const test = require('node:test');
const assert = require('node:assert/strict');
const {
    projectCatalog,
    serializeChannels
} = require('../server/services/liveProjectionService');
const {
    LIVE_PROJECTION_COLUMNS,
    LIVE_PROJECTION_SCHEMA_SQL
} = require('../server/db/liveProjectionSchema');

const item = (id, name, extra = {}) => ({
    id: `1:${id}`,
    source_id: 1,
    item_id: String(id),
    name,
    category_id: 'sports',
    ...extra
});

test('projection migration declares grouping and language columns', () => {
    assert.deepEqual(Object.keys(LIVE_PROJECTION_COLUMNS), [
        'logical_channel_id', 'grouping_fingerprint', 'grouping_input_hash',
        'quality_label', 'quality_rank', 'variant_rank', 'language_code',
        'language_confidence', 'language_scores', 'language_evidence',
        'language_detector', 'language_input_hash'
    ]);
    assert.match(LIVE_PROJECTION_SCHEMA_SQL, /CREATE TABLE IF NOT EXISTS logical_channels/);
    assert.match(LIVE_PROJECTION_SCHEMA_SQL, /CREATE TABLE IF NOT EXISTS catalog_projection_state/);
    assert.match(LIVE_PROJECTION_SCHEMA_SQL, /idx_items_logical_channel/);
});

test('projects beIN quality variants into one logical channel', () => {
    const groups = projectCatalog([
        item('uhd', '|FR| BEIN SPORTS 1 UHD'),
        item('4k', '|FR| BEIN SPORTS 1 4K'),
        item('car', 'FR-CAR| bein sports 1')
    ]);
    assert.equal(groups.length, 1);
    assert.equal(groups[0].fingerprint, 'bein sports 1');
    assert.equal(groups[0].displayName, 'beIN Sports 1');
    assert.equal(groups[0].variants.length, 3);
    assert.deepEqual(groups[0].variants.map(variant => variant.variantRank), [0, 1, 2]);
});

test('does not merge distinct numbered beIN channels', () => {
    const groups = projectCatalog([
        item('1', 'beIN Sports 1 HD'),
        item('2', 'beIN Sports 2 HD')
    ]);
    assert.deepEqual(groups.map(group => group.fingerprint), ['bein sports 1', 'bein sports 2']);
});

test('renaming a stream changes its projection membership and input hash', () => {
    const before = projectCatalog([item('1', 'beIN Sports 1 HD'), item('2', 'beIN Sports 1 4K')]);
    const after = projectCatalog([item('1', 'beIN Sports 2 HD'), item('2', 'beIN Sports 1 4K')]);
    assert.equal(before.length, 1);
    assert.equal(after.length, 2);
    const beforeRename = before.flatMap(group => group.variants).find(variant => variant.id === '1:1');
    const afterRename = after.flatMap(group => group.variants).find(variant => variant.id === '1:1');
    assert.notEqual(beforeRename.groupingInputHash, afterRename.groupingInputHash);
});

test('API serialization filters source rows upstream and hidden variants by option', () => {
    const rows = [
        {
            ...item('1', 'beIN Sports 1 HD'), logical_channel_id: 'logical:1',
            grouping_fingerprint: 'bein sports 1', display_name: 'beIN Sports 1',
            preferred_variant_id: '1:1', quality_label: 'HD', quality_rank: 2,
            variant_rank: 0, is_hidden: 0, category_hidden: 0, category_name: 'Sports Premium',
            user_favorite: 1, data: '{}'
        },
        {
            ...item('2', 'beIN Sports 1 4K'), logical_channel_id: 'logical:1',
            grouping_fingerprint: 'bein sports 1', display_name: 'beIN Sports 1',
            preferred_variant_id: '1:1', quality_label: '4K', quality_rank: 4,
            variant_rank: 1, is_hidden: 1, category_hidden: 0, category_name: 'Sports Premium',
            user_favorite: 0, data: '{}'
        }
    ];
    const visible = serializeChannels(rows, false);
    assert.equal(visible[0].variants.length, 1);
    assert.equal(visible[0].isFavorite, true);
    assert.equal(visible[0].groupTitle, 'Sports Premium');
    assert.equal(visible[0].categoryName, 'Sports Premium');
    assert.equal(visible[0].variants[0].groupTitle, 'Sports Premium');
    assert.equal(serializeChannels(rows, true)[0].variants.length, 2);
});

test('API serialization preserves an M3U groupTitle over the stored category fallback', () => {
    const rows = [{
        ...item('m3u', 'M3U Sports HD'), logical_channel_id: 'logical:m3u',
        grouping_fingerprint: 'm3u sports', display_name: 'M3U Sports',
        preferred_variant_id: '1:m3u', quality_label: 'HD', quality_rank: 2,
        variant_rank: 0, is_hidden: 0, category_hidden: 0,
        category_name: 'Fallback category', user_favorite: 0,
        data: JSON.stringify({ groupTitle: 'M3U Sports France' })
    }];
    const [channel] = serializeChannels(rows, false);
    assert.equal(channel.groupTitle, 'M3U Sports France');
    assert.equal(channel.variants[0].categoryName, 'M3U Sports France');
});