name: lint-test-helm

on:
  pull_request:
    branches:
      - main
    paths:
      - 'clusters/cl01tl/helm/**'

  push:
    branches:
      - main
    paths:
      - 'clusters/cl01tl/helm/**'

env:
  CLUSTER: cl01tl
  BASE_BRANCH: "origin/${{ github.base_ref }}"
  KUBECONFORM_VERSION: "v0.6.7"
  ARGOCD_VERSION: "v3.3.6"

jobs:
  lint-helm:
    runs-on: ubuntu-js
    outputs:
      chart-dir: ${{ steps.check-dir-changes.outputs.chart-dir }}
      chart-dir-csv: ${{ steps.check-dir-changes.outputs.chart-dir-csv }}
      changes-detected: ${{ steps.check-dir-changes.outputs.changes-detected }}
    steps:
      - name: Checkout
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          fetch-depth: 0

      - name: Check Branch Exists
        id: check-branch-exists
        if: github.event_name == 'pull_request'
        uses: GuillaumeFalourd/branch-exists@650358876c774d6ccbd581b5553eb636dab79a97 # v1.2
        with:
          branch: ${{ github.base_ref }}

      - name: Report Branch Exists
        id: branch-exists
        if: github.event_name == 'push' || steps.check-branch-exists.outputs.exists == 'true' && github.event_name == 'pull_request'
        run: |
          if [ "${{ github.event_name }}" == "push" ]; then
            echo ">> Action is from a push event, will continue with linting"

          else
            echo ">> Branch ${{ github.base_ref }} exists, will continue with linting"

          fi

          echo ""
          echo "----"

          echo "exists=true" >> $GITHUB_OUTPUT

      - name: Set Up Helm
        if: steps.branch-exists.outputs.exists == 'true'
        uses: azure/setup-helm@dda3372f752e03dde6b3237bc9431cdc2f7a02a2 # v5
        with:
          token: ${{ secrets.GITEA_TOKEN }}
          # renovate: datasource=github-releases depName=helm/helm
          version: v4.1.3
          cache: true

      - name: Cache Helm Dependencies
        if: steps.branch-exists.outputs.exists == 'true'
        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5
        with:
          path: |
            ~/.cache/helm
            ~/.config/helm
          key: helm-cache-${{ runner.os }}-${{ hashFiles('infrastructure/clusters/cl01tl/helm/**/Chart.yaml', 'infrastructure/clusters/cl01tl/helm/**/Chart.lock') }}
          restore-keys: |
            helm-cache-${{ runner.os }}-

      - name: Check Directories for Changes
        id: check-dir-changes
        if: steps.branch-exists.outputs.exists == 'true'
        run: |
          echo ">> Target branch for diff is: ${BASE_BRANCH}"

          if [ "${{ github.event_name }}" == "pull_request" ]; then
            DIFF_TARGET="${BASE_BRANCH}"
            echo ""
            echo ">> Checking for changes in a pull request ..."

          else
            DIFF_TARGET="${{ github.event.before }}..HEAD"
            echo ""
            echo ">> Checking for changes from a push ..."

          fi

          CHANGED_CHARTS=$(git diff --name-only "${DIFF_TARGET}" | grep -E "^clusters/${CLUSTER}/helm/" | awk -F '/' '{print $4}' | sort -u || true)

          if [ -n "${CHANGED_CHARTS}" ]; then
            echo ""
            echo ">> Chart to Lint:"
            echo ""
            echo "${CHANGED_CHARTS}"

            CHANGED_CHARTS_CSV=$(echo "${CHANGED_CHARTS}" | paste -sd ',' -)

            echo ""
            echo "----"

            echo "changes-detected=true" >> $GITHUB_OUTPUT
            echo "chart-dir-csv=${CHANGED_CHARTS_CSV}" >> $GITHUB_OUTPUT
            echo "chart-dir<<EOF" >> $GITHUB_OUTPUT
            echo "${CHANGED_CHARTS}" >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT

          else
            echo ""
            echo ">> Did not find any helm charts files to lint"

            echo ""
            echo "----"

            echo "changes-detected=false" >> $GITHUB_OUTPUT

          fi

      - name: Add Repositories
        if: steps.check-dir-changes.outputs.changes-detected == 'true'
        env:
          CHANGED_CHARTS: ${{ steps.check-dir-changes.outputs.chart-dir }}
        run: |
          echo ">> Adding repositories for chart dependencies ..."
          echo ""

