/*
 * Copyright (C) Sapphirecode - All Rights Reserved
 * This file is part of Auth-Server-Helper which is released under MIT.
 * See file 'LICENSE' for full license details.
 * Created by Timo Hocker <timo@scode.ovh>, December 2020
 */

import ks from '../../lib/KeyStore';

const frame = 60;

/* eslint-disable-next-line max-lines-per-function */
describe ('key store', () => {
  beforeAll (() => {
    jasmine.clock ()
      .install ();
    const base_date = (new Date);
    base_date.setSeconds (2);
    jasmine.clock ()
      .mockDate (base_date);
  });

  const keys: {key:string, sign:string, iat:number}[] = [];

  it ('should generate a new key', async () => {
    const iat = (new Date)
      .getTime () / 1000;
    const duration = 10 * frame;
    const key = await ks.get_sign_key (iat, duration);
    const sign = ks.get_key (iat);
    expect (typeof key)
      .toEqual ('string');
    expect (typeof sign)
      .toEqual ('string');
    keys.push ({ iat, key, sign });
  });

  it ('should return the generated key', async () => {
    const key = await ks.get_sign_key (keys[0].iat, 1);
    expect (key)
      .toEqual (keys[0].key);
    const sign = ks.get_key (keys[0].iat);
    expect (sign)
      .toEqual (keys[0].sign);
  });

  it ('should return the same key on a different time', async () => {
    const key = await ks.get_sign_key (keys[0].iat + (frame / 2), 1);
    expect (key)
      .toEqual (keys[0].key);
    const sign = ks.get_key (keys[0].iat + (frame / 2));
    expect (sign)
      .toEqual (keys[0].sign);
  });

  it ('should generate a new key after time frame is over', async () => {
    jasmine.clock ()
      .tick (frame * 1000);
    const iat = (new Date)
      .getTime () / 1000;
    const duration = 10 * frame;
    const key = await ks.get_sign_key (iat, duration);
    const sign = ks.get_key (iat);
    expect (typeof key)
      .toEqual ('string');
    expect (key).not.toEqual (keys[0].key);
    expect (sign).not.toEqual (keys[0].sign);
    keys.push ({ iat, key, sign });
  });

  it ('should return both keys, but not the first sign key', async () => {
    const sign = ks.get_key (keys[0].iat);
    expect (sign)
      .toEqual (keys[0].sign);
    await expectAsync (ks.get_sign_key (keys[0].iat, 1))
      .toBeRejectedWithError ('cannot access already expired keys');
    const k2 = await ks.get_sign_key (keys[1].iat, 1);
    const s2 = ks.get_key (keys[1].iat);
    expect (k2)
      .toEqual (keys[1].key);
    expect (s2)
      .toEqual (keys[1].sign);
  });

  it ('should throw on non existing key', () => {
    expect (() => ks.get_key (keys[1].iat + frame))
      .toThrowError ('key could not be found');
  });

  it ('should delete a key after it expires', () => {
    jasmine.clock ()
      .tick (10000 * frame);
    expect (() => ks.get_key (keys[0].iat))
      .toThrowError ('key could not be found');
  });

  it (
    'should still retrieve the second key, but not its sign key',
    async () => {
      await expectAsync (ks.get_sign_key (keys[1].iat, 1))
        .toBeRejectedWithError ('cannot access already expired keys');
      const sign = ks.get_key (keys[1].iat);
      expect (sign)
        .toEqual (keys[1].sign);
    }
  );

  it ('should reject key generation of expired keys', async () => {
    const iat = ((new Date)
      .getTime () / 1000) - 2;
    const duration = 5;
    await expectAsync (ks.get_sign_key (iat, duration))
      .toBeRejectedWithError ('cannot access already expired keys');
  });

  it ('key should live as long as the longest created token', async () => {
    const base = new Date;
    base.setSeconds (2, 0);
    jasmine.clock ()
      .mockDate (base);
    jasmine.clock ()
      .tick (24 * 60 * 60 * 1000);
    const iat = (new Date)
      .getTime () / 1000;
    const duration1 = frame;
    const duration2 = frame * 10;

    const key1 = await ks.get_sign_key (iat, duration1);
    const step = 0.9 * frame;
    jasmine.clock ()
      .tick (step * 1000);
    const key2 = await ks.get_sign_key (iat + step, duration2);
    const sign = ks.get_key (iat);
    expect (key1)
      .toEqual (key2);
    jasmine.clock ()
      .tick (5000 * frame);
    const signv = ks.get_key (iat + step);
    expect (signv)
      .toEqual (sign);
  });

  // TODO: required use case: insert keys for verification of old tokens

  afterAll (() => {
    jasmine.clock ()
      .tick (24 * 60 * 60 * 1000);
    jasmine.clock ()
      .uninstall ();
  });
});