import { expect } from 'chai';

import {
  DigitDecompositionEventDescriptorV0,
  EnumEventDescriptorV0,
} from '../../lib/messages/EventDescriptor';
import { OracleEventV0 } from '../../lib/messages/OracleEventV0';

describe('OracleEventV0', () => {
  const oracleNonce = Buffer.from(
    '3cfba011378411b20a5ab773cb95daab93e9bcd1e4cce44986a7dda84e01841b',
    'hex',
  );

  const eventId = Buffer.from('64756d6d79', 'hex');

  describe('serialize', () => {
    it('serializes', () => {
      const instance = new OracleEventV0();

      instance.length = BigInt(64);
      instance.oracleNonces.push(oracleNonce);
      instance.eventMaturityEpoch = 0;
      instance.eventDescriptor = EnumEventDescriptorV0.deserialize(
        Buffer.from(
          'fdd806' + // type enum_event_descriptor
            '10' + // length
            '0002' + // num_outcomes
            '06' + // outcome_1_len
            '64756d6d7931' + // outcome_1
            '06' + // outcome_2_len
            '64756d6d7932', // outcome_2
          'hex',
        ),
      );
      instance.eventId = eventId.toString();

      expect(instance.serialize().toString("hex")).to.equal(
        "fdd822" + // type oracle_event
        "40" + // length
        "0001" + // nb_nonces
        "3cfba011378411b20a5ab773cb95daab93e9bcd1e4cce44986a7dda84e01841b" + // oracle_nonces
        "00000000" + // event_maturity_epoch
        "fdd806" + // type enum_event_descriptor
        "10" + // length
        "0002" + // num_outcomes
        "06" + // outcome_1_len
        "64756d6d7931" + // outcome_1
        "06" + // outcome_2_len
        "64756d6d7932" + // outcome_2
        "05" + // event_id_length
        "64756d6d79" // event_id
      ); // prettier-ignore
    });
  });

  describe('deserialize', () => {
    it('deserializes', () => {
      const buf = Buffer.from(
        "fdd822" + // type oracle_event
        "40" + // length
        "0001" + // nb_nonces
        "3cfba011378411b20a5ab773cb95daab93e9bcd1e4cce44986a7dda84e01841b" + // oracle_nonces
        "00000000" + // event_maturity_epoch
        "fdd806" + // type enum_event_descriptor
        "10" + // length
        "0002" + // num_outcomes
        "06" + // outcome_1_len
        "64756d6d7931" + // outcome_1
        "06" + // outcome_2_len
        "64756d6d7932" + // outcome_2
        "05" + // event_id_length
        "64756d6d79" // event_id
        , "hex"
      ); // prettier-ignore

      const instance = OracleEventV0.deserialize(buf);

      expect(instance.oracleNonces[0]).to.deep.equal(oracleNonce);
      expect(instance.eventMaturityEpoch).to.equal(0);
      expect(instance.eventDescriptor.serialize().toString('hex')).to.equal(
        'fdd806' + // type enum_event_descriptor
          '10' + // length
          '0002' + // num_outcomes
          '06' + // outcome_1_len
          '64756d6d7931' + // outcome_1
          '06' + // outcome_2_len
          '64756d6d7932', // outcome_2
      );
      expect(instance.eventId).to.equal(eventId.toString());
    });
  });

  describe('validate', () => {
    const instance = new OracleEventV0();

    beforeEach(() => {
      instance.length = BigInt(64);
      instance.oracleNonces.push(oracleNonce);
      instance.eventMaturityEpoch = 0;
      instance.eventDescriptor = EnumEventDescriptorV0.deserialize(
        Buffer.from(
          'fdd806' + // type enum_event_descriptor
            '10' + // length
            '0002' + // num_outcomes
            '06' + // outcome_1_len
            '64756d6d7931' + // outcome_1
            '06' + // outcome_2_len
            '64756d6d7932', // outcome_2
          'hex',
        ),
      );
      instance.eventId = eventId.toString();
    });

    it('should not throw error', () => {
      expect(() => instance.validate()).to.not.throw();
    });

    it('should throw if eventMaturityEpoch is less than 0', () => {
      instance.eventMaturityEpoch = -1;
      expect(() => instance.validate()).to.throw();
    });

    it('should throw if oracleNonces.length !== eventDescriptor.nbDigits', () => {
      instance.eventDescriptor = DigitDecompositionEventDescriptorV0.deserialize(
        Buffer.from(
          'fdd80a' + // type
            '11' + // length
            '0002' + // base (Switch to '02' with oracle_announcement_v1)
            '00' + // isSigned
            '07' + // unit_Len
            '6274632f757364' + // btc/usd (unit)
            '00000000' + // precision
            '0011', // nb_digits
          'hex',
        ),
      ); // prettier-ignore);
      instance.oracleNonces = [];
      expect(() => instance.validate()).to.throw();
    });
  });
});