const test = require('node:test');
const assert = require('node:assert/strict');
const fusion = require('../public/js/services/channelLanguageFusion.js');

const algo = {
    language: { code: 'fr', label: 'French', confidence: 70, status: 'medium' },
    languageScores: { fr: 70, en: 30 },
    languageEvidence: [{ code: 'fr', weight: 60, type: 'name-prefix', value: 'FR' }]
};

test('Laya-only mode maps backend confidence and language', () => {
    const result = fusion.applyLanguageMode(algo, { language: 'en', confidence: 0.88 }, 'laya');
    assert.deepEqual(result.language, { code: 'en', label: 'English', confidence: 88, status: 'high' });
    assert.equal(result.languageEvidence[0].type, 'laya');
});

test('hybrid mode combines Laya and algorithm evidence', () => {
    const result = fusion.applyLanguageMode(algo, { language: 'en', confidence: 0.9 }, 'hybrid');
    assert.equal(result.language.code, 'en');
    assert.ok(result.languageScores.en > result.languageScores.fr);
    assert.deepEqual(result.languageEvidence.map(item => item.type), ['name-prefix', 'laya']);
});

test('hybrid mode safely preserves algorithm output without Laya', () => {
    assert.equal(fusion.applyLanguageMode(algo, null, 'hybrid'), algo);
});

test('batch descriptors contain only safe metadata in the backend id/text contract', () => {
    const descriptor = fusion.buildLayaDescriptor({
        sourceId: 4,
        name: '|FR| Sports',
        groupTitle: 'Sports',
        sourceName: 'Provider',
        tvgId: 'sports.fr',
        url: 'https://user:secret@example.test/live'
    }, '4:channel-1', algo);
    assert.deepEqual(Object.keys(descriptor), ['id', 'text']);
    assert.equal(descriptor.id, '4:channel-1');
    assert.match(descriptor.text, /sourceId: 4/);
    assert.doesNotMatch(descriptor.text, /secret|https:\/\//);
});