add_third_party(
  lua
  GIT_REPOSITORY https://github.com/dragonflydb/lua
  GIT_TAG Dragonfly-5.4.6a
  CONFIGURE_COMMAND echo
  BUILD_IN_SOURCE 1
  BUILD_COMMAND ${DFLY_TOOLS_MAKE} all
  INSTALL_COMMAND cp <SOURCE_DIR>/liblua.a ${THIRD_PARTY_LIB_DIR}/lua/lib/
  COMMAND cp <SOURCE_DIR>/lualib.h <SOURCE_DIR>/lua.h <SOURCE_DIR>/lauxlib.h
          <SOURCE_DIR>/luaconf.h ${THIRD_PARTY_LIB_DIR}/lua/include
)


# Header-only, so we only fetch the headers.
add_third_party(
  dragonbox
  URL https://github.com/jk-jeon/dragonbox/archive/beeeef91cf6fef89a4d4ba5e95d47ca64ccb3a44.tar.gz
  CONFIGURE_COMMAND echo skip
  BUILD_COMMAND echo skip
  INSTALL_COMMAND cp -r <SOURCE_DIR>/include/dragonbox ${THIRD_PARTY_LIB_DIR}/dragonbox/include/
  LIB "none"
)

add_third_party(
  reflex
  URL https://github.com/Genivia/RE-flex/archive/refs/tags/v6.5.0.tar.gz
  PATCH_COMMAND autoreconf -fi
  CONFIGURE_COMMAND <SOURCE_DIR>/configure --disable-avx2 --prefix=${THIRD_PARTY_LIB_DIR}/reflex
          CXX=${CMAKE_CXX_COMPILER} CC=${CMAKE_C_COMPILER}
)

set(REFLEX "${THIRD_PARTY_LIB_DIR}/reflex/bin/reflex")
ExternalProject_Add_Step(reflex_project reflex_executable
  DEPENDEES install
  COMMAND ${CMAKE_COMMAND} -E true
  BYPRODUCTS ${REFLEX}
)
ExternalProject_Add_StepTargets(reflex_project reflex_executable)

add_third_party(
  jsoncons
  GIT_REPOSITORY https://github.com/dragonflydb/jsoncons
  GIT_TAG Dragonfly1.5.0
  GIT_SHALLOW 1
  CMAKE_PASS_FLAGS "-DJSONCONS_BUILD_TESTS=OFF -DJSONCONS_HAS_POLYMORPHIC_ALLOCATOR=ON"
  LIB "none"
)

add_third_party(
  lz4
  URL https://github.com/lz4/lz4/archive/refs/tags/v1.10.0.tar.gz

  BUILD_IN_SOURCE 1
  CONFIGURE_COMMAND echo skip
  BUILD_COMMAND ${DFLY_TOOLS_MAKE} lib-release
  INSTALL_COMMAND ${DFLY_TOOLS_MAKE} install BUILD_SHARED=no PREFIX=${THIRD_PARTY_LIB_DIR}/lz4
)

# MiMalloc is built with a raw ExternalProject_Add rather than add_third_party:
# its build needs custom patches, bespoke -DMI_* CMAKE_ARGS, non-standard output dirs, extra header copying, and a
# hand-declared imported target - none of which fit add_third_party's conventional layout. It still downloads a URL
# tarball, so it reuses the shared retry policy (see third_party.cmake) via DOWNLOAD_COMMAND (see below).
set(MIMALLOC_ROOT_DIR ${THIRD_PARTY_LIB_DIR}/mimalloc2)
set(MIMALLOC_INCLUDE_DIR ${MIMALLOC_ROOT_DIR}/include)
set(MIMALLOC_PATCH_DIR ${CMAKE_CURRENT_LIST_DIR}/../patches/mimalloc-v2.5.2)
set(MIMALLOC_C_FLAGS "-O3 -g -DMI_STAT=0 -DNDEBUG")
set(MIMALLOC_URL https://github.com/microsoft/mimalloc/archive/refs/tags/v2.5.2.tar.gz)
set(MIMALLOC_SHA256 5cf9d2a10fae5551b764e888a623da411c6c6beb0221b847f83492ab1932bdab)
file(MAKE_DIRECTORY ${MIMALLOC_INCLUDE_DIR})

ExternalProject_Add(mimalloc2_project
  # Download via the shared retry policy (see note above). HELIO_CMAKE_DIR is
  # exported by helio/cmake/third_party.cmake.
  DOWNLOAD_COMMAND ${CMAKE_COMMAND}
      -DURL=${MIMALLOC_URL}
      -DDEST=${THIRD_PARTY_DIR}/mimalloc2-src-archive
      -DEXTRACT_DIR=${THIRD_PARTY_DIR}/mimalloc2
      -DEXPECTED_HASH=${MIMALLOC_SHA256}
      -P ${HELIO_CMAKE_DIR}/download_retry.cmake
  # DOWNLOAD_DIR (the download step's working dir) must differ from the source
  # dir: download_retry.cmake removes EXTRACT_DIR (=the source dir) before
  # moving the extracted tree into place, so it must not be the step's own CWD.
  DOWNLOAD_DIR ${THIRD_PARTY_DIR}
  SOURCE_DIR ${THIRD_PARTY_DIR}/mimalloc2
  # INSTALL_DIR ${MIMALLOC_ROOT_DIR}
  UPDATE_COMMAND ""

