/* eslint-disable @typescript-eslint/no-explicit-any */
import { ShortChannelId } from '@node-dlc/common';
import { ILogger } from '@node-dlc/logger';
import { expect } from 'chai';

import { GossipError, GossipErrorCode } from '../../lib/gossip/GossipError';
import {
  GossipQueriesSync,
  GossipQueriesSyncState,
} from '../../lib/gossip/GossipQueriesSync';
import { ReplyChannelRangeMessage } from '../../lib/messages/ReplyChannelRangeMessage';
import { ReplyShortChannelIdsEndMessage } from '../../lib/messages/ReplyShortChannelIdsEndMessage';
import { createFakeLogger, createFakePeer, wait } from '../_test-utils';

describe('GossipQueriesSync', () => {
  let chainHash: Buffer;
  let sut: GossipQueriesSync;
  let peer: any;
  let logger: ILogger;

  beforeEach(() => {
    chainHash = Buffer.alloc(32);
    peer = createFakePeer();
    logger = createFakeLogger();
    sut = new GossipQueriesSync(chainHash, peer, logger);
  });

  it('integration - success', async () => {
    // change the default completion timeout to 50ms
    (sut as any)._syncWatcher.completeAfterMs = 50;

    // we should expect to start in the idel posion since we have not yet
    // execute the query
    expect(sut.state).to.equal(GossipQueriesSyncState.Idle);

    // Execute the query. Since this is a promise, we will resolve the test
    // when the queryRange method resolves successfully. If for some reason
    // it fails, we will reject with the error and the test will fail
    const promise = sut.queryRange();

    // At this point, the query should have been sent and we will now be
    // awaiting completion of the channel range state machine.
    expect(sut.state).to.equal(GossipQueriesSyncState.AwaitingChannelRange);

    // At this point, we should have sent a query message and we will
    // reply from the peer with a response message.
    const replyRangeMsg = new ReplyChannelRangeMessage();
    replyRangeMsg.fullInformation = true;
    replyRangeMsg.firstBlocknum = 0;
    replyRangeMsg.numberOfBlocks = 0xffffffff;
    replyRangeMsg.shortChannelIds.push(new ShortChannelId(1, 1, 1));
    sut.handleWireMessage(replyRangeMsg);
    await wait(0); // wait for promise to tick

    // After the reply, we will validate that the
    expect(sut.state).to.equal(GossipQueriesSyncState.AwaitingChannels);

    // At this point, we have sent along our channels query and are waiting
    // for the channels query result along with
    const replyChannelsMsg = new ReplyShortChannelIdsEndMessage();
    replyChannelsMsg.complete = true;
    sut.handleWireMessage(replyChannelsMsg);
    await wait(0); // wait for promise to tick

    // After this reply, we are just waiting for the final messages to
    // arrive
    expect(sut.state).to.equal(GossipQueriesSyncState.AwaitingMessages);

    // now we just need to wait for things to finalize and we will double
    // the completion timeout
    await wait(100);

    // finally the promise should be resolve or rejected at this
    await promise;
  });

  it('integration - rejects on range failure', async () => {
    // we should expect to start in the idel posion since we have not yet
    // execute the query
    expect(sut.state).to.equal(GossipQueriesSyncState.Idle);

    // Execute the query. Since this is a promise, we will resolve the test
    // when the queryRange method resolves successfully. If for some reason
    // it fails, we will reject with the error and the test will fail
    const promise = sut.queryRange();

    // At this point, the query should have been sent and we will now be
    // awaiting completion of the channel range state machine.
    expect(sut.state).to.equal(GossipQueriesSyncState.AwaitingChannelRange);

    // At this point, we should have sent a query message and we will
    // reply from the peer with a response message.
    const replyRangeMsg = new ReplyChannelRangeMessage();
    replyRangeMsg.fullInformation = false;
    replyRangeMsg.firstBlocknum = 0;
    replyRangeMsg.numberOfBlocks = 0xffffffff;
    sut.handleWireMessage(replyRangeMsg);

