// ==UserScript==
// @name Bangumi 隐藏NSFW条目
// @version 3.1
// @description 隐藏NSFW条目
// @author 墨云
// @match https://bangumi.tv/*
// @match https://chii.in/*
// @match https://bgm.tv/*
// @grant none
// @namespace https://greasyfork.org/users/1354622
// @downloadURL none
// ==/UserScript==
 
(function() {
    'use strict';
 
    if (window.location.pathname.startsWith('/subject/')) {
        return;
    }

    const SETTING_KEY = 'bangumi_hide_nsfw_mode';
 
    const CACHE_EXPIRY = 7 * 24 * 60 * 60 * 1000;

    async function isSubjectChecked(subjectId) {
        const cacheKey = `nsfw_cache_${subjectId}`;
        const cachedData = localStorage.getItem(cacheKey);
        
        if (cachedData) {
            try {
                const data = JSON.parse(cachedData);
                if (Date.now() < data.timestamp + CACHE_EXPIRY) {
                    return data.value;
                }
            } catch (e) {
                localStorage.removeItem(cacheKey);
            }
        }

        try {
            const response = await fetch(`/subject/${subjectId}/edit_detail`);
            const text = await response.text();
            const isChecked = text.includes('checked="checked"');
            
            const dataToCache = {
                value: isChecked,
                timestamp: Date.now()
            };
            localStorage.setItem(cacheKey, JSON.stringify(dataToCache));
            return isChecked;
        } catch (error) {
            console.error('Failed to fetch subject detail:', error);

            const dataToCache = {
                value: false,
                timestamp: Date.now()
            };
            localStorage.setItem(cacheKey, JSON.stringify(dataToCache));
            return false;
        }
    }
    

    function getSubjectIdFromLink(link) {
        const url = link.href;
        if (url.startsWith('https://bangumi.tv/subject/')) {

            return url.split('/')[4];
        } else if (url.startsWith('/subject/')) {

            return url.split('/')[2];
        }
        return null;
    }


    async function applyMode(mode) {

        const listItems = document.querySelectorAll('li > a[href^="/subject/"], li.tml_item a[href^="https://bangumi.tv/subject/"], #user_home li a[href^="https://bangumi.tv/subject/"], #columnSubjectBrowserA .mainItem a[href^="https://bangumi.tv/subject/"], #columnSubjectBrowserA .mainItem a[href^="/subject/"]');
        const promises = [];


        for (const item of listItems) {
            const subjectId = getSubjectIdFromLink(item);
            if (subjectId) {
                promises.push(isSubjectChecked(subjectId).then(isChecked => {
                    if (isChecked) {
                        let containerToHide;

                        if (item.closest('#columnSubjectBrowserA')) {
                            containerToHide = item.closest('.mainItem');
                        } else {
                            containerToHide = item.closest('li');
                        }

                        if (containerToHide) {
                            containerToHide.style.display = (mode === 'hide') ? 'none' : '';
                        }
                    }
                }));
            }
        }

        await Promise.all(promises);
    }
 
    function addNSFWSetting() {
        chiiLib.ukagaka.addGeneralConfig({
            title: 'NSFW',
            name: 'nsfwMode',
            type: 'radio',
            defaultValue: 'off', 
            getCurrentValue: function() { return $.cookie(SETTING_KEY) || 'off'; },
            onChange: function(value) {
                $.cookie(SETTING_KEY, value, {expires: 30, path: '/'});
                applyMode(value);
            },
            options: [
                { value: 'off', label: '关闭' },
                { value: 'hide', label: '隐藏' }
            ]
        });
    }
 
    async function init() {

        if (document.readyState === 'loading') {
            document.addEventListener('DOMContentLoaded', addNSFWSetting);
        } else {
            addNSFWSetting();
        }
 
        const currentMode = $.cookie(SETTING_KEY) || 'off';
        await applyMode(currentMode);
 
        const observer = new MutationObserver((mutationsList) => {
            for (const mutation of mutationsList) {
                if (mutation.type === 'childList') {
                    mutation.addedNodes.forEach((node) => {

                        if (node.nodeType === 1 && node.querySelector('a[href^="/subject/"], a[href^="https://bangumi.tv/subject/"]')) {
                            console.log('检测到新条目加载，正在应用设置...');
                            applyMode($.cookie(SETTING_KEY) || 'off');
                        }
                    });
                }
            }
        });
        observer.observe(document.body, { childList: true, subtree: true });
    }
 
    init();
})();