import type { Portfolio } from "../api/usePortfolio";

type Money = Portfolio["totalsByCurrency"][number];

function formatDecimal(value: string): string {
	const [integer, fraction] = value.split(".");
	const sign = integer.startsWith("-") ? "-" : "";
	const grouped = (sign ? integer.slice(1) : integer).replace(
		/\B(?=(\d{3})+(?!\d))/g,
		" ",
	);
	return `${sign}${grouped}${fraction ? `,${fraction}` : ""}`;
}

function formatMoney(money: Money | null): string {
	if (!money) return "—";
	return `${formatDecimal(money.value)} ${money.currency === "RUB" ? "₽" : money.currency}`;
}

function formatShare(
	numerator: Money | null,
	denominator: Money | null,
): string | null {
	if (!numerator || !denominator) return null;
	const total = Number(denominator.value);
	if (!Number.isFinite(total) || total <= 0) return null;
	const percent = (Number(numerator.value) / total) * 100;
	if (!Number.isFinite(percent)) return null;
	const rounded = new Intl.NumberFormat("ru-RU", {
		maximumFractionDigits: 1,
	}).format(percent);
	return `${rounded} %`;
}

function formatSnapshotTime(value: string): string {
	return new Intl.DateTimeFormat("ru-RU", {
		dateStyle: "medium",
		timeStyle: "short",
		timeZone: "UTC",
	}).format(new Date(value));
}

function portfolioErrorCode(error: unknown): string | undefined {
	return typeof error === "object" && error !== null && "code" in error
		? String(error.code)
		: undefined;
}

const logoSize = 160;

function instrumentLogoUrl(logoName: string | null | undefined): string | null {
	const stem = logoName?.trim().replace(/\.png$/i, "");
	return stem
		? `https://invest-brands.cdn-tinkoff.ru/${stem}x${logoSize}.png`
		: null;
}

export {
	formatMoney,
	formatShare,
	formatSnapshotTime,
	instrumentLogoUrl,
	portfolioErrorCode,
};