name: Publish Helm Chart on Release

on:
  release:
    types: [published]

jobs:
  bump-helm-version:
    runs-on: ubicloud-standard-2

    steps:
      - name: Generate an installation token
        id: app
        uses: actions/create-github-app-token@v2
        with:
          app-id: ${{ vars.INTERNAL_APP_ID }}
          private-key: ${{ secrets.INTERNAL_APP_KEY }}
          owner: windmill-labs

      - name: Checkout on helm repository
        uses: actions/checkout@v3
        with:
          repository: windmill-labs/windmill-helm-charts
          token: ${{ steps.app.outputs.token }}

      - name: Get version
        id: get_version
        run: |
          echo "VERSION=${GITHUB_REF#refs/tags/v}" >> $GITHUB_ENV

      - name: Create new branch
        run: |
          # Check if branch already exists remotely
          if git ls-remote --heads origin bump-helm-version-${{ env.VERSION }} | grep -q bump-helm-version-${{ env.VERSION }}; then
            # Branch exists, check it out
            git fetch origin bump-helm-version-${{ env.VERSION }}
            git checkout bump-helm-version-${{ env.VERSION }}
          else
            # Create new branch
            git checkout -b bump-helm-version-${{ env.VERSION }}
          fi

          git config --local user.email "action@github.com"
          git config --local user.name "GitHub Action"

      - name: Bump helm version
        run: |
          # Get current version and increment it by 1
          CURRENT_VERSION=$(grep "version:" ./charts/windmill/Chart.yaml | awk '{print $2}' | head -n 1)
          NEW_VERSION=$(echo "$CURRENT_VERSION" | awk -F. '{$NF = $NF + 1;} 1' | sed 's/ /./g')
          sed -i "s/^version: .*/version: $NEW_VERSION/" ./charts/windmill/Chart.yaml

          # Get the app version from the version
          VERSION=${{ env.VERSION }}
          APP_VERSION=${VERSION#refs/tag/}
          APP_VERSION=${APP_VERSION#v}
          APP_VERSION=${APP_VERSION%/}
          sed -i "s/appVersion: .*/appVersion: $APP_VERSION/" ./charts/windmill/Chart.yaml

      - name: Close existing bump-helm PRs
        env:
          GH_TOKEN: ${{ steps.app.outputs.token }}
        run: |
          # List open PR numbers whose title starts with the prefix
          prs=$(gh pr list \
                  --state open \
                  --search '"helm: bump version to" in:title' \
                  --json number \
                  -q '.[].number')

          for pr in $prs; do
            echo "Closing outdated bump PR #$pr"
            gh pr close "$pr" \
              --comment "Closed automatically – superseded by a newer Helm-chart bump PR."
          done

      - name: Commit and push
        run: |
          git add .
          git commit -m "Bump helm version to ${{ env.VERSION }}"
          git push origin bump-helm-version-${{ env.VERSION }}

      - name: Create PR
        env:
          GH_TOKEN: ${{ steps.app.outputs.token }}
        run: |
          gh pr create \
            --title "helm: bump version to ${{ env.VERSION }}" \
            --body "This PR was auto-generated to bring the helm chart up to date for [release ${{ env.VERSION }}](https://github.com/windmill-labs/windmill/releases/tag/v${{ env.VERSION }}) in the main repo." \
            --head bump-helm-version-${{ env.VERSION }} \
            --base main