name: Push to AWS ECR and deploy
  on:
    workflow_dispatch:

  jobs:
    Build:
      name: Build
      runs-on: ubuntu-latest
      defaults:
        run:
          working-directory: ./Backend
      steps:
        - name: Checkout
          uses: actions/checkout@v2

        - name: Configure AWS credentials
          uses: aws-actions/configure-aws-credentials@v1
          with:
            aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
            aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
            aws-region: ap-south-1

        - 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: supercharge
            IMAGE_TAG: latest
          run: |
            docker build -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG .
            docker push $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG

        # https://blog.benoitblanchon.fr/github-action-run-ssh-commands/
        - name: Configure SSH
          env:
            SSH_USER: ubuntu
            SSH_KEY: ${{ secrets.EC_PRIVATE_KEY }}
            SSH_HOST: ${{ vars.HOST_IP }}
          run: |
            mkdir -p ~/.ssh/
            echo "$SSH_KEY" > ~/.ssh/deploy.key
            chmod 600 ~/.ssh/deploy.key
            cat >>~/.ssh/config <<END
            Host deploy
              HostName $SSH_HOST
              User $SSH_USER
              IdentityFile ~/.ssh/deploy.key
              StrictHostKeyChecking no
            END

        - name: copying the dockercompose file
          run: cat dockercompose.yml | ssh deploy 'cat > ~/supercharge/dockercompose.yml'

          # This is important because the authorization token expires after 12 hours
        - name: Authorizing ECR
          env:
            ECR_URI: ${{ vars.ECR_URI }}
          run: ssh deploy 'aws ecr get-login-password --region ap-south-1 | docker login --username AWS --password-stdin <aws-id>.dkr.ecr.ap-south-1.amazonaws.com'


        - name: Fetching changes
          run: ssh deploy 'cd ~/supercharge/ && docker-compose -f dockercompose.yml pull && docker-compose -f dockercompose.yml up -d'

        - name: Deleting Obsolete Images
          run: ssh deploy 'docker image prune -f'