name: Branch Name Check

on:
  pull_request:
    branches:
      - develop
      - main
    types: [opened, synchronize, edited]

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  check-branch-name:
    runs-on: ubuntu-latest
    outputs:
      source-branch: ${{ steps.branch-name-check.outputs.source-branch }}
      target-branch: ${{ steps.branch-name-check.outputs.target-branch }}
    steps:
    - name: Extract branch names
      id: branch-name-check
      run: |
        source_branch=$(jq -r .pull_request.head.ref "$GITHUB_EVENT_PATH")
        target_branch=$(jq -r .pull_request.base.ref "$GITHUB_EVENT_PATH")

        echo "Source-branch=$source_branch" >> $GITHUB_OUTPUT
        echo "target-branch=$target_branch" >> $GITHUB_OUTPUT

    - name: Show Output result for source-branch and target-branch
      run: |
        echo "source-branch=${{ steps.branch-name-check.outputs.source-branch }}"
        echo "target-branch=${{ steps.branch-name-check.outputs.target-branch }}"

    - name: Check branch name for develop PRs
      if: ${{ steps.branch-name-check.outputs.target-branch == 'develop' }}
      run: |
        if [[ "${{ steps.branch-name-check.outputs.source-branch }}" =~ ^(main|feature/.*|docs/.*|hotfix/.*|release/[0-9]+\.[0-9]+\.[0-9]+(rc[0-9]+)?)$ ]]; then
          echo "Branch name is valid"
        else
          echo "Invalid branch name. Branches must follow the GitFlow naming convention to be allowed to merge into the develop branch."
          exit 1
        fi

    - name: Check branch name for main PRs
      if: ${{ steps.branch-name-check.outputs.target-branch == 'main' }}
      run: |
        if [[ "${{ steps.branch-name-check.outputs.source-branch }}" =~ ^(hotfix/.*|release/[0-9]+\.[0-9]+\.[0-9]+(rc[0-9]+)?)$ ]]; then
          echo "PR is from a hotfix or release branch and targets the main branch"
        else
          echo "PR is not from a hotfix or release branch. Pull requests must be from a hotfix or release branch and target the main branch"
          exit 1
        fi