#!/usr/bin/env bash
# build_deps.sh — кросс-сборка статических armhf-зависимостей в $XARM
# Собирает: FFTW 3.3.10 (single+NEON), libfec (RS для liquid), liquid-dsp 1.8.0,
#           libiio (local backend), libad9361-iio (FIR для rate < 2.083 MSPS)
# Запуск: scripts/build_deps.sh   (один раз, ~15-20 мин на RPi4)
set -euo pipefail
source "$(dirname "$0")/../toolchain.env"

WORK="$HOME/src"
mkdir -p "$WORK" "$XARM"
cd "$WORK"

echo "=== [0/6] Проверка тулчейна ==="
which "${CC}" >/dev/null || {
    echo "Нет ${CC}. Установи: sudo apt install gcc-arm-linux-gnueabihf"; exit 1; }
sudo apt-get install -y build-essential autoconf automake libtool git wget cmake >/dev/null

echo "=== [1/6] FFTW 3.3.10 (float + NEON, static) ==="
if [ ! -f "$XARM/lib/libfftw3f.a" ]; then
    [ -d fftw-3.3.10 ] || {
        wget -nc http://fftw.org/fftw-3.3.10.tar.gz
        tar xf fftw-3.3.10.tar.gz
    }
    cd fftw-3.3.10
    ./configure --host=arm-linux-gnueabihf --prefix="$XARM" \
        --enable-single --enable-neon --enable-static --disable-shared \
        CC="$CC" CFLAGS="$XCFLAGS"
    make -j"$(nproc)" && make install
    cd "$WORK"
else
    echo "уже собран, пропускаю"
fi

echo "=== [2/6] libfec (Reed-Solomon для liquid RS(255,223)) ==="
if [ ! -f "$XARM/lib/libfec.a" ]; then
    [ -d libfec ] || git clone --depth 1 https://github.com/jgaeddert/libfec.git
    cd libfec
    [ -x ./configure ] || ./bootstrap.sh || autoreconf -i

    # config.guess/config.sub 2007 года не знают aarch64 — берём свежие из системы
    for f in config.guess config.sub; do
        cp -f "/usr/share/automake-1.16/$f" "$f" 2>/dev/null || \
        cp -f "/usr/share/misc/$f" "$f" 2>/dev/null || true
    done

    ./configure --build="$(gcc -dumpmachine)" --host=arm-linux-gnueabihf \
        --prefix="$XARM" CC="$CC" CFLAGS="$XCFLAGS"
    make -j"$(nproc)" && make install
    cd "$WORK"
else
    echo "уже собран, пропускаю"
fi

echo "=== [3/6] liquid-dsp 1.8.0 (static, с FFTW+libfec) ==="
if [ ! -f "$XARM/lib/libliquid.a" ]; then
    [ -d liquid-dsp ] || git clone --depth 1 --branch v1.8.0 \
        https://github.com/jgaeddert/liquid-dsp.git
    cd liquid-dsp
    ./bootstrap.sh
    [ -f makefile ] && make clean || true
    ./configure --host=arm-linux-gnueabihf --prefix="$XARM" \
        CC="$CC" CFLAGS="$XCFLAGS -ffast-math" \
        CPPFLAGS="-I$XARM/include" LDFLAGS="-L$XARM/lib" \
        ac_cv_func_malloc_0_nonnull=yes ac_cv_func_realloc_0_nonnull=yes
    
    grep -q "HAVE_LIBFFTW3F 1" config.log || {
        echo "ОШИБКА: liquid не нашёл кросс-FFTW — проверь \$XARM"; exit 1; }
    grep -q "HAVE_LIBFEC 1" config.log || {
        echo "ОШИБКА: liquid не нашёл libfec — RS будет недоступен"; exit 1; }
    make -j"$(nproc)" && make install
    cd "$WORK"
else
    echo "уже собран, пропускаю (rm \$XARM/lib/libliquid.a чтобы пересобрать с libfec)"
fi

