// ==UserScript==
// @name              bilibili favlist hidden video detection
// @name:zh-CN        哔哩哔哩(B站|Bilibili)收藏夹Fix(隐藏视频检测)
// @name:zh-TW        嗶哩嗶哩(B站|Bilibili)收藏夾Fix(隱藏影片檢測)
// @namespace         http://tampermonkey.net/
// @version           3
// @description       detect videos in favlist that only visiable to upper
// @description:zh-CN 检测收藏夹中被up主设置为仅自己可见的视频
// @description:zh-TW 檢測收藏夾中被上傳者設定為僅自己可見的影片
// @author            YTB0710
// @match             https://space.bilibili.com/*
// @connect           api.bilibili.com
// @grant             GM_xmlhttpRequest
// @grant             GM_cookie
// @grant             GM_openInTab
// @grant             GM_setValue
// @grant             GM_getValue
// @downloadURL none
// ==/UserScript==

(function () {
    'use strict';

    const textDictionary = {
        'UPDATES': {
            'zh-CN': '更新内容: 优化脚本部分逻辑',
            'zh-TW': '更新內容: 優化腳本部分邏輯'
        },
        'ENTER_AV_OR_BV_HERE': {
            'zh-CN': '在此输入av号或bv号',
            'zh-TW': '在此輸入av號或bv號'
        },
        'DETECT_HIDDEN_VIDEO_WITH_PROMPT': {
            'zh-CN': '检测隐藏视频(先刷新页面)',
            'zh-TW': '檢測隱藏影片(先重新載入頁面)'
        },
        'GET_VIDEO_INFO_WITH_PROMPT': {
            'zh-CN': '查询视频信息(输入bv号)',
            'zh-TW': '查詢影片資訊(輸入bv號)'
        },
        'REMOVE_VIDEO_WITH_PROMPT': {
            'zh-CN': '取消收藏(输入av号)',
            'zh-TW': '取消收藏(輸入av號)'
        },
        'ADD_VIDEO_WITH_PROMPT': {
            'zh-CN': '添加收藏(输入av号)',
            'zh-TW': '新增收藏(輸入av號)'
        },
        'DETECT_HIDDEN_VIDEO': {
            'zh-CN': '检测隐藏视频',
            'zh-TW': '檢測隱藏影片'
        },
        'GET_VIDEO_INFO': {
            'zh-CN': '查询视频信息',
            'zh-TW': '查詢影片資訊'
        },
        'REMOVE_VIDEO': {
            'zh-CN': '取消收藏',
            'zh-TW': '取消收藏'
        },
        'ADD_VIDEO': {
            'zh-CN': '添加收藏',
            'zh-TW': '新增收藏'
        },
        'AV': {
            'zh-CN': 'av号',
            'zh-TW': 'av號'
        },
        'BV': {
            'zh-CN': 'bv号',
            'zh-TW': 'bv號'
        },
        'ENTER_AV': {
            'zh-CN': '请输入av号',
            'zh-TW': '請輸入av號'
        },
        'ENTER_BV': {
            'zh-CN': '请输入bv号',
            'zh-TW': '請輸入bv號'
        },
        'NO_HIDDEN_VIDEO_ON_THIS_PAGE': {
            'zh-CN': '本页没有隐藏的视频',
            'zh-TW': '本頁沒有隱藏的影片'
        },
        'POSITION_ON_THIS_PAGE_WITH_PROMPT': {
            'zh-CN': '在本页的位置(从1开始)',
            'zh-TW': '在本頁的位置(從1開始)'
        },
        'POSITION_ON_THIS_PAGE': {
            'zh-CN': '在本页的位置',
            'zh-TW': '在本頁的位置'
        },
        'RESPONSE_CONTENT': {
            'zh-CN': 'b站接口响应内容',
            'zh-TW': 'b站介面回應內容'
        },
        'REFRESH_PROMPT': {
            'zh-CN': '如果出现问题, 请刷新页面后重试',
            'zh-TW': '如果出現問題, 請重新載入頁面後再試'
        },
        'ERROR_COOKIE': {
            'zh-CN': '无法读取cookie, 请更新tampermonkey, 前往控制台查看错误信息',
            'zh-TW': '無法讀取cookie, 請更新tampermonkey, 前往控制台查看錯誤資訊'
        }
    };

    const preferredLanguage = getPreferredLanguage();

    const currentVersion = 3;

    const avRegex = /^[1-9]\d*$/;
    const bvRegex = /^BV[A-Za-z0-9]{10}$/;

    const videosPerPage = 20;

    function getPreferredLanguage() {
        const languages = navigator.languages || [navigator.language];
        for (const lang of languages) {
            if (lang === 'zh-CN') {
                return 'zh-CN';
            }
            if (lang === 'zh-TW') {
                return 'zh-TW';
            }
            if (lang === 'zh-HK') {
                return 'zh-TW';
            }
        }
        return 'zh-CN';
    }

    function getText(key) {
        return textDictionary[key][preferredLanguage];
    }

