name: "PR Formatting"

on:
  pull_request:
    types:
      - opened
      - reopened
      - edited
      - synchronize

jobs:
  title-check:
    name: Title Check
    runs-on: ubuntu-latest
    steps:
      - name: Check PR Title Format
        run: |
          PR_TITLE="${{ github.event.pull_request.title }}"
          echo "Checking PR title: $PR_TITLE"
          
          # Conventional commit pattern: type(scope): description or type: description
          # Types: feat, fix, docs, style, refactor, perf, test, build, ci, chore, revert
          PATTERN="^(feat|fix|docs|style|refactor|perf|test|build|ci|chore|revert)(\([a-zA-Z0-9_-]+\))?: .+"
          
          if echo "$PR_TITLE" | grep -qE "$PATTERN"; then
            echo "✓ PR title follows conventional commit format"
          else
            echo "✗ PR title does not follow conventional commit format"
            echo ""
            echo "Expected format: type(scope): description"
            echo "  or: type: description"
            echo ""
            echo "Valid types: feat, fix, docs, style, refactor, perf, test, build, ci, chore, revert"
            echo ""
            echo "Examples:"
            echo "  feat(reader): add bookmark sync feature"
            echo "  fix: resolve memory leak in epub parser"
            echo "  docs: update README with new instructions"
            exit 1
          fi