name: lint-test-helm

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

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

env:
  CLUSTER: cl01tl
  BASE_BRANCH: "origin/${{ gitea.base_ref }}"

jobs:
  lint-helm:
    runs-on: ubuntu-js
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Check Branch Exists
        id: check-branch-exists
        if: github.event_name == 'pull_request'
        uses: GuillaumeFalourd/branch-exists@v1.1
        with:
          branch: ${{ gitea.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: |
          echo ">> Branch ${{ gitea.base_ref }} exists, will continue with linting"

          echo "----"

          echo "exists=true" >> $GITEA_OUTPUT

      - name: Set up Helm
        if: steps.branch-exists.outputs.exists == 'true'
        uses: azure/setup-helm@v4
        with:
          token: ${{ secrets.GITEA_TOKEN }}
          version: v3.19.2

      - name: Check Directories for Changes
        id: check-dir-changes
        if: steps.branch-exists.outputs.exists == 'true'
        run: |
          CHANGED_CHARTS=()
          GIT_DIFF=()

          echo ">> Target branch for diff is: ${BASE_BRANCH}"
          echo ""

          if [ "${{ github.event_name }}" == "pull_request" ]; then
            echo ""
            echo ">> Checking for changes in a pull request ..."
            GIT_DIFF=$(git diff --name-only "${BASE_BRANCH}" | xargs -I {} dirname {} | sort -u | grep "clusters/*/helm/**")
          else
            echo ""
            echo ">> Checking for changes from a push ..."
            GIT_DIFF=$(git diff --name-only ${{ gitea.event.before }}..HEAD | xargs -I {} dirname {} | sort -u | grep "clusters/*/helm/**")
          fi

          if [ -n "${GIT_DIFF}" ]; then
            echo ""
            echo ">> Changes detected:"
            echo "$GIT_DIFF"

            for path in $GIT_DIFF; do
              CHANGED_CHARTS+=$(echo "$path" | awk -F '/' '{print $4}')
            done

          else
            echo ""
            echo ">> No changes detected"

          fi

          if [ -n "${CHANGED_CHARTS}" ]; then
            echo ""
            echo ">> Chart to Lint:"
            echo "$(echo "${CHANGED_CHARTS[@]}" | sort -u)"

            echo "----"

            echo "changes-detected=true" >> $GITEA_OUTPUT
            echo "chart-dir<<EOF" >> $GITEA_OUTPUT
            echo "$(echo "${CHANGED_CHARTS[@]}" | sort -u)" >> $GITEA_OUTPUT
            echo "EOF" >> $GITEA_OUTPUT
          else
            echo "changes-detected=false" >> $GITEA_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 ..."
          for dir in ${CHANGED_CHARTS}; do
            helm dependency list --max-col-width 120 clusters/${CLUSTER}/helm/$dir 2> /dev/null \
              | tail +2 | head -n -1 \
              | awk '{ print "helm repo add " $1 " " $3 }' \
              | while read cmd; do echo "$cmd" | sh; done || true
          done

          if helm repo list | tail +2 | read -r; then
            echo ""
            echo ">> Update repository cache ..."
            helm repo update
          fi

          echo "----"

      - name: Lint Helm Chart
        if: steps.check-dir-changes.outputs.changes-detected == 'true'
        env:
          CHANGED_CHARTS: ${{ steps.check-dir-changes.outputs.chart-dir }}
        run: |
          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
              cd $chart_path

              echo ""
              echo ">> Building helm dependency ..."
              helm dependency build --skip-refresh

              echo ""
              echo ">> Linting helm ..."
              helm lint --namespace "$chart_name"

            else
              echo ""
              echo ">> Directory $chart_path does not contain a Chart.yaml. Skipping ..."
              echo ""
            fi
          done

      - name: ntfy Failed
        uses: niniyas/ntfy-action@master
        if: failure()
        with:
          url: '${{ secrets.NTFY_URL }}'
          topic: '${{ secrets.NTFY_TOPIC }}'
          title: 'Test Failure - Infrastructure'
          priority: 3
          headers: '{"Authorization": "Bearer ${{ secrets.NTFY_CRED }}"}'
          tags: action,failed
          details: 'Helm linting on Pull Request for Infrastructure has failed!'
          icon: 'https://cdn.jsdelivr.net/gh/selfhst/icons/png/gitea.png'
          actions: '[{"action": "view", "label": "Open Gitea", "url": "https://gitea.alexlebens.dev/alexlebens/infrastructure/actions?workflow=lint-test-helm-pull.yaml", "clear": true}]'
          image: true