name: "update helm release"
description: "deploy helm release with new image"

inputs:
  release_name:
    required: true

  image_paths:
    required: false
    default: "image.tag" # NOTE space separated

  namespace:
    required: false
    default: ""

  image_tag:
    required: false
    default: ""

  repository_location:
    required: false
    default: "europe-docker.pkg.dev/puzzle-and-play/helm"

  timeout:
    required: false
    default: "5m"

runs:
  using: composite
  steps:
    - shell: bash
      env:
        RELEASE_NAME: "${{ inputs.release_name }}"
        NAMESPACE: "${{ inputs.namespace }}"
        REPOSITORY_LOCATION: "${{ inputs.repository_location }}"
        HELM_CHARTS_DIR: "$HOME/.cache/helm/charts"
        IMAGE_PATHS: "${{ inputs.image_paths }}"
        IMAGE_TAG: "${{ inputs.image_tag }}"
        HELM_UPGRADE_TIMEOUT: "${{ inputs.timeout }}"

      run: |
        : ${NAMESPACE:="$RELEASE_NAME"}
        : ${IMAGE_TAG:="${{ github.ref_name }}-${{ github.run_number }}"}

        metadata=$(helm get metadata $RELEASE_NAME -n $NAMESPACE -o json)
        chart_name=$(echo $metadata | jq ".chart" -r)
        chart_version=$(echo $metadata | jq ".version" -r)

        HELM_CHARTS_DIR=$(echo "$HELM_CHARTS_DIR" | envsubst)
        mkdir -p "$HELM_CHARTS_DIR"
        helm pull \
          "oci://$REPOSITORY_LOCATION/$chart_name" \
          --version "$chart_version" \
          -d "$HELM_CHARTS_DIR"

        chart_filename="${HELM_CHARTS_DIR}/${chart_name}-${chart_version}.tgz"

        value_overrides=$(\
          echo "\"$IMAGE_PATHS\"" \
          | jq -r '. | split(" ") | map(. + "=$IMAGE_TAG") | join(",")' \
          | envsubst \
        )

        helm upgrade \
          "$RELEASE_NAME" \
          "$chart_filename" \
          --version "$chart_version" \
          --namespace "$NAMESPACE" \
          --reuse-values \
          --set "$value_overrides" \
          --timeout "$HELM_UPGRADE_TIMEOUT"