import { readFileSync } from "node:fs";
import { resolve } from "node:path";
import { describe, expect, test } from "vitest";
import { verifyPassword } from "../src/auth/password.js";

interface Argon2Vector {
  password: string;
  phc: string;
}

const vectors = JSON.parse(readFileSync(
  resolve(import.meta.dirname, "fixtures/argon2id-vectors.json"),
  "utf8",
)) as Argon2Vector[];

describe("local Argon2id password verification", () => {
  test("accepts every committed Go-generated vector", () => {
    expect(vectors.length).toBeGreaterThan(0);
    for (const vector of vectors) {
      expect(verifyPassword(vector.password, vector.phc)).toBe(true);
    }
  });

  test("rejects a one-byte password change", () => {
    for (const vector of vectors) {
      expect(verifyPassword(`${vector.password}!`, vector.phc)).toBe(false);
    }
  });

  test("rejects malformed and oversized PHC parameters before Argon2 allocation", () => {
    const password = vectors[0].password;
    const digest = vectors[0].phc.split("$")[5];
    const salt = vectors[0].phc.split("$")[4];
    const cases = [
      `$argon2id$v=19$m=262145,t=1,p=1$${salt}$${digest}`,
      `$argon2id$v=19$m=65536,t=11,p=1$${salt}$${digest}`,
      `$argon2id$v=19$m=65536,t=3,p=5$${salt}$${digest}`,
      `$argon2id$v=19$m=65536,t=3,p=1$${salt}$${"A".repeat(88)}`,
      `$argon2id$v=19$m=65536,t=3,p=1$${salt}=$${digest}`,
    ];

    for (const phc of cases) {
      expect(() => verifyPassword(password, phc)).not.toThrow();
      expect(verifyPassword(password, phc)).toBe(false);
    }
  });
});