import config from 'config';

import {
	TextCensor,
	RegExpMatcher,
	englishDataset,
	englishRecommendedTransformers,
	DataSet,
	pattern,
	// asteriskCensorStrategy,
} from 'obscenity';

const textCensor = new TextCensor();

// built-in asterisk strategy replaces entire word
textCensor.setStrategy(({
	input,
	startIndex,
	endIndex,
	matchLength,
}) => {
	if (matchLength <= 2) {
		return '*'.repeat(matchLength);
	}

	return `${input.at(startIndex)}${'*'.repeat(matchLength - 2)}${input.at(endIndex)}`;
});

const dataset = new DataSet().addAll(englishDataset);

config.restrictions.censors.forEach((word) => {
	dataset.addPhrase((phrase) => phrase
		.setMetadata({ originalWord: word })
		.addPattern(pattern`${word}`));
});

const matcher = new RegExpMatcher({
	...dataset.build(),
	...englishRecommendedTransformers,
});

export function censor(text, restriction) {
	if (!text) {
		return null;
	}

	if (!restriction) {
		return text;
	}

	const censorMatches = matcher.getAllMatches(text);
	const censoredText = textCensor.applyTo(text, censorMatches);

	return censoredText;
}