import { React, PropTypes, classnames } from '@gravityforms/libraries';
import { spacerClasses, uniqueId } from '@gravityforms/utils';
import { useStateWithDep } from '@gravityforms/react-utils';
import Label from '../Label';
import HelpText from '../HelpText';

const { useState, forwardRef } = React;

/**
 * @module Textarea
 * @description A textarea component.
 *
 * @since 1.1.18
 *
 * @param {object}                     props                    Component props.
 * @param {boolean}                    props.controlled         Whether the textarea is controlled or not.
 * @param {object}                     props.customAttributes   Custom attributes for the component.
 * @param {string|Array|object}        props.customClasses      Custom classes for the component.
 * @param {boolean}                    props.disabled           If textarea is disabled.
 * @param {object}                     props.helpTextAttributes Custom attribute for the help text.
 * @param {string}                     props.helpTextPosition   The position of the help text.
 * @param {string}                     props.id                 Optional id. Auto generated if not passed.
 * @param {object}                     props.labelAttributes    Custom attributes for the label.
 * @param {string}                     props.name               The name of the textarea.
 * @param {Function}                   props.onBlur             On blur function handler.
 * @param {Function}                   props.onChange           On change function handler.
 * @param {Function}                   props.onFocus            On focus function handler.
 * @param {string}                     props.placeholder        The optional placeholder attribute for the textarea.
 * @param {string|number|Array|object} props.spacing            The spacing for the component, as a string, number, array, or object.
 * @param {string}                     props.theme              The theme of the textarea.
 * @param {string}                     props.value              The textarea's initial value.
 * @param {object}                     props.wrapperAttributes  Custom attributes for the wrapper element.
 * @param {string|Array|object}        props.wrapperClasses     Custom classes for the wrapper element.
 * @param {object}                     props.wrapperTagName     Tag to use for the textarea wrapper. Defaults to `div`.
 * @param {object|null}                ref                      Ref to the component.
 *
 * @return {JSX.Element} The Textarea component.
 *
 * @example
 * import Textarea from '@gravityforms/components/react/admin/elements/Textarea';
 *
 * return (
 *     <Textarea
 *         id="textarea-id"
 *         placeholder="Textarea placeholder"
 *         onChange={ () => {} }
 *     />
 * );
 *
 */
const Textarea = forwardRef( ( {
	controlled = false,
	customAttributes = {},
	customClasses = [],
	disabled = false,
	helpTextAttributes = {},
	helpTextPosition = 'above',
	id = '',
	labelAttributes = {},
	name = '',
	onBlur = () => {},
	onChange = () => {},
	onFocus = () => {},
	placeholder = '',
	spacing = '',
	theme = 'cosmos',
	value = '',
	wrapperAttributes = {},
	wrapperClasses = [],
	wrapperTagName = 'div',
}, ref ) => {
	const useStateFxn = controlled ? useStateWithDep : useState;
	const [ inputValue, setInputValue ] = useStateFxn( value );

	const inputId = id || uniqueId( 'gform-textarea' );
	const helpTextId = `${ inputId }-help-text`;

	const wrapperProps = {
		...wrapperAttributes,
		className: classnames( {
			'gform-input-wrapper': true,
			'gform-input-wrapper--textarea': true,
			'gform-input-wrapper--disabled': disabled,
			[ `gform-input-wrapper--theme-${ theme }` ]: true,
			...spacerClasses( spacing ),
		}, wrapperClasses ),
		ref,
	};

	const inputProps = {
		...customAttributes,
		className: classnames( {
			'gform-input': true,
			'gform-input--textarea': true,
		}, customClasses ),
		disabled: disabled || labelAttributes?.locked === true,
		id: inputId,
		name,
		onBlur,
		onChange: ( e ) => {
			const { value: newInputValue } = e.target;
			setInputValue( newInputValue );
			onChange( newInputValue, e );
		},
		onFocus,
		value: inputValue,
	};

	if ( placeholder ) {
		inputProps.placeholder = placeholder;
	}
	if ( helpTextAttributes.content ) {
		inputProps[ 'aria-describedby' ] = helpTextId;
	}

	const labelProps = {
		...labelAttributes,
		htmlFor: inputId,
	};

	const helpTextProps = {
		...helpTextAttributes,
		id: helpTextId,
	};

	const Container = wrapperTagName;

	return (
		<Container { ...wrapperProps }>
			<Label { ...labelProps } />
			{ helpTextPosition === 'above' && <HelpText { ...helpTextProps } /> }
			<textarea { ...inputProps } />
			{ helpTextPosition === 'below' && <HelpText { ...helpTextProps } /> }
		</Container>
	);
} );

Textarea.propTypes = {
	customAttributes: PropTypes.object,
	customClasses: PropTypes.oneOfType( [
		PropTypes.string,
		PropTypes.array,
		PropTypes.object,
	] ),
	disabled: PropTypes.bool,
	helpTextAttributes: PropTypes.object,
	helpTextPosition: PropTypes.string,
	id: PropTypes.string,
	labelAttributes: PropTypes.object,
	name: PropTypes.string,
	onBlur: PropTypes.func,
	onChange: PropTypes.func,
	onFocus: PropTypes.func,
	placeholder: PropTypes.string,
	spacing: PropTypes.oneOfType( [
		PropTypes.string,
		PropTypes.number,
		PropTypes.array,
		PropTypes.object,
	] ),
	theme: PropTypes.string,
	value: PropTypes.string,
	wrapperAttributes: PropTypes.object,
	wrapperClasses: PropTypes.oneOfType( [
		PropTypes.string,
		PropTypes.array,
		PropTypes.object,
	] ),
	wrapperTagName: PropTypes.string,
};

Textarea.displayName = 'Textarea';

export default Textarea;
