// ==UserScript==
// @name         cph-submit.background
// @namespace    http://tampermonkey.net/
// @version      0.1.0
// @description  cph-submit 后台脚本
// @author       Andy_hpy
// @grant        GM_xmlhttpRequest
// @grant        GM_setValue
// @grant        GM_openInTab
// @grant        GM_log
// @background
// @storageName  cph-submit
// ==/UserScript==

const LOOP_INTERVAL = 3000;
const CPH_URL = 'http://localhost:27121/getSubmit';

function getSubmitUrl(problemUrl) {
    if (!problemUrl.includes('contest')) {
        return 'https://codeforces.com/problemset/submit';
    }
    const match = problemUrl.match(/contest\/(\d+)/);
    if (match) {
        return `https://codeforces.com/contest/${match[1]}/submit`;
    }
    const match2 = problemUrl.match(/gym\/(\d+)/);
    if (match2) {
        return `https://codeforces.com/gym/${match2[1]}/submit`;
    }
    return 'https://codeforces.com/problemset/submit';
}

function poll() {
    GM_xmlhttpRequest({
        method: 'GET',
        url: CPH_URL,
        headers: { 'cph-submit': 'true' },
        onload: function(res) {
            if (res.status === 200) {
                try {
                    const data = JSON.parse(res.responseText);
                    if (!data.empty) {
                        const task = {
                            problemName: data.problemName,
                            languageId: data.languageId,
                            sourceCode: data.sourceCode,
                            url: data.url,
                            timestamp: Date.now()
                        };
                        GM_setValue('pendingSubmit', JSON.stringify(task));
                        const submitUrl = getSubmitUrl(data.url);
                        GM_openInTab(submitUrl, { active: true, insert: true });
                    } else {
                        GM_log('服务器返回 empty，无任务', "error");
                    }
                } catch (e) {
                    GM_log('解析 JSON 失败: ' + e.message, "error");
                }
            } else {
                GM_log('HTTP 错误: ' + res.status, "error");
            }
        },
        onerror: function(err) {
            GM_log('请求失败: ' + JSON.stringify(err), "error");
        }
    });
}

setInterval(poll, LOOP_INTERVAL);