          for DIR in ${CHANGED_CHARTS}; do
            helm dependency list --max-col-width 120 clusters/${CLUSTER}/helm/${DIR} 2> /dev/null \
              | tail -n +2 \
              | awk 'NF > 0 { print $1, $3 }' \
              | while read -r REPO_NAME REPO_URL; do
                if [[ "${REPO_URL}" == oci://* ]]; then
                  echo ">> Ignoring OCI repo: ${REPO_URL}"

                elif [[ -n "${REPO_NAME}" && -n "${REPO_URL}" ]]; then
                  helm repo add "${REPO_NAME}" "${REPO_URL}"

                fi

              done || true
          done

          if helm repo list > /dev/null 2>&1; then
            echo ""
            echo ">> Update repository cache ..."
            helm repo update

          fi

          echo ""
          echo "----"

      - name: Lint Helm Chart
        id: lint
        if: steps.check-dir-changes.outputs.changes-detected == 'true'
        env:
          CHANGED_CHARTS: ${{ steps.check-dir-changes.outputs.chart-dir }}
        run: |
          EXIT_CODE=0
          FAILED_CHARTS=""

          echo ">> Running linting on changed charts ..."

          for DIR in ${CHANGED_CHARTS}; do
            CHART_PATH="clusters/${CLUSTER}/helm/${DIR}"
            CHART_NAME=$(basename "${CHART_PATH}")

            if [ -f "${CHART_PATH}/Chart.yaml" ]; then
              echo ""
              echo ">> Building helm dependency for ${CHART_NAME} ..."
              helm dependency build "${CHART_PATH}" --skip-refresh

              echo ""
              echo ">> Linting helm chart ${CHART_NAME} ..."

              if ! helm lint "${CHART_PATH}" --namespace "default"; then
                EXIT_CODE=1

                if [ -z "${FAILED_CHARTS}" ]; then
                  FAILED_CHARTS="${DIR}"

                else
                  FAILED_CHARTS="${FAILED_CHARTS}, ${DIR}"

                fi
              fi

            else
              echo ""
              echo ">> Directory ${CHART_PATH} does not contain a Chart.yaml. Skipping ..."

            fi

          done

          echo ""
          echo "----"

          echo "failed-charts=${FAILED_CHARTS}" >> "$GITHUB_OUTPUT"

          exit $EXIT_CODE

      - name: ntfy Failed
        uses: niniyas/ntfy-action@96acac57fdc91d4c4f50b78486c1ed6f03f9f61c # master
        if: failure()
        with:
          url: '${{ secrets.NTFY_URL }}'
          topic: '${{ secrets.NTFY_TOPIC }}'
          title: 'Helm Test Failure'
          priority: 3
          headers: '{"Authorization": "Bearer ${{ secrets.NTFY_CRED }}"}'
          tags: action,failed
          details: "Helm linting for cluster '${{ env.CLUSTER }}' failed on charts: ${{ steps.lint.outputs.failed-charts }}"
          icon: 'https://cdn.jsdelivr.net/gh/selfhst/icons/png/gitea.png'
          actions: '[{"action": "view", "label": "View Run", "url": "${{ vars.USER_URL }}/${{ github.repository }}/actions/runs/${{ github.run_id }}", "clear": true}]'
          image: true

  validate-kubeconform:
    needs: lint-helm
    runs-on: ubuntu-js
    if: |
      needs.lint-helm.result == 'success' &&
      needs.lint-helm.outputs.changes-detected == 'true' &&
      github.event_name == 'pull_request'
    steps:
      - name: Checkout
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          fetch-depth: 0

      - name: Cache Kubeconform
        id: cache-kubeconform
        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5
        with:
          path: /usr/local/bin/kubeconform
          key: ${{ runner.os }}-kubeconform-${{ env.KUBECONFORM_VERSION }}

      - name: Install Kubeconform
        if: steps.cache-kubeconform.outputs.cache-hit != 'true'
        run: |
          echo ">> Downloading Kubeconform ${{ env.KUBECONFORM_VERSION }} ..."
          wget -q https://github.com/yannh/kubeconform/releases/download/${{ env.KUBECONFORM_VERSION }}/kubeconform-linux-amd64.tar.gz

          echo ""
          echo ">> Extracting Kubeconform ..."
          tar xf kubeconform-linux-amd64.tar.gz

          echo ""
          echo ">> Installing Kubeconform ..."
          sudo mv kubeconform /usr/local/bin/

