name: CI

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]
  workflow_call:

permissions:
  contents: read

jobs:
  # ── PHP Syntax Check ─────────────────────────────────────────────
  lint-php:
    name: PHP Lint (${{ matrix.php }})
    runs-on: ubuntu-latest
    strategy:
      matrix:
        php: [ '8.1', '8.2', '8.3' ]
    steps:
      - uses: actions/checkout@v4

      - name: Set up PHP ${{ matrix.php }}
        uses: shivammathur/setup-php@v2
        with:
          php-version: ${{ matrix.php }}

      - name: Syntax check all PHP files
        run: find . -name "*.php" -not -path "./vendor/*" | xargs -n 1 php -l

      - name: Unit tests (lightweight, no PHPUnit)
        run: |
          for test in tests/unit/test-*.php; do
            echo "=== Running $test ==="
            php "$test"
          done

  # ── WordPress Coding Standards (PHP CodeSniffer) ──────────────────
  lint-phpcs:
    name: WordPress Coding Standards
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Set up PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: '8.1'

      - name: Install Composer dependencies
        run: composer install --no-interaction --prefer-dist --no-progress

      - name: Run PHPCS
        run: composer run lint

  # ── 300-line file check ──────────────────────────────────────────
  file-size:
    name: 300-line file check
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Check no PHP file exceeds 300 lines
        run: |
          violations=0
          while IFS= read -r file; do
            lines=$(wc -l < "$file")
            if [ "$lines" -gt 300 ]; then
              echo "VIOLATION: $file ($lines lines)"
              violations=$((violations + 1))
            fi
          done < <(find . -name "*.php" -not -path "./vendor/*" -not -path "./tests/*")
          if [ "$violations" -gt 0 ]; then
            echo "$violations file(s) exceed 300 lines"
            exit 1
          fi
          echo "All PHP files are 300 lines or fewer."