import { describe, expect, it } from "vitest";
import { hexToBytes, utf8ToBytes } from "../../src/crypto/encoding";
import { hashOcraPassword, ocra, parseOcraSuite } from "../../src/otp/ocra";

describe("OCRA", () => {
  it("parses complete suites and rejects reordered inputs", () => {
    expect(
      parseOcraSuite("OCRA-1:HOTP-SHA512-8:C-QN08-PSHA1-S064-T1M"),
    ).toMatchObject({
      algorithm: "SHA-512",
      digits: 8,
      counter: true,
      questionFormat: "numeric",
      passwordAlgorithm: "SHA-1",
      sessionLength: 64,
      timeStepSeconds: 60,
    });
    expect(() => parseOcraSuite("OCRA-1:HOTP-SHA1-6:QN08-T1M-PSHA1")).toThrow(
      /order/iu,
    );
  });

  it("matches RFC 6287 one-way challenge vectors", async () => {
    const secret = utf8ToBytes("12345678901234567890");
    const expected = [
      "237653",
      "243178",
      "653583",
      "740991",
      "608993",
      "388898",
      "816933",
      "224598",
      "750600",
      "294470",
    ];
    for (let index = 0; index < expected.length; index += 1) {
      await expect(
        ocra({
          suite: "OCRA-1:HOTP-SHA1-6:QN08",
          secret,
          question: String(index).repeat(8),
        }),
      ).resolves.toBe(expected[index]);
    }
  });

  it("matches RFC 6287 counter/PIN and timestamp vectors", async () => {
    const secret32 = utf8ToBytes("12345678901234567890123456789012");
    const pinHash = await hashOcraPassword("1234", "SHA-1");
    expect([...pinHash]).toEqual([
      ...hexToBytes("7110eda4d09e062aa5e4a390b0a572ac0d2c0220"),
    ]);
    await expect(
      ocra({
        suite: "OCRA-1:HOTP-SHA256-8:C-QN08-PSHA1",
        secret: secret32,
        counter: 0n,
        question: "12345678",
        passwordHash: pinHash,
      }),
    ).resolves.toBe("65347737");
    const secret64 = utf8ToBytes(
      "1234567890123456789012345678901234567890123456789012345678901234",
    );
    await expect(
      ocra({
        suite: "OCRA-1:HOTP-SHA512-8:QN08-T1M",
        secret: secret64,
        question: "00000000",
        timeStep: 0x132d0b6n,
      }),
    ).resolves.toBe("95209754");
  });
});