name: Branch Naming

on:
  pull_request:
    types: [opened, synchronize, reopened]

permissions:
  contents: read

jobs:
  check-branch-name:
    name: Branch Name Convention
    runs-on: ubuntu-latest
    if: github.event.pull_request.draft == false
    steps:
      - name: Check branch name
        run: |
          BRANCH="${GITHUB_HEAD_REF}"
          echo "Branch: $BRANCH"

          # Allow long-running branches
          if [[ "$BRANCH" =~ ^(main|develop|staging)$ ]]; then
            echo "✅ Long-running branch: $BRANCH"
            exit 0
          fi

          # Allow dependabot branches
          if [[ "$BRANCH" =~ ^dependabot/ ]]; then
            echo "✅ Dependabot branch: $BRANCH"
            exit 0
          fi

          # Enforce prefix/description pattern
          PATTERN="^(feature|feat|fix|hotfix|docs|chore|refactor|test)/[a-z0-9][a-z0-9-]*$"
          if [[ ! "$BRANCH" =~ $PATTERN ]]; then
            echo "❌ Branch name '$BRANCH' doesn't match convention."
            echo ""
            echo "Expected format: <prefix>/<description>"
            echo "  Prefixes: feature, feat, fix, hotfix, docs, chore, refactor, test"
            echo "  Description: lowercase, hyphens, no special chars"
            echo ""
            echo "Examples:"
            echo "  feature/42-add-search-filter"
            echo "  fix/chrome-orphan-cleanup"
            echo "  hotfix/critical-api-fix"
            echo "  docs/update-docker-guide"
            exit 1
          fi

          echo "✅ Branch name '$BRANCH' follows convention."