// ==UserScript==
    // @name         YouTube Enhanced Player
    // @name:en      YouTube Enhanced Player
    // @name:es      YouTube Reproductor Mejorado
    // @namespace    http://tampermonkey.net/
    // @version      1.6.3
    // @description  Запоминает позицию просмотра видео и возобновляет с этого места (минус 5 секунд), сохраняет выбранную громкость
    // @description:en Remembers video playback position and resumes from that point (minus 5 seconds), saves selected volume
    // @description:es Recuerda la posición de reproducción y continúa desde ese punto (menos 5 segundos), guarda el volumen seleccionado
    // @author       YourName
    // @match        https://www.youtube.com/*
    // @grant        none
    // @icon         https://img.icons8.com/?size=100&id=55200&format=png&color=000000
    // @license      MIT
    // ==/UserScript==

    (function() {
        'use strict';

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

        function saveVideoTime(videoId, currentTime) {
            localStorage.setItem(`yt_time_${videoId}`, currentTime.toString());
        }

        function loadVideoTime(videoId) {
            const savedTime = localStorage.getItem(`yt_time_${videoId}`);
            return savedTime ? parseFloat(savedTime) : 0;
        }

        function saveVolume(volume) {
            localStorage.setItem('yt_volume', volume.toString());
        }

        function loadVolume() {
            const savedVolume = localStorage.getItem('yt_volume');
            return savedVolume ? parseInt(savedVolume, 10) : 100;
        }

        function showSaveNotification() {
            const overlay = document.querySelector('.html5-video-player .ytp-player-content')
                         || document.querySelector('.ytp-chrome-top')
                         || document.body;

            if (getComputedStyle(overlay).position === 'static') {
                overlay.style.position = 'relative';
            }

            const old = overlay.querySelector('.timeSaveNotification');
            if (old) old.remove();

            const notif = document.createElement('div');
            notif.className = 'timeSaveNotification';
            Object.assign(notif.style, {
                position: 'absolute',
                bottom: '0px',
                right: '5px',
                background: 'rgba(0,0,0,0.7)',
                color: '#fff',
                padding: '5px 10px',
                borderRadius: '5px',
                zIndex: '9999',
                fontSize: '14px',
                opacity: '0',
                transition: 'opacity 0.5s ease',
            });
            notif.innerText = 'Время просмотра сохранено!';
            overlay.appendChild(notif);

            requestAnimationFrame(() => notif.style.opacity = '1');
            setTimeout(() => {
                notif.style.opacity = '0';
                setTimeout(() => notif.remove(), 500);
            }, 3000);
        }

        function initResumePlayback() {
            const video = document.querySelector('video');
            if (!video) return;

            const videoId = getVideoId();
            if (!videoId) return;

            const savedTime = loadVideoTime(videoId);
            if (savedTime > 0) {
                const resumeTime = Math.max(0, savedTime - 5);
                video.currentTime = resumeTime;
            }

            setInterval(() => {
                if (!video.paused) {
                    const videoId = getVideoId();
                    if (videoId) {
                        saveVideoTime(videoId, video.currentTime);
                    }
                }
            }, 5000);

            window.addEventListener('beforeunload', () => {
                const videoId = getVideoId();
                if (videoId) {
                    saveVideoTime(videoId, video.currentTime);
                }
            });
        }

        function calculateVolume(position, sliderMax) {
            const volume = (position / sliderMax) * 1400;
            return volume.toFixed();
        }

        function updateVolumeDisplay(volume) {
            const old = document.getElementById('customVolumeDisplay');
            if (old) old.remove();

            const btn = document.getElementById('volumeBoostButton');
            if (!btn) return;

            const volumeDisplay = document.createElement('div');
            volumeDisplay.id = 'customVolumeDisplay';
            volumeDisplay.innerText = `${volume}%`;

            Object.assign(volumeDisplay.style, {
                position: 'absolute',
                fontSize: '14px',
                background: 'rgba(0,0,0,0.8)',
                color: '#fff',
                borderRadius: '5px',
                whiteSpace: 'nowrap',
                padding: '2px 6px',
                pointerEvents: 'none',
                transition: 'opacity 0.3s ease, transform 0.3s ease',
                opacity: '0',
                transform: 'translate(-50%, -10px)',
            });

            const btnContainer = btn.parentElement;
            btnContainer.style.position = 'relative';
            btnContainer.appendChild(volumeDisplay);

            const btnRect = btn.getBoundingClientRect();
            const containerRect = btnContainer.getBoundingClientRect();
            const offsetX = btnRect.left - containerRect.left + btnRect.width / 2;
            const offsetY = btnRect.top - containerRect.top;

            volumeDisplay.style.left = `${offsetX}px`;
            volumeDisplay.style.top = `${offsetY}px`;

            requestAnimationFrame(() => {
                volumeDisplay.style.opacity = '1';
                volumeDisplay.style.transform = 'translate(-50%, -20px)';
            });

            setTimeout(() => {
                volumeDisplay.style.opacity = '0';
                volumeDisplay.style.transform = 'translate(-50%, -10px)';
                setTimeout(() => volumeDisplay.remove(), 300);
            }, 1000);
        }

        function createControlPanel(video) {
            const videoId = getVideoId();
            if (!videoId) return;

