name: Prepare release
on:
  workflow_dispatch:
    inputs:
      version:
        description: 'The version to release, e.g. 1.30.0'
        required: true

permissions:
  contents: read

jobs:
  create-pull-request:
    permissions:
      contents: write # required for pushing changes
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

      - name: Validate version
        run: |
          version=${{ inputs.version }}
          if [[ ! "$version" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "unexpected version: $version"
            exit 1
          fi

      - name: Use CLA approved github bot
        run: .github/scripts/use-cla-approved-github-bot.sh

      - name: Update schema files
        run: |
          if ! grep -q "^  next:$" schema-next.yaml; then
            echo "String 'next:' not found in the file"
            exit 1
          fi

          version=${{ inputs.version }}
          make generate-schema-next SCHEMA_NEXT_VERSION=$version
          git add "schemas/$version"

      - name: Update change log
        run: |
          make chlog-update VERSION=v${{ inputs.version }}

      - uses: actions/create-github-app-token@a8d616148505b5069dccd32f177bb87d7f39123b # v2.1.1
        id: otelbot-token
        with:
          app-id: ${{ vars.OTELBOT_APP_ID }}
          private-key: ${{ secrets.OTELBOT_PRIVATE_KEY }}

      - name: Create pull request
        env:
          # not using secrets.GITHUB_TOKEN since pull requests from that token do not run workflows
          GH_TOKEN: ${{ steps.otelbot-token.outputs.token }}
        run: |
          version=${{ inputs.version }}
          message="[chore] Prepare release v${version}"
          body="Prepare release \`v${version}\`."
          branch="otelbot/prepare-release-v${version}"

          git checkout -b $branch
          git commit -a -m "$message"
          git push --set-upstream origin $branch
          gh pr create --title "$message" \
                       --body "$body" \
                       --base main
