import React from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
import { countriesSupported } from '../helpers/supportedCountries';
import { allSupportedPostcodeExamples } from '../helpers/supportedPostcodeExamples';

const postcodeLabel = Object.keys(countriesSupported).reduce(
	(previous, countryCode) => {
		if (countryCode === 'USA') {
			previous[countryCode] = 'Zip Code';
		} else if (countryCode === 'GBR') {
			previous[countryCode] = 'Postcode';
		} else {
			previous[countryCode] = 'Postal Code';
		}
		return previous;
	},
	{}
);

const promptLabel = Object.keys(countriesSupported).reduce(
	(previous, countryCode) => {
		if (countryCode === 'USA') {
			previous[countryCode] = 'Please enter your 5 digit Zip Code';
		} else if (countryCode === 'CAN') {
			previous[countryCode] = 'Please enter your 6 digit postal code';
		} else if (countryCode !== 'GBR') {
			//GBR has no label
			previous[countryCode] = 'Please enter your postal code';
		}
		return previous;
	},
	{}
);

const placeholderLabel = Object.keys(allSupportedPostcodeExamples).reduce(
	(previous, countryCode) => {
		previous[countryCode] = 'e.g. ' + allSupportedPostcodeExamples[countryCode];
		return previous;
	},
	{}
);
export function DeliveryPostcode({
	value = '',
	country = '',
	isDisabled = false,
	hasError = false,
	isHidden = false,
	pattern,
	additionalFieldInformation,
	changePostcodeUrl = '',
}) {
	const postcodeReference = postcodeLabel[country.toUpperCase()] || 'Postcode';
	const promptReference = promptLabel[country.toUpperCase()];
	const placeholderReference =
		placeholderLabel[country.toUpperCase()] ||
		`Enter your ${postcodeReference}`;

	const inputWrapperClassNames = classNames([
		'o-forms-input',
		'o-forms-input--text',
		{ 'o-forms-input--invalid': hasError },
	]);

	const deliveryPostcodeFieldClassNames = classNames([
		'o-forms-field',
		{ ncf__hidden: isHidden },
	]);

	const fieldErrorClassNames = classNames([
		'o-forms-input__error',
		{
			'additional-field-information__with-field-error':
				additionalFieldInformation,
		},
	]);

	return (
		<label
			id="deliveryPostcodeField"
			className={deliveryPostcodeFieldClassNames}
			data-validate="required"
			htmlFor="deliveryPostcode"
		>
			<span className="o-forms-title">
				<span className="o-forms-title__main">
					<span data-reference="postcode">{postcodeReference}</span>
				</span>
				<span className="o-forms-title__prompt">{promptReference}</span>
			</span>

			<span className={inputWrapperClassNames}>
				<input
					type="text"
					id="deliveryPostcode"
					name="deliveryPostcode"
					defaultValue={`${value}`}
					placeholder={placeholderReference}
					autoComplete="postal-code"
					data-trackable="delivery-postcode"
					aria-required="true"
					required
					pattern={pattern}
					disabled={isDisabled}
				/>
				<span className={fieldErrorClassNames}>
					Please enter a valid{' '}
					<span data-reference="postcode">{postcodeReference}</span>.
				</span>
				{additionalFieldInformation ? (
					<p className="additional-field-information">
						{additionalFieldInformation}
					</p>
				) : null}
				{changePostcodeUrl ? (
					<a
						href={changePostcodeUrl}
						style={{ fontSize: '12px' }}
						className="change-postcode-url"
						data-trackable="change-progress"
					>
						{`Change ${postcodeReference}`}
					</a>
				) : null}
			</span>
		</label>
	);
}

DeliveryPostcode.propTypes = {
	country: PropTypes.string,
	value: PropTypes.string,
	pattern: PropTypes.string,
	isDisabled: PropTypes.bool,
	hasError: PropTypes.bool,
	isHidden: PropTypes.bool,
	additionalFieldInformation: PropTypes.node,
	changePostcodeUrl: PropTypes.string,
};