const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const { JSDOM } = require('jsdom');
const Database = require('better-sqlite3');
const {
    ensureColumns,
    LIVE_PROJECTION_COLUMNS,
    LIVE_PROJECTION_SCHEMA_SQL
} = require('../server/db/liveProjectionSchema');
const liveProjection = require('../server/services/liveProjectionService');

const root = path.resolve(__dirname, '..');
const script = relativePath => fs.readFileSync(path.join(root, 'public', relativePath), 'utf8');
const wait = milliseconds => new Promise(resolve => setTimeout(resolve, milliseconds));

function createDb() {
    const db = new Database(':memory:');
    db.exec(`
        CREATE TABLE categories (
            id TEXT PRIMARY KEY,
            source_id INTEGER NOT NULL,
            category_id TEXT NOT NULL,
            type TEXT NOT NULL,
            name TEXT NOT NULL,
            parent_id TEXT,
            is_hidden INTEGER DEFAULT 0,
            data JSON
        );
        CREATE TABLE playlist_items (
            id TEXT PRIMARY KEY,
            source_id INTEGER NOT NULL,
            item_id TEXT NOT NULL,
            type TEXT NOT NULL,
            name TEXT NOT NULL,
            category_id TEXT,
            parent_id TEXT,
            stream_icon TEXT,
            stream_url TEXT,
            container_extension TEXT,
            rating REAL,
            year TEXT,
            added_at TEXT,
            is_hidden INTEGER DEFAULT 0,
            is_favorite INTEGER DEFAULT 0,
            data JSON
        );
        CREATE TABLE favorites (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            user_id INTEGER NOT NULL,
            source_id INTEGER NOT NULL,
            item_id TEXT NOT NULL,
            item_type TEXT NOT NULL
        );
    `);
    ensureColumns(db, 'playlist_items', LIVE_PROJECTION_COLUMNS);
    db.exec(LIVE_PROJECTION_SCHEMA_SQL);
    return db;
}

function seedLive(db, id, name) {
    db.prepare(`
        INSERT INTO playlist_items
            (id, source_id, item_id, type, name, category_id, stream_icon, stream_url, data)
        VALUES (?, 1, ?, 'live', ?, 'sports', '', ?, ?)
    `).run(
        `1:${id}`,
        id,
        name,
        `https://streams.test/${id}.m3u8`,
        JSON.stringify({ groupTitle: 'Sports' })
    );
}

function createChannelListDom() {
    const dom = new JSDOM(`<!doctype html>
        <input id="channel-search">
        <select id="source-select"><option value="">All Sources</option></select>
        <input id="show-hidden" type="checkbox">
        <button id="toggle-groups"></button>
        <div id="channel-language-filter"></div>
        <div id="channel-list-status"></div>
        <div id="context-menu"></div>
        <div id="channel-list"></div>
    `, { url: 'http://nodecast.test/', runScripts: 'outside-only', pretendToBeVisual: true });
    const { window } = dom;
    window.IntersectionObserver = class { observe() {} disconnect() {} };
    window.eval(script('js/icons.js'));
    window.eval(script('js/services/channelLanguageDetection.js'));
    window.eval(script('js/services/channelLanguageFusion.js'));
    window.eval(script('js/services/channelVariantGrouping.js'));
    window.eval(script('js/services/layaStatusPresentation.js'));
    window.eval(script('js/services/liveChannelProjection.js'));
    window.eval(`${script('js/components/ChannelList.js')}\nwindow.ChannelList = ChannelList;`);
    window.app = {
        player: { settings: { liveChannelListMode: 'flat', languageDetectionMode: 'algo' } },
        epgGuide: { getCurrentProgram: () => null, loadError: null }
    };
    const channelList = new window.ChannelList();
    channelList.sources = [{ id: 1, type: 'xtream', name: 'Fixture source', enabled: true }];
    return { dom, window, channelList };
}

