name: services/www - next/checkout-release-branch

on:
  workflow_dispatch:

permissions:
  contents: read
  actions: read

jobs:
  workflow-release-branch:
    name: Workflow - Create or Update Release Branch
    runs-on: ubuntu-latest
    permissions:
      contents: write
      actions: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Determine Mode and Branch Name
        id: plan
        run: |
          REF="${{ github.ref_name }}"
          if [[ "$REF" =~ ^releases/www/v[0-9]+\.[0-9]+$ ]]; then
            # Dispatched against an existing release branch: update it.
            echo "mode=update" >> "$GITHUB_OUTPUT"
            echo "branch_name=$REF" >> "$GITHUB_OUTPUT"
          else
            # Dispatched against next (or any other ref): create a new release branch.
            BRANCH_NAME=$(bash ci/scripts/semantic-release.sh checkout services/www)
            echo "mode=create" >> "$GITHUB_OUTPUT"
            echo "branch_name=$BRANCH_NAME" >> "$GITHUB_OUTPUT"
          fi

      - name: Create and Push Branch
        if: steps.plan.outputs.mode == 'create'
        run: |
          git checkout -b ${{ steps.plan.outputs.branch_name }}
          git push origin ${{ steps.plan.outputs.branch_name }}

      - name: Rebase Existing Branch onto next
        if: steps.plan.outputs.mode == 'update'
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          # Bring the release branch up to date with its father (next),
          # replaying any release-branch-only commits on top of the latest next.
          git fetch origin next
          git rebase FETCH_HEAD
          git push --force-with-lease origin ${{ steps.plan.outputs.branch_name }}

      - name: Trigger Release Workflow
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh workflow run services-www-releases-required.yml --ref ${{ steps.plan.outputs.branch_name }}