    const checkInterval = setInterval(function () {
        const favSidenav = document.querySelector('.fav-sidenav');
        if (!favSidenav) {
            return;
        }
        clearInterval(checkInterval);

        let version = GM_getValue('version', currentVersion - 1);
        let usageCount = GM_getValue('usageCount', 0);
        const displayUpdate = version < currentVersion ? true : false;
        const displayPrompt = usageCount < 10 ? true : false;
        if (displayUpdate) {
            GM_setValue('version', version + 0.5);
        }
        if (displayPrompt) {
            GM_setValue('usageCount', usageCount + 1);
        }

        const watchLaterLink = favSidenav.querySelector('a.watch-later');
        watchLaterLink.style.borderBottom = '1px solid #eee';

        const controlsContainer = document.createElement('div');
        controlsContainer.classList.add('fix-settings-container');
        controlsContainer.style.borderTop = '1px solid #e4e9f0';
        controlsContainer.style.padding = '2px';
        favSidenav.appendChild(controlsContainer);

        const inputTextContainer = document.createElement('div');
        inputTextContainer.classList.add('fix-inputText-container');
        inputTextContainer.style.padding = '2px';
        controlsContainer.appendChild(inputTextContainer);

        const inputText = document.createElement('input');
        inputText.type = 'text';
        inputText.classList.add('fix-inputText');
        if (displayPrompt) {
            inputText.placeholder = getText('ENTER_AV_OR_BV_HERE');
        }
        inputTextContainer.appendChild(inputText);

        const buttonAContainer = document.createElement('div');
        buttonAContainer.classList.add('fix-button-container');
        buttonAContainer.style.padding = '2px';
        controlsContainer.appendChild(buttonAContainer);

        const buttonA = document.createElement('button');
        buttonA.type = 'button';
        if (displayPrompt) {
            buttonA.innerText = getText('DETECT_HIDDEN_VIDEO_WITH_PROMPT');
        } else {
            buttonA.innerText = getText('DETECT_HIDDEN_VIDEO');
        }
        buttonA.classList.add('fix-action-button');
        buttonA.addEventListener('click', function () {
            removeInfo();
            addInfo(getText('REFRESH_PROMPT'), 10);
            const favNum = parseInt(document.querySelector('.fav-item.cur span.num').innerText, 10);
            const pager = document.querySelector('.be-pager-next');
            let currentPageExpectedNum;
            if (pager && !pager.classList.contains('be-pager-disabled')) {
                currentPageExpectedNum = videosPerPage;
            } else {
                currentPageExpectedNum = favNum % videosPerPage;
            }
            const lis = document.querySelectorAll('ul.fav-video-list li.small-item');
            if (lis.length === currentPageExpectedNum) {
                addInfo(getText('NO_HIDDEN_VIDEO_ON_THIS_PAGE'), 12);
                return;
            }
            const fid = document.querySelector('.fav-item.cur').getAttribute('fid');
            GM_xmlhttpRequest({
                method: 'GET',
                url: `https://api.bilibili.com/x/v3/fav/resource/ids?media_id=${fid}`,
                responseType: 'json',
                onload: function (response) {
                    const datas = response.response.data;
                    let currentPage = 1;
                    if (favNum > 20) {
                        currentPage = parseInt(document.querySelector('.be-pager-item-active').innerText, 10);
                    }
                    const startIndex = (currentPage - 1) * videosPerPage;
                    const currentPageExpectedDatas = datas.slice(startIndex, startIndex + videosPerPage);
                    const currentPageActualBVs = Array.from(lis).map(li => li.getAttribute('data-aid'));
                    const hiddenDatas = currentPageExpectedDatas.filter(data => !currentPageActualBVs.includes(data.bvid));
                    hiddenDatas.forEach(hiddenData => {
                        if (displayPrompt) {
                            addInfo(`${getText('POSITION_ON_THIS_PAGE_WITH_PROMPT')}: ${currentPageExpectedDatas.findIndex(data => data.bvid === hiddenData.bvid) + 1}`, 12);
                        } else {
                            addInfo(`${getText('POSITION_ON_THIS_PAGE')}: ${currentPageExpectedDatas.findIndex(data => data.bvid === hiddenData.bvid) + 1}`, 12);
                        }
                        addInfo(`${getText('AV')}: ${hiddenData.id}`, 12);
                        addInfo(`${getText('BV')}: ${hiddenData.bvid}`, 12);
                    });
                }
            });
        });
        buttonAContainer.appendChild(buttonA);

        const buttonBContainer = document.createElement('div');
        buttonBContainer.classList.add('fix-button-container');
        buttonBContainer.style.padding = '2px';
        controlsContainer.appendChild(buttonBContainer);

