import { Injectable } from '@angular/core';
import { v4 as uuidv4 } from 'uuid';

@Injectable({
	providedIn: 'root',
})
export class PollUtilsService {
	public makeUuid(): string {
		// TODO: how to be sure the uuid generated in front is available in backend ?
		// It could be a better way to generate uuids in backend.
		return uuidv4();
	}

	/**
	 * make a uniq slug for the current poll creation
	 * @param str
	 */
	public makeSlug(config: PollConfig): string {
		let str = '';
		str =
			config.creationDate.getFullYear() +
			'_' +
			(config.creationDate.getMonth() + 1) +
			'_' +
			config.creationDate.getDate() +
			'_' +
			config.myName +
			'_' +
			config.title;
		str = str.replace(/^\s+|\s+$/g, ''); // trim
		str = str.toLowerCase();

		// remove accents, swap ñ for n, etc
		const from = 'àáäâèéëêìíïîòóöôùúüûñç·/_,:;';
		const to = 'aaaaeeeeiiiioooouuuunc------';
		for (let i = 0, l = from.length; i < l; i++) {
			str = str.replace(new RegExp(from.charAt(i), 'g'), to.charAt(i));
		}

		str = str
			.replace(/[^a-z0-9 -]/g, '') // remove invalid chars
			.replace(/\s+/g, '-') // collapse whitespace and replace by -
			.replace(/-+/g, '-'); // collapse dashes

		return str;
	}
}