#!/bin/sh
# Build script for uTun on FreeBSD (full rebuild)
# Usage: ./build_bsd_full.sh [options]
# Options:
#   -h, --help      Show this help
#   --asan          Build with AddressSanitizer (clang)
#   --hardened      Build with compiler security hardening flags (clang)
#   -j[N]           Build with N parallel jobs (default: sysctl hw.ncpu)

set -e

# Parse arguments
USE_ASAN=0
USE_HARDENED=0
JOBS=""
MAKE_ARGS=""

while [ $# -gt 0 ]; do
    case "$1" in
        -h|--help)
            echo "Usage: ./build_bsd_full.sh [options]"
            echo "Options:"
            echo "  -h, --help      Show this help"
            echo "  --asan          Build with AddressSanitizer"
            echo "  --hardened      Build with compiler security hardening flags"
            echo "  -j[N]           Build with N parallel jobs (default: sysctl hw.ncpu)"
            exit 0
            ;;
        --asan)
            USE_ASAN=1
            shift
            ;;
        --hardened)
            USE_HARDENED=1
            shift
            ;;
        -j*)
            JOBS="$1"
            shift
            ;;
        *)
            MAKE_ARGS="$MAKE_ARGS $1"
            shift
            ;;
    esac
done

if [ -z "$JOBS" ]; then
    if command -v nproc >/dev/null 2>&1; then
        JOBS="-j$(nproc)"
    else
        JOBS="-j$(sysctl -n hw.ncpu)"
    fi
fi

# Проверка и установка зависимостей
need_install=""

for cmd in autoreconf aclocal automake libtoolize; do
    if ! command -v "$cmd" >/dev/null 2>&1; then
        need_install=1
        break
    fi
done

if [ -n "$need_install" ]; then
    echo "Устанавливаются необходимые пакеты (нужен root)..."
    pkg update
    pkg install -y autoconf automake libtool pkgconf openssl
fi

# Предпочитаем GNU make (gmake), но fallback на bmake — он собирает
# autotools-генерённые Makefile данного проекта. gmake ставится отдельно:
#   pkg install gmake   (нужен root)
GMAKE="$(command -v gmake || command -v make)"
echo "Используем make: $GMAKE"

mkdir -p m4

echo "=== Полная пересборка uTun ==="

# 1. Очистка
echo "[1/4] Очистка..."
$GMAKE distclean 2>/dev/null || true
rm -f config.h config.status config.log
rm -f configure.log autoreconf.log build.log

# 2. Генерация configure
echo "[2/4] Автогенерация..."
autoreconf -fi 2>&1 | tee autoreconf.log

# Проверяем, появился ли configure
if [ ! -f configure ]; then
    echo "Ошибка: autoreconf не создал configure."
    exit 1
fi

chmod +x configure

# 3. Конфигурация
echo "[3/4] Конфигурация..."

# FFmpeg (опционально) — автоопределение через pkg-config
FFMPEG_OPT=""
if command -v pkg-config >/dev/null 2>&1 && \
   pkg-config --exists libavformat libavcodec libavutil libswscale libswresample 2>/dev/null; then
    FFMPEG_OPT="--with-ffmpeg"
    echo "FFmpeg detected — building with video transcoding"
else
    echo "FFmpeg not found — building without video transcoding"
fi

if [ "$USE_ASAN" -eq 1 ]; then
    echo "(AddressSanitizer enabled — clang, lib/ + src/ only)"
    ./configure --prefix=/usr/local CC=clang \
        CFLAGS="-g -O1 -fsanitize=address -fno-omit-frame-pointer" \
        LDFLAGS="-fsanitize=address" $FFMPEG_OPT 2>&1 | tee configure.log
elif [ "$USE_HARDENED" -eq 1 ]; then
    echo "(Hardening enabled — clang-safe flags)"
    ./configure --prefix=/usr/local CC=clang \
        CFLAGS="-D_FORTIFY_SOURCE=2 -fstack-protector-strong -fPIE" \
        LDFLAGS="-Wl,-z,relro -Wl,-z,now -pie" $FFMPEG_OPT 2>&1 | tee configure.log
else
    ./configure --prefix=/usr/local $FFMPEG_OPT 2>&1 | tee configure.log
fi

# 4. Сборка
echo "[4/4] Сборка..."
if [ "$USE_ASAN" -eq 1 ]; then
    (cd lib && $GMAKE $JOBS $MAKE_ARGS 2>&1 | tee ../build.log)
    (cd lib/libopus && $GMAKE $JOBS $MAKE_ARGS 2>&1 | tee ../../build.log)
    (cd src && $GMAKE $JOBS $MAKE_ARGS 2>&1 | tee ../build.log)
else
    $GMAKE $JOBS $MAKE_ARGS 2>&1 | tee build.log
fi

echo
echo "=== Готово ==="
echo "Бинарный файл: src/utun"
if [ "$USE_ASAN" -eq 1 ]; then
    echo
    echo "Запуск с ASAN (detect_leaks=0 обязателен на FreeBSD):"
    echo "  ASAN_OPTIONS=detect_leaks=0:halt_on_error=0 ./src/utun -f -p /tmp/utun.pid -l /tmp/utun.log"
fi