name: Release (GitOps)

on:
  workflow_dispatch:
    inputs:
      action:
        description: "Action to perform"
        required: true
        type: choice
        options:
          - deploy-bad-release
          - rollback
      failure_rate:
        description: "Failure rate (0.0-1.0), only used for deploy-bad-release"
        required: false
        default: "0.7"
  repository_dispatch:
    types: [auto-remediate-release]

env:
  DT_ENV_URL: ${{ secrets.DT_ENV_URL }}
  DT_API_TOKEN: ${{ secrets.DT_API_TOKEN }}

jobs:
  release:
    runs-on: ubuntu-latest

    steps:
      - name: Resolve action
        id: resolve
        run: |
          if [ "${{ github.event_name }}" = "repository_dispatch" ]; then
            echo "action=rollback" >> "$GITHUB_OUTPUT"
            echo "failure_rate=0" >> "$GITHUB_OUTPUT"
          else
            echo "action=${{ inputs.action }}" >> "$GITHUB_OUTPUT"
            echo "failure_rate=${{ inputs.failure_rate }}" >> "$GITHUB_OUTPUT"
          fi

      - name: Resolve version
        id: version
        run: |
          if [ "${{ steps.resolve.outputs.action }}" = "deploy-bad-release" ]; then
            echo "version=bad-release-${{ github.run_number }}" >> "$GITHUB_OUTPUT"
          else
            echo "version=rollback-${{ github.run_number }}" >> "$GITHUB_OUTPUT"
          fi

      - name: Checkout code
        uses: actions/checkout@v4

      - name: Install yq
        uses: mikefarah/yq@master

      - name: Update payment-service manifest
        run: |
          VERSION="${{ steps.version.outputs.version }}"
          FAILURE_RATE="${{ steps.resolve.outputs.failure_rate }}"

          # Update pod template labels
          yq -i '
            .spec.template.metadata.labels."app.kubernetes.io/version" = "'"$VERSION"'"
          ' k8s/payment-service.yaml

          # Update DT_RELEASE_VERSION env var
          yq -i '
            (.spec.template.spec.containers[0].env[] | select(.name == "DT_RELEASE_VERSION")).value = "'"$VERSION"'"
          ' k8s/payment-service.yaml

          # Update FAILURE_RATE env var
          yq -i '
            (.spec.template.spec.containers[0].env[] | select(.name == "FAILURE_RATE")).value = "'"$FAILURE_RATE"'"
          ' k8s/payment-service.yaml

      - name: Commit and push
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add k8s/payment-service.yaml
          git commit -m "release: payment-service ${{ steps.version.outputs.version }} (failure_rate=${{ steps.resolve.outputs.failure_rate }})"
          git push

      - name: Send Dynatrace deployment event
        if: always()
        env:
          K8_CLUSTER: ${{ secrets.K8_CLUSTER }}
        run: |
          curl -X POST \
            -H "Authorization: Api-Token ${{ env.DT_API_TOKEN }}" \
            -H "Content-Type: application/json" \
            "${{ env.DT_ENV_URL }}/api/v2/events/ingest" \
            -d @- <<EOF
          {
            "eventType": "CUSTOM_DEPLOYMENT",
            "title": "Payment Service ${{ steps.resolve.outputs.action }}",
            "description": "Version: ${{ steps.version.outputs.version }}, Failure Rate: ${{ steps.resolve.outputs.failure_rate }}",
            "entitySelector": "type(\"SERVICE\"),entityName.startsWith(\"payment-service\"),tag(\"environment:${K8_CLUSTER}\")",
            "properties": {
              "dt.release.version": "${{ steps.version.outputs.version }}",
              "dt.release.product": "workshop",
              "dt.release.stage": "production",
              "git.repository": "${{ github.repository }}",
              "git.commit": "${{ github.sha }}",
              "deployment.url": "${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}",
              "environment": "${K8_CLUSTER}"
            }
          }
          EOF