// ==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对应的Amazon站点
// @match        https://www.amazon.*/*
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    // 获取当前Amazon站点的链接前缀
    function getAmazonURLPrefix() {
        const amazonURL = window.location.href;
        const domain = amazonURL.split('/')[2];
        if (domain === 'www.amazon.com') {
            return 'https://www.amazon.com';
        } else if (domain === 'www.amazon.ca') {
            return 'https://www.amazon.ca';
        } else if (domain === 'www.amazon.co.uk') {
            return 'https://www.amazon.co.uk';
        } else if (domain === 'www.amazon.de') {
            return 'https://www.amazon.de';
        } else {
            return null;
        }
    }

    // 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' ? '50%' : '55%';
        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 urlPrefix = getAmazonURLPrefix();
            if (urlPrefix) {
                const url = urlPrefix + '/dp/' + 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 urlPrefix = getAmazonURLPrefix();
            if (urlPrefix) {
                const asinArray = asins.split('\n');
                const asinQuery = asinArray.join('%7C');
                const url = urlPrefix + '/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);
})();