/**
 * 05 — Display-currency switching (RUB / USD / EUR / KZT / UAH / TRY / …)
 *
 * Catalog endpoints quote product prices in any of the supported ISO-4217
 * currencies. RUB is the legacy default — a client that doesn't ask for
 * anything else keeps getting ruble prices, same as before SDK 0.27.
 *
 * Resolution order on the server (highest priority first):
 *   1. `?currency=USD` query param (per-call override)
 *   2. `X-Currency` request header (SDK injects when constructor has
 *      `currency: "USD"` configured)
 *   3. RUB default
 *
 * Run with:
 *   GAMECORE_API_KEY=gc_live_... bun run examples/05-currency-switching.ts
 */

import { GameCoreClient, type SdkCurrency } from "@gamecore-api/sdk";

const apiKey = process.env.GAMECORE_API_KEY!;
const baseUrl = "https://api.gamecore-api.tech";

// Approach A — one client per currency. Simplest for a single-currency
// storefront (e.g. a US store that always shows USD).
const ru = new GameCoreClient({ apiKey, baseUrl, currency: "RUB" });
const usd = new GameCoreClient({ apiKey, baseUrl, currency: "USD" });

const gameSlug = "free-fire";
const ruProducts = await ru.catalog.getProducts(gameSlug);
const usdProducts = await usd.catalog.getProducts(gameSlug);
console.log("RUB first product:", {
	name: ruProducts[0]?.name,
	price: ruProducts[0]?.price,
	currency: ruProducts[0]?.currency, // "RUB"
});
console.log("USD first product:", {
	name: usdProducts[0]?.name,
	price: usdProducts[0]?.price,
	currency: usdProducts[0]?.currency, // "USD"
});

// Approach B — single client, switch at runtime. Wire this to a
// storefront currency picker so the next product fetch comes back
// already converted.
const gc = new GameCoreClient({ apiKey, baseUrl });
console.log("default currency:", gc.getCurrency()); // undefined → RUB
gc.setCurrency("KZT");
const kztProducts = await gc.catalog.getProducts(gameSlug);
console.log(
	"KZT first product:",
	kztProducts[0]?.price,
	kztProducts[0]?.currency,
);

// Approach C — per-call override. Admin tool example: a Russian
// operator inspects an EN/EUR preview of a product without flipping
// the rest of the session.
const previewCurrencies: SdkCurrency[] = ["EUR", "TRY", "UAH"];
for (const ccy of previewCurrencies) {
	const products = await gc.catalog.getProducts(gameSlug, { currency: ccy });
	console.log(`${ccy}:`, products[0]?.price, products[0]?.currency);
}

// Notes for AI agents copying this example:
//   • Don't try to convert prices yourself — the server applies live FX
//     rates from open.er-api.com and rounds per-currency (whole KZT,
//     2-decimal EUR, etc.). Doing it client-side will drift.
//   • Always use `product.currency` for the display string instead of
//     hardcoding the requested code — the server is the source of
//     truth when an FX rate is missing.
//   • Checkout is unrelated: payment gateways still settle in RUB or
//     USD depending on the chosen `paymentMethod`. The display
//     currency is purely catalog-side until checkout currency support
//     ships.