// Regression checks for channel navigation, single start, controls and cancellation.
const fs = require('node:fs');
const vm = require('node:vm');
const assert = require('node:assert/strict');
const listeners = {}, documentListeners = {}, elements = [];
let clock = 0, interval, starts = 0, stops = 0, osd = 0, returned = 0, readyState = 0, remote = false;
let policy = { IsEnigmaChannel: true, PreferH264: true }, policyCalls = 0, policyError = false;
const profile = { DirectPlayProfiles: [{ Type: 'Video', VideoCodec: 'av1,h264' }],
    TranscodingProfiles: [{ Type: 'Video', Context: 'Streaming', VideoCodec: 'av1,h264', AudioCodec: 'aac', Protocol: 'hls', MaxWidth: 1920 },
        { Type: 'Video', Context: 'Streaming', VideoCodec: 'av1', AudioCodec: 'aac', Protocol: 'hls' },
        { Type: 'Audio', AudioCodec: 'aac', Protocol: 'http' }], CodecProfiles: [{ Type: 'Video', Codec: 'h264', Conditions: [{ Property: 'Width', Value: '1920' }] }] };
const pending = [];
const location = { hash: '#/livetv', pathname: '/web/index.html', search: '', replace(value) { this.hash = value; } };
const document = {
    fullscreenElement: null,
    body: { append(element) { elements.push(element); } },
    createElement() { return { style: {}, remove() { elements.splice(elements.indexOf(this), 1); } }; },
    querySelector() { return { readyState, currentTime: 0 }; },
    addEventListener(name, callback) { documentListeners[name] = callback; }
};
const window = {
    ApiClient: { getCurrentUserId: () => 'user', serverId: () => 'server', getItem: async (user, id) => ({ Id: id, Type: 'TvChannel' }),
        getUrl: (path, params) => path + '?' + new URLSearchParams(params),
        ajax: async () => { ++policyCalls; if (policyError) throw Error('offline'); return policy; } },
    addEventListener(name, callback) { listeners[name] = callback; }
};
const context = {
    window, document, location, console, URLSearchParams,
    history: { replaceState(a, b, url) { location.hash = url.slice(url.indexOf('#')); } },
    Date: { now: () => clock }, setTimeout, clearTimeout,
    setInterval(callback) { interval = callback; return callback; },
    clearInterval(callback) { if (interval === callback) interval = null; }
};
const manager = {
    getCurrentPlayer: () => ({ isLocalPlayer: !remote }),
    play() { ++starts; return new Promise(resolve => pending.push(resolve)); },
    stop: async () => { ++stops; }
};
const flush = async () => { for (let i = 0; i < 8; i++) await Promise.resolve(); };
(async () => {
    vm.runInNewContext(fs.readFileSync(__dirname + '/web/decoder-channel-playback.js', 'utf8'), context);
    const Plugin = await window.DecoderChannelPlayback();
    const appHost = { getDeviceProfile: async () => profile };
    const dependencies = { playbackManager: manager, appHost, toast() {}, loading: { hide() {} }, events: { on() {} },
        appRouter: { showVideoOsd: async () => { ++osd; }, show: async () => { ++returned; location.hash = '#/livetv?tab=2'; } } };
    new Plugin(dependencies);
    const channel = { Id: 'channel', Type: 'TvChannel', ServerId: 'server' };
    const before = JSON.stringify(profile);
    const changed = await appHost.getDeviceProfile(channel, {});
    assert.notEqual(changed, profile); assert.equal(JSON.stringify(profile), before, 'shared profile must not mutate');
    assert.equal(changed.TranscodingProfiles.length, 2); assert.equal(changed.TranscodingProfiles[0].VideoCodec, 'h264');
    assert.equal(changed.TranscodingProfiles[0].MaxWidth, 1920); assert.equal(changed.TranscodingProfiles[0].AudioCodec, 'aac');
    assert.equal(JSON.stringify(changed.DirectPlayProfiles), JSON.stringify(profile.DirectPlayProfiles));
    assert.equal(JSON.stringify(changed.CodecProfiles), JSON.stringify(profile.CodecProfiles));
    let count = policyCalls;
    assert.equal(await appHost.getDeviceProfile({ Type: 'Movie' }, {}), profile); assert.equal(policyCalls, count);
    assert.equal(await appHost.getDeviceProfile({ ...channel, ServerId: 'other' }, {}), profile); assert.equal(policyCalls, count);
    remote = true; assert.equal(await appHost.getDeviceProfile(channel, {}), profile); assert.equal(policyCalls, count); remote = false;
    window.NativeShell = {}; assert.equal(await appHost.getDeviceProfile(channel, {}), profile); assert.equal(policyCalls, count); delete window.NativeShell;
    policy = { IsEnigmaChannel: false, PreferH264: true }; assert.equal(await appHost.getDeviceProfile(channel, {}), profile);
    policy = { IsEnigmaChannel: true, PreferH264: false }; assert.equal(await appHost.getDeviceProfile(channel, {}), profile);
    policyError = true; assert.equal(await appHost.getDeviceProfile(channel, {}), profile); policyError = false;
    policy = { IsEnigmaChannel: true, PreferH264: true };
    count = policyCalls; await appHost.getDeviceProfile(channel, {}); assert.equal(policyCalls, count + 1, 'retry refreshes current policy');
    const wrapped = appHost.getDeviceProfile; new Plugin(dependencies); assert.equal(appHost.getDeviceProfile, wrapped, 'one profile wrapper per appHost');
    console.log('PASS scoped H264 policy, clone, audio/conditions/direct play preserved, movies/other sources/native/remote bypass, disabled/failing policy, retry and dedup');
    assert.equal(location.hash, '#/livetv?tab=2');
    location.hash = '#/livetv?tab=0'; listeners.hashchange();
    assert.equal(location.hash, '#/livetv?tab=0');
    const click = () => documentListeners.click({ button: 0, target: { closest: () => ({ closest: () => ({ dataset: { id: 'channel', serverid: 'server' } }) }) }, preventDefault() {}, stopImmediatePropagation() {} });
    click(); click(); await flush();
    assert.equal(starts, 1); assert.equal(elements[0].id, 'decoderPlaybackExit');
    interval(); await flush(); assert.equal(osd, 0, 'OSD must wait for actual video metadata');
    readyState=1;interval(); await flush(); assert.equal(osd, 1);
    listeners.keydown({ key: 'Escape', preventDefault() {}, stopImmediatePropagation() {} });
    await flush(); assert.equal(stops, 1); assert.equal(returned, 1); assert.equal(elements.length, 0);
    click(); await flush(); assert.equal(starts, 2);
    pending[0](); await flush(); assert.equal(stops, 1, 'late old completion must not stop the new channel');
    clock = 35000; interval(); await flush();
    assert.equal(stops, 1, 'pending startup must survive 35 seconds');
    assert.equal(returned, 1); assert.equal(elements.length, 1, 'cancel control remains available during slow startup');
    clock = 45001; interval(); await flush();
    assert.equal(stops, 2); assert.equal(returned, 2); assert.equal(elements.length, 0);
    pending[1](); await flush();
    console.log('PASS default channels, explicit programmes, one start, native OSD, Escape, late completion and startup timeout');
})().catch(error => { console.error(error); process.exitCode = 1; });