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

test('maps projected logical channels to the frontend variant format', () => {
    const response = {
        projection: { status: 'success', stale: false },
        channels: [{
            id: 'logical:one', fingerprint: 'news', displayName: 'News',
            variants: [{
                id: 42, sourceId: 7, name: 'News HD', categoryId: 'News',
                streamIcon: 'logo.png', streamUrl: 'https://stream.test/live',
                tvgId: 'news.fr', isFavorite: true, isHidden: true
            }]
        }]
    };
    const mapped = projection.mapResponse(response, [{ id: 7, type: 'm3u', name: 'Local' }]);
    assert.deepEqual(mapped.channels[0], {
        id: '42', sourceId: 7, name: 'News HD', categoryId: 'News',
        streamIcon: 'logo.png', streamUrl: 'https://stream.test/live', tvgId: 'news.fr',
        isFavorite: true, isHidden: true, logicalId: 'logical:one',
        logicalFingerprint: 'news', logicalDisplayName: 'News',
        streamId: '42', tvgLogo: 'logo.png',
        url: 'https://stream.test/live', groupTitle: 'News', sourceType: 'm3u', sourceName: 'Local',
        language: { code: 'und', short: 'UND', label: 'Unknown', confidence: 0 }
    });
    assert.equal(mapped.favorites.has('7:42'), true);
    assert.equal(mapped.hiddenItems.has('channel:7:42'), true);
});

test('rejects stale projections so ChannelList can use its legacy fallback', () => {
    assert.equal(projection.canUse({ projection: { stale: true }, channels: [] }), false);
    assert.equal(projection.canUse({ projection: { stale: false }, channels: [] }), true);
    assert.equal(projection.canUse(null), false);
});