name: CI

on:
  push:
    branches: [ "main", "master" ]
  pull_request:
    branches: [ "main", "master" ]

jobs:
  check:
    name: Lint, fmt-check, and tests
    runs-on: ubuntu-latest
    steps:
      - name: Check out code
        uses: actions/checkout@v6

      - name: Set up Go
        uses: actions/setup-go@v6
        with:
          go-version: '1.25.5'

      - name: Cache Go modules
        uses: actions/cache@v5
        with:
          path: |
            ~/.cache/go-build
            # Module cache
            ${{ github.workspace }}/pkg/mod
          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
          restore-keys: |
            ${{ runner.os }}-go-

      - name: Run gofmt (check)
        run: |
          echo "Checking formatting with gofmt..."
          fmt_output=$(gofmt -l . || true)
          if [ -n "$fmt_output" ]; then
            echo "The following files need formatting:"
            echo "$fmt_output"
            echo "Run 'gofmt -w .' to fix."
            exit 1
          fi

      - name: Run golangci-lint
        uses: golangci/golangci-lint-action@v9
        with:
          version: v2.8.0
          args: --timeout=5m ./...
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Run tests
        run: |
          go test ./... -v
          
  build:
    name: Build binaries
    runs-on: ubuntu-latest
    strategy:
      matrix:
        include:
          - goos: linux
            goarch: amd64
            cgo: 0
          - goos: darwin
            goarch: arm64
            cgo: 0
          - goos: android
            goarch: arm64
            cgo: 1
            api: 21
          # you can add more (android/arm, windows, etc.) later

    steps:
      - name: Check out code
        uses: actions/checkout@v6
        with:
          fetch-tags: true

      - name: Set up Go
        uses: actions/setup-go@v6
        with:
          go-version: '1.25.5'

      # Install Android NDK for android rows and expose ndk-path output
      - name: Setup Android NDK
        if: matrix.goos == 'android'
        id: setup-ndk
        uses: nttld/setup-ndk@v1
        with:
          ndk-version: r26d
          add-to-path: false

      - name: Build
        env:
          GOOS: ${{ matrix.goos }}
          GOARCH: ${{ matrix.goarch }}
          CGO_ENABLED: ${{ matrix.cgo }}
          ANDROID_API: ${{ matrix.api }}
          ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}
        run: |
          echo "Building for $GOOS/$GOARCH (CGO_ENABLED=$CGO_ENABLED)"

          # If this is an Android build, point CC at the NDK toolchain clang
          if [ "$GOOS" = "android" ]; then
            if [ -z "$ANDROID_NDK_HOME" ]; then
              echo "ANDROID_NDK_HOME is not set – did setup-ndk run?"
              exit 1
            fi

            TOOLCHAIN_BIN="$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin"

            if [ "$GOARCH" = "arm64" ]; then
              export CC="$TOOLCHAIN_BIN/aarch64-linux-android${ANDROID_API}-clang"
            elif [ "$GOARCH" = "arm" ]; then
              export CC="$TOOLCHAIN_BIN/armv7a-linux-androideabi${ANDROID_API}-clang"
            else
              echo "Unsupported ANDROID GOARCH=$GOARCH"
              exit 1
            fi

            echo "Using Android NDK CC=$CC"
          fi

          mkdir -p dist

          ext=""
          if [ "$GOOS" = "windows" ]; then
            ext=".exe"
          fi

          GOOS=$GOOS GOARCH=$GOARCH \
          go build -ldflags "-s -w -checklinkname=0" -trimpath \
            -o "dist/client-${GOOS}-${GOARCH}${ext}" \
            ./client
          
          GOOS=$GOOS GOARCH=$GOARCH \
          go build -ldflags "-s -w -checklinkname=0" -trimpath \
            -o "dist/server-${GOOS}-${GOARCH}${ext}" \
            ./server

      - name: Upload artifact
        uses: actions/upload-artifact@v6
        with:
          name: good-turn-${{ matrix.goos }}-${{ matrix.goarch }}
          path: dist/**