name: WASM Compilation

on:
  workflow_call:

jobs:
  wasm:
    name: wasm (${{ matrix.arch }})
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        arch: [wasm32, wasm32-relaxed-simd]
    defaults:
      run:
        working-directory: src
        shell: bash
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          fetch-depth: 0
          persist-credentials: false

      - name: Install emsdk
        working-directory: .
        run: |
          git clone --depth 1 https://github.com/emscripten-core/emsdk.git
          cd emsdk
          ./emsdk install latest
          ./emsdk activate latest

      - name: Extract the bench number from the commit history
        run: |
          for hash in $(git rev-list -100 HEAD); do
            benchref=$(git show -s $hash | tac | grep -m 1 -o -x '[[:space:]]*\b[Bb]ench[ :]\+[1-9][0-9]\{5,7\}\b[[:space:]]*' | sed 's/[^0-9]//g') && break || true
          done
          [[ -n "$benchref" ]] && echo "benchref=$benchref" >> $GITHUB_ENV && echo "From commit: $hash" && echo "Reference bench: $benchref" || echo "No bench found"

      - name: Download the used network from the fishtest framework
        run: make net

      - name: Build ${{ matrix.arch }} build
        run: |
          source $GITHUB_WORKSPACE/emsdk/emsdk_env.sh
          em++ --version
          net=$(grep -oE 'nn-[0-9a-f]+\.nnue' evaluate.h | head -1)
          make clean
          COMPCXX=em++ make -j build ARCH=${{ matrix.arch }} EXTRALDFLAGS="--preload-file $net"

      - name: Verify bench under node
        run: EXE=./stockfish.js RUN_PREFIX=node ../tests/signature.sh $benchref