// ==UserScript==
// @name         B站看视频自动投币
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  如果当日投币经验没够50经验,则观看视频的时候自动投币点赞
// @author       JKstring
// @match        https://www.bilibili.com/video/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=bilibili.com
// @grant        none
// ==/UserScript==

(function() {
    const STATE = window.__INITIAL_STATE__;
    const MAXEXP = 50;
    const EXPPERCOIN = 10;
    //投币,aid视频id,multiply投币个数,select_like是否同时点赞
    function payCoin(aid, multiply, selectLike) {
        fetch("https://api.bilibili.com/x/web-interface/coin/add", {
            "headers": {
                "accept": "application/json, text/plain, */*",
                "content-type": "application/x-www-form-urlencoded",
            },
            "body": `aid=${aid}&multiply=${multiply}&select_like=${selectLike}&cross_domain=true&eab_x=2&ramval=0&source=web_normal&ga=1&csrf=${getCookie("bili_jct")}`,
            "method": "POST",
            "mode": "cors",
            "credentials": "include"
        });
    }
    async function getTodayEXP() {
        const response = await fetch("https://api.bilibili.com/x/web-interface/coin/today/exp", {
            "headers": {
                "accept": "application/json, text/plain, */*",
                "accept-language": "zh-CN,zh;q=0.9",
            },
            "method": "GET",
            "mode": "cors",
            "credentials": "include"
        })
        const data = await response.json();
        return data;
    }
    async function fetchRelation(aid, bvid) {
        const url = `https://api.bilibili.com/x/web-interface/archive/relation?aid=${aid}&bvid=${bvid}`;
        const headers = {
            "accept": "application/json, text/plain, */*",
            "accept-language": "zh-CN,zh;q=0.9",
        };

        const response = await fetch(url, {
            headers,
            method: "GET",
            mode: "cors",
            credentials: "include"
        });

        const data = await response.json();
        return data;
    }
    async function autoPayCoin() {
        //判断今日50经验是否圆满
        const todayExpData = await getTodayEXP();
        if(todayExpData.code != 0 || todayExpData.data>=MAXEXP)
        {//请求经验值失败或者当天经验大于50就取消自动
            return;
        }
        //判断当前视频是否已经投币过了
        const relation = await fetchRelation(STATE.aid, STATE.bvid);
        if(relation.data.coin>0)
        {
            //已经投币过了,似乎没啥要处理的,需要再加
        }else{
            //进行投币操作,先进行判断剩余经验适合投2币20经验还是1币10经验
            const canPayCoin = STATE.videoData.copyright === 1 ? 2 : 1;
            const canGetExp = MAXEXP - todayExpData.data;
            const payCoinNum = Math.min((canGetExp/EXPPERCOIN), canPayCoin);
            payCoin(STATE.aid,payCoinNum,0);
            console.log("投币完成:"+STATE.aid+"||"+payCoinNum);
        }
    }
    autoPayCoin();
})();