import { describe, expect, test } from "bun:test";
import { isOneOf, parseId } from "../validate";

describe("parseId", () => {
	test("returns the integer for valid numeric strings", () => {
		expect(parseId("42")).toBe(42);
		expect(parseId("1")).toBe(1);
	});

	test("returns null for invalid, negative, zero, or missing ids", () => {
		expect(parseId("0")).toBe(null);
		expect(parseId("-1")).toBe(null);
		expect(parseId("abc")).toBe(null);
		expect(parseId("")).toBe(null);
		expect(parseId(undefined)).toBe(null);
	});

	test("rejects mixed alphanumeric strings (strict — route params must be wholly numeric)", () => {
		expect(parseId("42abc")).toBe(null);
		expect(parseId("abc42")).toBe(null);
		expect(parseId("42 ")).toBe(null);
		expect(parseId("+42")).toBe(null);
		expect(parseId("42.0")).toBe(null);
	});
});

describe("isOneOf", () => {
	test("narrows to allowed string literals", () => {
		expect(isOneOf("keep", ["keep", "remove"] as const)).toBe(true);
		expect(isOneOf("remove", ["keep", "remove"] as const)).toBe(true);
	});

	test("rejects disallowed values and non-strings", () => {
		expect(isOneOf("delete", ["keep", "remove"] as const)).toBe(false);
		expect(isOneOf(null, ["keep", "remove"] as const)).toBe(false);
		expect(isOneOf(42, ["keep", "remove"] as const)).toBe(false);
	});
});