// ==UserScript==
// @name         银河复读放置+1功能
// @namespace    http://tampermonkey.net/
// @version      2025-04-06
// @description  牛牛+1脚本,点击按钮填充文本将第53,54行取消注释可以加入汪汪队,拒绝猫娘从我做起
// @author       Greenwaln
// @match        https://www.milkywayidle.com/*
// @match        https://test.milkywayidle.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=milkywayidle.com
// @grant        none
// @license      GPL-3.0

// @downloadURL none
// ==/UserScript==
(function () {
    'use strict';

    const chatSelector = 'div.ChatHistory_chatHistory__1EiG3';
    const messageSelector = '.ChatMessage_chatMessage__2wev4';
    const inputSelector = 'input.Chat_chatInput__16dhX';

    // 获取原生 setter，确保在 React 受控输入框上更新值有效
    const nativeInputValueSetter = Object.getOwnPropertyDescriptor(window.HTMLInputElement.prototype, 'value').set;

    // 插入自定义样式
    const style = document.createElement('style');
    style.innerHTML = `
        .tm-plus1-btn {
            display: inline-block;
            vertical-align: middle;
            color: transparent;       /* 默认文字透明 */
            background: none;
            border: none;
            font-size: inherit;
            cursor: pointer;
            width: 4ch;               /* 固定宽度4字符 */
            text-align: center;
            line-height: 1;
            transition: color 0.2s;
        }
        .tm-plus1-btn:hover {
            color: white;             /* 悬停时显示白色 */
        }
    `;
    document.head.appendChild(style);

    // 创建 +1 按钮
    function createPlusOneButton(text) {
        const btn = document.createElement('button');
        btn.innerText = '+1';
        btn.classList.add('tm-plus1-btn');
        btn.addEventListener('click', (e) => {
            e.stopPropagation();
            const input = document.querySelector(inputSelector);
            if (input) {
                // text = text.replace(/喵/g, '汪');
                // text += '汪';
                nativeInputValueSetter.call(input, text);
                input.dispatchEvent(new Event('input', { bubbles: true }));
            }
        });
        return btn;
    }

    // 从消息节点中提取纯文本内容及其所在的元素（排除时间戳、用户名等）
    function extractPureTextAndElement(msgElement) {
        const spans = msgElement.querySelectorAll('span');
        for (let i = spans.length - 1; i >= 0; i--) {
            const span = spans[i];
            if (span.childElementCount === 0 && span.textContent.trim() !== '') {
                if (!span.closest('.ChatMessage_name__1W9tB') && !span.closest('.ChatMessage_timestamp__1iRZO')) {
                    return { text: span.textContent.trim(), element: span };
                }
            }
        }
        return { text: '', element: null };
    }

    // 为每条消息添加 +1 按钮
    function addButtons() {
        const messages = document.querySelectorAll(messageSelector);
        messages.forEach((msg) => {
            if (!msg.dataset.hasPlusOne) {
                const { text, element } = extractPureTextAndElement(msg);
                if (text && element) {
                    if (!msg.querySelector('.tm-plus1-btn')) {
                        const btn = createPlusOneButton(text);
                        msg.appendChild(btn); // 插入整个消息节点的末尾
}

                }
                msg.dataset.hasPlusOne = 'true';
            }
        });
    }

    // 监听聊天区域的变化（针对 SPA 动态加载新消息）
    const chatContainer = document.querySelector(chatSelector);
    if (chatContainer) {
        const observer = new MutationObserver(() => {
            addButtons();
        });
        observer.observe(chatContainer, { childList: true, subtree: true });
    }

    // 定时检查，确保新消息能及时添加按钮
    setInterval(addButtons, 500);
})();