  PATCH_COMMAND
      patch -p1 -d ${THIRD_PARTY_DIR}/mimalloc2/ -i ${MIMALLOC_PATCH_DIR}/0_base.patch
      COMMAND patch -p1 -d ${THIRD_PARTY_DIR}/mimalloc2/ -i ${MIMALLOC_PATCH_DIR}/1_add_stat_type.patch
      COMMAND patch -p1 -d ${THIRD_PARTY_DIR}/mimalloc2/ -i ${MIMALLOC_PATCH_DIR}/2_return_stat.patch
  BUILD_COMMAND make mimalloc-static

  INSTALL_COMMAND make install
  # Copy internal types like mi_page_usage_stats_s and mi_heap_s
  COMMAND cp -r <SOURCE_DIR>/include/mimalloc ${MIMALLOC_INCLUDE_DIR}/

  LOG_INSTALL ON
  LOG_DOWNLOAD ON
  LOG_CONFIGURE ON
  LOG_BUILD ON
  LOG_PATCH ON
  LOG_UPDATE ON

  CMAKE_GENERATOR "Unix Makefiles"

  # Add -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_FLAGS=-O0 to debug, and set BUILD_BYPRODUCTS to
  # libmimalloc-debug.a

  BUILD_BYPRODUCTS ${MIMALLOC_ROOT_DIR}/lib/libmimalloc.a

  CMAKE_ARGS -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY:PATH=${MIMALLOC_ROOT_DIR}/lib
        -DCMAKE_LIBRARY_OUTPUT_DIRECTORY:PATH=${MIMALLOC_ROOT_DIR}/lib
        -DCMAKE_BUILD_TYPE:STRING=Release
        -DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
        -DMI_INSTALL_TOPLEVEL=ON
        -DMI_OVERRIDE=OFF
        -DMI_NO_PADDING=ON
        -DMI_BUILD_TESTS=OFF
        -DMI_BUILD_SHARED=OFF
        -DMI_BUILD_OBJECT=OFF
        -DCMAKE_C_FLAGS=${MIMALLOC_C_FLAGS}
        -DCMAKE_INSTALL_PREFIX:PATH=${MIMALLOC_ROOT_DIR}
)

add_library(TRDP::mimalloc2 STATIC IMPORTED)
add_dependencies(TRDP::mimalloc2 mimalloc2_project)
set_target_properties(TRDP::mimalloc2 PROPERTIES IMPORTED_LOCATION ${MIMALLOC_ROOT_DIR}/lib/libmimalloc.a
                      INTERFACE_INCLUDE_DIRECTORIES ${MIMALLOC_ROOT_DIR}/include)

add_third_party(
  croncpp
  URL https://github.com/mariusbancila/croncpp/archive/refs/tags/v2026.08.12.tar.gz
  LIB "none"
)

if (WITH_SEARCH)
  add_third_party(
    uni-algo
    URL https://github.com/uni-algo/uni-algo/archive/refs/tags/v1.2.0.tar.gz

    CMAKE_PASS_FLAGS "-DCMAKE_CXX_STANDARD:STRING=20"
  )

  add_third_party(
    hnswlib
    GIT_REPOSITORY https://github.com/dragonflydb/hnswlib.git
    # HEAD of dragonfly branch
    GIT_TAG d07dd1da2bf48b85d2f03b8396193ad7120f75c2

    BUILD_COMMAND echo SKIP
    INSTALL_COMMAND cp -R <SOURCE_DIR>/hnswlib ${THIRD_PARTY_LIB_DIR}/hnswlib/include/
    LIB "none"
  )

  # No autoconf/cmake/install in upstream Makefile; manual install copy.
  add_third_party(
    stemmer
    URL https://github.com/snowballstem/snowball/archive/refs/tags/v3.1.1.tar.gz
    BUILD_IN_SOURCE 1
    CONFIGURE_COMMAND echo skip
    BUILD_COMMAND ${DFLY_TOOLS_MAKE} -j4 CFLAGS=-O3\ -fPIC libstemmer.a
    INSTALL_COMMAND bash -c "\
      mkdir -p ${THIRD_PARTY_LIB_DIR}/stemmer/include ${THIRD_PARTY_LIB_DIR}/stemmer/lib && \
      cp <SOURCE_DIR>/include/libstemmer.h ${THIRD_PARTY_LIB_DIR}/stemmer/include/ && \
      cp <SOURCE_DIR>/libstemmer.a ${THIRD_PARTY_LIB_DIR}/stemmer/lib/"
    LIB libstemmer.a
  )
endif()

