name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build:
    name: Build firmware
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Install toolchain
        run: |
          sudo apt-get update -q
          sudo apt-get install -y --no-install-recommends \
            gcc-arm-none-eabi binutils-arm-none-eabi libnewlib-arm-none-eabi \
            cmake ninja-build

      - name: Compile firmware
        run: cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=MinSizeRel . && ninja -C build

      - name: Memory summary
        run: |
          echo '## Memory usage' >> "$GITHUB_STEP_SUMMARY"
          echo '' >> "$GITHUB_STEP_SUMMARY"
          echo '```' >> "$GITHUB_STEP_SUMMARY"
          arm-none-eabi-size -A build/firmware \
            | grep -E '^\.(text|data|bss|rodata|ARM)' \
            >> "$GITHUB_STEP_SUMMARY"
          echo '' >> "$GITHUB_STEP_SUMMARY"
          arm-none-eabi-size build/firmware | tail -1 >> "$GITHUB_STEP_SUMMARY"
          echo '```' >> "$GITHUB_STEP_SUMMARY"

      - name: Upload firmware artifacts
        uses: actions/upload-artifact@v4
        with:
          name: firmware-${{ github.sha }}
          path: |
            build/firmware.hex
            build/firmware.map
          if-no-files-found: error

  format:
    name: Check formatting
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install clang-format
        run: |
          sudo apt-get update -q
          sudo apt-get install -y --no-install-recommends clang-format

      - name: clang-format check
        run: |
          find src include -name '*.c' -o -name '*.h' | \
            xargs clang-format --dry-run --Werror --style=file:.clang-format

  lint:
    name: Static analysis
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install cppcheck
        run: |
          sudo apt-get update -q
          sudo apt-get install -y --no-install-recommends cppcheck

      - name: cppcheck
        run: |
          cppcheck --error-exitcode=1 \
                   --enable=warning,style,performance,portability \
                   --suppress=missingInclude \
                   --inline-suppr \
                   --std=c11 \
                   -I include \
                   src/

  docs:
    name: Build documentation
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install Doxygen
        run: |
          sudo apt-get update -q
          sudo apt-get install -y --no-install-recommends doxygen

      - name: Doxygen
        run: |
          doxygen Doxyfile 2>&1 | tee /tmp/doxy.log
          ! grep -q 'warning:' /tmp/doxy.log

      - name: Deploy to gh-pages
        if: github.ref == 'refs/heads/main'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          cd docs/html
          git init -b gh-pages
          git config user.name "ci"
          git config user.email "ci@localhost"
          git add -A
          git commit -m "docs: ${GITHUB_SHA}"
          SERVER="${GITHUB_SERVER_URL#https://}"
          git push --force \
            "https://x-token:${GITHUB_TOKEN}@${SERVER}/${GITHUB_REPOSITORY}.git" \
            HEAD:gh-pages