      - name: Verify installation
        run: |
          echo ""
          echo ">> Verifying installation ..."
          kubeconform -v

          echo ""
          echo "----"

      - name: Set Up Helm
        uses: azure/setup-helm@dda3372f752e03dde6b3237bc9431cdc2f7a02a2 # v5
        with:
          token: ${{ secrets.GITEA_TOKEN }}
          # renovate: datasource=github-releases depName=helm/helm
          version: v4.1.3
          cache: true

      - name: Cache Helm Dependencies
        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5
        with:
          path: |
            ~/.cache/helm
            ~/.config/helm
          key: helm-cache-${{ runner.os }}-${{ hashFiles('infrastructure/clusters/cl01tl/helm/**/Chart.yaml', 'infrastructure/clusters/cl01tl/helm/**/Chart.lock') }}
          restore-keys: |
            helm-cache-${{ runner.os }}-

      - name: Add Repositories
        env:
          CHANGED_CHARTS: ${{ needs.lint-helm.outputs.chart-dir }}
        run: |
          echo ">> Adding repositories for chart dependencies ..."
          echo ""

          for DIR in ${CHANGED_CHARTS}; do
            helm dependency list --max-col-width 120 clusters/${CLUSTER}/helm/${DIR} 2> /dev/null \
              | tail -n +2 \
              | awk 'NF > 0 { print $1, $3 }' \
              | while read -r REPO_NAME REPO_URL; do
                if [[ "${REPO_URL}" == oci://* ]]; then
                  echo ">> Ignoring OCI repo: ${REPO_URL}"

                elif [[ -n "${REPO_NAME}" && -n "${REPO_URL}" ]]; then
                  helm repo add "${REPO_NAME}" "${REPO_URL}"

                fi

              done || true
          done

          if helm repo list > /dev/null 2>&1; then
            echo ""
            echo ">> Update repository cache ..."
            helm repo update

          fi

          echo ""
          echo "----"

      - name: Validate Rendered Templates
        id: validate
        env:
          CHANGED_CHARTS: ${{ needs.lint-helm.outputs.chart-dir }}
        run: |
          SCHEMA_LOCATIONS="-schema-location default -schema-location https://raw.githubusercontent.com/datreeio/CRDs-catalog/main/{{.Group}}/{{.ResourceKind}}_{{.ResourceAPIVersion}}.json"

          EXIT_CODE=0
          FAILED_CHARTS=""

          for DIR in ${CHANGED_CHARTS}; do
            CHART_PATH="clusters/${CLUSTER}/helm/${DIR}"
            echo ""
            echo ">> Validating: ${DIR}"

            helm dependency build "${CHART_PATH}" --skip-refresh

            if ! helm template "${DIR}" "${CHART_PATH}" --include-crds --namespace default --api-versions "gateway.networking.k8s.io/v1/HTTPRoute,monitoring.coreos.com/v1,monitoring.coreos.com/v1/ServiceMonitor" | \
              kubeconform \
                ${SCHEMA_LOCATIONS} \
                -ignore-missing-schemas \
                -strict \
                -summary; then

              EXIT_CODE=1

              if [ -z "${FAILED_CHARTS}" ]; then
                FAILED_CHARTS="${DIR}"

              else
                FAILED_CHARTS="${FAILED_CHARTS}, ${DIR}"

              fi
            fi

          done

          echo ""
          echo "----"

          echo "failed-charts=${FAILED_CHARTS}" >> "$GITHUB_OUTPUT"

          exit $EXIT_CODE

      - name: ntfy Failed
        uses: niniyas/ntfy-action@96acac57fdc91d4c4f50b78486c1ed6f03f9f61c # master
        if: failure()
        with:
          url: '${{ secrets.NTFY_URL }}'
          topic: '${{ secrets.NTFY_TOPIC }}'
          title: 'Kubeconform Test Failure'
          priority: 3
          headers: '{"Authorization": "Bearer ${{ secrets.NTFY_CRED }}"}'
          tags: action,failed
          details: "Kubeconform for cluster '${{ env.CLUSTER }}' failed on charts: ${{ steps.validate.outputs.failed-charts }}"
          icon: 'https://cdn.jsdelivr.net/gh/selfhst/icons/png/gitea.png'
          actions: '[{"action": "view", "label": "View Run", "url": "${{ vars.USER_URL }}/${{ github.repository }}/actions/runs/${{ github.run_id }}", "clear": true}]'
          image: true

  argo-diff:
    needs: lint-helm
    runs-on: ubuntu-js
    if: |
      needs.lint-helm.result == 'success' &&
      needs.lint-helm.outputs.changes-detected == 'true' &&
      github.event_name == 'pull_request'
    steps:
      - name: Checkout
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          fetch-depth: 0

