name: 'CI/CD Pipeline'

on:
  push:
    branches:
    - main
  pull_request:

concurrency: 'Beta - Production'

defaults:
  run:
    shell: bash

env:
  AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
  AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}

jobs:

  test:
    name: Test
    runs-on: ubuntu-latest

    services:
      postgres:
        image: postgres:13.3
        env:
          POSTGRES_PASSWORD: password
          POSTGRES_USER: postgres
          POSTGRES_DB: data_collector
        ports:
          - 5432:5432
        # needed because the postgres container does not provide a healthcheck
        # tmpfs makes DB faster by using RAM
        options: >-
          --mount type=tmpfs,destination=/var/lib/postgresql/data
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
    env:
      RAILS_ENV: test
      GEMFILE_RUBY_VERSION: 3.0.0
      DB_HOST: localhost
      DB_DATABASE: data_collector
      DB_USERNAME: postgres
      DB_PASSWORD: password

      # Rails verifies the time zone in DB is the same as the time zone of the Rails app
      TZ: "Europe/London"


    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Set up Ruby
        uses: ruby/setup-ruby@v1
        with:
          # runs 'bundle install' and caches installed gems automatically
          bundler-cache: true

      - name: Create DB
        run: |
          bundle exec rake db:prepare

      - name: Compile Assets
        run: |
          bundle exec rake assets:precompile

      - name: Run tests
        run: |
          bundle exec rake

  deploy:
    name: Deploy
    runs-on: ubuntu-latest
    environment: 'Beta - Production'
    needs:
      - test
    timeout-minutes: 30
    env:
      AWS_REGION: eu-west-2
      ECR_REPOSITORY: container-repository
      ECS_SERVICE: app
      ECS_CLUSTER: ecs-cluster
      CONTAINER_NAME: app  # set this to the name of the container in the containerDefinitions section of your task definition

    steps:
    - name: Checkout
      uses: actions/checkout@v2

    - name: Configure AWS credentials
      uses: aws-actions/configure-aws-credentials@v1
      with:
        aws-access-key-id: ${{ env.AWS_ACCESS_KEY_ID }}
        aws-secret-access-key: ${{ env.AWS_SECRET_ACCESS_KEY }}
        aws-region: ${{ env.AWS_REGION }}

    - name: Login to Amazon ECR
      id: login-ecr
      uses: aws-actions/amazon-ecr-login@v1

    - name: Build, tag, and push the image to Amazon ECR
      id: build-image
      env:
        ECR_REGISTRY: ${{ steps.login-ecr.outputs.registry }}
        ECR_REPOSITORY: ${{ env.ECR_REPOSITORY }}
        IMAGE_TAG: ${{ github.sha }}
      run: |
        # Build a docker container and push it to ECR
        docker build -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG .
        echo "Pushing image to ECR..."
        docker push $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG
        echo "::set-output name=image::$ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG"

    - name: Download task definition
      run: |
        aws ecs describe-task-definition --task-definition app --query taskDefinition > task-definition.json

    - name: Fill in the new image ID in the Amazon ECS task definition
      id: task-def
      uses: aws-actions/amazon-ecs-render-task-definition@v1
      with:
        task-definition: task-definition.json
        container-name: ${{ env.CONTAINER_NAME }}
        image: ${{ steps.build-image.outputs.image }}

    - name: Deploy Amazon ECS task definition
      uses: aws-actions/amazon-ecs-deploy-task-definition@v1
      with:
        task-definition: ${{ steps.task-def.outputs.task-definition }}
        service: ${{ env.ECS_SERVICE }}
        cluster: ${{ env.ECS_CLUSTER }}
        wait-for-service-stability: true