// ==UserScript==
// @name         关键词叠词生成器
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  输入关键词生成组合叠词并添加复制按钮
// @author       You
// @match        https://www.amazon.com/*
// @match        https://www.amazon.co.uk/*
// @grant        GM_addStyle
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    // 插入输入框、生成按钮、输出区域
    const inputBox = document.createElement('input');
    inputBox.type = 'text';
    inputBox.placeholder = '';  // 删除了输入框的提示文字
    inputBox.style.width = '300px';
    inputBox.style.padding = '8px';
    inputBox.style.margin = '10px';

    const generateButton = document.createElement('button');
    generateButton.textContent = '生成叠词';
    generateButton.style.padding = '8px 16px';
    generateButton.style.margin = '10px';

    const copyButton = document.createElement('button');
    copyButton.textContent = '一键复制';
    copyButton.style.padding = '8px 16px';
    copyButton.style.margin = '10px';

    const outputArea = document.createElement('pre');
    outputArea.style.whiteSpace = 'pre-wrap';
    outputArea.style.wordWrap = 'break-word';
    outputArea.style.marginTop = '10px';
    outputArea.style.border = '1px solid #ccc';
    outputArea.style.padding = '10px';
    outputArea.style.maxHeight = '300px';
    outputArea.style.overflowY = 'scroll';

    // 添加到页面
    document.body.appendChild(inputBox);
    document.body.appendChild(generateButton);
    document.body.appendChild(copyButton);
    document.body.appendChild(outputArea);

    // 生成叠词组合
    function generateCombinations(input) {
        const words = input.trim().split(' ');
        const length = words.length;
        let combinations = [];

        if (length === 2) {
            // 处理 AB 形式
            combinations.push(`${words[0]} ${words[0]} ${words[1]} ${words[1]}`);
            combinations.push(`${words[0]} ${words[1]} ${words[0]} ${words[1]}`);
            combinations.push(`${words[0]} ${words[0]} ${words[1]}`);
            combinations.push(`${words[0]} ${words[1]} ${words[1]}`);
        } else if (length === 3) {
            // 处理 ABC 形式
            combinations.push(`${words[0]} ${words[1]} ${words[2]} ${words[0]} ${words[1]} ${words[2]}`);
            combinations.push(`${words[0]} ${words[0]} ${words[1]} ${words[1]} ${words[2]} ${words[2]}`);
            combinations.push(`${words[0]} ${words[0]} ${words[1]} ${words[2]}`);
            combinations.push(`${words[0]} ${words[1]} ${words[1]} ${words[2]}`);
            combinations.push(`${words[0]} ${words[1]} ${words[2]} ${words[2]}`);
        }

        return combinations.join('\n');
    }

    // 生成叠词按钮点击事件
    generateButton.addEventListener('click', () => {
        const input = inputBox.value;
        if (input) {
            outputArea.textContent = generateCombinations(input);
        } else {
            outputArea.textContent = '请输入关键词！';
        }
    });

    // 复制按钮点击事件
    copyButton.addEventListener('click', () => {
        const textToCopy = outputArea.textContent;
        if (textToCopy) {
            navigator.clipboard.writeText(textToCopy).then(() => {
                alert('已复制到剪贴板！');
            });
        } else {
            alert('没有生成叠词可复制！');
        }
    });

})();