name: Build firmware

on:
  push:
    branches:
      - "**"
  workflow_dispatch:

env:
  PICO_SDK_REF: 2.2.0
  TINYUSB_REF: 0.20.0
  PICO_SDK_PATH: ${{ github.workspace }}/pico-sdk
  APT_PACKAGES: >-
    cmake
    python3
    build-essential
    gcc-arm-none-eabi
    libnewlib-arm-none-eabi
    libstdc++-arm-none-eabi-newlib
    ninja-build

jobs:
  build:
    name: Build UF2 artifacts
    runs-on: ubuntu-latest

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

      - name: Prepare build dependency cache
        id: apt-cache
        run: |
          mkdir -p "$RUNNER_TEMP/apt-cache/partial"
          . /etc/os-release
          package_hash="$(printf '%s' "$APT_PACKAGES" | sha256sum | cut -d ' ' -f 1)"
          echo "dir=$RUNNER_TEMP/apt-cache" >> "$GITHUB_OUTPUT"
          echo "os=${ID}-${VERSION_ID}" >> "$GITHUB_OUTPUT"
          echo "package-hash=$package_hash" >> "$GITHUB_OUTPUT"

      - name: Cache build dependencies
        uses: actions/cache@v4
        with:
          path: ${{ steps.apt-cache.outputs.dir }}
          key: ${{ runner.os }}-${{ runner.arch }}-apt-${{ steps.apt-cache.outputs.os }}-${{ steps.apt-cache.outputs.package-hash }}
          restore-keys: |
            ${{ runner.os }}-${{ runner.arch }}-apt-${{ steps.apt-cache.outputs.os }}-

      - name: Install build dependencies
        run: |
          sudo apt-get update
          sudo apt-get -o Dir::Cache::archives="${{ steps.apt-cache.outputs.dir }}" install --download-only -y $APT_PACKAGES
          sudo apt-get -o Dir::Cache::archives="${{ steps.apt-cache.outputs.dir }}" install -y $APT_PACKAGES
          sudo chmod -R a+rX "${{ steps.apt-cache.outputs.dir }}"

      - name: Cache Pico SDK
        id: cache-pico-sdk
        uses: actions/cache@v4
        with:
          path: ${{ env.PICO_SDK_PATH }}
          key: ${{ runner.os }}-${{ runner.arch }}-pico-sdk-${{ env.PICO_SDK_REF }}-tinyusb-${{ env.TINYUSB_REF }}

      - name: Download Pico SDK
        if: steps.cache-pico-sdk.outputs.cache-hit != 'true'
        run: |
          git clone --depth 1 --branch "$PICO_SDK_REF" https://github.com/raspberrypi/pico-sdk.git "$PICO_SDK_PATH"
          git -C "$PICO_SDK_PATH" submodule update --init --recursive

      - name: Switch TinyUSB to configured tag
        run: |
          if ! git -C "$PICO_SDK_PATH/lib/tinyusb" rev-parse -q --verify "refs/tags/$TINYUSB_REF" >/dev/null; then
            git -C "$PICO_SDK_PATH/lib/tinyusb" fetch --depth 1 origin "refs/tags/$TINYUSB_REF:refs/tags/$TINYUSB_REF"
          fi
          git -C "$PICO_SDK_PATH/lib/tinyusb" checkout --detach "$TINYUSB_REF"

      - name: Build standard firmware
        run: |
          cmake -S . -B build/standard -G Ninja \
            -DCMAKE_BUILD_TYPE=Release \
            -DPICO_SDK_PATH="$PICO_SDK_PATH"
          cmake --build build/standard --target ds5-bridge
          mkdir -p artifacts
          cp build/standard/ds5-bridge.uf2 artifacts/ds5-bridge.uf2

      - name: Build Debug firmware
        run: |
          cmake -S . -B build/debug -G Ninja \
            -DCMAKE_BUILD_TYPE=Release \
            -DPICO_SDK_PATH="$PICO_SDK_PATH" \
            -DENABLE_SERIAL=ON
          cmake --build build/dse --target ds5-bridge
          cp build/dse/ds5-bridge.uf2 artifacts/ds5-bridge-dse.uf2

      - name: Upload standard UF2 artifact
        uses: actions/upload-artifact@v7
        with:
          path: artifacts/ds5-bridge.uf2
          archive: false
          if-no-files-found: error

      - name: Upload DSE UF2 artifact
        uses: actions/upload-artifact@v7
        with:
          path: artifacts/ds5-bridge-dse.uf2
          archive: false
          if-no-files-found: error