name: CI

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

jobs:
  build-and-test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y libpulse-dev || true

      - name: Build
        run: |
          mkdir build
          cd build
          cmake ..
          make -j$(nproc)

      - name: Interpreter tests
        run: bash tests/run_tests.sh

      - name: Compiler tests
        run: bash tests/run_compiler_tests.sh

      - name: Cross-language (FFI) test
        run: bash tests/run_ffi_test.sh

  dos-cross-compile:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Cache OpenWatcom V2
        id: cache-watcom
        uses: actions/cache@v4
        with:
          path: ~/openwatcom-v2
          key: openwatcom-v2-snapshot

      - name: Install OpenWatcom V2
        if: steps.cache-watcom.outputs.cache-hit != 'true'
        run: |
          mkdir -p ~/openwatcom-v2
          curl -L -o /tmp/ow-snapshot.tar.xz \
            https://github.com/open-watcom/open-watcom-v2/releases/download/Last-CI-build/ow-snapshot.tar.xz
          tar -xJf /tmp/ow-snapshot.tar.xz -C ~/openwatcom-v2
          rm -f /tmp/ow-snapshot.tar.xz

      - name: Configure OpenWatcom env
        run: |
          # Generate the setvars.sh that build_dos.sh sources automatically.
          # The cache step skips its creation step so this also runs on
          # cache hits; -f overwrites without complaint.
          cat > ~/openwatcom-v2/setvars.sh <<'EOF'
          export WATCOM=$HOME/openwatcom-v2
          export PATH=$WATCOM/binl64:$WATCOM/binl:$PATH
          export EDPATH=$WATCOM/eddat
          export INCLUDE=$WATCOM/h
          EOF
          chmod +x ~/openwatcom-v2/setvars.sh
          # Also export to subsequent steps directly so a missing
          # setvars.sh on a future runner doesn't silently break the build.
          {
            echo "WATCOM=$HOME/openwatcom-v2"
            echo "EDPATH=$HOME/openwatcom-v2/eddat"
            echo "INCLUDE=$HOME/openwatcom-v2/h"
          } >> "$GITHUB_ENV"
          echo "$HOME/openwatcom-v2/binl64" >> "$GITHUB_PATH"
          echo "$HOME/openwatcom-v2/binl"   >> "$GITHUB_PATH"

      - name: Build 16-bit DOS target
        run: |
          ./build_dos.sh 16
          mkdir -p .ci-stash
          cp gwbasic16.exe .ci-stash/

      - name: Build 32-bit DOS target
        run: |
          ./build_dos.sh clean
          ./build_dos.sh 32
          cp gwbasic.exe .ci-stash/

      - name: Verify binary sizes look sane
        run: |
          size16=$(stat -c%s .ci-stash/gwbasic16.exe)
          size32=$(stat -c%s .ci-stash/gwbasic.exe)
          echo "gwbasic16.exe = $size16 bytes"
          echo "gwbasic.exe   = $size32 bytes"
          [ "$size16" -gt 80000 ]  && [ "$size16" -lt 200000 ]
          [ "$size32" -gt 100000 ] && [ "$size32" -lt 500000 ]

      - name: Upload DOS artifacts
        uses: actions/upload-artifact@v4
        with:
          name: dos-binaries
          path: .ci-stash/*.exe