var items = [];
var userId = (await(await fetch('https://allegro.pl/login/user')).json()).userId;
for(;;)
{
	var f = fetch(`https://edge.allegro.pl/sale/offers?seller.id=userId&sellingMode.format=BUY_NOW&publication.status=ACTIVE&limit=1000&offset=${items.length}`, {
	  "headers": {
		"accept": "application/vnd.allegro.web.v1+json; charset=UTF-8",
		"accept-language": "pl-PL",
		"content-type": "application/vnd.allegro.public.v1+json; charset=UTF-8",
		"sec-ch-ua": "\" Not A;Brand\";v=\"99\", \"Chromium\";v=\"90\", \"Microsoft Edge\";v=\"90\"",
		"sec-ch-ua-mobile": "?0",
		"sec-fetch-dest": "empty",
		"sec-fetch-mode": "cors",
		"sec-fetch-site": "same-site"
	  },
	  "referrerPolicy": "unsafe-url",
	  "body": null,
	  "method": "GET",
	  "mode": "cors",
	  "credentials": "include"
	});
	var resp = await (await f).json()
	items = [...items, ...resp.items];
	await new Promise(r => setTimeout(r, 1000));
	if(resp.totalItems <= items.length)
		break;
}
(function(console){

console.save = function(data, filename){

    if(!data) {
        console.error('Console.save: No data')
        return;
    }

    if(!filename) filename = 'console.json'

    if(typeof data === "object"){
        data = JSON.stringify(data, undefined, 4)
    }

    var blob = new Blob([data], {type: 'text/json'}),
        e    = document.createEvent('MouseEvents'),
        a    = document.createElement('a')

    a.download = filename
    a.href = window.URL.createObjectURL(blob)
    a.dataset.downloadurl =  ['text/json', a.download, a.href].join(':')
    e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null)
    a.dispatchEvent(e)
 }
})(console)

toSave = items.map(x=>`${x.offerId};${x.offerTitle};${x.buyNowPrice.amount.toString().replace('.',',')};${x.inSaleAmount}`);
toSave.unshift('ID;Tytuł;Cena;Ilość');
console.save(toSave.join('\r\n'), 'allegro.csv')