'use strict';

const expect = require('chai').expect;
const sinon = require('sinon');
const path = require('path');
const BbPromise = require('bluebird');
const AwsProvider = require('../../provider/awsProvider');
const AwsDeploy = require('../index');
const Serverless = require('../../../../Serverless');
const testUtils = require('../../../../../tests/utils');

describe('createStack', () => {
  let awsDeploy;
  const tmpDirPath = testUtils.getTmpDirPath();

  const serverlessYmlPath = path.join(tmpDirPath, 'serverless.yml');
  const serverlessYml = {
    service: 'first-service',
    provider: 'aws',
    functions: {
      first: {
        handler: 'sample.handler',
      },
    },
  };

  beforeEach(() => {
    const serverless = new Serverless();
    serverless.setProvider('aws', new AwsProvider(serverless));
    serverless.utils.writeFileSync(serverlessYmlPath, serverlessYml);
    serverless.config.servicePath = tmpDirPath;
    const options = {
      stage: 'dev',
      region: 'us-east-1',
    };
    awsDeploy = new AwsDeploy(serverless, options);
    awsDeploy.serverless.service.service = `service-${(new Date()).getTime().toString()}`;
    awsDeploy.serverless.cli = new serverless.classes.CLI();
  });

  describe('#create()', () => {
    it('should create a stack with the core CloudFormation template', () => {
      const coreCloudFormationTemplate = awsDeploy.serverless.utils.readFileSync(
        path.join(__dirname,
          '..',
          'lib',
          'core-cloudformation-template.json')
      );

      awsDeploy.serverless.service.provider
        .compiledCloudFormationTemplate = coreCloudFormationTemplate;

      const createStackStub = sinon
        .stub(awsDeploy.provider, 'request').returns(BbPromise.resolve());
      sinon.stub(awsDeploy, 'monitorStack').returns(BbPromise.resolve());
      return awsDeploy.create().then(() => {
        expect(createStackStub.calledOnce).to.be.equal(true);
        expect(createStackStub.calledWithExactly(
          'CloudFormation',
          'createStack',
          {
            StackName: `${awsDeploy.serverless.service.service}-${awsDeploy.options.stage}`,
            OnFailure: 'ROLLBACK',
            Capabilities: ['CAPABILITY_IAM'],
            Parameters: [],
            TemplateBody: JSON.stringify(coreCloudFormationTemplate),
            Tags: [{ Key: 'STAGE', Value: awsDeploy.options.stage }],
          },
          awsDeploy.options.stage,
          awsDeploy.options.region
        )).to.be.equal(true);
        awsDeploy.provider.request.restore();
        awsDeploy.monitorStack.restore();
      });
    });

    it('should include custom stack tags', () => {
      awsDeploy.serverless.service.provider.stackTags = { STAGE: 'overridden', tag1: 'value1' };

      const createStackStub = sinon
        .stub(awsDeploy.provider, 'request').returns(BbPromise.resolve());
      sinon.stub(awsDeploy, 'monitorStack').returns(BbPromise.resolve());

      return awsDeploy.create().then(() => {
        expect(createStackStub.args[0][2].Tags)
          .to.deep.equal([
            { Key: 'STAGE', Value: 'overridden' },
            { Key: 'tag1', Value: 'value1' },
          ]);
        awsDeploy.provider.request.restore();
        awsDeploy.monitorStack.restore();
      });
    });
  });

  describe('#createStack()', () => {
    it('should store the core CloudFormation template in the provider object', () => {
      sinon.stub(awsDeploy.provider, 'request').returns(BbPromise.resolve());

      const coreCloudFormationTemplate = awsDeploy.serverless.utils.readFileSync(
        path.join(__dirname,
          '..',
          'lib',
          'core-cloudformation-template.json')
      );

      awsDeploy.serverless.service.provider
        .compiledCloudFormationTemplate = coreCloudFormationTemplate;

      const writeCreateTemplateToDiskStub = sinon
        .stub(awsDeploy, 'writeCreateTemplateToDisk').returns(BbPromise.resolve());

      return awsDeploy.createStack().then(() => {
        expect(writeCreateTemplateToDiskStub.calledOnce).to.be.equal(true);
        expect(awsDeploy.serverless.service.provider.compiledCloudFormationTemplate)
          .to.deep.equal(coreCloudFormationTemplate);
      });
    });

    it('should resolve if stack already created', () => {
      const createStub = sinon
        .stub(awsDeploy, 'create').returns(BbPromise.resolve());

