import { ethers, abacus } from 'hardhat';
import { expect } from 'chai';

import {
  TestHome__factory,
  TestReplica__factory,
  TestXAppConnectionManager,
  TestXAppConnectionManager__factory,
  TestReplica,
} from '../typechain';
import { Updater } from './lib/core';
import { Signer } from './lib/types';

const signedFailureTestCases = require('../../../vectors/signedFailure.json');

const ONLY_OWNER_REVERT_MSG = 'Ownable: caller is not the owner';
const localDomain = 1000;
const remoteDomain = 2000;
const processGas = 850000;
const reserveGas = 15000;
const optimisticSeconds = 3;

describe('XAppConnectionManager', async () => {
  let connectionManager: TestXAppConnectionManager,
    enrolledReplica: TestReplica,
    signer: Signer,
    updater: Updater;

  before(async () => {
    [signer] = await ethers.getSigners();
    updater = await Updater.fromSigner(signer, localDomain);
  });

  beforeEach(async () => {
    const homeFactory = new TestHome__factory(signer);
    const home = await homeFactory.deploy(localDomain);

    const replicaFactory = new TestReplica__factory(signer);
    enrolledReplica = await replicaFactory.deploy(
      localDomain,
      processGas,
      reserveGas,
    );
    await enrolledReplica.initialize(
      remoteDomain,
      updater.address,
      ethers.constants.HashZero,
      optimisticSeconds,
    );

    const connectionManagerFactory = new TestXAppConnectionManager__factory(
      signer,
    );
    connectionManager = await connectionManagerFactory.deploy();
    await connectionManager.setHome(home.address);
    await connectionManager.ownerEnrollReplica(
      enrolledReplica.address,
      remoteDomain,
    );
  });

  it('Returns the local domain', async () => {
    expect(await connectionManager!.localDomain()).to.equal(localDomain);
  });

  it('onlyOwner function rejects call from non-owner', async () => {
    const [nonHome, nonOwner] = await ethers.getSigners();
    await expect(
      connectionManager.connect(nonOwner).setHome(nonHome.address),
    ).to.be.revertedWith(ONLY_OWNER_REVERT_MSG);
  });

  it('isReplica returns true for enrolledReplica and false for non-enrolled Replica', async () => {
    const [nonEnrolledReplica] = await ethers.getSigners();
    expect(await connectionManager.isReplica(enrolledReplica.address)).to.be
      .true;
    expect(await connectionManager.isReplica(nonEnrolledReplica.address)).to.be
      .false;
  });

  it('Allows owner to set the home', async () => {
    const homeFactory = new TestHome__factory(signer);
    const newHome = await homeFactory.deploy(localDomain);

    await connectionManager.setHome(newHome.address);
    expect(await connectionManager.home()).to.equal(newHome.address);
  });

  it('Owner can enroll a new replica', async () => {
    const newRemoteDomain = 3000;
    const replicaFactory = new TestReplica__factory(signer);
    const newReplica = await replicaFactory.deploy(
      localDomain,
      processGas,
      reserveGas,
    );

    // Assert new replica not considered replica before enrolled
    expect(await connectionManager.isReplica(newReplica.address)).to.be.false;

    await expect(
      connectionManager.ownerEnrollReplica(newReplica.address, newRemoteDomain),
    ).to.emit(connectionManager, 'ReplicaEnrolled');

    expect(await connectionManager.domainToReplica(newRemoteDomain)).to.equal(
      newReplica.address,
    );
    expect(
      await connectionManager.replicaToDomain(newReplica.address),
    ).to.equal(newRemoteDomain);
    expect(await connectionManager.isReplica(newReplica.address)).to.be.true;
  });

  it('Owner can unenroll a replica', async () => {
    await expect(
      connectionManager.ownerUnenrollReplica(enrolledReplica.address),
    ).to.emit(connectionManager, 'ReplicaUnenrolled');

    expect(
      await connectionManager.replicaToDomain(enrolledReplica.address),
    ).to.equal(0);
    expect(await connectionManager.domainToReplica(localDomain)).to.equal(
      ethers.constants.AddressZero,
    );
    expect(await connectionManager.isReplica(enrolledReplica.address)).to.be
      .false;
  });

  it('Owner can set watcher permissions', async () => {
    const [watcher] = await ethers.getSigners();
    expect(
      await connectionManager.watcherPermission(watcher.address, remoteDomain),
    ).to.be.false;

    await expect(
      connectionManager.setWatcherPermission(
        watcher.address,
        remoteDomain,
        true,
      ),
    ).to.emit(connectionManager, 'WatcherPermissionSet');

    expect(
      await connectionManager.watcherPermission(watcher.address, remoteDomain),
    ).to.be.true;
  });

  it('Unenrolls a replica given valid SignedFailureNotification', async () => {
    // Set watcher permissions for domain of currently enrolled replica
    const [watcher] = await ethers.getSigners();
    await connectionManager.setWatcherPermission(
      watcher.address,
      remoteDomain,
      true,
    );

