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: |
          apt-get update -qq
          # Try clang-15+ first (Ubuntu 22.04+)
          if apt-cache show clang-18 >/dev/null 2>&1; then
            apt-get install -y -qq clang-18 ninja-build curl
          elif apt-cache show clang-17 >/dev/null 2>&1; then
            apt-get install -y -qq clang-17 ninja-build curl
          elif apt-cache show clang-16 >/dev/null 2>&1; then
            apt-get install -y -qq clang-16 ninja-build curl
          elif apt-cache show clang-15 >/dev/null 2>&1; then
            apt-get install -y -qq clang-15 ninja-build curl
          else
            # Ubuntu 20.04: install from LLVM repo
            apt-get install -y -qq wget lsb-release
            wget -qO- https://apt.llvm.org/llvm.sh | bash -s -- 18
            apt-get install -y -qq ninja-build curl
          fi

      - name: Install CMake 3.28
        run: |
          curl -sL https://github.com/Kitware/CMake/releases/download/v3.28.6/cmake-3.28.6-linux-x86_64.tar.gz | tar xz -C /usr/local --strip-components=1
          cmake --version

      - name: Build kappa
        run: |
          CC=$(ls /usr/bin/clang-1[5-9] /usr/bin/clang-2[0-9] 2>/dev/null | head -1)
          if [ -z "$CC" ]; then CC=/usr/bin/clang-18; fi
          CXX="${CC}++"
          cmake -B build -G Ninja \
            -DCMAKE_C_COMPILER="$CC" \
            -DCMAKE_CXX_COMPILER="$CXX"
          cmake --build build

      - name: DSL and CLI tests
        run: ./test.sh

      - name: Init-switching tests
        run: ./test-init-switch.sh

      - name: Comprehensive tests
        run: ./test-full.sh