name: Build Helm Charts on Tag

# The workflow is triggered when a tag is pushed
on:
  push:
    tags:
      - "chart-*"
  workflow_dispatch:
    inputs:
      chart_tag:
        description: "Existing chart tag to release, for example chart-2.0.5"
        required: true
        type: string

jobs:
  release:
    permissions:
      contents: read
      packages: write
    runs-on: ubuntu-latest
    env:
      CHART_REPOSITORY: ${{ github.repository_owner }}/librechat-chart
    steps:
      - name: Resolve chart tag
        id: chart-version
        env:
          EVENT_NAME: ${{ github.event_name }}
          INPUT_CHART_TAG: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.chart_tag || '' }}
          REF_NAME: ${{ github.ref_name }}
        run: |
          set -euo pipefail
          CHART_TAG="$REF_NAME"
          if [ "$EVENT_NAME" = "workflow_dispatch" ]; then
            CHART_TAG="$INPUT_CHART_TAG"
          fi

          CHART_VERSION="${CHART_TAG#chart-}"
          SEMVER_REGEX='^[0-9]+[.][0-9]+[.][0-9]+(-[0-9A-Za-z.-]+)?([+][0-9A-Za-z.-]+)?$'
          if [[ "$CHART_TAG" != chart-* || ! "$CHART_VERSION" =~ $SEMVER_REGEX ]]; then
            echo "::error::Chart tags must use the form chart-<semver>, for example chart-2.0.3"
            exit 1
          fi

          {
            printf 'CHART_REF=refs/tags/%s\n' "$CHART_TAG"
            printf 'CHART_TAG=%s\n' "$CHART_TAG"
            printf 'CHART_VERSION=%s\n' "$CHART_VERSION"
          } >> "$GITHUB_OUTPUT"

      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          persist-credentials: false
          ref: ${{ steps.chart-version.outputs.CHART_REF }}

      - name: Configure Git
        run: |
          git config user.name "$GITHUB_ACTOR"
          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"

      - name: Install Helm
        uses: azure/setup-helm@v4
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
      
      - name: Build Subchart Deps
        run: |
          cd helm/librechat
          helm dependency build  
          cd ../librechat-rag-api
          helm dependency build      

      # Log in to GitHub Container Registry
      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Run Helm OCI Charts Releaser
      # This is for the librechat chart
      - name: Release Helm OCI Charts for librechat
        uses: appany/helm-oci-chart-releaser@v0.4.2
        with:
          name: librechat
          repository: ${{ env.CHART_REPOSITORY }}
          tag: ${{ steps.chart-version.outputs.CHART_VERSION }}
          path: helm/librechat
          registry: ghcr.io
          registry_username: ${{ github.actor }}
          registry_password: ${{ secrets.GITHUB_TOKEN }}
      
      # this is for the librechat-rag-api chart
      - name: Release Helm OCI Charts for librechat-rag-api
        uses: appany/helm-oci-chart-releaser@v0.4.2
        with:
          name: librechat-rag-api
          repository: ${{ env.CHART_REPOSITORY }}
          tag: ${{ steps.chart-version.outputs.CHART_VERSION }}
          path: helm/librechat-rag-api
          registry: ghcr.io
          registry_username: ${{ github.actor }}
          registry_password: ${{ secrets.GITHUB_TOKEN }}