name: Build All Languages

on:
  push:
  pull_request:

jobs:
  build:
    name: Build
    runs-on: ubuntu-latest
    timeout-minutes: 60

    env:
      # Cache paths
      CARGO_HOME: ${{ github.workspace }}/.cargo
      RUSTUP_HOME: ${{ github.workspace }}/.rustup
      JULIA_DEPOT_PATH: ${{ github.workspace }}/.julia
      R_LIBS_USER: ${{ github.workspace }}/.Rpackages

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

      - name: Install system dependencies (gfortran, cmake, etc.)
        run: |
          sudo apt-get update
          sudo apt-get install -y gfortran cmake libssl-dev pkg-config

      - name: Setup Rust
        uses: dtolnay/rust-toolchain@stable
        with:
          toolchain: stable
          components: rustfmt, clippy

      - name: Cache Cargo registry
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
          restore-keys: |
            ${{ runner.os }}-cargo-

      - name: Setup Julia
        uses: julia-actions/setup-julia@v1
        with:
          version: '1.10'
          arch: x64

      - name: Cache Julia depot
        uses: actions/cache@v4
        with:
          path: ${{ env.JULIA_DEPOT_PATH }}
          key: ${{ runner.os }}-julia-${{ hashFiles('**/Project.toml', '**/Manifest.toml') }}
          restore-keys: |
            ${{ runner.os }}-julia-

      - name: Setup Elixir (and Erlang)
        uses: erlef/setup-beam@v1
        with:
          elixir-version: '1.16'
          otp-version: '26.2'

      - name: Setup R
        uses: r-lib/actions/setup-r@v2
        with:
          r-version: 'release'
          use-public-rspm: true

      - name: Cache R packages
        uses: actions/cache@v4
        with:
          path: ${{ env.R_LIBS_USER }}
          key: ${{ runner.os }}-r-${{ hashFiles('**/DESCRIPTION') }}
          restore-keys: |
            ${{ runner.os }}-r-

      - name: Install Lake via Elan (Lean 4)
        run: |
          curl https://raw.githubusercontent.com/leanprover/elan/master/elan-init.sh -sSf | sh -s -- -y
          echo "$HOME/.elan/bin" >> $GITHUB_PATH
          elan component add lake

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.22'
          cache: true

      - name: CMake Build (C/C++/Fortran)
        run: |
          cmake -B build -S . -DCMAKE_BUILD_TYPE=Release
          cmake --build build --config Release --parallel $(nproc)

      - name: Cargo Build (Rust)
        run: cargo build --release --workspace --all-targets

      - name: FPM Test (Fortran)
        run: |
          if command -v fpm &> /dev/null; then
            fpm test --profile release
          else
            echo "fpm not found, skipping Fortran tests."
            echo "Install fpm via: curl -fsSL https://fpm.fortran-lang.org/install.sh | bash"
          fi

      - name: Julia Test
        run: |
          julia --project -e 'using Pkg; Pkg.test()'

      - name: Mix Test (Elixir)
        run: |
          mix deps.get
          mix test

      - name: R CMD Check
        uses: r-lib/actions/check-r-package@v2
        with:
          upload-snapshots: true

      - name: Lake Build (Lean 4)
        run: lake build