#!/usr/bin/env bash
#
# build.sh - Compile the Neuron soul-binary.
#
# Pipeline:
#   1. elb resolves the import graph from soul.el and runs `elc <module>` per
#      module, emitting one .c file per .el into dist/.
#   2. cc links all dist/*.c plus el_runtime.c into a single native binary
#      (dist/neuron). elb's own link step does not pass -I for the runtime
#      headers, so we run cc ourselves.
#   3. Refresh dist/soul-el so the launchctl plist (which execs dist/soul ->
#      dist/soul-el -> dist/neuron) picks up the new binary.
#
# Usage:
#   ./build.sh                  - build dist/neuron and refresh dist/soul-el
#   ./build.sh --kickstart      - also kickstart the launchctl service
#
# Environment overrides:
#   EL_HOME   - path to foundation/el (default: ../foundation/el)

set -euo pipefail

cd "$(dirname "$0")"
NEURON_DIR=$(pwd)
EL_HOME="${EL_HOME:-${NEURON_DIR}/../foundation/el}"
ELB="${EL_HOME}/dist/platform/elb"
ELC="${EL_HOME}/dist/platform/elc"
RUNTIME_DIR="${EL_HOME}/el-compiler/runtime"

if [ ! -x "${ELB}" ] || [ ! -x "${ELC}" ]; then
    echo "elb/elc not found in ${EL_HOME}/dist/platform" >&2
    exit 1
fi
if [ ! -f "${RUNTIME_DIR}/el_runtime.c" ]; then
    echo "runtime not found at ${RUNTIME_DIR}" >&2
    exit 1
fi

mkdir -p dist
rm -f dist/*.c dist/*.elh

echo "==> elb compile (manifest entry: soul.el)"
PATH="${EL_HOME}/dist/platform:${PATH}" "${ELB}" --runtime="${RUNTIME_DIR}" \
    > /tmp/neuron-elb.log 2>&1 || true

# elb's link step lacks -I for the runtime headers, so we always re-link
# manually below regardless of what elb reported.

OUT="dist/neuron"
echo "==> cc link -> ${OUT}"
cc -O2 -I "${RUNTIME_DIR}" \
    -o "${OUT}" \
    dist/*.c \
    "${RUNTIME_DIR}/el_runtime.c" \
    -lcurl -lpthread

echo "==> refresh dist/soul-el -> dist/neuron"
( cd dist && ln -sf neuron soul-el )

echo "==> built $(stat -f '%z' ${OUT}) bytes -> ${OUT}"

if [ "${1:-}" = "--kickstart" ]; then
    echo "==> launchctl kickstart soul"
    launchctl kickstart -k "gui/$(id -u)/ai.neurontechnologies.soul"
fi