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 root = path.resolve(__dirname, '..');

function readPublicScript(relativePath, exposeGlobal = '') {
    const source = fs.readFileSync(path.join(root, 'public', relativePath), 'utf8');
    return exposeGlobal ? `${source}\nwindow.${exposeGlobal} = ${exposeGlobal};` : source;
}

function createDom() {
    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" type="button"></button>
        <div id="context-menu"></div>
        <div id="channel-list"></div>

        <button type="button" id="live-analysis-button">Analyze channels</button>
        <div id="live-analysis-status" role="status"></div>
        <div id="live-analysis-progress" hidden>
          <div id="live-analysis-progress-track"><span id="live-analysis-progress-bar"></span></div>
          <div id="live-analysis-progress-text"></div>
        </div>
        <div id="live-analysis-fallback"></div>
        <button type="button" id="live-analysis-details-toggle" hidden></button>
        <pre id="live-analysis-error-details" hidden></pre>
    `, {
        url: 'http://nodecast.test/',
        runScripts: 'outside-only',
        pretendToBeVisual: true
    });
    const { window } = dom;
    window.clearInterval = window.clearInterval.bind(window);
    window.IntersectionObserver = class {
        observe() {}
        disconnect() {}
    };
    window.console = console;
    window.eval(readPublicScript('js/icons.js'));
    window.eval(readPublicScript('js/services/channelLanguageDetection.js'));
    window.eval(readPublicScript('js/services/channelLanguageFusion.js'));
    window.eval(readPublicScript('js/services/channelVariantGrouping.js'));
    window.eval(readPublicScript('js/services/liveChannelProjection.js'));
    window.eval(readPublicScript('js/services/layaStatusPresentation.js'));
    window.eval(readPublicScript('js/services/liveAnalysisPresentation.js'));
    window.eval(readPublicScript('js/components/ChannelList.js', 'ChannelList'));
    window.eval(readPublicScript('js/pages/Settings.js', 'SettingsPage'));
    return {
        window
    };
}

function projectedChannels() {
    return {
        projection: { status: 'success', stale: false },
        channels: [{
            id: 'logical:sports-one',
            fingerprint: 'sports one',
            displayName: 'Sports One',
            variants: [
                {
                    id: 'fr-sd',
                    sourceId: 1,
                    name: '|FR| Sports One SD',
                    groupTitle: 'Sports France',
                    categoryName: 'Sports France',
                    streamIcon: 'fr.png',
                    streamUrl: 'https://streams.test/fr-sd.m3u8',
                    tvgId: 'sports.one.fr',
                    isFavorite: true,
                    isHidden: false
                },
                {
                    id: 'en-4k',
                    sourceId: 1,
                    name: '|UK| Sports One 4K',
                    groupTitle: 'UK Sports',
                    categoryName: 'UK Sports',
                    streamIcon: 'en.png',
                    streamUrl: 'https://streams.test/en-4k.m3u8',
                    tvgId: 'sports.one.uk',
                    isFavorite: false,
                    isHidden: false
                }
            ]
        }]
    };
}

test('user analysis click keeps visible channels after Local AI language failure', async () => {
    const { window } = createDom();
    let rebuildClicked = 0;
    let layaBatchCalls = 0;
    let channelLoads = 0;
    const consoleWarnings = [];
    window.console = {
        ...console,
        warn: (...args) => {
            consoleWarnings.push(args.join(' '));
            console.warn(...args);
        }
    };
    window.API = {
        live: {
            getChannels: async () => {
                channelLoads += 1;
                return projectedChannels();
            },
            rebuildProjection: async () => {
                rebuildClicked += 1;
                return { projection: { status: 'building', processed: 0, total: 2 } };
            },
            getProjectionStatus: async () => ({ status: 'success', processed: 2, total: 2, projectedCount: 1 })
        },
        laya: {
            getStatus: async () => ({ modelPresent: true, runtimeAvailable: true }),
            detectLanguages: async () => {
                layaBatchCalls += 1;
                throw new Error('simulated local AI language failure');
            }
        }
    };

    const app = {
        player: {
            settings: { liveChannelListMode: 'grouped', languageDetectionMode: 'algo' },
            saveSettings() {}
        },
        epgGuide: null,
        navigateTo() {},
        pages: { settings: { switchTab() {} } }
    };
    window.app = app;
    const channelList = new window.ChannelList();
    channelList.sources = [{ id: 1, type: 'm3u', name: 'Fixture Provider' }];
    app.channelList = channelList;

