'use strict';

const BbPromise = require('bluebird');
const { expect } = require('chai');
const log = require('log').get('serverless:test');
const fixtures = require('../fixtures/programmatic');

const { createBucket, createAndRemoveInBucket, deleteBucket } = require('../utils/s3');
const { deployService, removeService } = require('../utils/integration');
const { confirmCloudWatchLogs } = require('../utils/misc');

describe('AWS - S3 Integration Test', function () {
  this.timeout(1000 * 60 * 10); // Involves time-taking deploys
  let stackName;
  let serviceDir;
  let bucketMinimalSetup;
  let bucketExtendedSetup;
  let bucketCustomName;
  let bucketExistingSimpleSetup;
  let bucketExistingComplexSetup;
  const stage = 'dev';

  before(async () => {
    const serviceData = await fixtures.setup('s3');
    ({ servicePath: serviceDir } = serviceData);
    const serviceName = serviceData.serviceConfig.service;
    bucketMinimalSetup = `${serviceName}-s3-minimal`;
    bucketExtendedSetup = `${serviceName}-s3-extended`;
    bucketCustomName = `${serviceName}-custom-bucket-${stage}`;
    bucketExistingSimpleSetup = `${serviceName}-s3-existing-simple`;
    bucketExistingComplexSetup = `${serviceName}-s3-existing-complex`;
    stackName = `${serviceName}-${stage}`;
    // create external S3 buckets
    // NOTE: deployment can only be done once the S3 buckets are created
    log.notice('Creating S3 buckets...');
    return BbPromise.all([
      createBucket(bucketExistingSimpleSetup),
      createBucket(bucketExistingComplexSetup),
    ]).then(() => {
      return deployService(serviceDir);
    });
  });

  after(async () => {
    await removeService(serviceDir);
    return BbPromise.all([
      deleteBucket(bucketExistingSimpleSetup),
      deleteBucket(bucketExistingComplexSetup),
    ]);
  });

  describe('Minimal Setup', () => {
    it('should invoke function when an object is created', () => {
      const functionName = 'minimal';
      const expectedMessage = `Hello from S3! - (${functionName})`;

      return confirmCloudWatchLogs(`/aws/lambda/${stackName}-${functionName}`, () =>
        createAndRemoveInBucket(bucketMinimalSetup)
      ).then((events) => {
        const logs = events.reduce((data, event) => data + event.message, '');
        expect(/aws:s3/g.test(logs)).to.equal(true);
        expect(/ObjectCreated:Put/g.test(logs)).to.equal(true);
        expect(logs.includes(expectedMessage)).to.equal(true);
      });
    });
  });

  describe('Extended Setup', () => {
    it('should invoke function when an object is removed', () => {
      const functionName = 'extended';
      const expectedMessage = `Hello from S3! - (${functionName})`;

      return confirmCloudWatchLogs(`/aws/lambda/${stackName}-${functionName}`, () =>
        createAndRemoveInBucket(bucketExtendedSetup, { prefix: 'photos/', suffix: '.jpg' })
      ).then((events) => {
        const logs = events.reduce((data, event) => data + event.message, '');
        expect(/aws:s3/g.test(logs)).to.equal(true);
        expect(/ObjectRemoved:Delete/g.test(logs)).to.equal(true);
        expect(logs.includes(expectedMessage)).to.equal(true);
      });
    });
  });

  describe('Custom Setup', () => {
    it('should invoke function when an object is created', () => {
      const functionName = 'custom';
      const expectedMessage = `Hello from S3! - (${functionName})`;

      return confirmCloudWatchLogs(`/aws/lambda/${stackName}-${functionName}`, () =>
        createAndRemoveInBucket(bucketCustomName)
      ).then((events) => {
        const logs = events.reduce((data, event) => data + event.message, '');
        expect(/aws:s3/g.test(logs)).to.equal(true);
        expect(/ObjectCreated:Put/g.test(logs)).to.equal(true);
        expect(logs.includes(expectedMessage)).to.equal(true);
      });
    });
  });