echo "=== [4/6] libiio v0.25 (static, только local backend) ==="
if [ ! -f "$XARM/lib/libiio.a" ]; then
    [ -d libiio ] || git clone --depth 1 --branch v0.25 \
        https://github.com/analogdevicesinc/libiio.git
    cd libiio

    sed -i '/find_package(Threads/c\set(Threads_FOUND ON)\nset(CMAKE_THREAD_LIBS_INIT "-lpthread")\nset(CMAKE_HAVE_PTHREADS_CREATE ON)\nadd_library(Threads::Threads INTERFACE IMPORTED)\nset_property(TARGET Threads::Threads PROPERTY INTERFACE_LINK_LIBRARIES "-lpthread")' CMakeLists.txt

    cat > toolchain-armhf.cmake <<EOF
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_C_COMPILER ${CROSS}gcc)
set(CMAKE_C_FLAGS_INIT "$XCFLAGS")
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
EOF
    cmake -B build-armhf -DCMAKE_TOOLCHAIN_FILE=toolchain-armhf.cmake \
        -DCMAKE_INSTALL_PREFIX="$XARM" -DCMAKE_BUILD_TYPE=Release \
        -DBUILD_SHARED_LIBS=OFF \
        -DWITH_LOCAL_BACKEND=ON -DWITH_NETWORK_BACKEND=OFF \
        -DWITH_USB_BACKEND=OFF -DWITH_SERIAL_BACKEND=OFF \
        -DWITH_XML_BACKEND=OFF -DHAVE_DNS_SD=OFF \
        -DWITH_TESTS=OFF -DWITH_EXAMPLES=OFF -DWITH_DOC=OFF \
        -DCSHARP_BINDINGS=OFF -DPYTHON_BINDINGS=OFF \
        -DWITH_IIOD=OFF -DWITH_LOCAL_CONFIG=OFF -DWITH_ZSTD=OFF \
        -DTHREADS_PREFER_PTHREAD_FLAG=ON
    cmake --build build-armhf -j"$(nproc)"
    cmake --install build-armhf
    cd "$WORK"
else
    echo "уже собран, пропускаю"
fi

echo "=== [5/6] libad9361-iio (static, FIR для sample rate < 2.083 MSPS) ==="
if [ ! -f "$XARM/lib/libad9361.a" ]; then
    [ -d libad9361-iio ] || git clone --depth 1 \
        https://github.com/analogdevicesinc/libad9361-iio.git
    cd libad9361-iio

    # Хак для потоков
    sed -i '/find_package(Threads/c\set(Threads_FOUND ON)\nset(CMAKE_THREAD_LIBS_INIT "-lpthread")\nset(CMAKE_HAVE_PTHREADS_CREATE ON)\nadd_library(Threads::Threads INTERFACE IMPORTED)\nset_property(TARGET Threads::Threads PROPERTY INTERFACE_LINK_LIBRARIES "-lpthread")' CMakeLists.txt || true
    
    # ХАК: Вырезаем тесты, которые валятся на линковке в GCC 14
    sed -i 's|add_subdirectory(test)|#&|' CMakeLists.txt || true

    cat > toolchain-armhf.cmake <<EOF
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_C_COMPILER ${CROSS}gcc)
set(CMAKE_C_FLAGS_INIT "$XCFLAGS")
set(CMAKE_FIND_ROOT_PATH $XARM)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
EOF
    # Убран нерабочий -DCMAKE_EXE_LINKER_FLAGS="-lm"
    cmake -B build-armhf -DCMAKE_TOOLCHAIN_FILE=toolchain-armhf.cmake \
        -DCMAKE_INSTALL_PREFIX="$XARM" -DCMAKE_BUILD_TYPE=Release \
        -DBUILD_SHARED_LIBS=OFF -DCMAKE_PREFIX_PATH="$XARM"
    cmake --build build-armhf -j"$(nproc)"
    cmake --install build-armhf
    cd "$WORK"
else
    echo "уже собран, пропускаю"
fi

echo "=== [6/6] Итог ==="
ls -la "$XARM/lib/" | grep -E "libfftw3f|libfec|libliquid|libiio|libad9361" || true
echo "Готово. Дальше: make check-env && make"