// ==UserScript==
// @name         链滴新消息提示
// @namespace    https://bbs.tampermonkey.net.cn/2
// @version      0.1.7
// @description  链滴新消息提示
// @author       Wilsons
// @icon         https://ld246.com/images/favicon.png
// @background
// @connect      ld246.com
// @grant        GM_xmlhttpRequest
// @grant        GM_notification
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_info
// @grant        GM_log
// ==/UserScript==

/* ==UserConfig==
noticeConfig:
  delayTime:
    title: 检查消息时间间隔
    description: 多久获取一次消息（单位分钟）
    type: number
    default: 10
    min: 1
    max: 240
    password: false
    unit: 分钟
  enableNewDoc:
    title: 是否开启新帖子提示
    description: 开启
    type: checkbox
    default: true
  maxPoint:
    title: 当新帖悬赏大于或等于多少时提示
    description: 默认0，即所有新帖都提示
    type: text
    default: 
    min: 0
  enableNewNotice:
    title: 是否开启新消息提示
    description: 开启
    type: checkbox
    default: true
  token:
    title: 链滴Token
    description: 在链滴 设置 - 账号 中找到 API Token
    type: text
    default: 
    min: 3
    max: 50
    password: false
 ==/UserConfig== */

  /////////////////// 主流程 ////////////////////////////
let token = '', articleTitle='', noticeNum = 0, articleType=0;
const main = async () => {
  let hasNewDoc=false, hasNewNotice=false, lastArticleId;
  const isFirstRun = getUnixTimestamp() > GM_getValue('firstRunEndTime', 0);
  if(isFirstRun) GM_setValue('firstRunEndTime', getTodayEndTimestamp());
  const lastRunTime = GM_getValue('lastRunTime') || 0;
  const delayTime = GM_getValue('noticeConfig.delayTime') || 0;
  if(!isFirstRun && getUnixTimestamp() - lastRunTime < delayTime * 60) return;
  GM_setValue('lastRunTime', getUnixTimestamp());
  token = GM_getValue('noticeConfig.token');
  if(!token) {
    if(isFirstRun) shownNotification('请先配置Token，方法：在链滴 设置 - 账号 中找到 API Token', ()=>{
      window.open('https://ld246.com/settings/account');
    });
    return;
  }
  lastArticleId = GM_getValue('lastArticleId');
  if(!lastArticleId) {
    lastArticleId = await getLastArticleId();
    GM_setValue('lastArticleId', lastArticleId);
  }

  let pointStr = '', aid=0;
  const enableNewDoc = GM_getValue('noticeConfig.enableNewDoc');
  if(enableNewDoc) {
    aid = await getLastArticleId();
    if(aid !== lastArticleId) {
      hasNewDoc = true;
      GM_setValue('lastArticleId', aid);
      const maxPoint = (GM_getValue('noticeConfig.maxPoint') || 0) - 0;
      // 获取帖子悬赏
      if(articleType === 5){ // 当是问答时，检测悬赏值
        const point = await getArticlePoint(aid);
        pointStr = `（悬赏：${point}）`;
        // 悬赏低于指定值不提示
        if(maxPoint && point < maxPoint) {
          hasNewDoc = false;
        }
      } else if(maxPoint){
        hasNewDoc = false; // 非问答，且开启了最大悬赏限制则不提示
      }
    }
  }
  const enableNewNotice = GM_getValue('noticeConfig.enableNewNotice');
  if(enableNewNotice) {
    const num = await getNoticeNums();
    if(num) hasNewNotice = true;
  }

  if(hasNewDoc && hasNewNotice) {
    shownNotification(`有新帖${articleTitle.replace(/(.+)/, '“$1”')}发布${pointStr}和有${(noticeNum+'').replace(/(.+)/, '$1条')}新消息！`, ()=>{
      window.open('https://ld246.com/article/'+aid);
      //window.open('https://ld246.com/notifications/commented');
    });
  } else if(hasNewDoc) {
    shownNotification(`有新帖${articleTitle.replace(/(.+)/, '“$1”')}发布${pointStr}！`, ()=>{
      window.open('https://ld246.com/article/'+aid);
    });
  } else if(hasNewNotice) {
    shownNotification(`您有${(noticeNum+'').replace(/(.+)/, '$1条')}新的消息`, ()=>{
      window.open('https://ld246.com/notifications/commented');
    });
  }
};

// 启动主函数
main();
setInterval(()=>{
  main();
}, 60000);

/////////////////// 辅助函数 ////////////////////////////
async function getLastArticleId() {
  try{
    // see https://ld246.com/article/1488603534762
    const result = await fetchUrl('https://ld246.com/api/v2/articles/latest?p=1');
    const json = JSON.parse(result.text);
    const articles = json?.data?.articles || [];
    const topestArticle = articles.filter(a => a.articleStick === -1) // 获取置顶帖子
      .sort((a, b) => b.articleCreateTime - a.articleCreateTime)[0]; // 按时间降序，取第一个
    let article = articles.find(a=>a.articleStick===0); // 获取非置顶帖子
    if(!article) return 0;
    if(topestArticle && topestArticle.articleCreateTime > article.articleCreateTime) {
      article = topestArticle; // 当置顶是最新贴取置顶，否则取最新非置顶的帖子
    }
    const aid = article?.oId;
    articleTitle = article?.articleTitle || '';
    articleType = article?.articleType || 0;
    return aid;
  }catch(e) {
    console.log(e);
    GM_log(`《${GM_info.script.name}》脚本异常：${e}`, "warn");
    return 0;
  }
}
  async function getNoticeNums() {
  try{
    // see https://ld246.com/article/1488603534762
    const result = await fetchUrl('https://ld246.com/api/v2/notifications/unread/count');
    const json = JSON.parse(result.text);
    const nums = Object.values(json?.data) || [];
    const sum = nums.reduce((acc, curr) => acc + curr, 0);
    noticeNum = sum || 0;
    return sum;
  }catch(e) {
    console.log(e);
    GM_log(`《${GM_info.script.name}》脚本异常：${e}`, "warn");
    return 0;
  }
}
async function getArticlePoint(aid) {
  try{
    // see https://ld246.com/article/1488603534762
    const result = await fetchUrl('https://ld246.com/api/v2/article/'+aid+'?p=1');
    const json = JSON.parse(result.text);
    const point = json?.data?.article?.articleQnAOfferPoint;
    return point;
  }catch(e) {
    console.log(e);
    GM_log(`《${GM_info.script.name}》脚本异常：${e}`, "warn");
    return 0;
  }
}
function shownNotification(msg, callback) {
  GM_notification({
      title: `${GM_info.script.name}`,
      text: `${msg}`,
      requireInteraction: true,
      onclick: callback
  });
}
function fetchUrl(url, method = 'GET', data = null) {
    return new Promise((resolve, reject) => {
        GM_xmlhttpRequest({
            method: method,
            url: url,
            data: data,
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded',
                'Authorization': `token ${token}`,
            },
            onload: (response) => {
                if (response.status >= 200 && response.status < 400) {
                    resolve({text: response.responseText, status: response.status});
                } else {
                    reject(new Error(`网络请求状态码异常-${response.status}`));
                }
            },
            onerror: (error) => {
                reject(new Error(`网络请求异常-${error}`));
            }
        });
    });
}
function getUnixTimestamp() {
  return Math.floor(Date.now() / 1000);
}
function getTodayEndTimestamp() {
  const end = new Date();
  end.setHours(23, 59, 59, 999); // 设置为今天 23:59:59.999
  return Math.floor(end.getTime() / 1000);
}