name: Build

on:
  push:
    branches:
      - main
    tags:
      - '[0-9]*.[0-9]*.[0-9]*'
  # PRs get the same gate -- without this the checks only ran after merge.
  pull_request:
  pull_request_review:
    types:
      - submitted

jobs:
  compile:
    if: github.event_name != 'pull_request_review' || github.event.review.state == 'approved'
    runs-on: ubuntu-latest

    steps:
      - name: Check out repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.event.pull_request.head.sha || github.sha }}

      - name: Set up Arduino CLI
        uses: arduino/setup-arduino-cli@v2

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.x'

      - name: Install adafruit-nrfutil
        # The Adafruit nRF52 build recipe shells out to adafruit-nrfutil to
        # package the DFU .zip; it is not bundled with the core on the runner.
        run: pip install adafruit-nrfutil

      - name: Install Adafruit nRF52 core
        run: |
          arduino-cli config init --overwrite
          arduino-cli config set board_manager.additional_urls https://adafruit.github.io/arduino-board-index/package_adafruit_index.json
          arduino-cli core update-index
          arduino-cli core install adafruit:nrf52

      - name: Resolve build version
        id: build_version
        run: |
          set -eu
          SEMVER_RE='^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)$'
          BASE_VERSION="$(
            git tag --list \
              | grep -E "$SEMVER_RE" \
              | sort -V \
              | tail -n1 || true
          )"
          if [ -z "$BASE_VERSION" ]; then
            BASE_VERSION="0.9.1"
          fi

          if [ "${{ github.event_name }}" = "pull_request" ] || [ "${{ github.event_name }}" = "pull_request_review" ]; then
            PR_NUMBER="${{ github.event.pull_request.number }}"
            SHORT_SHA="$(git rev-parse --short=8 "${GITHUB_SHA}")"
            VERSION="${BASE_VERSION}-pr${PR_NUMBER}+${SHORT_SHA}"
          else
            VERSION="${BASE_VERSION}"
          fi

          echo "version=$VERSION" >> "$GITHUB_OUTPUT"

      - name: Generate version header
        env:
          OPK_BUILD_VERSION: ${{ steps.build_version.outputs.version }}
        run: ./gen_version.sh

      - name: Compile OpenPuck
        run: |
          mkdir -p build/openpuck build/cache/openpuck
          arduino-cli compile \
            -b adafruit:nrf52:feather52840 \
            --clean \
            --build-path build/cache/openpuck \
            --output-dir build/openpuck \
            --build-property "build.extra_flags=-DNRF52840_XXAA {build.flags.usb} -DCFG_TUD_HID=4 -DCFG_TUD_TASK_QUEUE_SZ=64 -DCFG_TUD_VENDOR_TX_BUFSIZE=256" \
            OpenPuck

      - name: Generate UF2 (OpenPuck)
        # The Adafruit nRF52 core leaves its UF2 objcopy recipe commented out in
        # platform.txt, so arduino-cli only emits .hex/.zip. Convert the .hex to
        # a drag-and-drop .uf2 ourselves.
        run: ./gen_uf2.sh build/openpuck/OpenPuck.ino.hex build/openpuck/OpenPuck.ino.uf2

      - name: Compile ReversePuckFirmware
        run: |
          mkdir -p build/reversepuck build/cache/reversepuck
          arduino-cli compile \
            -b adafruit:nrf52:feather52840 \
            --clean \
            --build-path build/cache/reversepuck \
            --output-dir build/reversepuck \
            --build-property "build.extra_flags=-DNRF52840_XXAA {build.flags.usb}" \
            ReversePuckFirmware

      - name: Generate UF2 (ReversePuckFirmware)
        run: ./gen_uf2.sh build/reversepuck/ReversePuckFirmware.ino.hex build/reversepuck/ReversePuckFirmware.ino.uf2

      - name: List build outputs
        run: |
          find build/openpuck build/reversepuck -maxdepth 1 -type f -print | sort

      - name: Upload build artifacts
        uses: actions/upload-artifact@v4
        with:
          name: openpuck-firmware
          retention-days: 7
          path: |
            build/openpuck/*.uf2
            build/openpuck/*.bin
            build/openpuck/*.hex
            build/openpuck/*.elf
            build/openpuck/*.map
            build/openpuck/*.zip
            build/reversepuck/*.uf2
            build/reversepuck/*.bin
            build/reversepuck/*.hex
            build/reversepuck/*.elf
            build/reversepuck/*.map
            build/reversepuck/*.zip