test('full refresh analyzeAll runs Laya language detection after identity and persists recalculated languages', async () => {
    const db = createDb();
    seedLive(db, 'bein-east', 'beIN Sports 1 East');
    seedLive(db, 'bein-west', 'beIN Sports 1 West');

    const order = [];
    const languagePayloads = [];
    const layaClient = {
        identityHintBatch: async pairs => {
            order.push('identity');
            return pairs.map(pair => ({
                id: pair.id,
                sameIdentityProbability: 0.9,
                confidence: 0.9,
                family: 'bein sports',
                number: '1'
            }));
        },
        detectBatch: async payload => {
            order.push('language');
            languagePayloads.push(payload);
            return {
                results: payload.items.map(item => ({
                    id: item.id,
                    language: 'fr',
                    confidence: 0.97
                }))
            };
        }
    };

    try {
        await liveProjection.rebuildWithSignals(db, { mode: 'laya', layaClient, analyzeAll: true });
        const rows = db.prepare(`
            SELECT id, language_code, language_detector, language_confidence
            FROM playlist_items
            WHERE type = 'live'
            ORDER BY id
        `).all();

        assert.deepEqual(order, ['identity', 'language']);
        assert.equal(languagePayloads.length, 1);
        assert.deepEqual(rows.map(row => row.language_code), ['fr', 'fr']);
        assert.deepEqual(rows.map(row => row.language_detector), ['laya', 'laya']);
        assert.ok(rows.every(row => Number(row.language_confidence) === 0.97));
    } finally {
        db.close();
    }
});

test('search result variant expansion uses logicalChannelId and lists the currently selected stream', async () => {
    const { dom, window, channelList } = createChannelListDom();
    let variantsRequestedFor = null;

    window.API = {
        live: {
            getChannels: async options => {
                assert.equal(options.q, 'bein sports 1');
                return {
                    projection: { stale: false },
                    filters: { availableLanguages: [{ code: 'fr', short: 'FR', label: 'French' }] },
                    channels: [{
                        id: 'logical:bein-sports-1:fr',
                        logicalChannelId: 'logical:bein-sports-1',
                        displayName: 'beIN Sports 1',
                        language: { code: 'fr', short: 'FR', label: 'French', confidence: 97 },
                        selectedVariantId: '1:bein-4k',
                        variantCount: 3,
                        variants: [{
                            id: 'bein-hd',
                            sourceId: 1,
                            name: 'beIN Sports 1 HD',
                            categoryName: 'Sports',
                            isHidden: false,
                            language: { code: 'fr', short: 'FR', label: 'French', confidence: 97 }
                        }]
                    }]
                };
            },
            getChannelVariants: async logicalChannelId => {
                variantsRequestedFor = logicalChannelId;
                if (logicalChannelId !== 'logical:bein-sports-1') return { variants: [], page: { hasMore: false } };
                return {
                    page: { hasMore: false },
                    variants: [
                        { id: 'bein-hd', sourceId: 1, name: 'beIN Sports 1 HD', categoryName: 'Sports', isHidden: false },
                        { id: 'bein-4k', sourceId: 1, name: 'beIN Sports 1 4K', categoryName: 'Sports', isHidden: false },
                        { id: 'bein-backup', sourceId: 1, name: 'beIN Sports 1 Backup', categoryName: 'Sports', isHidden: false }
                    ]
                };
            }
        }
    };

    try {
        channelList.searchInput.value = 'bein sports 1';
        await channelList.loadChannels();

        const toggle = window.document.querySelector('.variant-toggle');
        assert.ok(toggle, 'search result should expose a stream list toggle');
        toggle.dispatchEvent(new window.MouseEvent('click', { bubbles: true }));
        await wait(20);

        assert.equal(variantsRequestedFor, 'logical:bein-sports-1');
        assert.match(channelList.container.textContent, /beIN Sports 1 4K/);
        const playing = channelList.container.querySelector('.variant-playing-badge');
        assert.equal(playing?.textContent, 'Playing');
        assert.equal(playing?.closest('.channel-variant')?.dataset.variantId, 'bein-4k');
    } finally {
        dom.window.close();
    }
});