    // Create signed failure notification and signature
    const { failureNotification, signature } =
      await abacus.signedFailureNotification(
        watcher,
        remoteDomain,
        await updater.signer.getAddress(),
      );

    // Assert new replica considered replica before unenrolled
    expect(await connectionManager.isReplica(enrolledReplica.address)).to.be
      .true;

    // Unenroll replica using data + signature
    await expect(
      connectionManager.unenrollReplica(
        failureNotification.domain,
        failureNotification.updaterBytes32,
        signature,
      ),
    ).to.emit(connectionManager, 'ReplicaUnenrolled');

    expect(
      await connectionManager.replicaToDomain(enrolledReplica.address),
    ).to.equal(0);
    expect(await connectionManager.domainToReplica(localDomain)).to.equal(
      ethers.constants.AddressZero,
    );
    expect(await connectionManager.isReplica(enrolledReplica.address)).to.be
      .false;
  });

  it('unenrollReplica reverts if there is no replica for provided domain', async () => {
    const noReplicaDomain = 3000;

    // Set watcher permissions for noReplicaDomain
    const [watcher] = await ethers.getSigners();
    await connectionManager.setWatcherPermission(
      watcher.address,
      noReplicaDomain,
      true,
    );

    // Create signed failure notification and signature for noReplicaDomain
    const { failureNotification, signature } =
      await abacus.signedFailureNotification(
        watcher,
        noReplicaDomain,
        await updater.signer.getAddress(),
      );

    // Expect unenrollReplica call to revert
    await expect(
      connectionManager.unenrollReplica(
        failureNotification.domain,
        failureNotification.updaterBytes32,
        signature,
      ),
    ).to.be.revertedWith('!replica exists');
  });

  it('unenrollReplica reverts if provided updater does not match replica updater', async () => {
    const [watcher, nonUpdater] = await ethers.getSigners();

    // Set watcher permissions
    await connectionManager.setWatcherPermission(
      watcher.address,
      remoteDomain,
      true,
    );

    // Create signed failure notification and signature with nonUpdater
    const { failureNotification, signature } =
      await abacus.signedFailureNotification(
        watcher,
        remoteDomain,
        nonUpdater.address,
      );

    // Expect unenrollReplica call to revert
    await expect(
      connectionManager.unenrollReplica(
        failureNotification.domain,
        failureNotification.updaterBytes32,
        signature,
      ),
    ).to.be.revertedWith('!current updater');
  });

  it('unenrollReplica reverts if incorrect watcher provided', async () => {
    const [watcher, nonWatcher] = await ethers.getSigners();

    // Set watcher permissions
    await connectionManager.setWatcherPermission(
      watcher.address,
      remoteDomain,
      true,
    );

    // Create signed failure notification and signature with nonWatcher
    const { failureNotification, signature } =
      await abacus.signedFailureNotification(
        nonWatcher,
        remoteDomain,
        await updater.signer.getAddress(),
      );

    // Expect unenrollReplica call to revert
    await expect(
      connectionManager.unenrollReplica(
        failureNotification.domain,
        failureNotification.updaterBytes32,
        signature,
      ),
    ).to.be.revertedWith('!valid watcher');
  });

  it('Checks Rust-produced SignedFailureNotification', async () => {
    // Compare Rust output in json file to solidity output
    const testCase = signedFailureTestCases[0];
    const { domain, updater, signature, signer } = testCase;

    await enrolledReplica.setUpdater(updater);
    await connectionManager.setWatcherPermission(signer, domain, true);

    // Just performs signature recovery (not dependent on replica state, just
    // tests functionality)
    const watcher = await connectionManager.testRecoverWatcherFromSig(
      domain,
      enrolledReplica.address,
      updater,
      ethers.utils.joinSignature(signature),
    );

    expect(watcher.toLowerCase()).to.equal(signer);
  });
});