import { makeStyles } from '@material-ui/core';
import clsx from 'clsx';
import React, { useCallback } from 'react';

import { isMobileBrowser } from '../../../environment/utils';

interface SwitchProps {

    /**
     * Whether or not the toggle is on.
     */
    checked: boolean;

    /**
     * Whether or not the toggle is disabled.
     */
    disabled?: boolean;

    /**
     * Id of the toggle.
     */
    id?: string;

    /**
     * Toggle change callback.
     */
    onChange: (on?: boolean) => void;
}

const useStyles = makeStyles((theme: any) => {
    return {
        container: {
            position: 'relative',
            backgroundColor: theme.palette.ui05,
            borderRadius: '12px',
            width: '40px',
            height: '24px',
            border: 0,
            outline: 0,
            cursor: 'pointer',
            transition: '.3s',
            display: 'inline-block',

            '&.disabled': {
                backgroundColor: theme.palette.ui05,
                cursor: 'default',

                '& .toggle': {
                    backgroundColor: theme.palette.ui03
                }
            },

            '&.is-mobile': {
                height: '32px',
                width: '50px',
                borderRadius: '32px'
            }
        },

        containerOn: {
            backgroundColor: theme.palette.action01
        },

        toggle: {
            width: '16px',
            height: '16px',
            position: 'absolute',
            top: '4px',
            left: '4px',
            backgroundColor: theme.palette.ui10,
            borderRadius: '100%',
            transition: '.3s',

            '&.is-mobile': {
                width: '24px',
                height: '24px'
            }
        },

        toggleOn: {
            left: '20px',

            '&.is-mobile': {
                left: '22px'
            }
        },

        checkbox: {
            height: 0,
            width: 0
        }
    };
});

const Switch = ({ id, checked, disabled, onChange }: SwitchProps) => {
    const styles = useStyles();
    const isMobile = isMobileBrowser();

    const change = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
        onChange(e.target.checked);
    }, []);

    return (<label
        className = { clsx('toggle-container', styles.container, checked && styles.containerOn,
            isMobile && 'is-mobile', disabled && 'disabled') }>
        <input
            type = 'checkbox'
            { ...(id ? { id } : {}) }
            checked = { checked }
            className = { styles.checkbox }
            disabled = { disabled }
            onChange = { change } />
        <div className = { clsx('toggle', styles.toggle, checked && styles.toggleOn, isMobile && 'is-mobile') } />
    </label>);
};

export default Switch;