// *************************************************************************
// * (C)opyright 2026         by Ruben Carlo Benante                       *
// *                                                                       *
// * This program is free software; you can redistribute it and/or modify  *
// *  it under the terms of the GNU General Public License as published by *
// *  the Free Software Foundation, either version 3 of the License, or    *
// *  (at your option) any later version.                                  *
// *                                                                       *
// * This program is distributed in the hope that it will be useful,       *
// *  but WITHOUT ANY WARRANTY; without even the implied warranty of       *
// *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
// *  GNU General Public License for more details.                         *
// *                                                                       *
// * You should have received a copy of the GNU General Public License     *
// *  along with this program.  If not, see http://www.gnu.org/licenses/.  *
// *                                                                       *
// * Contact author at:                                                    *
// *  Ruben Carlo Benante                                                  *
// *  rcb@beco.cc                                                          *
// *************************************************************************

import { test } from 'node:test';
import assert from 'node:assert/strict';
import {
	extractTimeId,
	extractPrefix,
	computeBasename,
	generateSlug,
	buildFilename,
} from './slug.ts';

test('slug folds accents and collapses, preserving case', () => {
	assert.equal(
		generateSlug('Ciências Políticas - Visão Geral'),
		'Ciencias-Politicas-Visao-Geral',
	);
	assert.equal(generateSlug('Citações'), 'Citacoes');
});

test('slug collapses runs of punctuation and whitespace to one dash', () => {
	assert.equal(generateSlug('  Hello,   World!!  '), 'Hello-World');
	assert.equal(generateSlug('a/b:c*d?e'), 'a-b-c-d-e');
});

test('empty or heading-less input yields empty slug', () => {
	assert.equal(generateSlug(''), '');
	assert.equal(generateSlug('   ---   '), '');
});

test('extractTimeId accepts 12/14/18-digit prefixes and a non-dash boundary', () => {
	assert.equal(extractTimeId('202607281454-x'), '202607281454'); // 12, dash
	assert.equal(extractTimeId('20260728145404-x'), '20260728145404'); // 14
	assert.equal(extractTimeId('202607281454049999-x'), '202607281454049999'); // 18
	assert.equal(extractTimeId('20260728145404'), '20260728145404'); // bare id
	assert.equal(extractTimeId('202607290947 test pkm'), '202607290947'); // space
	assert.equal(extractTimeId('202607290947test'), '202607290947'); // letters
	assert.equal(extractTimeId('my-note'), null);
	assert.equal(extractTimeId('2026-budget'), null); // too short
	assert.equal(extractTimeId('2026072814540499999-x'), null); // 19, too long
});

test('buildFilename collapses empty slug to bare id', () => {
	assert.equal(
		buildFilename('20260728145404', 'some-title'),
		'20260728145404-some-title',
	);
	assert.equal(buildFilename('20260728145404', ''), '20260728145404');
});

test('extractPrefix: timeid always, date only when allowed, dash does not split', () => {
	assert.equal(extractPrefix('202607302233 vai', false), '202607302233'); // timeid
	assert.equal(extractPrefix('2026-07-30-Journal', true), '2026-07-30'); // date, dash kept
	assert.equal(extractPrefix('2026-07-30 Journal', true), '2026-07-30');
	assert.equal(extractPrefix('2026-07-30 Journal', false), null); // date off
	assert.equal(extractPrefix('my-note', true), null);
});

test('computeBasename: sticky tail rule', () => {
	// H1 sets the tail
	assert.equal(computeBasename('202607302233', 'Home', false), '202607302233-Home');
	// delete H1 keeps the last slug (sticky)
	assert.equal(computeBasename('202607302233-Home', '', false), '202607302233-Home');
	// no H1: clean the existing tail
	assert.equal(computeBasename('202607291108 vai', '', false), '202607291108-vai');
	// punctuation-only H1: keep the existing tail
	assert.equal(computeBasename('2026-07-30-Home', '!!!', true), '2026-07-30-Home');
	// bare stays bare
	assert.equal(computeBasename('202607302233', '', false), '202607302233');
	// no usable title -> left untouched
	assert.equal(computeBasename('2026-07-30 !!!', '', true), '2026-07-30 !!!');
	// date mode gating
	assert.equal(computeBasename('2026-07-30 Journal', '', true), '2026-07-30-Journal');
	assert.equal(computeBasename('2026-07-30 Journal', '', false), null);
	// unrecognized note
	assert.equal(computeBasename('my-note', 'Title', true), null);
});