#!/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_linuxcnc_wasm_rs274ngc_pre_link.XXXXXX")
manifest=${1:-linuxcnc-rs274-wasm-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++20
    -DULAPI
    -ffunction-sections
    -fdata-sections
    -I "$(pwd)/core/src"
    -include wctype.h
    -I "$(pwd)/core/include"
    -I "$(pwd)/core/wasm_shims"
    -I "$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/include"
)

sources=(
    core/wasm_shims/dlfcn.cc
    core/wasm_shims/emc_status_shim.cc
    core/wasm_shims/gettext_shim.cc
    core/wasm_shims/linuxcnc_runtime_shim.cc
    core/wasm_shims/python_c_api_shim.cc
    core/wasm_shims/rtapi_compat.cc
    core/wasm_shims/tooldata/tooldata_mmap_backend.cc
    core/wasm_shims/tooldata/tooldata_runtime_stubs.cc
    core/wasm_shims/pythonplugin/python_plugin.cc
    core/src/canon_event_sink.cpp
    core/src/linuxcnc_canon_bridge.cpp
    core/src/linuxcnc_tooldata_fixture.cpp
    core/src/rtcp_kinematics.cpp
)

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

sources+=(core/wasm_shims/rs274ngc_pre_probe_main.cc)

objects=()
object_index=0
for source in "${sources[@]}"; do
    obj="$build_dir/source_${object_index}.o"
    "$cxx" "${common_flags[@]}" -c "$source" -o "$obj"
    objects+=("$obj")
    object_index=$((object_index + 1))
done

"$cxx" "${objects[@]}" \
    -Wl,--gc-sections \
    -lfmt \
    -o "$build_dir/rs274ngc_pre_probe"

"$build_dir/rs274ngc_pre_probe"

echo "linuxcnc wasm rs274ngc_pre link probe passed"