name: Helm Release

on:
  release:
    types: [published]
    branches:
      - main
      - nightly
  push:
    branches:
      - nightly
    paths:
      - "functions/kubernetes/charts/**"
  workflow_dispatch:

permissions:
  contents: read
  packages: write

jobs:
  main:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install apt dependencies
        run: |
          curl https://baltocdn.com/helm/signing.asc | gpg --dearmor | sudo tee /usr/share/keyrings/helm.gpg > /dev/null
          sudo apt-get install apt-transport-https -y --no-install-recommends
          echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/helm.gpg] https://baltocdn.com/helm/stable/debian/ all main" | sudo tee /etc/apt/sources.list.d/helm-stable-debian.list
          sudo apt-get update
          sudo apt-get install helm -y --no-install-recommends

      - name: Set versions
        id: set_versions
        run: |
          if [[ ${{ github.event_name }} == 'release' ]]; then
            CHART_VERSION="${{ github.event.release.tag_name }}"
            APP_VERSION="${{ github.event.release.tag_name }}"
          else
            CHART_VERSION="0.0.0-nightly-untagged-latest"
            APP_VERSION="nightly"
          fi

          echo "CHART_VERSION set to ${CHART_VERSION}. Validating..."

          # https://semver.org/#is-there-a-suggested-regular-expression-regex-to-check-a-semver-string
          SEMVER_REGEX="^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$"

          if echo "${CHART_VERSION}" | grep -Pq "${SEMVER_REGEX}"; then
            echo "${CHART_VERSION} is a valid SemVer string";
          else
            echo "${CHART_VERSION} is an invalid SemVer string";
            exit 1;
          fi

          echo "CHART_VERSION=${CHART_VERSION}" >> $GITHUB_OUTPUT
          echo "APP_VERSION=${APP_VERSION}" >> $GITHUB_OUTPUT

      - name: Update helm dependencies
        run: helm dependency update ./functions/kubernetes/charts/shuffle

      - name: Package Helm chart
        run: helm package ./functions/kubernetes/charts/shuffle --version "${CHART_VERSION}" --app-version="${APP_VERSION}" --destination ./functions/kubernetes/charts

      - name: Login to OCI registry (ghcr.io)
        run: helm registry login ghcr.io --username ${{ github.actor }} --password ${{ secrets.GITHUB_TOKEN }}

      - name: Push helm chart
        run: helm push ./functions/kubernetes/charts/shuffle-*.tgz oci://ghcr.io/shuffle/shuffle/charts