add_third_party(
  fast_float
  URL https://github.com/fastfloat/fast_float/archive/refs/tags/v8.3.0.tar.gz
  LIB "none"
)

add_third_party(
  flatbuffers
  URL https://github.com/google/flatbuffers/archive/refs/tags/v23.5.26.tar.gz
  CMAKE_PASS_FLAGS "-DFLATBUFFERS_BUILD_TESTS=OFF -DFLATBUFFERS_LIBCXX_WITH_CLANG=OFF
                    -DFLATBUFFERS_BUILD_FLATC=OFF"
)

add_third_party(
  hdr_histogram
  GIT_REPOSITORY https://github.com/HdrHistogram/HdrHistogram_c/
  GIT_TAG 0.12.0
  CMAKE_PASS_FLAGS "-DHDR_LOG_REQUIRED=OFF -DHDR_HISTOGRAM_BUILD_PROGRAMS=OFF
                    -DHDR_HISTOGRAM_INSTALL_SHARED=OFF"
  LIB libhdr_histogram_static.a
)

if(WITH_SIMSIMD)
  # Compute integer macros for native half-precision support.
  set(SIMSIMD_NATIVE_F16_VAL 0)
  set(SIMSIMD_NATIVE_BF16_VAL 0)
  if(SIMSIMD_NATIVE_F16)
    set(SIMSIMD_NATIVE_F16_VAL 1)
    set(SIMSIMD_NATIVE_BF16_VAL 1)
  endif()

  # Build statically via add_third_party using the C shim with dynamic dispatch.
  add_third_party(
    simsimd
    URL https://github.com/ashvardanian/SimSIMD/archive/refs/tags/v6.5.16.tar.gz
    BUILD_IN_SOURCE 1
    CONFIGURE_COMMAND echo skip
    BUILD_COMMAND bash -c "\
      mkdir -p ${THIRD_PARTY_LIB_DIR}/simsimd/lib && \
      ${CMAKE_C_COMPILER} -O3 -fPIC -DNDEBUG \
        -DSIMSIMD_DYNAMIC_DISPATCH=1 \
        -DSIMSIMD_NATIVE_F16=${SIMSIMD_NATIVE_F16_VAL} \
        -DSIMSIMD_NATIVE_BF16=${SIMSIMD_NATIVE_BF16_VAL} \
        -I<SOURCE_DIR>/include -c <SOURCE_DIR>/c/lib.c -o <SOURCE_DIR>/lib.o && \
      ar rcs <SOURCE_DIR>/libsimsimd.a <SOURCE_DIR>/lib.o"
    INSTALL_COMMAND bash -c "\
      mkdir -p ${THIRD_PARTY_LIB_DIR}/simsimd/include ${THIRD_PARTY_LIB_DIR}/simsimd/lib && \
      cp -R <SOURCE_DIR>/include/* ${THIRD_PARTY_LIB_DIR}/simsimd/include/ && \
      cp <SOURCE_DIR>/libsimsimd.a ${THIRD_PARTY_LIB_DIR}/simsimd/lib/"
    LIB libsimsimd.a
  )
endif()


add_library(TRDP::jsoncons INTERFACE IMPORTED)
add_dependencies(TRDP::jsoncons jsoncons_project)
set_target_properties(TRDP::jsoncons PROPERTIES
                      INTERFACE_INCLUDE_DIRECTORIES "${JSONCONS_INCLUDE_DIR}")

add_library(TRDP::dragonbox INTERFACE IMPORTED)
add_dependencies(TRDP::dragonbox dragonbox_project)
set_target_properties(TRDP::dragonbox PROPERTIES
                      INTERFACE_INCLUDE_DIRECTORIES "${DRAGONBOX_INCLUDE_DIR}")

add_library(TRDP::croncpp INTERFACE IMPORTED)
add_dependencies(TRDP::croncpp croncpp_project)
set_target_properties(TRDP::croncpp PROPERTIES
                      INTERFACE_INCLUDE_DIRECTORIES "${CRONCPP_INCLUDE_DIR}")

if (WITH_SEARCH)
  add_library(TRDP::hnswlib INTERFACE IMPORTED)
  add_dependencies(TRDP::hnswlib hnswlib_project)
  set_target_properties(TRDP::hnswlib PROPERTIES
                        INTERFACE_INCLUDE_DIRECTORIES "${HNSWLIB_INCLUDE_DIR}")
endif()

add_library(TRDP::fast_float INTERFACE IMPORTED)
add_dependencies(TRDP::fast_float fast_float_project)
set_target_properties(TRDP::fast_float PROPERTIES
                      INTERFACE_INCLUDE_DIRECTORIES "${FAST_FLOAT_INCLUDE_DIR}")