      - name: Cache ArgoCD CLI
        id: cache-argocd
        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5
        with:
          path: /usr/local/bin/argocd
          key: ${{ runner.os }}-argocd-${{ env.ARGOCD_VERSION }}

      - name: Install ArgoCD CLI
        if: steps.cache-argocd.outputs.cache-hit != 'true'
        run: |
          echo ">> Downloading ArgoCD CLI, version: ${{ env.ARGOCD_VERSION }} ..."
          curl -sSL -o argocd-linux-amd64 https://github.com/argoproj/argo-cd/releases/download/${{ env.ARGOCD_VERSION }}/argocd-linux-amd64

          echo ""
          echo ">> Installing ArgoCD CLI ..."
          sudo install -m 555 argocd-linux-amd64 /usr/local/bin/argocd

          echo ""
          echo "----"

      - name: Verify installation
        run: |
          echo ""
          echo ">> Verifying installation ..."
          argocd version --client

          echo ""
          echo "----"

      - name: Set Up Helm
        uses: azure/setup-helm@dda3372f752e03dde6b3237bc9431cdc2f7a02a2 # v5
        with:
          token: ${{ secrets.GITEA_TOKEN }}
          # renovate: datasource=github-releases depName=helm/helm
          version: v4.1.3
          cache: true

      - name: Cache Helm Dependencies
        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5
        with:
          path: |
            ~/.cache/helm
            ~/.config/helm
          key: helm-cache-${{ runner.os }}-${{ hashFiles('infrastructure/clusters/cl01tl/helm/**/Chart.yaml', 'infrastructure/clusters/cl01tl/helm/**/Chart.lock') }}
          restore-keys: |
            helm-cache-${{ runner.os }}-

      - name: Add Repositories
        env:
          CHANGED_CHARTS: ${{ needs.lint-helm.outputs.chart-dir }}
        run: |
          echo ">> Adding repositories for chart dependencies ..."
          echo ""

          for DIR in ${CHANGED_CHARTS}; do
            helm dependency list --max-col-width 120 clusters/${CLUSTER}/helm/${DIR} 2> /dev/null \
              | tail -n +2 \
              | awk 'NF > 0 { print $1, $3 }' \
              | while read -r REPO_NAME REPO_URL; do
                if [[ "${REPO_URL}" == oci://* ]]; then
                  echo ">> Ignoring OCI repo: ${REPO_URL}"

                elif [[ -n "${REPO_NAME}" && -n "${REPO_URL}" ]]; then
                  helm repo add "${REPO_NAME}" "${REPO_URL}"

                fi

              done || true
          done

          if helm repo list > /dev/null 2>&1; then
            echo ""
            echo ">> Update repository cache ..."
            helm repo update

          fi

          echo ""
          echo "----"

      - name: Render Templates
        id: render
        env:
          CHANGED_CHARTS: ${{ needs.lint-helm.outputs.chart-dir }}
        run: |
          for APP_NAME in ${CHANGED_CHARTS}; do
            echo ">> Render templates for ${APP_NAME} ..."
            CHART_PATH="clusters/${CLUSTER}/helm/${APP_NAME}"
            OUTPUT_FOLDER="clusters/${CLUSTER}/manifests/${APP_NAME}/"

            helm dependency build "${CHART_PATH}" --skip-refresh

            local NAMESPACE="${APP_NAME}"
            case "${APP_NAME}" in
              "stack")
                NAMESPACE="argocd"
                echo ">> Special Rendering into 'argocd' namespace ..."
                ;;
              "cilium" | "coredns" | "metrics-server")
                NAMESPACE="kube-system"
                echo ">> Special Rendering for ${APP_NAME} into 'kube-system' namespace ..."
                ;;
              *)
                echo ">> Standard Rendering ..."
            esac

            TEMPLATE=$(helm template "${APP_NAME}" "${CHART_PATH}" --include-crds --namespace "${NAMESPACE}" --include-crds --api-versions "gateway.networking.k8s.io/v1/HTTPRoute,monitoring.coreos.com/v1,monitoring.coreos.com/v1/ServiceMonitor")

