#!/usr/bin/env bash
# Build the OCaml SX engine for browser use (WASM + JS fallback).
#
# Outputs:
#   _build/default/browser/sx_browser.bc.wasm.js       WASM loader
#   _build/default/browser/sx_browser.bc.wasm.assets/   WASM modules
#   _build/default/browser/sx_browser.bc.js             JS fallback
#
# Usage:
#   cd hosts/ocaml && ./browser/build.sh

set -euo pipefail
cd "$(dirname "$0")/.."

eval $(opam env 2>/dev/null || true)

echo "=== Building OCaml SX browser engine ==="

# Build all targets: bytecode, JS, WASM
dune build browser/sx_browser.bc.js browser/sx_browser.bc.wasm.js

echo ""
echo "--- Output sizes ---"
echo -n "JS (unoptimized):  "; ls -lh _build/default/browser/sx_browser.bc.js | awk '{print $5}'
echo -n "WASM loader:       "; ls -lh _build/default/browser/sx_browser.bc.wasm.js | awk '{print $5}'
echo -n "WASM modules:      "; du -sh _build/default/browser/sx_browser.bc.wasm.assets/*.wasm | awk '{s+=$1}END{print s"K"}'

# Optimized JS build
js_of_ocaml --opt=3 -o _build/default/browser/sx_browser.opt.js _build/default/browser/sx_browser.bc
echo -n "JS (optimized):    "; ls -lh _build/default/browser/sx_browser.opt.js | awk '{print $5}'

echo ""
echo "=== Build complete ==="
echo ""
echo "Test with:"
echo "  node hosts/ocaml/browser/run_tests_js.js                                    # JS"
echo "  node --experimental-wasm-imported-strings hosts/ocaml/browser/run_tests_wasm.js  # WASM"