            const style = document.createElement('style');
            style.textContent = `
            #volumeBoostButton input[type=range] {
                -webkit-appearance: none;
                width: 100px;
                height: 4px;
                background: #ccc;
                borderRadius: 2px;
                outline: none;
            }
            #volumeBoostButton input[type=range]::-webkit-slider-thumb {
                -webkit-appearance: none;
                appearance: none;
                width: 12px;
                height: 12px;
                borderRadius: 50%;
                background: #fff;
                cursor: pointer;
                box-shadow: 0 0 2px rgba(0, 0, 0, 0.6);
            }`;
            document.head.appendChild(style);

            const saveButton = document.createElement('button');
            saveButton.id = 'manualSaveButton';
            saveButton.innerText = '💾';
            Object.assign(saveButton.style, {
                background: 'none',
                border: 'none',
                cursor: 'pointer',
                color: '#fff',
                fontWeight: 'bold',
                marginRight: '1px',
                fontSize: '18px',
                transition: 'transform 0.2s ease',
            });
            saveButton.title = 'Сохранить текущее время просмотра';

            saveButton.addEventListener('click', () => {
                saveVideoTime(videoId, video.currentTime);
                showSaveNotification();
            });

            const volumeBoostButton = document.createElement('button');
            volumeBoostButton.id = 'volumeBoostButton';
            volumeBoostButton.innerText = '🔊';
            Object.assign(volumeBoostButton.style, {
                background: 'none',
                border: 'none',
                cursor: 'pointer',
                color: '#fff',
                fontWeight: 'bold',
                marginRight: '1px',
                fontSize: '18px',
                transition: 'transform 0.2s ease',
            });
            volumeBoostButton.title = 'Усилитель громкости';

            const customVolumeSlider = document.createElement('input');
            Object.assign(customVolumeSlider, {
                type: 'range',
                min: '100',
                max: '1400',
                step: '1',
                value: loadVolume(), // Загружаем сохраненное значение громкости
            });
            Object.assign(customVolumeSlider.style, {
                display: 'none',
                opacity: '0',
                transform: 'scale(0.8)',
                transition: 'opacity 0.3s ease, transform 0.3s ease',
            });

            const audioContext = new (window.AudioContext || window.webkitAudioContext)();
            const gainNode = audioContext.createGain();
            gainNode.connect(audioContext.destination);
            const videoSource = audioContext.createMediaElementSource(video);
            videoSource.connect(gainNode);
            gainNode.gain.value = loadVolume() / 100; // Устанавливаем начальную громкость

            customVolumeSlider.addEventListener('input', function() {
                const volume = calculateVolume(this.value, this.max);
                gainNode.gain.value = volume / 100;
                updateVolumeDisplay(volume);
                saveVolume(volume); // Сохраняем громкость
            });

            function resetVolumeTo100() {
                customVolumeSlider.value = '100';
                gainNode.gain.value = 1.0;
                updateVolumeDisplay('100');
                saveVolume('100'); // Сохраняем сброшенное значение
            }

            volumeBoostButton.addEventListener('mouseenter', () => {
                customVolumeSlider.style.display = 'block';
                requestAnimationFrame(() => {
                    customVolumeSlider.style.opacity = '1';
                    customVolumeSlider.style.transform = 'scale(1)';
                });
            });

            volumeBoostButton.addEventListener('click', (e) => {
                e.stopPropagation();
                resetVolumeTo100();
            });

            let hideTimeout;

            const sliderContainer = document.createElement('div');
            sliderContainer.style.display = 'flex';
            sliderContainer.style.alignItems = 'center';
            sliderContainer.style.position = 'relative';
            sliderContainer.style.padding = '0px';
            sliderContainer.style.marginLeft = '0px';
            sliderContainer.style.borderRadius = '1px';
            sliderContainer.style.cursor = 'pointer';

            sliderContainer.addEventListener('mouseleave', () => {
                hideTimeout = setTimeout(() => {
                    customVolumeSlider.style.opacity = '0';
                    customVolumeSlider.style.transform = 'scale(0.8)';
                    setTimeout(() => {
                        customVolumeSlider.style.display = 'none';
                    }, 300);
                }, 300);
            });

            sliderContainer.addEventListener('mouseenter', () => {
                clearTimeout(hideTimeout);
            });

            const controls = document.querySelector('.ytp-chrome-controls');
            if (controls) {
                const buttonContainer = document.createElement('div');
                buttonContainer.style.display = 'flex';
                buttonContainer.style.alignItems = 'center';
                buttonContainer.style.marginRight = '10px';

                sliderContainer.appendChild(volumeBoostButton);
                sliderContainer.appendChild(customVolumeSlider);

                buttonContainer.appendChild(saveButton);
                buttonContainer.appendChild(sliderContainer);

                controls.insertBefore(buttonContainer, controls.firstChild);

                sliderContainer.addEventListener('wheel', (e) => {
                    e.preventDefault();
                    const step = 50;
                    let val = parseInt(customVolumeSlider.value, 10);
                    if (e.deltaY < 0) {
                        val = Math.min(val + step, parseInt(customVolumeSlider.max, 10));
                    } else {
                        val = Math.max(val - step, parseInt(customVolumeSlider.min, 10));
                    }
                    customVolumeSlider.value = val;
                    customVolumeSlider.dispatchEvent(new Event('input'));
                });
            }

            updateVolumeDisplay(loadVolume()); // Отображаем начальную громкость
        }

        function init() {
            initResumePlayback();
            const video = document.querySelector('video');
            if (video) createControlPanel(video);
        }

        const checkVideo = setInterval(() => {
            if (document.querySelector('video') && document.querySelector('.ytp-chrome-controls')) {
                clearInterval(checkVideo);
                init();
            }
        }, 500);
    })();