#!/bin/bash
# Phase 3: build a core reactor plus one generated-shape PIC side module.
# Runs on k-uce; artifacts go under /tmp/uce/wasm-phase3.
set -e
cd "$(dirname "$0")"

SDK=/opt/wasi-sdk
ROOT=$(cd ../.. && pwd)
OUT=/tmp/uce/wasm-phase3
SHIM="$OUT/shim"
mkdir -p "$OUT" "$SHIM"

cat > "$SHIM/uce_lib.h" <<'EOF'
#pragma once
#include "types.h"
String html_escape(String s);
EOF
cp "$ROOT/src/lib/types.h" "$SHIM/types.h"
python3 - <<'PY'
from pathlib import Path
p = Path('/tmp/uce/wasm-phase3/shim/types.h')
s = p.read_text()
start = s.index('void * operator new(decltype(sizeof(0)) n) noexcept(false)')
end = s.index('void operator delete(void * p) throw()')
end = s.index('\n}', end) + 3
replacement = '''// WASM side-module shim: allocator is owned by the core module.\nvoid * operator new(decltype(sizeof(0)) n) noexcept(false);\nvoid operator delete(void * p) throw();\nvoid operator delete(void * p, decltype(sizeof(0)) n) noexcept;\n'''
p.write_text(s[:start] + replacement + s[end:])
PY
cat > "$SHIM/signal.h" <<'EOF'
#pragma once
typedef int sig_atomic_t;
typedef void (*sighandler_t)(int);
#define SIGTERM 15
int raise(int);
sighandler_t signal(int, sighandler_t);
EOF

"$SDK/bin/clang++" --target=wasm32-wasip1 -mexec-model=reactor \
	-O1 -fno-exceptions \
	-I../.. -I../../src/lib \
	core.cpp -o "$OUT/core.wasm" \
	-Wl,--export-all \
	-Wl,--import-table \
	-Wl,--export=__stack_pointer \
	-Wl,--export=__heap_base \
	-Wl,--allow-undefined-file=hostcalls.syms \
	-Wl,--undefined=_ZTVN10__cxxabiv117__class_type_infoE

"$SDK/bin/clang++" --target=wasm32-wasip1 -fPIC -fvisibility=default \
	-fvisibility-inlines-hidden \
	-O1 -fno-exceptions \
	-I"$SHIM" -I"$ROOT/src/lib" \
	-c generated/page.uce.cpp -o "$OUT/page.o"

"$SDK/bin/clang++" --target=wasm32-wasip1 -fPIC -fvisibility=default \
	-fvisibility-inlines-hidden \
	-O1 -fno-exceptions \
	-I"$SHIM" -I"$ROOT/src/lib" \
	-c generated/helper.cpp -o "$OUT/helper.o"

"$SDK/bin/wasm-ld" -shared --experimental-pic \
	--unresolved-symbols=import-dynamic \
	"$OUT/page.o" "$OUT/helper.o" -o "$OUT/page.wasm" \
	--export=__uce_set_current_request \
	--export=__uce_render

echo "--- phase3 core.wasm ---"
ls -la "$OUT/core.wasm"
echo "--- phase3 page.wasm ---"
ls -la "$OUT/page.wasm"