
        setKeyboardHeight(0);
        setIsOpen(false);
    };

    useEffect(() => {
        keyboardShowListener.current = Keyboard.addListener('keyboardDidShow', onKeyboardShow);
        keyboardHideListener.current = Keyboard.addListener('keyboardDidHide', onKeyboardHide);

        return () => {
            keyboardShowListener.current?.remove();
            keyboardHideListener.current?.remove();
        };
    }, []);

    return {
        isOpen: isOpen,
        keyboardHeight: keyboardHeight,
        keyboardPlatform: Platform.OS
    };
}