        const buttonB = document.createElement('button');
        buttonB.type = 'button';
        if (displayPrompt) {
            buttonB.innerText = getText('GET_VIDEO_INFO_WITH_PROMPT');
        } else {
            buttonB.innerText = getText('GET_VIDEO_INFO');
        }
        buttonB.classList.add('fix-action-button');
        buttonB.addEventListener('click', function () {
            removeInfo();
            const bv = document.querySelector('div.fix-inputText-container input').value;
            if (!bvRegex.test(bv)) {
                addInfo(getText('ENTER_BV'), 12);
                return;
            }
            GM_openInTab(`https://www.biliplus.com/video/${bv}`, { active: true, insert: false, setParent: true });
            GM_openInTab(`https://xbeibeix.com/video/${bv}`, { insert: false, setParent: true });
            GM_openInTab(`https://www.jijidown.com/video/${bv}`, { insert: false, setParent: true });
        });
        buttonBContainer.appendChild(buttonB);

        const buttonCContainer = document.createElement('div');
        buttonCContainer.classList.add('fix-button-container');
        buttonCContainer.style.padding = '2px';
        controlsContainer.appendChild(buttonCContainer);

        const buttonC = document.createElement('button');
        buttonC.type = 'button';
        if (displayPrompt) {
            buttonC.innerText = getText('REMOVE_VIDEO_WITH_PROMPT');
        } else {
            buttonC.innerText = getText('REMOVE_VIDEO');
        }
        buttonC.classList.add('fix-action-button');
        buttonC.addEventListener('click', function () {
            removeInfo();
            GM_cookie.list({ name: 'bili_jct' }, function (cookies, error) {
                if (!error) {
                    const av = document.querySelector('div.fix-inputText-container input').value;
                    if (!avRegex.test(av)) {
                        addInfo(getText('ENTER_AV'), 12);
                        return;
                    }
                    const id = document.querySelector('.fav-item.cur').getAttribute('fid');
                    const csrf = cookies[0].value;
                    const data = `resources=${av}%3A2&media_id=${id}&platform=web&csrf=${csrf}`;
                    GM_xmlhttpRequest({
                        method: 'POST',
                        url: 'https://api.bilibili.com/x/v3/fav/resource/batch-del',
                        data: data,
                        headers: {
                            'Content-Length': `${data.length}`,
                            'Content-Type': 'application/x-www-form-urlencoded'
                        },
                        onload: function (response) {
                            const json = response.response;
                            addInfo(`${getText('RESPONSE_CONTENT')}:`, 12);
                            addInfo(json, 10);
                        }
                    });
                } else {
                    console.error(error);
                    addInfo(getText('ERROR_COOKIE'), 12);
                }
            });
        });
        buttonCContainer.appendChild(buttonC);

        const buttonDContainer = document.createElement('div');
        buttonDContainer.classList.add('fix-button-container');
        buttonDContainer.style.padding = '2px';
        controlsContainer.appendChild(buttonDContainer);

        const buttonD = document.createElement('button');
        buttonD.type = 'button';
        if (displayPrompt) {
            buttonD.innerText = getText('ADD_VIDEO_WITH_PROMPT');
        } else {
            buttonD.innerText = getText('ADD_VIDEO');
        }
        buttonD.classList.add('fix-action-button');
        buttonD.addEventListener('click', function () {
            removeInfo();
            GM_cookie.list({ name: 'bili_jct' }, function (cookies, error) {
                if (!error) {
                    const av = document.querySelector('div.fix-inputText-container input').value;
                    if (!avRegex.test(av)) {
                        addInfo(getText('ENTER_AV'), 12);
                        return;
                    }
                    const id = document.querySelector('.fav-item.cur').getAttribute('fid');
                    const csrf = cookies[0].value;
                    const data = `rid=${av}&type=2&add_media_ids=${id}&csrf=${csrf}`;
                    GM_xmlhttpRequest({
                        method: 'POST',
                        url: 'https://api.bilibili.com/x/v3/fav/resource/deal',
                        data: data,
                        headers: {
                            'Content-Length': `${data.length}`,
                            'Content-Type': 'application/x-www-form-urlencoded'
                        },
                        onload: function (response) {
                            const json = response.response;
                            addInfo(`${getText('RESPONSE_CONTENT')}:`, 12);
                            addInfo(json, 10);
                        }
                    });
                } else {
                    console.error(error);
                    addInfo(getText('ERROR_COOKIE'), 12);
                }
            });
        });
        buttonDContainer.appendChild(buttonD);

        const textContainer = document.createElement('div');
        textContainer.classList.add('fix-text-container');
        textContainer.style.padding = '2px';
        controlsContainer.appendChild(textContainer);

        if (displayUpdate) {
            addInfo(getText('UPDATES', 12));
        }

        function addInfo(info, px) {
            const p = document.createElement('p');
            p.innerText = info;
            p.style.fontSize = `${px}px`;
            textContainer.appendChild(p);
            p.scrollIntoView({ behavior: 'instant', block: 'nearest' });
        }

        function removeInfo() {
            while (textContainer.firstChild) {
                textContainer.removeChild(textContainer.firstChild);
            }
        }

    }, 300);
})();