'use strict';

const expect = require('chai').expect;
const sinon = require('sinon');
const os = require('os');
const path = require('path');
const AWS = require('aws-sdk');
const BbPromise = require('bluebird');
const AwsDeploy = require('../index');
const Serverless = require('../../../../Serverless');

describe('createStack', () => {
  let serverless;
  let awsDeploy;

  const tmpDirPath = path.join(os.tmpdir(), (new Date).getTime().toString());
  const serverlessEnvYamlPath = path.join(tmpDirPath, 'serverless.env.yaml');
  const serverlessEnvYaml = {
    vars: {},
    stages: {
      dev: {
        vars: {},
        regions: {
          aws_useast1: {
            vars: {},
          },
        },
      },
    },
  };

  beforeEach(() => {
    serverless = new Serverless();
    serverless.init();
    awsDeploy = new AwsDeploy(serverless);

    awsDeploy.CloudFormation = new AWS.CloudFormation({ region: 'us-east-1' });

    awsDeploy.serverless.service.service = `service-${(new Date).getTime().toString()}`;
    awsDeploy.serverless.config.servicePath = tmpDirPath;
    awsDeploy.serverless.utils.writeFileSync(serverlessEnvYamlPath, serverlessEnvYaml);
    awsDeploy.options = {
      stage: 'dev',
      region: 'us-east-1',
    };

    BbPromise.promisifyAll(awsDeploy.CloudFormation, { suffix: 'Promised' });
  });

  describe('#create()', () => {
    it('should create a stack', () => {
      awsDeploy.serverless.service.resources = { aws: {} };

      const createStackStub = sinon
        .stub(awsDeploy.CloudFormation, 'createStackPromised').returns(BbPromise.resolve());

      return awsDeploy.create().then(() => {
        expect(createStackStub.calledOnce).to.be.equal(true);
        awsDeploy.CloudFormation.createStackPromised.restore();
      });
    });
  });

  describe('#monitorCreate()', () => {
    it('should keep monitoring until CREATE_COMPLETE stack status', () => {
      const describeStub = sinon.stub(awsDeploy.CloudFormation, 'describeStacksPromised');
      const cfDataMock = {
        StackId: 'new-service-dev',
      };
      const DescribeReturn = {
        Stacks: [
          {
            StackStatus: 'CREATE_IN_PROGRESS',
          },
        ],
      };
      const finalDescribeReturn = {
        Stacks: [
          {
            StackStatus: 'CREATE_COMPLETE',
          },
        ],
      };

      describeStub.onCall(0).returns(BbPromise.resolve(DescribeReturn));
      describeStub.onCall(1).returns(BbPromise.resolve(DescribeReturn));
      describeStub.onCall(2).returns(BbPromise.resolve(finalDescribeReturn));

      return awsDeploy.monitorCreate(cfDataMock, 10).then((stack) => {
        expect(describeStub.callCount).to.be.equal(3);
        expect(stack.StackStatus).to.be.equal('CREATE_COMPLETE');
        awsDeploy.CloudFormation.describeStacksPromised.restore();
      });
    });

    it('should throw an error if CloudFormation returned unusual stack status', () => {
      const describeStub = sinon.stub(awsDeploy.CloudFormation, 'describeStacksPromised');
      const cfDataMock = {
        StackId: 'new-service-dev',
      };
      const DescribeReturn = {
        Stacks: [
          {
            StackStatus: 'CREATE_IN_PROGRESS',
          },
        ],
      };
      const finalDescribeReturn = {
        Stacks: [
          {
            StackStatus: 'UNUSUAL_STATUS',
          },
        ],
      };

      describeStub.onCall(0).returns(BbPromise.resolve(DescribeReturn));
      describeStub.onCall(1).returns(BbPromise.resolve(DescribeReturn));
      describeStub.onCall(2).returns(BbPromise.resolve(finalDescribeReturn));

      return awsDeploy.monitorCreate(cfDataMock, 10).catch((e) => {
        expect(e.name).to.be.equal('ServerlessError');
        expect(describeStub.callCount).to.be.equal(3);
        awsDeploy.CloudFormation.describeStacksPromised.restore();
      });
    });
  });

  describe('#addOutputVars()', () => {
    it('should addOutputVariables to memory and serverless.env.yaml', () => {
      const cfDataMock = {
        Outputs: [
          {
            OutputKey: 'IamRoleArnLambda',
            OutputValue: 'someValue',
          },
        ],
      };
      awsDeploy.serverless.service.environment = {
        vars: {},
        stages: {
          dev: {
            vars: {},
            regions: {
              aws_useast1: {
                vars: {},
              },
            },
          },
        },
      };

      return awsDeploy.addOutputVars(cfDataMock)
        .then(() => awsDeploy.serverless.yamlParser.parse(serverlessEnvYamlPath))
        .then((yaml) => {
          // assert var added to memory
          expect(awsDeploy.serverless.service.environment.stages.dev
            .regions.aws_useast1.vars.iamRoleArnLambda).to.be.equal('someValue');

          // assert var added to file
          expect(yaml.stages.dev
            .regions.aws_useast1.vars.iamRoleArnLambda).to.be.equal('someValue');
        });
    });
  });

  describe('#createStack()', () => {
    it('should resolve if stack already created', () => {
      awsDeploy.serverless.service.environment.stages = {
        dev: {
          regions: {
            aws_useast1: {
              vars: {
                iamRoleArnLambda: true,
              },
            },
          },
        },
      };

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

      return awsDeploy.createStack().then(() => {
        awsDeploy.serverless.service.environment.stages = {
          dev: {
            regions: {
              aws_useast1: {
                vars: {
                  iamRoleArnLambda: false,
                },
              },
            },
          },
        };

        expect(createStub.called).to.be.equal(false);
        awsDeploy.create.restore();
      });
    });

    it('should run promise chain in order', () => {
      awsDeploy.serverless.service.environment.stages = {
        dev: {
          regions: {
            aws_useast1: {
              vars: {},
            },
          },
        },
      };

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

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

        awsDeploy.create.restore();
        awsDeploy.monitorCreate.restore();
        awsDeploy.addOutputVars.restore();
      });
    });
  });
});