import {utils} from 'ethers';
import {toNitroState} from '@statechannels/wallet-core';

import {appBytecode, COUNTING_APP_DEFINITION} from '../models/__test__/fixtures/app-bytecode';
import {createState} from '../engine/__test__/fixtures/states';
import {validateAppTransitionWithEVM} from '../evm-validator';

const UNDEFINED_APP_DEFINITION = '0x88c26ec40DC653973C599A1a0762678e795F879F';

it('returns true for a valid transition', () => {
  const fromState = toNitroState(
    createState({
      appDefinition: COUNTING_APP_DEFINITION,
      appData: utils.defaultAbiCoder.encode(['uint256'], [1]),
    })
  );
  const toState = toNitroState(
    createState({
      appDefinition: COUNTING_APP_DEFINITION,
      appData: utils.defaultAbiCoder.encode(['uint256'], [2]),
    })
  );
  expect(
    validateAppTransitionWithEVM(fromState, toState, appBytecode().appBytecode)
  ).toMatchObject({success: true});
});

it('returns false for an invalid transition', () => {
  const fromState = toNitroState(
    createState({
      appDefinition: COUNTING_APP_DEFINITION,
      appData: utils.defaultAbiCoder.encode(['uint256'], [2]),
    })
  );
  const toState = toNitroState(
    createState({
      appDefinition: COUNTING_APP_DEFINITION,
      appData: utils.defaultAbiCoder.encode(['uint256'], [1]),
    })
  );
  expect(
    validateAppTransitionWithEVM(fromState, toState, appBytecode().appBytecode)
  ).toMatchObject({success: false});
});

it('returns false when no byte code exists for the app definition', () => {
  const state = toNitroState(
    createState({
      appDefinition: UNDEFINED_APP_DEFINITION,
    })
  );
  expect(validateAppTransitionWithEVM(state, state, '0x00')).toMatchObject({success: false});
});