            # Format and split rendered template
            echo "${TEMPLATE}" | yq '... comments=""' | yq 'select(. != null)' | yq -s '"'"${OUTPUT_FOLDER}"'" + .kind + "-" + .metadata.name + ".yaml"'

            # Strip comments again to ensure formatting correctness
            for file in "$OUTPUT_FOLDER"/*; do
              yq -i '... comments=""' $file

            done
          done

          echo "----"

      - name: Run App Diff
        id: diff
        env:
          ARGOCD_SERVER: ${{ secrets.ARGOCD_SERVER }}
          ARGOCD_AUTH_TOKEN: ${{ secrets.ARGOCD_AUTH_TOKEN }}
          CHANGED_CHARTS: ${{ needs.lint-helm.outputs.chart-dir }}
        run: |
          # argo diff outputs 1 on any diff, but this is expected, only error on output 2+
          set +e
          OVERALL_EXIT_CODE=0
          FAILED_CHARTS=""
          DIFF_FOUND="false"

          for APP_NAME in ${CHANGED_CHARTS}; do
            echo ">> Running argocd app diff for ${APP_NAME} ..."

            argocd app diff "${APP_NAME}" \
              --server "${ARGOCD_SERVER}" \
              --revision ${{ gitea.sha }} \
              --grpc-web > diff_output_${APP_NAME}.txt

            EXIT_CODE=$?

            if [ -s "diff_output_${APP_NAME}.txt" ]; then
              echo ">> Argo diff:"
              echo ""
              cat diff_output_${APP_NAME}.txt
              echo ""

              DIFF_FOUND="true"

            else
              echo ">> No Argo diff found for ${APP_NAME}"
              rm "diff_output_${APP_NAME}.txt"

            fi

            if [ $EXIT_CODE -eq 2 ]; then
              echo ">> ArgoCD diff failed for ${APP_NAME} due to a manifest error"

              OVERALL_EXIT_CODE=1

              if [ -z "${FAILED_CHARTS}" ]; then
                FAILED_CHARTS="${APP_NAME}"

              else
                FAILED_CHARTS="${FAILED_CHARTS}, ${APP_NAME}"

              fi
            fi
          done

          echo "----"
          echo "diff-detected=${DIFF_FOUND}" >> "$GITHUB_OUTPUT"
          echo "failed-charts=${FAILED_CHARTS}" >> "$GITHUB_OUTPUT"

          exit $OVERALL_EXIT_CODE

      - name: Post Diff
        if: |
          always() &&
          steps.diff.outputs.diff-detected == 'true' &&
          gitea.event.pull_request.number != null
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
        run: |
          COMMENT_BODY="### ArgoCD Diff Results
          "

          for f in diff_output_*.txt; do
            APP_NAME=$(echo $f | sed 's/diff_output_//;s/.txt//')
            DIFF_CONTENT=$(cat "$f")

            COMMENT_BODY="${COMMENT_BODY}
          #### App: ${APP_NAME}
          "

            if [ -z "$DIFF_CONTENT" ]; then
              COMMENT_BODY="${COMMENT_BODY} No changes detected."
            else
              COMMENT_BODY="${COMMENT_BODY}
          \`\`\`diff
          ${DIFF_CONTENT}
          \`\`\`"
            fi
          done

          curl -X 'POST' \
            "${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}/issues/${{ gitea.event.pull_request.number }}/comments" \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: application/json" \
            -d "$(jq -n --arg body "$COMMENT_BODY" '{body: $body}')"

      - name: ntfy Failed
        uses: niniyas/ntfy-action@96acac57fdc91d4c4f50b78486c1ed6f03f9f61c # master
        if: failure()
        with:
          url: '${{ secrets.NTFY_URL }}'
          topic: '${{ secrets.NTFY_TOPIC }}'
          title: 'ArgoCD Diff Failure'
          priority: 3
          headers: '{"Authorization": "Bearer ${{ secrets.NTFY_CRED }}"}'
          tags: action,failed
          details: "ArgoCD diff for cluster '${{ env.CLUSTER }}' failed on charts: ${{ steps.diff.outputs.failed-charts }}"
          icon: 'https://cdn.jsdelivr.net/gh/selfhst/icons/png/gitea.png'
          actions: '[{"action": "view", "label": "View Run", "url": "${{ vars.USER_URL }}/${{ github.repository }}/actions/runs/${{ github.run_id }}", "clear": true}]'
          image: true