name: Release Helm Chart to GitHub Pages
run-name: Release Helm Chart ${{ inputs.chart_version }}

# Triggered automatically when publish-docker.yml completes, or manually
# We wait for Docker publish because the smoke test pulls the Docker image
on:
  workflow_run:
    workflows: ["Publish Docker Images"]
    types: [completed]
  workflow_dispatch:
    inputs:
      chart_version:
        description: "Chart version (e.g., 4.28.0)"
        required: true

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-24.04
    # Only run if workflow_dispatch OR if workflow_run completed successfully
    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
    steps:
      - name: Determine chart version
        id: version
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            VERSION="${{ inputs.chart_version }}"
          else
            RUN_ID="${{ github.event.workflow_run.id }}"
            echo "Extracting version from workflow run ${RUN_ID}..."

            WORKFLOW_DATA=$(gh api repos/${{ github.repository }}/actions/runs/${RUN_ID})
            TAG=$(echo "$WORKFLOW_DATA" | jq -r '.display_title' | grep -oP 'v?\d+\.\d+\.\d+(-[a-zA-Z]+\.\d+)?' || echo "")

            if [ -z "$TAG" ]; then
              echo "::error::Could not extract version from workflow_run"
              exit 1
            fi

            VERSION="${TAG#v}"
          fi

          if [ -z "$VERSION" ]; then
            echo "::error::chart_version input is required"
            exit 1
          fi

          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
          echo "release_tag=v${VERSION}" >> "$GITHUB_OUTPUT"
          echo "Chart version: $VERSION"

      - name: Checkout
        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
        with:
          fetch-depth: 0
          fetch-tags: true

      - name: Validate release line policy
        id: release_line
        env:
          RELEASE_TAG: ${{ steps.version.outputs.release_tag }}
        run: |
          set -euo pipefail
          python3 scripts/release_control/validate_artifact_release_line.py \
            --tag "${RELEASE_TAG}" \
            --purpose "Helm pages release" \
            --github-output "$GITHUB_OUTPUT"

      - name: Check out governed release branch
        env:
          REQUIRED_BRANCH: ${{ steps.release_line.outputs.required_branch }}
        run: |
          set -euo pipefail
          git checkout -B "$REQUIRED_BRANCH" "origin/$REQUIRED_BRANCH"

      - name: Configure Git
        run: |
          git config user.name "$GITHUB_ACTOR"
          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"

      - name: Install Helm
        uses: azure/setup-helm@dda3372f752e03dde6b3237bc9431cdc2f7a02a2 # v5.0.0
        with:
          version: v3.15.2

      - name: Install helm-docs
        run: |
          cd /tmp
          HELM_DOCS_VERSION="1.14.2"
          HELM_DOCS_ARCHIVE="helm-docs_${HELM_DOCS_VERSION}_Linux_x86_64.tar.gz"
          HELM_DOCS_SHA256="a8cf72ada34fad93285ba2a452b38bdc5bd52cc9a571236244ec31022928d6cc"
          wget "https://github.com/norwoodj/helm-docs/releases/download/v${HELM_DOCS_VERSION}/${HELM_DOCS_ARCHIVE}"
          printf '%s  %s\n' "$HELM_DOCS_SHA256" "$HELM_DOCS_ARCHIVE" | sha256sum --check --
          tar -xzf "$HELM_DOCS_ARCHIVE"
          sudo mv helm-docs /usr/local/bin/
          helm-docs --version

      - name: Generate chart documentation
        env:
          REQUIRED_BRANCH: ${{ steps.release_line.outputs.required_branch }}
        run: |
          set -euo pipefail
          cd deploy/helm/pulse
          helm-docs

          # Commit if README changed
          if ! git diff --quiet README.md; then
            git config user.name "$GITHUB_ACTOR"
            git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
            git add README.md
            git commit -m "Auto-update Helm chart documentation"
            git pull --rebase origin "$REQUIRED_BRANCH"
            git push origin HEAD:"$REQUIRED_BRANCH"
          fi
          cd ../../..

      - name: Update Chart.yaml version
        env:
          REQUIRED_BRANCH: ${{ steps.release_line.outputs.required_branch }}
        run: |
          set -euo pipefail
          VERSION="${{ steps.version.outputs.version }}"
          python3 scripts/sync_chart_release_metadata.py \
            --chart deploy/helm/pulse/Chart.yaml \
            --version "$VERSION" \
            --repo "${{ github.repository }}"

          # Commit if Chart.yaml changed
          if ! git diff --quiet deploy/helm/pulse/Chart.yaml; then
            git config user.name "$GITHUB_ACTOR"
            git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
            git add deploy/helm/pulse/Chart.yaml
            git commit -m "Auto-update Helm chart version to $VERSION"
            git pull --rebase origin "$REQUIRED_BRANCH"
            git push origin HEAD:"$REQUIRED_BRANCH"
          fi

      - name: Validate Helm chart
        run: |
          # Strict linting
          helm lint deploy/helm/pulse --strict

          # Template validation with minimal values
          helm template pulse deploy/helm/pulse --set persistence.enabled=false > /dev/null

          # Template validation with common overrides
          helm template pulse deploy/helm/pulse \
            --set ingress.enabled=true \
            --set ingress.hosts[0].host=pulse.example.com \
            --set agent.enabled=true > /dev/null

          echo "✓ Chart validation passed"

