// ==UserScript==
// @name               Auto Skip YouTube Ads
// @name:zh-CN         自动跳过 YouTube 广告
// @namespace          https://github.com/oxol/userscripts
// @version            1.0
// @description        Automatically skip YouTube ads instantly.
// @description:zh-CN  立即自动跳过 YouTube 广告。
// @author             oxol
// @match              https://www.youtube.com/*
// @match              https://m.youtube.com/*
// @match              https://music.youtube.com/*
// @exclude            https://studio.youtube.com/*
// @grant              none
// @license            MIT
// @compatible         firefox
// @compatible         chrome
// @compatible         opera
// @compatible         safari
// @compatible         edge
// @noframes
// ==/UserScript==

function skipAd() {
    if (checkIsYouTubeShorts()) return

    const adShowing = document.querySelector('.ad-showing')

    const pieCountdown = document.querySelector('.ytp-ad-timed-pie-countdown-container')

    const surveyQuestions = document.querySelector('.ytp-ad-survey-questions')

    if (adShowing === null && pieCountdown === null && surveyQuestions === null) return

    const moviePlayerEl = document.querySelector('#movie_player')
    let playerEl
    let player

    if (isYouTubeMobile || isYouTubeMusic) {
        playerEl = moviePlayerEl
        player = playerEl
    } else {
        playerEl = document.querySelector('#ytd-player')
        player = playerEl && playerEl.getPlayer()
    }

    if (playerEl === null || player === null) {
        console.log({
            message: 'Player not found',
            timeStamp: getCurrentTimeString()
        })
        return
    }

    let adVideo = null

    if (pieCountdown === null && surveyQuestions === null) {
        adVideo = document.querySelector(
            '#ytd-player video.html5-main-video, #song-video video.html5-main-video'
        )

        console.table({
            message: 'Ad video',
            video: adVideo !== null,
            src: adVideo?.src,
            paused: adVideo?.paused,
            currentTime: adVideo?.currentTime,
            duration: adVideo?.duration,
            timeStamp: getCurrentTimeString()
        })

        if (adVideo !== null) {
            adVideo.muted = true
        }
        if (adVideo === null || !adVideo.src || adVideo.paused || isNaN(adVideo.duration)) {
            return
        }

        console.log({
            message: 'Ad video has finished loading',
            timeStamp: getCurrentTimeString()
        })
    }

    if (isYouTubeMusic && adVideo !== null) {
        adVideo.currentTime = adVideo.duration

        console.table({
            message: 'Ad skipped',
            timeStamp: getCurrentTimeString(),
            adShowing: adShowing !== null,
            pieCountdown: pieCountdown !== null,
            surveyQuestions: surveyQuestions !== null
        })
    } else {
        const videoData = player.getVideoData()
        const videoId = videoData.video_id
        const start = Math.floor(player.getCurrentTime())

        if (moviePlayerEl !== null && moviePlayerEl.isSubtitlesOn()) {
            window.setTimeout(moviePlayerEl.toggleSubtitlesOn, 1000)
        }

        if ('loadVideoWithPlayerVars' in playerEl) {
            playerEl.loadVideoWithPlayerVars({ videoId, start })
        } else {
            playerEl.loadVideoByPlayerVars({ videoId, start })
        }

        console.table({
            message: 'Ad skipped',
            videoId,
            start,
            title: videoData.title,
            timeStamp: getCurrentTimeString(),
            adShowing: adShowing !== null,
            pieCountdown: pieCountdown !== null,
            surveyQuestions: surveyQuestions !== null
        })
    }
}

function checkIsYouTubeShorts() {
    return location.pathname.startsWith('/shorts/')
}

function getCurrentTimeString() {
    return new Date().toTimeString().split(' ', 1)[0]
}

function addCss() {
    const adsSelectors = [
        '#player-ads',
        '#panels > ytd-engagement-panel-section-list-renderer[target-id="engagement-panel-ads"]',
        '#masthead-ad',
        '.yt-mealbar-promo-renderer',
        '.ytp-featured-product',
        'ytd-merch-shelf-renderer',
        'ytmusic-mealbar-promo-renderer',
        'ytmusic-statement-banner-renderer'
    ]
    const adsSelector = adsSelectors.join(',')
    const css = `${adsSelector} { display: none !important; }`
    const style = document.createElement('style')
    style.textContent = css
    document.head.appendChild(style)
}

function removeAdElements() {
    const adSelectors = [
        ['ytd-reel-video-renderer', '.ytd-ad-slot-renderer']
    ]
    for (const adSelector of adSelectors) {
        const adEl = document.querySelector(adSelector[0])
        if (adEl === null) continue
        const neededEl = adEl.querySelector(adSelector[1])
        if (neededEl === null) continue
        adEl.remove()
    }
}

const isYouTubeMobile = location.hostname === 'm.youtube.com'
const isYouTubeDesktop = !isYouTubeMobile

const isYouTubeMusic = location.hostname === 'music.youtube.com'
const isYouTubeVideo = !isYouTubeMusic

addCss()

if (isYouTubeVideo) {
    window.setInterval(removeAdElements, 1000)
    removeAdElements()
}

window.setInterval(skipAd, 500)
skipAd()