    // Wait for the promise to fail
    return promise.catch((err: GossipError) => {
      // The state should now be failed
      expect(sut.state).to.equal(GossipQueriesSyncState.Failed);

      // The error should be a RangeQuery failure
      expect(err.code).to.equal(GossipErrorCode.ReplyChannelRangeNoInformation);
    });
  });

  it('integration - rejects on channels failure', async () => {
    // we should expect to start in the idel posion since we have not yet
    // execute the query
    expect(sut.state).to.equal(GossipQueriesSyncState.Idle);

    // Execute the query. Since this is a promise, we will resolve the test
    // when the queryRange method resolves successfully. If for some reason
    // it fails, we will reject with the error and the test will fail
    const promise = sut.queryRange();

    // At this point, the query should have been sent and we will now be
    // awaiting completion of the channel range state machine.
    expect(sut.state).to.equal(GossipQueriesSyncState.AwaitingChannelRange);

    // At this point, we should have sent a query message and we will
    // reply from the peer with a response message.
    const replyRangeMsg = new ReplyChannelRangeMessage();
    replyRangeMsg.fullInformation = true;
    replyRangeMsg.firstBlocknum = 0;
    replyRangeMsg.numberOfBlocks = 0xffffffff;
    replyRangeMsg.shortChannelIds.push(new ShortChannelId(1, 1, 1));
    sut.handleWireMessage(replyRangeMsg);
    await wait(0); // wait for promise to tick

    // After the reply, we will validate that the
    expect(sut.state).to.equal(GossipQueriesSyncState.AwaitingChannels);

    // At this point, we have sent along our channels query and are waiting
    // for the channels query result along with
    const replyChannelsMsg = new ReplyShortChannelIdsEndMessage();
    replyChannelsMsg.complete = false;
    sut.handleWireMessage(replyChannelsMsg);

    // Wait for the promise to fail
    return promise.catch((err: GossipError) => {
      // The state should now be failed
      expect(sut.state).to.equal(GossipQueriesSyncState.Failed);

      // The error should be a RangeQuery failure
      expect(err.code).to.equal(GossipErrorCode.ReplyChannelsNoInfo);
    });
  });

  it('integration - large reply', async () => {
    // change the default completion timeout to 50ms
    (sut as any)._syncWatcher.completeAfterMs = 50;

    // we should expect to start in the idel posion since we have not yet
    // execute the query
    expect(sut.state).to.equal(GossipQueriesSyncState.Idle);

    // Execute the query. Since this is a promise, we will resolve the test
    // when the queryRange method resolves successfully. If for some reason
    // it fails, we will reject with the error and the test will fail
    const promise = sut.queryRange();

    // At this point, the query should have been sent and we will now be
    // awaiting completion of the channel range state machine.
    expect(sut.state).to.equal(GossipQueriesSyncState.AwaitingChannelRange);

    // Let's handle ~96,000 replies split across
    const messages = 12;
    for (let i = 0; i < messages; i++) {
      const scids = [];
      for (let j = 0; j < 8000; j++) {
        scids.push(new ShortChannelId(i * 8000 + j, 0, 0));
      }
      const replyRangeMsg = new ReplyChannelRangeMessage();
      replyRangeMsg.fullInformation = i === messages - 1;
      replyRangeMsg.firstBlocknum = i * 8000;
      replyRangeMsg.numberOfBlocks = 1;
      replyRangeMsg.shortChannelIds = scids;
      sut.handleWireMessage(replyRangeMsg);
      await wait(0); // wait for promise to tick
    }

    // After the reply, we will validate that the
    expect(sut.state).to.equal(GossipQueriesSyncState.AwaitingChannels);

    // Now we need to wait for each of the sent batches to complete
    while (sut.state !== GossipQueriesSyncState.AwaitingMessages) {
      const replyChannelsMsg = new ReplyShortChannelIdsEndMessage();
      replyChannelsMsg.complete = true;
      sut.handleWireMessage(replyChannelsMsg);
      await wait(0); // wait for promise to tick
    }

    // now we just need to wait for things to finalize and we will double
    // the completion timeout
    await wait(100);

    // finally the promise should be resolve or rejected at this
    await promise;
  });
});