/*
 * Copyright 2022 gRPC authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

import * as assert from 'assert';
import * as path from 'path';
import * as grpc from '../src';
import {
  sendUnaryData,
  Server,
  ServerCredentials,
  ServerUnaryCall,
  ServiceClientConstructor,
  ServiceError,
} from '../src';
import { loadProtoFile } from './common';

const protoFile = path.join(__dirname, 'fixtures', 'echo_service.proto');
const echoService = loadProtoFile(protoFile)
  .EchoService as ServiceClientConstructor;

describe('Local subchannel pool', () => {
  let server: Server;
  let serverPort: number;

  before(done => {
    server = new Server();
    server.addService(echoService.service, {
      echo(call: ServerUnaryCall<any, any>, callback: sendUnaryData<any>) {
        callback(null, call.request);
      },
    });

    server.bindAsync(
      'localhost:0',
      ServerCredentials.createInsecure(),
      (err, port) => {
        assert.ifError(err);
        serverPort = port;
        server.start();
        done();
      }
    );
  });

  after(done => {
    server.tryShutdown(done);
  });

  it('should complete the client lifecycle without error', done => {
    const client = new echoService(
      `localhost:${serverPort}`,
      grpc.credentials.createInsecure(),
      { 'grpc.use_local_subchannel_pool': 1 }
    );
    client.echo(
      { value: 'test value', value2: 3 },
      (error: ServiceError, response: any) => {
        assert.ifError(error);
        assert.deepStrictEqual(response, { value: 'test value', value2: 3 });
        client.close();
        done();
      }
    );
  });
});