import { expect, test } from "@playwright/test";

/**
 * Cluster A Playwright sweep — minimal happy-path proving the
 * `@suaveplan/packer-browser` Service Worker registers and intercepts a
 * packed URL. The broader multi-browser sweep + diagnostics + range
 * scenarios live in Cluster C.
 *
 * This spec is intentionally executable as a smoke test only; it depends
 * on a real HTTP server hosting the SW bundle and a `*.packed` resource,
 * which is set up out-of-band (Cluster A does not bundle a static
 * harness — see the package README's "Test plan" footer).
 */
test.describe("packed-resource SW interception (smoke)", () => {
    test("registers the SW and intercepts a packed URL", async ({ page }) => {
        await page.goto("/");
        const swSupported = await page.evaluate(
            () => "serviceWorker" in navigator
        );
        expect(swSupported).toBe(true);

        // Register the SW from the harness page.
        const registered = await page.evaluate(async () => {
            const reg =
                await navigator.serviceWorker.register("/service-worker.js");
            await navigator.serviceWorker.ready;
            return reg.scope;
        });
        expect(registered).toContain("/");

        // Trigger a packed-URL fetch and verify the SW handled it.
        const response = await page.evaluate(async () => {
            const r = await fetch("/sample.packed");
            return {
                status: r.status,
                unpacked: r.headers.get("X-Unpacked"),
            };
        });
        expect(response.status).toBe(200);
        expect(response.unpacked).toBe("true");
    });
});