// ==UserScript==
// @name         Universal Link Behavior Controller
// @namespace    http://tampermonkey.net/
// @version      1.2
// @description  提供优雅的图形界面控制所有网站链接的行为，并持久化保存设置
// @author       Grey333
// @match        *://*/*
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_registerMenuCommand
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    const currentDomain = window.location.hostname;

    const getConfig = () => GM_getValue(currentDomain, 'default');
    const setConfig = (value) => GM_setValue(currentDomain, value);

    function createGUI() {
        if (document.getElementById('linkControlPanel')) return;

        const panel = document.createElement('div');
        panel.id = 'linkControlPanel';
        panel.style.cssText = `
            position: fixed;
            top: 20px;
            right: 20px;
            background: #f9f9f9;
            border: 1px solid #ddd;
            border-radius: 8px;
            padding: 15px;
            z-index: 10000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            font-family: Arial, sans-serif;
            transition: opacity 0.3s ease-in-out;
            opacity: 0;
            max-width: 300px;
            min-width: 200px;
        `;

        const title = document.createElement('h3');
        title.textContent = `链接控制 - ${currentDomain}`;
        title.style.margin = '0 0 10px';
        panel.appendChild(title);

        const options = [
            { label: '默认（不干预）', value: 'default' },
            { label: '强制新标签页', value: 'forceNewTab' },
            { label: '禁止新标签页', value: 'forceSameTab' }
        ];

        options.forEach(opt => {
            const label = document.createElement('label');
            label.style.display = 'block';
            label.style.margin = '5px 0';

            const radio = document.createElement('input');
            radio.type = 'radio';
            radio.name = 'linkBehavior';
            radio.value = opt.value;
            if (getConfig() === opt.value) radio.checked = true;

            radio.addEventListener('change', () => {
                setConfig(opt.value);
                alert(`已为 ${currentDomain} 设置: ${opt.label}`);
            });

            label.appendChild(radio);
            label.appendChild(document.createTextNode(` ${opt.label}`));
            panel.appendChild(label);
        });

        const closeBtn = document.createElement('button');
        closeBtn.textContent = '关闭';
        closeBtn.style.cssText = `
            margin-top: 15px;
            padding: 5px 10px;
            background: #007bff;
            color: #fff;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        `;
        closeBtn.addEventListener('click', () => {
            panel.style.opacity = '0';
            setTimeout(() => panel.remove(), 300);
        });
        panel.appendChild(closeBtn);

        document.body.appendChild(panel);
        setTimeout(() => panel.style.opacity = '1', 10);
    }

    GM_registerMenuCommand('设置链接行为', createGUI);

    function applyLinkBehavior() {
        const config = getConfig();
        if (config === 'default') return;

        document.addEventListener('click', (e) => {
            const link = e.target.closest('a');
            if (!link || !link.href) return;

            if (config === 'forceNewTab') {
                e.preventDefault();
                window.open(link.href, '_blank');
            } else if (config === 'forceSameTab') {
                e.preventDefault();
                window.location.href = link.href;
            }
        });
    }

    applyLinkBehavior();
})();