---
# template source: https://github.com/bretfisher/docker-build-workflow/blob/main/templates/call-docker-build.yaml
name: Helm Charts

on: [push,pull_request,workflow_dispatch]
  # push: &helmPaths # turns out gitea don't handle well the paths filter
  #   paths:
  #     - '*/\.yaml'
  #     - '*/\.tpl'
  #     - '*/NOTES.txt'
  #     - '*/\.helmignore'
  # pull_request: *helmPaths

# cancel any previously-started, yet still active runs of this workflow on the same branch
concurrency:
  group: ${{ github.ref }}-${{ github.workflow }}
  cancel-in-progress: true

.helm_install_dependencies_sh: &helm_install_dependencies_sh |-
  helm_install_dependencies() {
    chart_file="$1/Chart.yaml"
    [[ ! -f "$chart_file" ]] && echo "Chart.yaml not found in $1" && return 1

    yq eval '.dependencies[]' "$chart_file" -o=json | jq -c '.' | while IFS= read -r dep; do
      name=$(jq -r '.name' <<< "$dep")
      version=$(jq -r '.version' <<< "$dep")
      repo=$(jq -r '.repository' <<< "$dep")
      url=$(curl -s "${repo}/index.yaml" | yq eval ".entries.${name}[] | select(.version == \"${version}\") | .urls[0]" -)

      echo "Dependency: $name, Version: $version, URL: $url"
      mkdir -p "$1/charts" && curl -sL "$url" -o "$1/charts/${name}-${version}.tgz"
    done
  }
  helm_install_dependencies $chart


jobs:
  filter-chart:
    name: Detect changed charts
    runs-on: ubuntu-latest
    outputs:
      library_charts: ${{steps.filter-charts.outputs.library_charts}}
      application_charts: ${{steps.filter-charts.outputs.application_charts}}
    steps:
      - uses: actions/checkout@v4

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v45

      - name: Filter modified charts
        id: filter-charts
        run: |
          echo "Changed files:"
          echo "${{ steps.changed-files.outputs.all_changed_files }}"

          # Find unique directories that contain Chart.yaml among the changed files
          modified_dirs=$(echo "${{ steps.changed-files.outputs.all_changed_files }}" | tr ' ' '\n' | xargs -n1 dirname | sort -u || true)

          # Initialize an array to store directories that contain Chart.yaml
          helm_chart_dirs=()

          # Function to find the closest directory containing Chart.yaml
          find_chart_root() {
            dir="$1"
            while [[ "$dir" != "/" && "$dir" != "." ]]; do
              if [[ -f "$dir/Chart.yaml" ]]; then
                echo "$dir"
                return
              fi
              dir=$(dirname "$dir")
            done
          }

          # Iterate over each modified directory and find the root chart directory
          for dir in $modified_dirs; do
            chart_dir=$(find_chart_root "$dir")
            if [[ -n "$chart_dir" && ! " ${helm_chart_dirs[*]} " =~ " ${chart_dir} " ]]; then
              helm_chart_dirs+=("$chart_dir")
            fi
          done

          # Initialize arrays for library and application charts
          library_dirs=()
          application_dirs=()

          # Iterate over each modified directory and check the 'type' field in Chart.yaml
          for dir in ${helm_chart_dirs[@]}; do
            chart_type=$(yq eval '.type' "$dir/Chart.yaml" || echo "undefined")

            # Add directories to corresponding arrays based on the 'type'
            if [[ "$chart_type" == "library" ]]; then
              library_dirs+=("$dir")
            elif [[ "$chart_type" == "application" ]]; then
              application_dirs+=("$dir")
            fi
          done

          # Convert the arrays to JSON format
          library_json=$(printf '%s\n' "${library_dirs[@]}" | jq -R . | jq -cs 'map(select(. != ""))')
          application_json=$(printf '%s\n' "${application_dirs[@]}" | jq -R . | jq -cs 'map(select(. != ""))')

          # Output the JSON arrays
          echo "Modified Helm library charts directories: $library_json"
          echo "library_charts=$library_json" >> $GITHUB_OUTPUT

          echo "Modified Helm application charts directories: $application_json"
          echo "application_charts=$application_json" >> $GITHUB_OUTPUT

  library-charts: &charts-matrix-job
    name: Library charts ${{ matrix.chart }}
    runs-on: ubuntu-latest
    needs: filter-chart
    strategy:
      matrix:
        chart: [tool] # turns out gitea doesn't support dynamic matrix
        # chart: ${{ fromJson(needs.filter-chart.outputs.library_charts) }}
        type: [library]
    if: >-
      ${{
      always() && !contains(needs.*.result, 'failure') && needs.filter-chart.result == 'success'
      && (
        contains(fromJson(needs.filter-chart.outputs.library_charts), matrix.chart)
        || contains(fromJson(needs.filter-chart.outputs.application_charts), matrix.chart)
      )
      && (
        contains(fromJSON('["","pull_request"]'), github.event_name)
        || github.ref == 'refs/heads/main'
      ) }}
    env:
      chart: ${{ matrix.chart }}
    steps:

      - uses: actions/checkout@v4

      - run: *helm_install_dependencies_sh

      - name: Install Helm for test
        if: >-
          ${{
            matrix.type != 'library'
            && (
              contains(fromJSON('["","pull_request"]'), github.event_name)
              || github.ref != 'refs/heads/main'
            )
          }}
        uses: azure/setup-helm@v4
      - name: Helm template
        if: >-
          ${{
            matrix.type != 'library'
            && (
              contains(fromJSON('["","pull_request"]'), github.event_name)
              || github.ref != 'refs/heads/main'
            )
          }}
        run: helm template $chart --debug

      - name: publish ${{ matrix.chart }} helm chart
        if: ${{ contains(fromJSON('["","push"]'), github.event_name) && github.ref == 'refs/heads/main' }}
        run: |
          set -x
          chart=${chart:-tool}
          chart_version=`yq eval .version ${chart}/Chart.yaml`
          chart_package=${chart}-${chart_version}.tgz
          # helm package ${chart}
          tar -X ${chart}/.helmignore -czf ${chart_package} ${chart}
          curl --user ${{ github.actor }}:${{ secrets.PACKAGES_TOKEN }} -X POST --upload-file ./${chart_package} https://gitea.arcodange.duckdns.org/api/packages/${{ github.repository_owner }}/helm/api/charts

  application-charts:
    <<: *charts-matrix-job
    name: Application charts ${{ matrix.chart }}
    needs: [filter-chart,library-charts]
    strategy:
      matrix:
        # chart: ${{ fromJson(needs.filter-chart.outputs.application_charts) }}
        chart: [pgcat]
        type: [application]