// ==UserScript==
// @name         YouTube double speed, excluding LIVE or brief video(such as music)
// @namespace    https://tangled.org/lamrongol.bsky.social/YouTubeAutoSpeed
// @version      0.1.0
// @description  Auto set YouTube speed fast, but not for LIVE, brief video, AMSR and "歌枠".
// @author       @lamrongol
// @match        https://*.youtube.com/*
// @match        https://m.youtube.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=www.youtube.com
// @license      MIT
// @grant        none
// ==/UserScript==

(function () {
    'use strict';

    const main = _event => {
        if (document.readyState == 'complete') {
            if (document.location.pathname == "/live_chat") return;
            document.removeEventListener('readystatechange', main);

            //https://learn.scriptcat.org/%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98/%E5%B8%B8%E8%A7%81%E8%AF%AF%E5%8C%BA1/
            let ops = document.querySelector("ytd-app");
            let videoFoundUrl = "";
            setTimeout(() => {
                let observer = new MutationObserver(function (_mutations) {
                    if (document.location.pathname != "/watch") return;

                    const video = document.querySelector('video');
                    if (video && video.readyState > 3) {
                        if (document.location.href == videoFoundUrl) return;
                        videoFoundUrl = document.location.href;
                        let isLive = document.querySelector(".ytp-live-badge-is-livehead");

                        let is_long = false;
                        if (!isLive) {
                            const span_list = document.getElementsByClassName("ytp-time-duration");
                            if (span_list) {
                                const span = span_list[0];
                                const time = span.innerText;//e.g. "1:47:01"
                                const list = time.split(":");
                                if (list.length == 1) {
                                    is_long = false;
                                } else if (list.length > 2) {
                                    is_long = true;
                                } else {
                                    const minutes = Number(list[0]);
                                    is_long = minutes > 5;
                                }
                            }
                        }
                        let player = document.getElementById("movie_player");
                        let video_main = player.querySelector('video.html5-main-video');
                        let video_name = document.querySelector("yt-formatted-string").getAttribute("title");


                        if (!is_long || isLive || video_name.includes("ASMR") || video_name.includes("歌枠")) {
                            player.setPlaybackRate(1.0);
                            video_main.playbackRate = 1.0;
                        } else {
                            player.setPlaybackRate(2.0);
                            video_main.playbackRate = 2.0;
                        }
                    }
                });

                observer.observe(ops, { childList: true, subtree: true });
            }, 500);
        }
    }
    document.addEventListener('readystatechange', main);
})();