name: CI/CD Pipeline

on:
  push:
    branches: [main, develop]
  pull_request:
    branches: [main]

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  # Lint and Test
  quality:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.21'

      - name: Run linter
        uses: golangci/golangci-lint-action@v4
        with:
          version: latest

      - name: Run tests
        run: go test -v -race ./...

  # Build and Push Docker Image
  build:
    needs: quality
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=sha,prefix=
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Build and push
        uses: docker/build-push-action@v5
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  # Deploy to Staging
  deploy-staging:
    needs: build
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/develop'
    environment: staging

    steps:
      - uses: actions/checkout@v4

      - name: Set up kubectl
        uses: azure/setup-kubectl@v4

      - name: Configure kubectl
        uses: azure/k8s-set-context@v3
        with:
          kubeconfig: ${{ secrets.KUBE_CONFIG_STAGING }}

      - name: Deploy to staging
        run: |
          kubectl set image deployment/myapp \
            app=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }} \
            -n staging
          kubectl rollout status deployment/myapp -n staging

      - name: Run smoke tests
        run: |
          sleep 10
          curl -f https://staging.myapp.com/health || exit 1

  # Deploy to Production
  deploy-production:
    needs: build
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main'
    environment: production

    steps:
      - uses: actions/checkout@v4

      - name: Set up kubectl
        uses: azure/setup-kubectl@v4

      - name: Configure kubectl
        uses: azure/k8s-set-context@v3
        with:
          kubeconfig: ${{ secrets.KUBE_CONFIG_PRODUCTION }}

      - name: Deploy to production
        run: |
          kubectl set image deployment/myapp \
            app=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }} \
            -n production
          kubectl rollout status deployment/myapp -n production

      - name: Notify success
        if: success()
        uses: slackapi/slack-github-action@v1
        with:
          payload: |
            {
              "text": "✅ Successfully deployed ${{ github.sha }} to production"
            }
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
          SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK

      - name: Notify failure
        if: failure()
        uses: slackapi/slack-github-action@v1
        with:
          payload: |
            {
              "text": "❌ Deployment failed for ${{ github.sha }}"
            }
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
          SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK

# Helm Deployment (alternative)
  deploy-helm:
    needs: build
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main'
    environment: production

    steps:
      - uses: actions/checkout@v4

      - name: Set up Helm
        uses: azure/setup-helm@v3
        with:
          version: v3.13.0

      - name: Configure kubectl
        uses: azure/k8s-set-context@v3
        with:
          kubeconfig: ${{ secrets.KUBE_CONFIG_PRODUCTION }}

      - name: Deploy with Helm
        run: |
          helm upgrade --install myapp ./charts/myapp \
            --namespace production \
            --set image.repository=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }} \
            --set image.tag=${{ github.sha }} \
            --wait --atomic