  describe('Existing Setup', () => {
    describe('Single function / single bucket setup', () => {
      it('should invoke function when an object is created', () => {
        const functionName = 'existing';
        const expectedMessage = `Hello from S3! - (${functionName})`;

        return confirmCloudWatchLogs(`/aws/lambda/${stackName}-${functionName}`, () =>
          createAndRemoveInBucket(bucketExistingSimpleSetup, {
            prefix: 'Files/',
            suffix: '.TXT',
          })
        ).then((events) => {
          const logs = events.reduce((data, event) => data + event.message, '');
          expect(/aws:s3/g.test(logs)).to.equal(true);
          expect(/ObjectCreated:Put/g.test(logs)).to.equal(true);
          expect(logs.includes(expectedMessage)).to.equal(true);
        });
      });
    });

    describe('Multi function / multi bucket setup', () => {
      it('should invoke function when a .jpg object is created', () => {
        const functionName = 'existingCreated';
        const expectedMessage = `Hello from S3! - (${functionName})`;

        return confirmCloudWatchLogs(`/aws/lambda/${stackName}-${functionName}`, () =>
          createAndRemoveInBucket(bucketExistingComplexSetup, {
            prefix: 'photos',
            suffix: '.jpg',
          })
        ).then((events) => {
          const logs = events.reduce((data, event) => data + event.message, '');
          expect(/aws:s3/g.test(logs)).to.equal(true);
          expect(/ObjectCreated:Put/g.test(logs)).to.equal(true);
          expect(logs.includes(expectedMessage)).to.equal(true);
        });
      });
      it('should invoke function when a .jpg object is removed', () => {
        const functionName = 'existingRemoved';
        const expectedMessage = `Hello from S3! - (${functionName})`;

        return confirmCloudWatchLogs(`/aws/lambda/${stackName}-${functionName}`, () =>
          createAndRemoveInBucket(bucketExistingComplexSetup, {
            prefix: 'photos',
            suffix: '.jpg',
          })
        ).then((events) => {
          const logs = events.reduce((data, event) => data + event.message, '');
          expect(/aws:s3/g.test(logs)).to.equal(true);
          expect(/ObjectRemoved:Delete/g.test(logs)).to.equal(true);
          expect(logs.includes(expectedMessage)).to.equal(true);
        });
      });
      it('should invoke function when a .png object is created', () => {
        const functionName = 'existingCreated';
        const expectedMessage = `Hello from S3! - (${functionName})`;

        return confirmCloudWatchLogs(`/aws/lambda/${stackName}-${functionName}`, () =>
          createAndRemoveInBucket(bucketExistingComplexSetup, {
            prefix: 'photos',
            suffix: '.png',
          })
        ).then((events) => {
          const logs = events.reduce((data, event) => data + event.message, '');
          expect(/aws:s3/g.test(logs)).to.equal(true);
          expect(/ObjectCreated:Put/g.test(logs)).to.equal(true);
          expect(logs.includes(expectedMessage)).to.equal(true);
        });
      });
      it('should invoke function when a .png object is removed', () => {
        const functionName = 'existingRemoved';
        const expectedMessage = `Hello from S3! - (${functionName})`;

        return confirmCloudWatchLogs(`/aws/lambda/${stackName}-${functionName}`, () =>
          createAndRemoveInBucket(bucketExistingComplexSetup, {
            prefix: 'photos',
            suffix: '.png',
          })
        ).then((events) => {
          const logs = events.reduce((data, event) => data + event.message, '');
          expect(/aws:s3/g.test(logs)).to.equal(true);
          expect(/ObjectRemoved:Delete/g.test(logs)).to.equal(true);
          expect(logs.includes(expectedMessage)).to.equal(true);
        });
      });
    });
  });
});