      - name: Smoke test with kind
        run: |
          set -euo pipefail

          cleanup() {
            kind delete cluster --name pulse-test >/dev/null 2>&1 || true
          }

          diagnose() {
            echo "::group::helm status"
            helm status pulse || true
            echo "::endgroup::"

            echo "::group::kubectl get all"
            kubectl get all -A || true
            echo "::endgroup::"

            echo "::group::kubectl describe pods"
            kubectl describe pods -A || true
            echo "::endgroup::"

            echo "::group::pod logs"
            pods=$(kubectl get pods -A -o name 2>/dev/null || true)
            for pod in $pods; do
              echo "### ${pod}"
              kubectl logs --all-containers=true --tail=200 "$pod" || true
            done
            echo "::endgroup::"

            echo "::group::events"
            kubectl get events -A --sort-by=.lastTimestamp || kubectl get events -A || true
            echo "::endgroup::"

            cleanup
          }

          trap 'diagnose' ERR

          # Install kind
          curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.20.0/kind-linux-amd64
          chmod +x ./kind
          sudo mv ./kind /usr/local/bin/kind

          # Create cluster
          kind create cluster --name pulse-test --wait 5m

          # Install chart
          helm install pulse deploy/helm/pulse \
            --set persistence.enabled=false \
            --set server.secretEnv.create=true \
            --set server.secretEnv.data.API_TOKENS=test-token \
            --wait --timeout 5m --debug

          # Verify deployment
          kubectl wait --for=condition=ready pod -l app.kubernetes.io/name=pulse --timeout=180s || (kubectl describe pods -l app.kubernetes.io/name=pulse && exit 1)
          kubectl get pods -l app.kubernetes.io/name=pulse

          # Test upgrade
          helm upgrade pulse deploy/helm/pulse \
            --set persistence.enabled=false \
            --set server.secretEnv.create=true \
            --set server.secretEnv.data.API_TOKENS=test-token \
            --wait --timeout 5m --debug

          # Cleanup
          trap - ERR
          cleanup

          echo "✓ Smoke test passed"

      - name: Run chart-releaser
        uses: helm/chart-releaser-action@a917fd15b20e8b64b94d9158ad54cd6345335584 # v1.6.0
        with:
          charts_dir: deploy/helm
          config: cr.yaml
          skip_existing: true
        env:
          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
          CR_RELEASE_NAME_TEMPLATE: "helm-chart-{{ .Version }}"
          CR_MAKE_RELEASE_LATEST: false

      - name: Ensure chart release and pages index
        env:
          GITHUB_TOKEN: ${{ github.token }}
          VERSION: ${{ steps.version.outputs.version }}
          REPOSITORY: ${{ github.repository }}
          RELEASE_TAG: ${{ steps.version.outputs.release_tag }}
        run: |
          set -euo pipefail

          CHART="pulse-${VERSION}.tgz"
          CHART_PATH="dist/${CHART}"
          CHART_RELEASE="helm-chart-${VERSION}"
          CHART_RELEASE_URL="https://github.com/${REPOSITORY}/releases/download/${CHART_RELEASE}"
          RELEASE_SHA="$(git rev-list -n 1 "${RELEASE_TAG}")"

          mkdir -p dist
          helm package deploy/helm/pulse \
            --version "${VERSION}" \
            --app-version "${VERSION}" \
            --destination dist

          if gh release view "${CHART_RELEASE}" >/dev/null 2>&1; then
            gh release upload "${CHART_RELEASE}" "${CHART_PATH}" --clobber
          else
            gh release create "${CHART_RELEASE}" "${CHART_PATH}" \
              --target "${RELEASE_SHA}" \
              --title "Helm chart ${VERSION}" \
              --notes "Helm chart for Pulse ${VERSION}." \
              --prerelease \
              --latest=false
          fi
          gh release edit "${CHART_RELEASE}" --prerelease --latest=false

          workdir="$(mktemp -d)"
          cleanup() {
            git worktree remove -f "${workdir}/gh-pages" >/dev/null 2>&1 || true
            rm -rf "${workdir}"
          }
          trap cleanup EXIT

          git fetch origin gh-pages
          git worktree add "${workdir}/gh-pages" origin/gh-pages
          git -C "${workdir}/gh-pages" checkout -B gh-pages origin/gh-pages

          index_work="${workdir}/index"
          mkdir -p "${index_work}"
          cp "${CHART_PATH}" "${index_work}/${CHART}"
          if [ -f "${workdir}/gh-pages/index.yaml" ]; then
            cp "${workdir}/gh-pages/index.yaml" "${index_work}/index.yaml"
            helm repo index "${index_work}" \
              --url "${CHART_RELEASE_URL}" \
              --merge "${index_work}/index.yaml"
          else
            helm repo index "${index_work}" --url "${CHART_RELEASE_URL}"
          fi
          cp "${index_work}/index.yaml" "${workdir}/gh-pages/index.yaml"

          if ! grep -q "version: ${VERSION}" "${workdir}/gh-pages/index.yaml"; then
            echo "::error::Helm pages index is missing version ${VERSION}"
            exit 1
          fi

          git -C "${workdir}/gh-pages" add index.yaml
          if git -C "${workdir}/gh-pages" diff --cached --quiet; then
            echo "Helm pages index already contains ${VERSION}"
          else
            git -C "${workdir}/gh-pages" commit -m "Update Helm chart index for ${VERSION}"
            git -C "${workdir}/gh-pages" push origin HEAD:gh-pages
          fi

      - name: Mark Helm chart release as pre-release (avoid latest override)
        env:
          GITHUB_TOKEN: ${{ github.token }}
        run: |
          TAG="helm-chart-${{ steps.version.outputs.version }}"
          gh release edit "$TAG" --prerelease --latest=false || echo "No helm chart release to edit for $TAG"