import { expect } from 'chai';
import * as sinon from 'sinon';
import { GroupUtils } from '../../../session/utils';
import { Stubs, TestUtils } from '../../../test/test-utils';
import { MessageQueue } from '../../../session/sending/MessageQueue';
import { OpenGroupMessage } from '../../../session/messages/outgoing';
import { PubKey, RawMessage } from '../../../session/types';
import { UserUtil } from '../../../util';
import { MessageSender } from '../../../session/sending';
import { toRawMessage } from '../../../session/utils/Messages';
import { SessionProtocol } from '../../../session/protocols';
import { PendingMessageCache } from '../../../session/sending/PendingMessageCache';

// Equivalent to Data.StorageItem
interface StorageItem {
  id: string;
  value: any;
}

describe('MessageQueue', () => {
  // Initialize new stubbed cache
  let data: StorageItem;
  const sandbox = sinon.createSandbox();
  const ourNumber = TestUtils.generateFakePubkey().key;

  // Initialize new stubbed cache
  let messageQueueStub: MessageQueue;
  // Message Sender Stubs
  let sendStub: sinon.SinonStub<[RawMessage, (number | undefined)?]>;
  let sendToOpenGroupStub: sinon.SinonStub<[OpenGroupMessage]>;
  // Group Utils Stubs
  let groupMembersStub: sinon.SinonStub;
  // Session Protocol Stubs
  let hasSessionStub: sinon.SinonStub<[PubKey]>;
  let sendSessionRequestIfNeededStub: sinon.SinonStub<[PubKey]>;

  let sessionRequestCalled: boolean;

  beforeEach(async () => {
    // Stub out methods which touch the database
    const storageID = 'pendingMessages';
    data = {
      id: storageID,
      value: '[]',
    };

    // Pending Message Cache Data Stubs
    TestUtils.stubData('getItemById')
      .withArgs('pendingMessages')
      .callsFake(async () => {
        return data;
      });
    TestUtils.stubData('createOrUpdateItem').callsFake((item: StorageItem) => {
      if (item.id === storageID) {
        data = item;
      }
    });

    // Utils Stubs
    sandbox.stub(UserUtil, 'getCurrentDevicePubKey').resolves(ourNumber);
    TestUtils.stubData('getPairedDevicesFor').callsFake(async () => {
      return TestUtils.generateMemberList(2);
    });
    TestUtils.stubWindow('libsignal', {
      SignalProtocolAddress: sandbox.stub(),
      SessionCipher: Stubs.SessionCipherStub,
    } as any);

    // Message Sender Stubs
    sendStub = sandbox.stub(MessageSender, 'send').resolves();
    sendToOpenGroupStub = sandbox
      .stub(MessageSender, 'sendToOpenGroup')
      .resolves(true);

    // Group Utils Stubs
    sandbox
      .stub(GroupUtils, 'isMediumGroup')
      .returns(false);
    groupMembersStub = sandbox
      .stub(GroupUtils, 'getGroupMembers' as any)
      .callsFake(async () => TestUtils.generateMemberList(10));

    // Session Protocol Stubs
    // sessionRequestCalled used instead of sendSessionRequestIfNeededStub.callCount because the call couunt was not registered from methods inside the stubbed MessageQueue.
    sendSessionRequestIfNeededStub = sandbox.stub(SessionProtocol, 'sendSessionRequestIfNeeded').callsFake(async (pubkey: PubKey) => {
      pubkey;
      sessionRequestCalled = true;
    });
    sandbox.stub(SessionProtocol, 'sendSessionRequest').resolves();
    hasSessionStub = sandbox.stub(SessionProtocol, 'hasSession').resolves(true);

    // Pending Mesage Cache Stubs
    const chatMessages = Array.from({ length: 10 }, TestUtils.generateChatMessage);
    const rawMessage = toRawMessage(
      TestUtils.generateFakePubkey(),
      TestUtils.generateChatMessage()
    );

    sandbox.stub(PendingMessageCache.prototype, 'add').resolves(rawMessage);
    sandbox.stub(PendingMessageCache.prototype, 'remove').resolves();
    sandbox
      .stub(PendingMessageCache.prototype, 'getDevices')
      .returns(TestUtils.generateMemberList(10));
    sandbox
      .stub(PendingMessageCache.prototype, 'getForDevice')
      .returns(chatMessages.map(m => toRawMessage(TestUtils.generateFakePubkey(), m)));

    messageQueueStub = new MessageQueue();
  });

  afterEach(() => {
    sessionRequestCalled = false;

    TestUtils.restoreStubs();
    sandbox.restore();

  });

  describe('send', () => {
    
  })

  it('can send to a single device', async () => {
    const device = TestUtils.generateFakePubkey();
    const message = TestUtils.generateChatMessage();

    const promise = messageQueueStub.send(device, message);
    await expect(promise).to.be.fulfilled;
  });

  it('can send to many devices', async () => {
    const devices = TestUtils.generateMemberList(10);
    const message = TestUtils.generateChatMessage();

    const promise = messageQueueStub.sendMessageToDevices(devices, message);
    await expect(promise).to.be.fulfilled;
  });

  it('can send using multidevice', async () => {
    const device = TestUtils.generateFakePubkey();
    const message = TestUtils.generateChatMessage();

    const promise = messageQueueStub.sendUsingMultiDevice(device, message);
    await expect(promise).to.be.fulfilled;
  });

  it('can send to open group', async () => {
    const message = TestUtils.generateOpenGroupMessage();
    const success = await messageQueueStub.sendToGroup(message);

    expect(success).to.equal(true, 'sending to group failed');
  });

  it('can send to closed group', async () => {
    const message = TestUtils.generateClosedGroupMessage();
    const success = await messageQueueStub.sendToGroup(message);

    expect(success).to.equal(true, 'sending to group failed');
  });

  it('wont send message to empty closed group', async () => {
    groupMembersStub.callsFake(async () => TestUtils.generateMemberList(0));

    const message = TestUtils.generateClosedGroupMessage();
    const response = await messageQueueStub.sendToGroup(message);

    expect(response).to.equal(
      false,
      'sendToGroup send a message to an empty group'
    );
  });

  it('wont send invalid message type to group', async () => {
    // Regular chat message should return false
    const message = TestUtils.generateChatMessage();
    const response = await messageQueueStub.sendToGroup(message);

    expect(response).to.equal(
      false,
      'sendToGroup considered an invalid message type as valid'
    );
  });

  it('will send sync message if no session', async () => {
    hasSessionStub.resolves(false);

    const device = TestUtils.generateFakePubkey();
    const promise = messageQueueStub.processPending(device);

    expect(promise).to.be.fulfilled;
    expect(sessionRequestCalled).to.equal(true, 'Session request not sent for !isMediumGroup && !hasSession');
  });

  it('can send sync message', async () => {
    const devices = TestUtils.generateMemberList(3);
    const message = TestUtils.generateChatMessage();

    const promise = messageQueueStub.sendSyncMessage(message, devices);
    expect(promise).to.be.fulfilled;
  });
});