import { globalState } from '../../app/global-state';
import { DomainHelper } from './domain-helper';

// Cookie manipulation abstraction
export class CookieProvider {
	/**
	 * Sets cookie value
	 *
	 * @param name  Name of the cookie
	 * @param value Cookie value
	 * @param expiration When the cookie should expire, set as a past date in order to delete the cookie
	 */
	static set(
		name: string,
		value: string,
		expiration?: Temporal.PlainDateTime,
	) {
		if (!globalState.windowExists) {
			return;
		}

		let domain = DomainHelper.getCookieDomain();
		if (domain.length > 0) {
			domain = `;domain=.${domain}`;
		}

		let realExpiration;
		if (expiration != null) {
			const instant = expiration.toZonedDateTime('UTC').toInstant();
			// eslint-disable-next-line no-restricted-syntax
			realExpiration = new Date(instant.epochMilliseconds).toUTCString();
		} else {
			realExpiration = '';
		}

		document.cookie = `${encodeURIComponent(name)}=${encodeURIComponent(value)};expires=${realExpiration}${domain};path=/`;
	}

	/**
	 * Obtains cookie value
	 *
	 * @param name  Name of the cookie
	 */
	static read(name: string): string {
		if (!globalState.windowExists) {
			return null;
		}

		name = `${name}=`;
		const ca = document.cookie.split(';');
		for (let i = 0; i < ca.length; i++) {
			let c = ca[i];
			while (c.charAt(0) == ' ') {
				c = c.substring(1);
			}
			if (c.includes(name)) {
				return c.substring(name.length, c.length);
			}
		}
		return null;
	}

	/**
	 * Removes cookie
	 *
	 * @param name  Name of the cookie
	 */
	static remove(name: string) {
		CookieProvider.set(
			name,
			'',
			Temporal.PlainDateTime.from('1990-01-01'),
		);
	}
}