import { TestBed } from '@angular/core/testing';

import { ServerManagementService } from './server-management.service';
import { ElectronService } from 'ngx-electron';
import { Server } from '../models/server';

describe('ServerManagementService', () => {
  let electronService;
  let callbacks
  let removed;
  let server;

  beforeEach(() => {
    callbacks = [];
    removed = [];
    server = undefined;
    electronService = {
      isElectronApp: true,
      ipcRenderer: {
        on: (channel, callback) => {
          callbacks.push({
            channel: channel,
            callback: callback
          });
        },
        removeAllListeners: (name) => {
          removed.push(name);
        }
      },
      remote: {
        require: (file) => {
          return {
            startLocalServer: (serv) => {
              server = serv;
            },
            stopLocalServer: (serv) => {
              server = serv;
            }
          }
        }
      }
    };
  })
  
  beforeEach(() => TestBed.configureTestingModule({
    providers: [
      { provide: ElectronService, useValue: electronService},
      ServerManagementService
    ]
  }));

  it('should be created', () => {
    const service: ServerManagementService = TestBed.get(ServerManagementService);
    expect(service).toBeTruthy();
  });

  it('should attach when running as electron app', () => {
    TestBed.get(ServerManagementService);
    expect(callbacks.length).toEqual(1);
    expect(callbacks[0].channel).toEqual('local-server-status-events');
  });

  it('should not attach when running as not electron app', () => {
    electronService.isElectronApp = false;
    TestBed.get(ServerManagementService);
    expect(callbacks.length).toEqual(0);
  });

  it('should deattach when running as electron app', () => {
    const service: ServerManagementService = TestBed.get(ServerManagementService);
    service.ngOnDestroy();
    expect(removed).toEqual(['local-server-status-events']);
  });

  it('should not deattach when running as not electron app', () => {
    electronService.isElectronApp = false;
    const service: ServerManagementService = TestBed.get(ServerManagementService);
    service.ngOnDestroy();
    expect(removed).toEqual([]);
  });

  it('should start local server', async () => {
    const service: ServerManagementService = TestBed.get(ServerManagementService);
    await service.start({ name: 'test'} as Server);
    expect(server).toEqual({ name: 'test'});
  });

  it('should stop local server', async () => {
    const service: ServerManagementService = TestBed.get(ServerManagementService);
    await service.stop({ name: 'test2'} as Server);
    expect(server).toEqual({ name: 'test2'});
  });
});