import { beforeAll, describe, expect, it } from "@suaveplan/testing/runner";
import { sodiumReady } from "../../init/init.js";
import { sodiumAgreeEngine } from "./sodium-agree-engine.js";

describe("sodiumAgreeEngine", () => {
    beforeAll(async () => {
        await sodiumReady();
    }, 30_000);

    it("generateKeypair returns 32-byte public and secret keys", {
        timeout: 30_000,
    }, () => {
        const kp = sodiumAgreeEngine.generateKeypair();
        expect(kp.publicKey.length).toBe(32);
        expect(kp.secretKey.length).toBe(32);
    });

    it("agree produces the same shared secret for both parties", {
        timeout: 30_000,
    }, () => {
        const alice = sodiumAgreeEngine.generateKeypair();
        const bob = sodiumAgreeEngine.generateKeypair();

        const aliceShared = sodiumAgreeEngine.agree(
            alice.secretKey,
            bob.publicKey
        );
        const bobShared = sodiumAgreeEngine.agree(
            bob.secretKey,
            alice.publicKey
        );

        expect(aliceShared).toEqual(bobShared);
    });

    it("shared secret is 32 bytes", { timeout: 30_000 }, () => {
        const alice = sodiumAgreeEngine.generateKeypair();
        const bob = sodiumAgreeEngine.generateKeypair();
        const shared = sodiumAgreeEngine.agree(alice.secretKey, bob.publicKey);
        expect(shared.length).toBe(32);
    });

    it("different keypairs produce different shared secrets", {
        timeout: 30_000,
    }, () => {
        const alice = sodiumAgreeEngine.generateKeypair();
        const bob = sodiumAgreeEngine.generateKeypair();
        const charlie = sodiumAgreeEngine.generateKeypair();

        const shared1 = sodiumAgreeEngine.agree(alice.secretKey, bob.publicKey);
        const shared2 = sodiumAgreeEngine.agree(
            alice.secretKey,
            charlie.publicKey
        );

        expect(shared1).not.toEqual(shared2);
    });
});