/*
 * Copyright (C) 2018, 2019 StApps
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <https://www.gnu.org/licenses/>.
 */
import * as chai from 'chai';
import {expect} from 'chai';
import * as chaiAsPromised from 'chai-as-promised';
import {slow, suite, test, timeout} from 'mocha-typescript';
import * as sinon from 'sinon';
import {Logger} from '../src/Logger';
import {DummyTransport} from './Transport.spec';

chai.should();
chai.use(chaiAsPromised);

@suite(timeout(2000), slow(1000))
export class LoggerSpec {
  @test
  async error() {
    const stub = sinon.stub(console, 'error');

    await Logger.error('Foobar');

    stub.restore();

    expect(stub.args[0][0]).contains('[ERROR]');
    expect(stub.args[0][0]).contains('Foobar');
  }

  @test
  async errorInProductiveEnvironment() {
    const errorStub = sinon.stub(console, 'error');

    const nodeEnv = process.env.NODE_ENV;
    process.env.NODE_ENV = 'production';

    await Logger.error('Foobar').should.be.rejectedWith(Error);
    expect(errorStub.callCount).to.be.equal(1);

    process.env.ALLOW_NO_TRANSPORT = 'true';

    await Logger.error('Foobar').should.not.be.rejectedWith(Error);
    expect(errorStub.callCount).to.be.equal(2);

    delete process.env.ALLOW_NO_TRANSPORT;

    Logger.setTransport(new DummyTransport());

    await Logger.error('Foobar').should.not.be.rejectedWith(Error);
    expect(errorStub.callCount).to.be.equal(3);

    Logger.setTransport();

    process.env.NODE_ENV = nodeEnv;

    errorStub.restore();
  }

  @test
  async errorNoOutput() {
    const stub = sinon.stub(console, 'error');

    process.env.STAPPS_LOG_LEVEL = '0';

    await Logger.error('Foobar');

    stub.restore();

    delete process.env.STAPPS_LOG_LEVEL;

    return expect(stub.called).to.be.false;
  }

  @test
  async errorWithError() {
    const e = new Error();
    const stub = sinon.stub(console, 'error');

    await Logger.error(e);

    stub.restore();

    expect(stub.args[0][0]).contains('Error').contains('at').contains(process.cwd());
  }

  @test
  getLogLevel() {
    const savedProcess = process;

    // @ts-ignore
    process = undefined;

    (global as any).window = {
      STAPPS_LOG_LEVEL: 0,
    };

    const stub = sinon.stub(console, 'info');

    Logger.info('Foobar');

    stub.restore();

    process = savedProcess;

    delete (global as any).window;

    return expect(stub.called).to.be.false;
  }

  @test
  info() {
    const stub = sinon.stub(console, 'info');

    Logger.info('Foobar');

    stub.restore();

    expect(stub.args[0][0]).contains('[INFO]');
    expect(stub.args[0][0]).contains('Foobar');
  }

  @test
  infoNoOutput() {
    const stub = sinon.stub(console, 'info');

    process.env.STAPPS_LOG_LEVEL = '0';

    Logger.info('Foobar');

    stub.restore();

    delete process.env.STAPPS_LOG_LEVEL;

    return expect(stub.called).to.be.false;
  }

  @test
  initialized() {
    Logger.setTransport(new DummyTransport());

    expect(() => {
      Logger.initialized();
    }).not.to.throw();

    Logger.setTransport();
  }

  @test
  initializedInProductiveEnvironment() {
    const nodeEnv = process.env.NODE_ENV;
    process.env.NODE_ENV = 'production';

    Logger.setTransport(new DummyTransport());

    expect(() => {
      Logger.initialized();
    }).not.to.throw();

    Logger.setTransport();

    expect(() => {
      Logger.initialized();
    }).to.throw();

    const stub = sinon.stub(console, 'warn');

    process.env.ALLOW_NO_TRANSPORT = 'true';

    expect(() => {
      Logger.initialized();
    }).not.to.throw();

    delete process.env.ALLOW_NO_TRANSPORT;

    expect(stub.called).to.be.equal(true);

    stub.restore();

    process.env.NODE_ENV = nodeEnv;
  }

  @test
  log() {
    const stub = sinon.stub(console, 'log');

    Logger.log('Foobar');

    stub.restore();

    expect(stub.args[0][0]).contains('[LOG]');
    expect(stub.args[0][0]).contains('Foobar');
  }

  @test
  logNoOutput() {
    const stub = sinon.stub(console, 'log');

    process.env.STAPPS_LOG_LEVEL = '0';

    Logger.log('Foobar');

    stub.restore();

    delete process.env.STAPPS_LOG_LEVEL;

    return expect(stub.called).to.be.false;
  }

  @test
  ok() {
    const stub = sinon.stub(console, 'log');

    Logger.ok('Foobar');

    stub.restore();

    expect(stub.args[0][0]).contains('[OK]');
    expect(stub.args[0][0]).contains('Foobar');
  }

  @test
  okNoOutput() {
    const stub = sinon.stub(console, 'log');

    process.env.STAPPS_LOG_LEVEL = '0';

    Logger.ok('Foobar');

    stub.restore();

    delete process.env.STAPPS_LOG_LEVEL;

    return expect(stub.called).to.be.false;
  }

  @test
  setTransport() {
    expect(() => {
      Logger.setTransport(new DummyTransport());
      Logger.setTransport();
    }).not.to.throw();
  }

  @test
  stringifyArguments() {
    const stub = sinon.stub(console, 'log');

    Logger.log('foo', 'bar');

    stub.restore();

    expect(stub.args[0][0]).contains('[LOG]');
    expect(stub.args[0][0]).contains('foo');
    expect(stub.args[0][0]).contains('bar');
  }

  @test
  warn() {
    const stub = sinon.stub(console, 'warn');

    Logger.warn('Foobar');

    stub.restore();

    expect(stub.args[0][0]).contains('[WARN]');
    expect(stub.args[0][0]).contains('Foobar');
  }

  @test
  warnNoOutput() {
    const stub = sinon.stub(console, 'warn');

    process.env.STAPPS_LOG_LEVEL = '0';

    Logger.warn('Foobar');

    stub.restore();

    delete process.env.STAPPS_LOG_LEVEL;

    return expect(stub.called).to.be.false;
  }
}