#!/usr/bin/env bash
set -euo pipefail

cd "$(dirname "$0")"

linuxcnc_root=${LINUXCNC_ROOT:-../linuxcnc}
cxx=${CXX:-g++}
build_dir=$(mktemp -d "${TMPDIR:-/tmp}/cnc_sim_rs274_objects.XXXXXX")
python_includes=$(python3.13-config --includes 2>/dev/null || python3-config --includes)
manifest=${1:-linuxcnc-rs274-source-files.txt}

if [[ ! -f "$manifest" ]]; then
    echo "missing manifest: $manifest" >&2
    exit 1
fi

if [[ ! -d "$linuxcnc_root" ]]; then
    echo "missing LinuxCNC root: $linuxcnc_root" >&2
    exit 1
fi

trap 'rm -rf "$build_dir"' EXIT

common_flags=(
    -std=c++17
    -DULAPI
    -I "$linuxcnc_root/src"
    -I "$linuxcnc_root/src/emc"
    -I "$linuxcnc_root/src/emc/nml_intf"
    -I "$linuxcnc_root/src/emc/rs274ngc"
    -I "$linuxcnc_root/src/emc/motion"
    -I "$linuxcnc_root/src/emc/pythonplugin"
    -I "$linuxcnc_root/include"
)

sources=()
while IFS=: read -r group path note; do
    case "$group" in
        core)
            if [[ ! -f "$linuxcnc_root/$path" ]]; then
                echo "missing manifest file: $path" >&2
                exit 1
            fi
            sources+=("$path")
            ;;
        ""|\#*|binding|tooldata)
            ;;
        *)
            echo "unknown manifest group: $group" >&2
            exit 1
            ;;
    esac
done < "$manifest"

source_index=0
for source in "${sources[@]}"; do
    obj="$build_dir/linuxcnc_${source_index}.o"
    # shellcheck disable=SC2086
    "$cxx" "${common_flags[@]}" $python_includes -c "$linuxcnc_root/$source" -o "$obj"
    source_index=$((source_index + 1))
done

echo "linuxcnc rs274 source object build passed (${#sources[@]} objects)"
echo "built objects in $build_dir"