import { createElement, Component } from '@wordpress/element'
import _ from 'underscore'
import { __ } from 'ct-i18n'
import cls from 'classnames'

const InputWithOnlyNumbers = ({
	disabled,
	className = '',
	value,
	onBlur,
	onChange,
	step = 1,
	placeholder = __('Default', 'blocksy'),
}) => (
	<input
		type="text"
		value={value}
		onKeyDown={(e) => {
			// Allow: backspace, delete, tab, escape, enter and.
			if (
				// Allow Esc
				[46, 8, 9, 27, 13, 110, 190, 27].indexOf(e.keyCode) > -1 ||
				// Allow: Ctrl+A.
				(e.keyCode == 65 && e.ctrlKey === true) ||
				// Allow -.
				e.keyCode == 109 ||
				e.keyCode == 189 ||
				e.keyCode == 173 ||
				// Allow: Ctrl+C.
				(e.keyCode == 67 && e.ctrlKey === true) ||
				// Allow: Ctrl+X.
				(e.keyCode == 88 && e.ctrlKey === true) ||
				// Allow: home, end, left, right.
				(e.keyCode >= 35 &&
					e.keyCode <= 39 &&
					e.keyCode !== 38 &&
					e.keyCode !== 40)
			) {
				// Let it happen, don't do anything.
				return
			}

			let valueForComputation = '__unset__'

			if (value.toString().trim().length === 0) {
				valueForComputation = 0
			} else {
				let maybeValue = parseFloat(value)

				if (maybeValue || maybeValue === 0) {
					valueForComputation = maybeValue
				}
			}

			let actualStep = e.shiftKey ? step * 10 : step

			/**
			 * Arrow up
			 */
			if (e.keyCode === 38 && value !== '__unset__') {
				onChange(valueForComputation + actualStep, true)
			}

			/**
			 * Arrow down
			 */
			if (e.keyCode === 40 && value !== '__unset__') {
				onChange(valueForComputation - actualStep, true)
			}

			// Ensure that it is a number and stop the keypress.
			if (
				(e.shiftKey || e.keyCode < 48 || e.keyCode > 57) &&
				(e.keyCode < 96 || e.keyCode > 105)
			) {
				e.preventDefault()
			}
		}}
		onChange={({ target: { value } }) => onChange(value)}
		placeholder={placeholder}
		onBlur={() => onBlur && onBlur}
		className={cls({
			inactive: value === 'auto',
		})}
	/>
)

export default InputWithOnlyNumbers