'use strict';

const fs = require('fs');
const path = require('path');

const fileUtils = require('./utils/fileUtils');
const requestUtils = require('./utils/requestUtils');

const API_URL = "https://app.bilibili.com/x/v2/search/trending/ranking";
const SUB_FOLDER = "bilibili-hotband";

const DATA_FOLDER = path.join(path.dirname(__dirname), process.env.DATA_FOLDER ?? 'data', SUB_FOLDER);
console.log("DATA_FOLDER", DATA_FOLDER);
fileUtils.createFolder(DATA_FOLDER); // 程序运行就保证 data 目录存在

async function main() {
    let requestTimestamp = Date.now();
    let now = new Date(requestTimestamp + 8 * 3600 * 1000).toISOString();

    let result = await requestUtils.getApiResult(API_URL);
    if (result.code != 0) {
        console.log(new Date(Date.now() + 8 * 60 * 60 * 1000).toISOString(), SUB_FOLDER, "请求成功，但服务器处理失败，等待3s后重试。");
        await new Promise((resolve) => {
            setTimeout(resolve, 3000); // 等待3秒
        });
        result = await requestUtils.getApiResult(API_URL);
        if (result.ok != 1) {
            console.log(new Date(Date.now() + 8 * 60 * 60 * 1000).toISOString(), SUB_FOLDER, "请求成功，但服务器处理失败，保存失败信息。");
            // ok 不为 1，那么久直接保存便于后续分析，不进行后续处理
            fileUtils.saveJSON({
                saveFolder: DATA_FOLDER,
                now: now,
                fileNameSuffix: `origin-error`,
                object: result,
                compress: true,
                uncompress: false
            });
            return;
        }
    }

    console.log(new Date(Date.now() + 8 * 60 * 60 * 1000).toISOString(), SUB_FOLDER, "请求成功");
    // console.log("result", result);

    let data = result.data;

    // 去除 trackid
    delete data["trackid"];
    // console.log(data);

    /**
     * 保存原始数据
     */
    fileUtils.saveJSON({
        saveFolder: DATA_FOLDER,
        now: now,
        fileNameSuffix: `origin`,
        object: result,
        compress: true,
        uncompress: false
    });


    /**
     * 获取需要的数据，进行转换
     */
    let convert = [];
    data.list.forEach(item => {
        // {
        //     "position": 1,
        //     "keyword": "关键词",
        //     "show_name": "热搜名称",
        //     "word_type": 8,
        //     "icon": "热搜的图标，也可能没有",
        //     "hot_id": 7399 // 热搜id
        // }
        convert.push(item);
    });
    fileUtils.saveJSON({
        saveFolder: DATA_FOLDER,
        now: now,
        fileNameSuffix: `final`,
        object: convert,
        compress: true,
        uncompress: false,
    });

    /**
     * 更新最新的
     */
    fs.writeFileSync(`${DATA_FOLDER}/latest.json`, JSON.stringify({
        update_time: requestTimestamp,
        update_time_friendly: now.substring(0, 19).replace(/T/g, " "),
        data: data.list,
        exp_str: data.exp_str,
    }));
}

exports.main = main;