import { describe, it } from "vitest";
import { assertProperty, fc } from "../../../test/property.ts";
import { parseLlmsLinks } from "../map.ts";

const baseUrl = fc.constantFrom(
	"https://example.com/",
	"https://host.test/docs/",
	"http://a.b.c/x/y/",
);

describe("parseLlmsLinks (property)", () => {
	it("only ever yields well-formed absolute URLs, for any input text", () => {
		assertProperty(
			import.meta.url,
			"parseLlmsLinks yields absolute URLs",
			fc.property(fc.string(), baseUrl, (text, base) => {
				const links = parseLlmsLinks(text, base);
				return links.every((link) => {
					try {
						const url = new URL(link);
						// Absolute + idempotent normalization: re-serializing is stable.
						return url.protocol.length > 0 && new URL(link).toString() === link;
					} catch {
						return false;
					}
				});
			}),
		);
	});
});