      sinon.stub(awsDeploy.provider, 'request').returns(BbPromise.resolve());

      return awsDeploy.createStack().then(() => {
        expect(createStub.called).to.be.equal(false);
      });
    });

    it('should resolve if the noDeploy option is used', () => {
      awsDeploy.options.noDeploy = true;

      const writeCreateTemplateToDiskStub = sinon
        .stub(awsDeploy, 'writeCreateTemplateToDisk').returns(BbPromise.resolve());
      const createStub = sinon
        .stub(awsDeploy, 'create').returns(BbPromise.resolve());
      const awsRequestStub = sinon
        .stub(awsDeploy.provider, 'request')
        .returns(BbPromise.reject({ message: 'does not exist' }));

      return awsDeploy.createStack().then(() => {
        expect(awsRequestStub.args[0][0]).to.equal('CloudFormation');
        expect(awsRequestStub.args[0][1]).to.equal('describeStackResources');
        expect(awsRequestStub.args[0][2].StackName)
          .to.equal(`${awsDeploy.serverless.service.service}-${awsDeploy.options.stage}`);
        expect(writeCreateTemplateToDiskStub.calledOnce).to.be.equal(true);
        expect(createStub.called).to.be.equal(false);
      });
    });

    it('should set the createLater flag and resolve if deployment bucket is provided', () => {
      awsDeploy.serverless.service.provider.deploymentBucket = 'serverless';

      sinon.stub(awsDeploy, 'writeCreateTemplateToDisk').returns(BbPromise.resolve());
      sinon.stub(awsDeploy.provider, 'request')
        .returns(BbPromise.reject({ message: 'does not exist' }));

      return awsDeploy.createStack().then(() => {
        expect(awsDeploy.createLater).to.equal(true);
      });
    });

    it('should write the template to disk even if we do not specify the noDeploy option', () => {
      awsDeploy.options.noDeploy = false;

      const writeCreateTemplateToDiskStub = sinon
        .stub(awsDeploy, 'writeCreateTemplateToDisk').returns(BbPromise.resolve());
      sinon.stub(awsDeploy.provider, 'request').returns(BbPromise.resolve());

      return awsDeploy.createStack().then((res) => {
        expect(writeCreateTemplateToDiskStub.calledOnce).to.be.equal(true);
        expect(awsDeploy.provider.request.called).to.be.equal(true);
        expect(res).to.equal('alreadyCreated');
      });
    });

    it('should throw error if describeStackResources fails for other reason than not found', () => {
      const errorMock = {
        message: 'Something went wrong.',
      };

      sinon.stub(awsDeploy.provider, 'request').returns(BbPromise.reject(errorMock));

      const createStub = sinon
        .stub(awsDeploy, 'create').returns(BbPromise.resolve());

      return awsDeploy.createStack().catch((e) => {
        expect(createStub.called).to.be.equal(false);
        expect(e.name).to.be.equal('ServerlessError');
        expect(e.message).to.be.equal(errorMock);
      });
    });

    it('should run promise chain in order', () => {
      const errorMock = {
        message: 'does not exist',
      };

      sinon.stub(awsDeploy.provider, 'request').returns(BbPromise.reject(errorMock));

      const createStub = sinon
        .stub(awsDeploy, 'create').returns(BbPromise.resolve());

      return awsDeploy.createStack().then(() => {
        expect(createStub.calledOnce).to.be.equal(true);
      });
    });
  });

  describe('#writeCreateTemplateToDisk', () => {
    it('should resolve if deployment bucket is provided', () => {
      awsDeploy.serverless.service.provider.deploymentBucket = 'serverless';
      const writeFileSyncStub = sinon.stub(awsDeploy.serverless.utils, 'writeFileSync');

      return awsDeploy.writeCreateTemplateToDisk().then(() => {
        expect(writeFileSyncStub.called).to.be.equal(false);
        awsDeploy.serverless.utils.writeFileSync.restore();
      });
    });
    it('should write the compiled CloudFormation template into the .serverless directory', () => {
      awsDeploy.serverless.service.provider.compiledCloudFormationTemplate = { key: 'value' };

      const templatePath = path.join(tmpDirPath,
        '.serverless',
        'cloudformation-template-create-stack.json');

      return awsDeploy.writeCreateTemplateToDisk().then(() => {
        expect(awsDeploy.serverless.utils.fileExistsSync(templatePath)).to.equal(true);
        expect(awsDeploy.serverless.utils.readFileSync(templatePath)).to.deep.equal(
          { key: 'value' }
        );
      });
    });
  });
});