# variables
image     := "ptt-builder"
build_dir := "build"

# podman takes priority over docker
engine := `command -v podman 2>/dev/null \
           || command -v docker 2>/dev/null \
           || { echo "error: podman or docker required" >&2; exit 1; }`

# user-namespace mapping: podman rootless vs docker
user_ns := `command -v podman >/dev/null 2>&1 \
            && echo "--userns=keep-id" \
            || echo "--user $(id -u):$(id -g)"`

src_files := "find /src/src /src/include -name '*.c' -o -name '*.h'"

# recipes
# build container image (only rebuilt when Dockerfile changes)
image-build:
    {{engine}} build -t {{image}} .

# compile firmware inside the container
build: image-build
    {{engine}} run --rm \
        {{user_ns}} \
        -v "{{justfile_directory()}}:/src:z" \
        {{image}} \
        sh -c "cmake -B /src/{{build_dir}} -G Ninja \
                     -DCMAKE_BUILD_TYPE=MinSizeRel /src \
               && ninja -C /src/{{build_dir}}"

# reformat all source files in-place with clang-format
format: image-build
    {{engine}} run --rm \
        {{user_ns}} \
        -v "{{justfile_directory()}}:/src:z" \
        {{image}} \
        sh -c "{{src_files}} | xargs clang-format -i --style=file:/src/.clang-format"

# check formatting without modifying files (used in CI)
format-check: image-build
    {{engine}} run --rm \
        {{user_ns}} \
        -v "{{justfile_directory()}}:/src:z" \
        {{image}} \
        sh -c "{{src_files}} | xargs clang-format --dry-run --Werror --style=file:/src/.clang-format"

# static analysis with cppcheck
lint: image-build
    {{engine}} run --rm \
        {{user_ns}} \
        -v "{{justfile_directory()}}:/src:z" \
        {{image}} \
        sh -c "cppcheck --error-exitcode=1 \
                        --enable=warning,style,performance,portability \
                        --suppress=missingInclude \
                        --inline-suppr \
                        --std=c11 \
                        -I /src/include \
                        /src/src/"

# generate HTML documentation with Doxygen
docs: image-build
    {{engine}} run --rm \
        {{user_ns}} \
        -v "{{justfile_directory()}}:/src:z" \
        {{image}} \
        sh -c "cd /src && doxygen Doxyfile"

# flash firmware via pyocd on the host (requires USB / DAPLink)
flash: build
    pyocd flash --target nrf52840 {{build_dir}}/firmware.hex

# start GDB server for debugging
gdbserver:
    pyocd gdbserver --target nrf52840 --port 3333

# remove build artifacts and generated docs
clean:
    rm -rf {{build_dir}} docs

# remove build artifacts, docs AND the container image
clean-all: clean
    {{engine}} rmi {{image}} 2>/dev/null || true