name: CI

on:
  push:
    branches: [main]
  pull_request:

permissions:
  contents: read

jobs:
  quality:
    runs-on: ubuntu-latest
    steps:
      - name: Check out repository
        uses: actions/checkout@v4
      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version-file: go.mod
          cache: true
      - name: Check formatting
        run: |
          files="$(gofmt -l .)"
          if [ -n "$files" ]; then
            echo "Unformatted Go files:"
            echo "$files"
            exit 1
          fi
      - name: Check module files
        run: go mod tidy && git diff --exit-code

  test:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - name: Check out repository
        uses: actions/checkout@v4
      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version-file: go.mod
          cache: true
      - name: Resolve modules
        run: go mod download
      - name: Test
        run: go test ./...
      - name: Vet
        run: go vet ./...