'use strict'

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

const { confirmCloudWatchLogs } = require('../../utils/misc')
const {
  createSnsTopic,
  removeSnsTopic,
  publishSnsMessage,
} = require('../../utils/sns')
const { deployService, removeService } = require('../../utils/integration')

describe('AWS - SNS Integration Test', function () {
  this.timeout(1000 * 60 * 100) // Involves time-taking deploys
  let stackName
  let serviceDir
  let minimalTopicName
  let filteredTopicName
  let existingTopicName
  const stage = 'dev'

  before(async () => {
    const serviceData = await fixtures.setup('sns')
    ;({ servicePath: serviceDir } = serviceData)
    const serviceName = serviceData.serviceConfig.service

    minimalTopicName = `${serviceName}-minimal`
    filteredTopicName = `${serviceName}-filtered`
    existingTopicName = `${serviceName}-existing`

    stackName = `${serviceName}-${stage}`
    // create "existing" SNS topics
    // NOTE: deployment can only be done once the SNS topics are created
    log.notice(`Creating SNS topic "${existingTopicName}"...`)
    await createSnsTopic(existingTopicName)
    return deployService(serviceDir)
  })

  after(async () => {
    await removeService(serviceDir)
    log.notice('Deleting SNS topics')
    return removeSnsTopic(existingTopicName)
  })

  describe('Minimal Setup', () => {
    it('should invoke on a topic message', async () => {
      const functionName = 'snsMinimal'
      const message = 'Hello from SNS!'

      const events = await confirmCloudWatchLogs(
        `/aws/lambda/${stackName}-${functionName}`,
        () => publishSnsMessage(minimalTopicName, message),
        {
          checkIsComplete: (soFarEvents) => {
            const logs = soFarEvents.reduce(
              (data, event) => data + event.message,
              '',
            )
            return logs.includes(message)
          },
        },
      )
      const logs = events.reduce((data, event) => data + event.message, '')
      expect(logs).to.include(functionName)
      expect(logs).to.include(message)
    })
  })

  describe('Multiple and Filtered Setup', async () => {
    it('should invoke on a topic message that matches filter', async () => {
      const leftFunctionName = 'snsMultipleFilteredLeft'
      const rightFunctionName = 'snsMultipleFilteredRight'
      const leftMessage = 'Hello to the left-side from SNS!'
      const rightMessage = 'Hello to the right-side from SNS!'
      const middleMessage = 'Hello to the middle-side from SNS!'
      const leftAttributes = {
        side: { DataType: 'String', StringValue: 'left' },
      }
      const middleAttributes = {
        side: { DataType: 'String', StringValue: 'middle' },
      }
      const rightAttributes = {
        side: { DataType: 'String', StringValue: 'right' },
      }

      return Promise.all([
        confirmCloudWatchLogs(
          `/aws/lambda/${stackName}-${leftFunctionName}`,
          async () => {
            await publishSnsMessage(
              filteredTopicName,
              middleMessage,
              middleAttributes,
            )
            await publishSnsMessage(
              filteredTopicName,
              leftMessage,
              leftAttributes,
            )
          },
          {
            checkIsComplete: (events) =>
              events
                .reduce((data, event) => data + event.message, '')
                .includes(leftMessage),
          },
        ).then((events) => {
          const logs = events.reduce((data, event) => data + event.message, '')
          expect(logs).to.include(leftFunctionName)
          expect(logs).to.include(leftMessage)
          expect(logs).not.to.include(middleMessage)
          expect(logs).not.to.include(rightMessage)
        }),
        confirmCloudWatchLogs(
          `/aws/lambda/${stackName}-${rightFunctionName}`,
          async () => {
            await publishSnsMessage(
              filteredTopicName,
              middleMessage,
              middleAttributes,
            )
            await publishSnsMessage(
              filteredTopicName,
              rightMessage,
              rightAttributes,
            )
          },
          {
            checkIsComplete: (events) =>
              events
                .reduce((data, event) => data + event.message, '')
                .includes(rightMessage),
          },
        ).then((events) => {
          const logs = events.reduce((data, event) => data + event.message, '')
          expect(logs).to.include(rightFunctionName)
          expect(logs).not.to.include(leftMessage)
          expect(logs).not.to.include(middleMessage)
          expect(logs).to.include(rightMessage)
        }),
      ])
    })
  })

  describe('Existing Setup', () => {
    it('should invoke on an existing topic message', async () => {
      const functionName = 'snsExisting'
      const message = 'Hello from an existing SNS!'

      const events = await confirmCloudWatchLogs(
        `/aws/lambda/${stackName}-${functionName}`,
        () => publishSnsMessage(existingTopicName, message),
        {
          checkIsComplete: (soFarEvents) =>
            soFarEvents
              .reduce((data, event) => data + event.message, '')
              .includes(message),
        },
      )
      const logs = events.reduce((data, event) => data + event.message, '')
      expect(logs).to.include(functionName)
      expect(logs).to.include(message)
    })
  })
})