// ==UserScript==
// @name         YouTube 自動スキップスクリプト
// @namespace    http://tampermonkey.net/
// @version      2.0
// @description  指定の動画で休憩パートを自動スキップする
// @author       れいけん
// @match        https://www.youtube.com/watch*
// @icon         https://www.youtube.com/favicon.ico
// @grant        none
// ==/UserScript==

(function () {
    'use strict';

    // ============================================================
    //  ★ 設定エリア ここだけ編集すればOK
    // ============================================================

    const TARGET_VIDEO_ID = '_SCd8LV3Eww';

    // スキップ設定
    // { from: 'H:MM:SS', to: 'H:MM:SS' } の形式で何個でも追加・削除できます
    const SKIPS = [
        { from: '1:55:19', to: '2:22:17' },
        { from: '4:20:26', to: '4:47:24' },
        // { from: '6:00:00', to: '6:30:00' },  // ← こんな感じで追加
    ];

    // ============================================================
    //  以下は編集不要
    // ============================================================

    function toSec(str) {
        const parts = str.split(':').map(Number);
        if (parts.length === 3) return parts[0] * 3600 + parts[1] * 60 + parts[2];
        if (parts.length === 2) return parts[0] * 60 + parts[1];
        return parts[0];
    }

    const SKIP_LIST = SKIPS.map(sk => ({
        from: toSec(sk.from),
        to: toSec(sk.to),
        label: sk.from + ' → ' + sk.to,
    }));

    const TOLERANCE = 2;
    let video = null;
    let skipped = SKIP_LIST.map(() => false);
    let indicator = null;

    function getVideoId() {
        return new URLSearchParams(window.location.search).get('v');
    }

    function createIndicator() {
        if (indicator) return;
        indicator = document.createElement('div');
        Object.assign(indicator.style, {
            position: 'fixed',
            bottom: '80px',
            right: '20px',
            background: 'rgba(0,0,0,0.78)',
            color: '#fff',
            padding: '8px 14px',
            borderRadius: '8px',
            fontSize: '13px',
            zIndex: '9999',
            pointerEvents: 'none',
            opacity: '0',
            transition: 'opacity 0.3s',
            maxWidth: '280px',
            lineHeight: '1.6',
            whiteSpace: 'pre-line',
        });
        document.body.appendChild(indicator);
    }

    function showIndicator(msg, duration) {
        if (!indicator) createIndicator();
        indicator.textContent = msg;
        indicator.style.opacity = '1';
        clearTimeout(indicator._t);
        indicator._t = setTimeout(() => { indicator.style.opacity = '0'; }, duration || 3500);
    }

    function startWatching() {
        video = document.querySelector('video');
        if (!video) { setTimeout(startWatching, 1000); return; }

        createIndicator();
        showIndicator('⏱ 休憩スキップ: 有効\n設定数: ' + SKIP_LIST.length + ' 個', 4000);

        video.addEventListener('timeupdate', () => {
            if (getVideoId() !== TARGET_VIDEO_ID) return;
            const cur = video.currentTime;
            SKIP_LIST.forEach((sk, i) => {
                if (!skipped[i] && cur >= sk.from && cur < sk.from + TOLERANCE) {
                    skipped[i] = true;
                    video.currentTime = sk.to;
                    showIndicator('⏭ スキップ ' + (i + 1) + '\n' + sk.label, 4000);
                }
                if (cur < sk.from - 10) skipped[i] = false;
            });
        });
    }

    function reset() {
        video = null;
        skipped = SKIP_LIST.map(() => false);
        indicator = null;
    }

    function init() {
        if (getVideoId() !== TARGET_VIDEO_ID) return;
        startWatching();
    }

    let lastUrl = location.href;
    new MutationObserver(() => {
        if (location.href !== lastUrl) {
            lastUrl = location.href;
            reset();
            setTimeout(init, 1500);
        }
    }).observe(document.body, { childList: true, subtree: true });

    init();
})();