name: Build Solo Sim (WASM)

# Builds the companion_radio browser sim (real firmware compiled to WASM via
# Emscripten, see variants/sim/) and attaches it to the same draft release
# build-solo-firmwares.yml creates for this tag, as a single fixed-name
# asset: solo-sim-wasm.zip. Fixed name (no version in it) so
# meshcore-solo-site's server-side deploy script can always fetch it from
# the stable "latest release" download URL without knowing the tag --
# see meshcore-solo-site/scripts/fetch-wasm-release.sh.
#
# Independent job/workflow from the hardware firmware builds: different
# toolchain (Emscripten, not PlatformIO), and a WASM build failure shouldn't
# block or delay the actual firmware release.

permissions:
  contents: write

on:
  workflow_dispatch:
  push:
    tags:
      - 'v*'

jobs:
  build-sim-wasm:
    runs-on: ubuntu-latest
    steps:
      - name: Clone Repo
        uses: actions/checkout@v4

      - name: Cache emsdk
        uses: actions/cache@v4
        with:
          path: variants/sim/tools/emsdk
          key: emsdk-6.0.9-${{ runner.os }}

      - name: Install emsdk 6.0.9
        run: |
          if [ ! -x variants/sim/tools/emsdk/upstream/emscripten/em++ ]; then
            rm -rf variants/sim/tools/emsdk
            git clone --depth 1 https://github.com/emscripten-core/emsdk.git variants/sim/tools/emsdk
            cd variants/sim/tools/emsdk
            python3 ./emsdk.py install 6.0.9
            python3 ./emsdk.py activate 6.0.9
          else
            echo "emsdk 6.0.9 already cached"
          fi

      - name: Build companion WASM
        run: variants/sim/build_wasm.sh

      - name: Build repeater WASM
        run: variants/sim/build_wasm_repeater.sh

      - name: Package
        run: |
          mkdir -p out/wasm/companion out/wasm/repeater
          cp variants/sim/web/build/meshcore_sim.js variants/sim/web/build/meshcore_sim.wasm out/wasm/companion/
          cp variants/sim/web/build/repeater/meshcore_sim_repeater.js variants/sim/web/build/repeater/meshcore_sim_repeater.wasm out/wasm/repeater/
          cd out && zip -r solo-sim-wasm.zip wasm

      - name: Attach to release
        if: startsWith(github.ref, 'refs/tags/')
        uses: softprops/action-gh-release@v2
        with:
          draft: true
          files: out/solo-sim-wasm.zip