// examples for test:
// resolver.url - https://pctest-live-front.playbattlegrounds.com
// appUrl - https://pctest-live-front.playbattlegrounds.com/app/jk-pc-pc-1911-99/index-steam.jk-pc-pc-1911-99.html
// rootUrl - (comes from appUrl page in script tag broConfiguration.uri) https://pctest-live-cfentry.playbattlegrounds.com/publicproxy
// fetch is node-fetch

const call = `${rootUrl}/${apiName}/${methodName}`;

const agent = new http.Agent({
    keepAlive: true
});

// Don't know if CORS stuff is necessary, or if correct game user-agent is necessary (it seems to be for websocket api), referer and origin are necessary though
const commonHeaders = {
    'Referer': appUrl,
    'Origin': resolver.url,
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.86 Safari/537.36',
    'Access-Control-Request-Method': 'POST',
    'Access-Control-Request-Headers': 'accept, origin, content-type',
};
const preflight = new fetch.Request(call, {
    method: 'options',
    agent,
    headers: Object.assign({}, commonHeaders, {
        'Access-Control-Request-Method': 'POST',
        'Access-Control-Request-Headers': 'Content-Type',
    }),
});
/** @type {fetch.Response} */
const pfres = await fetch(preflight);

// don't think invokerId matters for publicproxy api
const body = [invokerId++,null,apiName,methodName,...parameters];

const req = new fetch.Request(call, {
    method: 'post',
    agent,
    body: JSON.stringify(body),
    headers: Object.assign({}, commonHeaders),
});

const res = await fetch(req);
if (res.ok) {
    const result = await res.json()

// apiName: 'PublicProxyApi'
// methodName: 'GetMissionSystemData'
// parameters: ['steam.7656...'] (replace with steam id, no authentication so I don't think it matters whose it is)

// apiName: 'PublicProxyApi'
// methodName: 'GetBattlePassDatas'
// parameters: ['steam.7656...'] (replace with steam id, no authentication so I don't think it matters whose it is)