cd-pipeline.yml

name: Continuous Deployment Pipeline
# note:
# It's useful to recognize that this workflow is designed to be triggered by a merge to the default branch. 
# Therefore, ${{ github.sha }} will always be in reference to the SHA that originally triggered this workflow. 
# $GITHUB_SHA, on the other hand, is created whenever actions/checkout@v4 is run

# note:
# environment:
  # name:
# is keyword for using the environment protections.

# with: 
  # environment:
# is simply using a variable named environment 
  
on:
  push:
    branches:
      - main

jobs:
  prepare-deployment:
    runs-on: ${{ vars.RUNS_ON }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

  pr-label-summary:
    needs: prepare-deployment
    uses: ./.github/workflows/pr-label-semver.yml
    secrets: inherit

  approval-deploy-perf:
    needs: prepare-deployment
    environment: 
      name: perf-deploy
    runs-on: ${{ vars.RUNS_ON }}
    steps:
      - name: Pause for manual approval
        run: |
          echo "Deploying commit SHA ${{ github.sha }}, the latest merge to main"
          echo "Deployment paused for manual approval."

  pre-tag-summary:
    needs: approval-deploy-perf
    uses: ./.github/workflows/pre-tag-summary.yml
    secrets: inherit

  create-and-post-tag:
    needs: pre-tag-summary
    uses: ./.github/workflows/create-and-post-tag.yml
    secrets: inherit

  build-push-artifacts:
    needs: create-and-post-tag
    runs-on: ${{ vars.RUNS_ON }}
    steps:
      - name: Checkout Repo
        uses: actions/checkout@v4
        with:
          ref: ${{ needs.create-and-post-tag.outputs.newVersion }}
      - name: Build and Push Artifacts
        uses: ./.github/actions/build-push-artifacts
        with:
          ref: ${{ needs.create-and-post-tag.outputs.newVersion }}
          aws-access-key-id: ${{ secrets.VAEC_AWS_ACCESS_KEY_ID }}
          aws-secret-access-key: ${{ secrets.VAEC_AWS_SECRET_ACCESS_KEY }}
          role-to-assume: ${{ secrets.VAEC_DEPLOY_ROLE }}

  deploy-to-perf:
    needs: [create-and-post-tag, build-push-artifacts]
    uses: ./.github/workflows/deploy-release.yml
    secrets: inherit
    with:
      environment: perf
      ref: ${{ needs.create-and-post-tag.outputs.newVersion }}
      lambdaDeploy: true

  approval-deploy:
    needs: deploy-to-perf
    environment: 
      name: staging-deploy
    runs-on: ${{ vars.RUNS_ON }}
    steps:
      - name: Pause for manual approval
        run: echo "Deployment paused for manual approval to staging and production."

  create-release-notes:
    needs: [create-and-post-tag, approval-deploy]
    uses: ./.github/workflows/create-release-notes.yml
    secrets: inherit
    with:
      previousVersion: ${{ needs.create-and-post-tag.outputs.previousVersion }}

  deploy-to-staging:
    needs: [create-release-notes, create-and-post-tag]
    uses: ./.github/workflows/deploy-release.yml
    secrets: inherit
    with:
      environment: staging
      ref: ${{ needs.create-and-post-tag.outputs.newVersion }}
      lambdaDeploy: true

  publish-release-notes:
    needs: [create-release-notes, deploy-to-staging]
    uses: ./.github/workflows/publish-release-notes.yml
    secrets: inherit
    with:
      draftReleaseReference: ${{ needs.create-release-notes.outputs.draftReleaseReference }}

  deploy-to-prod:
    if: vars.CODE_FREEZE == 'false'
    needs: [publish-release-notes, create-and-post-tag]
    uses: ./.github/workflows/deploy-release.yml
    secrets: inherit
    with:
      environment: prod
      ref: ${{ needs.create-and-post-tag.outputs.newVersion }}
      lambdaDeploy: true

  send-slack-notifications:
    needs: [deploy-to-prod, create-and-post-tag]
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
    
      - name: Post to VA Slack
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.VA_NOTIFY_PUBLIC_SLACK_URL }}
          TAG: ${{ needs.create-and-post-tag.outputs.newVersion }}
        run: |
          curl -X POST -H 'Content-type: application/json' \
          --data "{
            \"text\": \":llama: Production Release Alert :llama:\n*Notification-API* \`${TAG}\` was released to production.\n:rocket: *<https://github.com/department-of-veterans-affairs/notification-api/releases/tag/${TAG}|Release notes are here>*\"
          }" \
          "$SLACK_WEBHOOK_URL"