var totalOrders = 0;
var totalSpent = 0;
var totalShippingSpent = 0;
var totalItems = 0;
var pulling = true;
var offset = 0;

function getStatistics() {
	var orders = [];
	var xhttp = new XMLHttpRequest();
	xhttp.onreadystatechange = function() {
		if (this.readyState == 4 && this.status == 200) {
			orders = JSON.parse(this.responseText)['orders'];
			totalOrders += orders.length;
			pulling = orders.length >= 10;
			orders.forEach(order => {
				let tpa = order["paid_amount"] / 100000;
				totalSpent += tpa;
				let tpsa = order["shipping_fee"] / 100000;
                totalShippingSpent += tpsa;
                order["items"].forEach(item => {
                    let tpti = item["amount"];
                    totalItems += tpti;
                });
			});
			offset += 10;
			console.log('Đã lấy được: ' + totalOrders + ' đơn hàng');
			if(pulling) {
				console.log('Đang kéo thêm...');
				getStatistics();
			}
			else {
				console.log("%cTổng đơn hàng đã giao: "+"%c"+moneyFormat(totalOrders), "font-size: 30px;","font-size: 30px; color:red");
                console.log("%cTổng sản phẩm đã đặt: " + "%c" + moneyFormat(totalItems), "font-size: 30px;","font-size: 30px; color:red");
				console.log("%cTổng chi tiêu: "+"%c"+moneyFormat(totalSpent)+"đ", "font-size: 30px;","font-size: 30px; color:red");
				console.log("%cTổng tiền ship: "+"%c"+moneyFormat(totalShippingSpent)+"đ", "font-size: 30px;","font-size: 30px; color:red");
			}
		}
	};
	xhttp.open("GET", "https://shopee.vn/api/v1/orders/?order_type=3&offset=" + offset + "&limit=10", true);
	xhttp.send();
}

function moneyFormat(number, fixed=0) {
	if(isNaN(number)) return 0;
	number = number.toFixed(fixed);
	let delimeter = ',';
	number += '';
	let rgx = /(\d+)(\d{3})/;
	while (rgx.test(number)) {
		number = number.replace(rgx, '$1' + delimeter + '$2');
	}
	return number;
}