    await channelList.loadChannels();
    channelList.expandAll();
    const beforeNames = [...window.document.querySelectorAll('.channel-name')].map(item => item.textContent);
    assert.deepEqual(beforeNames, ['Sports One', 'Sports One']);
    assert.equal(window.document.querySelector('.empty-state'), null);

    app.player.settings.languageDetectionMode = 'hybrid';
    const settingsPage = Object.create(window.SettingsPage.prototype);
    settingsPage.app = app;
    settingsPage.initLiveAnalysis();
    await Promise.resolve();

    window.document.getElementById('live-analysis-button').click();
    assert.equal(rebuildClicked, 1);
    await new Promise(resolve => setTimeout(resolve, 1100));
    channelList.expandAll();
    window.clearInterval(channelList._epgRefreshTimer);
    window.clearInterval(settingsPage.liveAnalysisPollTimer);

    const notice = window.document.querySelector('.laya-language-notice');
    const afterNames = [...window.document.querySelectorAll('.channel-name')].map(item => item.textContent);
    const languageBadges = [...window.document.querySelectorAll('.variant-language')].map(item => item.textContent);
    const groupNames = [...window.document.querySelectorAll('.group-name')].map(item => item.textContent);

    assert.equal(channelLoads, 2);
    assert.equal(layaBatchCalls, 1);
    assert.ok(notice);
    assert.match(notice.textContent, /Local AI language detection failed/);
    assert.deepEqual(afterNames, ['Sports One', 'Sports One']);
    assert.deepEqual([...new Set(languageBadges)].sort(), ['EN 100%', 'FR 100%']);
    assert.deepEqual(groupNames, ['Favorites', 'Sports France']);
    assert.equal(window.document.querySelector('.empty-state'), null);
    assert.equal(window.document.querySelector('#channel-list > .loading'), null);
    assert.equal(channelList.languageDetectionFallback, true);
    assert.equal(channelList.logicalChannels[0].variants.length, 2);
    assert.ok(consoleWarnings.some(line => line.includes('Local AI language detection unavailable')));
});

test('analysis click does not replace visible channels with an empty successful projection', async () => {
    const { window } = createDom();
    let rebuildClicked = 0;
    let channelLoads = 0;
    window.API = {
        live: {
            getChannels: async () => {
                channelLoads += 1;
                if (channelLoads === 1) return projectedChannels();
                return {
                    projection: {
                        status: 'success',
                        stale: false,
                        projectedCount: 0,
                        processed: 3,
                        total: 3
                    },
                    channels: []
                };
            },
            rebuildProjection: async () => {
                rebuildClicked += 1;
                return { projection: { status: 'building', processed: 0, total: 3 } };
            },
            getProjectionStatus: async () => ({ status: 'success', processed: 3, total: 3, projectedCount: 0 })
        },
        laya: {
            getStatus: async () => ({ modelPresent: true, runtimeAvailable: true }),
            detectLanguages: async () => {
                throw new Error('simulated local AI language failure');
            }
        }
    };

    const app = {
        player: {
            settings: { liveChannelListMode: 'grouped', languageDetectionMode: 'hybrid' },
            saveSettings() {}
        },
        epgGuide: null,
        navigateTo() {},
        pages: { settings: { switchTab() {} } }
    };
    window.app = app;
    const channelList = new window.ChannelList();
    channelList.sources = [{ id: 1, type: 'm3u', name: 'Fixture Provider', enabled: true }];
    app.channelList = channelList;

    await channelList.loadChannels();
    channelList.expandAll();
    const beforeNames = [...window.document.querySelectorAll('.channel-name')].map(item => item.textContent);
    assert.deepEqual(beforeNames, ['Sports One', 'Sports One']);
    assert.equal(window.document.querySelector('.empty-state'), null);
    assert.equal(channelLoads, 1);

    const settingsPage = Object.create(window.SettingsPage.prototype);
    settingsPage.app = app;
    settingsPage.initLiveAnalysis();
    await Promise.resolve();

    window.document.getElementById('live-analysis-button').click();
    assert.equal(rebuildClicked, 1);
    await new Promise(resolve => setTimeout(resolve, 1100));
    channelList.expandAll();
    window.clearInterval(channelList._epgRefreshTimer);
    window.clearInterval(settingsPage.liveAnalysisPollTimer);

    const afterNames = [...window.document.querySelectorAll('.channel-name')].map(item => item.textContent);
    const emptyState = window.document.querySelector('.empty-state');
    const loading = window.document.querySelector('#channel-list > .loading');

    assert.equal(channelLoads, 2);
    assert.deepEqual(afterNames, ['Sports One', 'Sports One']);
    assert.equal(emptyState, null);
    assert.equal(loading, null);
    assert.equal(channelList.channels.length, 2);
});