name: CI

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

jobs:
  test:
    name: Lint, Test & Build (Node ${{ matrix.node-version }})
    runs-on: ubuntu-latest
    strategy:
      matrix:
        node-version: [ 18.x, 20.x, 22.x, 24.x ]

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Setup Node.js ${{ matrix.node-version }}
        uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Run Linter
        run: npm run lint

      - name: Run Test Suite
        run: npm test

      - name: Verify Build
        run: npm run build

      - name: Check Bundle Size Budget
        run: npm run check-size

      - name: Verify Working Tree Clean
        run: git diff --exit-code