import { describe, expect, it } from "vitest";
import { apiUnavailable, pagination, positiveBigInt } from "@/lib/api";

describe("apiUnavailable", () => {
	it("returns a no-store 503 error without exposing internal details", async () => {
		const response = apiUnavailable("Account data is temporarily unavailable");

		expect(response.status).toBe(503);
		expect(response.headers.get("cache-control")).toBe("no-store");
		await expect(response.json()).resolves.toEqual({
			error: "Account data is temporarily unavailable",
		});
	});
});

describe("positiveBigInt", () => {
	it.each(["1", "9007199254740993"])("parses positive integer id %s", (raw) => {
		expect(positiveBigInt(raw)).toBe(BigInt(raw));
	});

	it.each([null, "", "0", "-1", "1.5", "abc"])(
		"rejects invalid id %s",
		(raw) => {
			expect(positiveBigInt(raw)).toBeNull();
		},
	);
});

describe("pagination", () => {
	it("rejects fractional and malformed values before they reach Prisma", () => {
		const params = new URLSearchParams({ page: "2.5", perPage: "10.1" });

		expect(pagination(params, 20, 100)).toEqual({
			page: 1,
			perPage: 20,
			skip: 0,
			take: 20,
		});
	});

	it("clamps valid page sizes to the configured maximum", () => {
		const params = new URLSearchParams({ page: "3", perPage: "999" });

		expect(pagination(params, 20, 100)).toEqual({
			page: 3,
			perPage: 100,
			skip: 200,
			take: 100,
		});
	});
});