// ==UserScript==
// @name         数据发送工具
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  向本地后端发送当前页面的URL和Cookies
// @author       You
// @match        *://*/*
// @grant        GM_xmlhttpRequest
// @connect      127.0.0.1
// @connect      localhost
// ==/UserScript==

(function() {
    'use strict';

    // 配置：您可以修改这些变量来自定义行为
    const TARGET_SELECTOR = 'body'; // 按钮插入位置的选择器
    const BACKEND_IP = '127.0.0.1'; // 后端IP地址
    const BACKEND_PORT = '5100'; // 后端端口号
    
    // 构建后端基础URL
    const BACKEND_BASE_URL = `http://${BACKEND_IP}:${BACKEND_PORT}`;

    function addButton() {
        if (document.getElementById('data-sender-button')) {
            return;
        }

        const button = document.createElement('button');
        button.id = 'data-sender-button';
        button.textContent = "send data";
        button.style.position = "fixed";
        button.style.top = "12.5%";
        button.style.right = "1%";
        button.style.transform = "translateY(-50%)";
        button.style.padding = "3px 8px";
        button.style.fontSize = "10px";
        button.style.backgroundColor = "#007baf";
        button.style.color = "#fff";
        button.style.border = "none";
        button.style.borderRadius = "5px";
        button.style.cursor = "pointer";
        button.style.zIndex = "10000";

        button.addEventListener('click', function() {
            sendDataToBackend();
        });

        const targetElement = document.querySelector(TARGET_SELECTOR);
        
        if (targetElement && TARGET_SELECTOR !== 'body') {
            const buttonContainer = document.createElement('div');
            buttonContainer.style.display = 'inline-block';
            buttonContainer.style.marginLeft = '10px';
            
            button.style.position = 'relative';
            button.style.top = 'auto';
            button.style.right = 'auto';
            button.style.transform = 'none';
            button.style.margin = '0';
            
            buttonContainer.appendChild(button);
            
            if (targetElement.nextSibling) {
                targetElement.parentNode.insertBefore(buttonContainer, targetElement.nextSibling);
            } else {
                targetElement.parentNode.appendChild(buttonContainer);
            }
        } else {
            document.body.appendChild(button);
        }
    }

    function sendDataToBackend() {
        const currentUrl = window.location.href;
        const cookies = document.cookie;

        const data = {
            url: currentUrl,
            cookies: cookies,
            timestamp: new Date().toISOString()
        };

        // 禁用按钮防止重复点击
        const button = document.getElementById('data-sender-button');
        if (button) {
            button.disabled = true;
            button.textContent = "任务进行中...";
            button.style.backgroundColor = "#6c757d";
        }

        // 发送任务请求
        GM_xmlhttpRequest({
            method: "POST",
            url: `${BACKEND_BASE_URL}/start-crawl`,
            headers: {
                "Content-Type": "application/json"
            },
            data: JSON.stringify(data),
            onload: function(response) {
                if (response.status === 200) {
                    const result = JSON.parse(response.responseText);
                    if (result.task_id) {
                        alert("爬虫任务已启动！任务ID: " + result.task_id);
                        // 开始轮询任务状态
                        pollTaskStatus(result.task_id);
                    } else {
                        alert("任务启动失败: " + (result.message || "未知错误"));
                        resetButton();
                    }
                } else {
                    alert("请求失败，状态码: " + response.status);
                    resetButton();
                }
            },
            onerror: function(error) {
                console.error("数据发送失败:", error);
                alert("数据发送失败，请检查后端服务是否运行");
                resetButton();
            }
        });
    }

    function pollTaskStatus(taskId) {
        let pollCount = 0;
        const maxPolls = 300; // 最多轮询300次（5分钟，每秒一次）
        
        const pollInterval = setInterval(() => {
            pollCount++;
            
            GM_xmlhttpRequest({
                method: "GET",
                url: `${BACKEND_BASE_URL}/task-status/${taskId}`,
                onload: function(response) {
                    if (response.status === 200) {
                        const result = JSON.parse(response.responseText);
                        
                        // 更新按钮状态显示进度
                        const button = document.getElementById('data-sender-button');
                        if (button) {
                            button.textContent = `任务中...${pollCount}s`;
                        }
                        
                        if (result.status === 'completed') {
                            clearInterval(pollInterval);
                            alert("爬虫任务完成！\n结果: " + JSON.stringify(result.result, null, 2));
                            resetButton();
                        } else if (result.status === 'failed') {
                            clearInterval(pollInterval);
                            alert("爬虫任务失败: " + result.error);
                            resetButton();
                        }
                        // 如果状态是 'running'，继续轮询
                    } else {
                        console.error("获取任务状态失败:", response.status);
                    }
                },
                onerror: function(error) {
                    console.error("轮询任务状态失败:", error);
                }
            });
            
            // 超过最大轮询次数，停止轮询
            if (pollCount >= maxPolls) {
                clearInterval(pollInterval);
                alert("任务超时，请稍后手动检查结果");
                resetButton();
            }
        }, 1000); // 每秒轮询一次
    }

    function resetButton() {
        const button = document.getElementById('data-sender-button');
        if (button) {
            button.disabled = false;
            button.textContent = "send data";
            button.style.backgroundColor = "#007baf";
        }
    }

    // 初始尝试添加按钮
    addButton();

    // 使用MutationObserver监听DOM变化
    const observer = new MutationObserver(function(mutations) {
        addButton();
    });

    observer.observe(document.body, {
        childList: true,
        subtree: true
    });

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', addButton);
    } else {
        addButton();
    }

})();