// ==UserScript==
// @name         ASIN链接生成器
// @namespace    ASIN Link Generator
// @version      1.0
// @description  生成ASIN对应的链接并跳转到Amazon网站
// @match        https://www.amazon.*/*
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    // 获取当前Amazon站点的链接前缀
    function getAmazonSitePrefix() {
        const sitePrefix = window.location.hostname.split('.')[1];
        return 'https://www.amazon.' + sitePrefix + '/dp/';
    }

    // 创建一个按钮元素并添加到页面上
    function createButton(text, clickHandler) {
        const button = document.createElement('button');
        button.style.position = 'fixed';
        button.style.left = '20px';
        button.style.top = text === '打开ASIN' ? '50px' : '100px';
        button.style.transform = 'translateY(-50%)';
        button.textContent = text;
        button.addEventListener('click', clickHandler);
        document.body.appendChild(button);
    }

    // 点击“打开ASIN”按钮的处理函数
    function openASINHandler() {
        const asin = prompt('请输入ASIN');
        if (asin) {
            const url = getAmazonSitePrefix() + asin;
            window.location.href = url;
        }
    }

    // 点击“打开批量ASIN”按钮的处理函数
    function openBatchASINHandler() {
        const asins = prompt('请输入批量ASIN，以换行符分隔');
        if (asins) {
            const asinArray = asins.split('\n');
            const asinQuery = asinArray.join('%7C');
            const url = getAmazonSitePrefix() + 's?rh=p_78%3A' + asinQuery;
            window.location.href = url;
        }
    }

    // 创建并添加按钮到页面上
    createButton('打开ASIN', openASINHandler);
    createButton('打开批量ASIN', openBatchASINHandler);
})();