on:
  pull_request:
    types:
      - closed

jobs:
  clean-up:
    runs-on: ubuntu-latest
    steps:
      - name: inject slug/short variables
        uses: rlespinasse/github-slug-action@v3.x

      - name: set STAGE variable in environment for next steps
        run: echo "STAGE=pr-${{ github.event.number }}-${{ env.GITHUB_HEAD_REF_SLUG }}" >> $GITHUB_ENV

      - name: checkout the files
        uses: actions/checkout@v2

      - uses: actions/setup-node@v3
        with:
          node-version: 14

      # there is a bug with the actions/cache used in bahmutov/npm-install@v1 on "closed" event
      # more infos here : https://github.com/actions/cache/issues/478
      - name: install node dependencies
        run: yarn --frozen-lockfile
        working-directory: .cdk

      - 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: us-east-1

      - name: destroy the stack on AWS
        run: yarn destroy
        working-directory: .cdk

      - name: delete the github deployments and the corresponding environment
        uses: strumwolf/delete-deployment-environment@v1.1.0
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          environment: ${{ env.STAGE }}