# Copyright (C) 2018-2025 Intel Corporation
# SPDX-License-Identifier: Apache-2.0
#

# TBB_FOUND should not be set explicitly. It is defined automatically by CMake.
# Handling of TBB_VERSION is in TBBConfigVersion.cmake.

if (NOT TBB_FIND_COMPONENTS)
    set(TBB_FIND_COMPONENTS "tbb;tbbmalloc;tbbmalloc_proxy")
    foreach (_tbb_component ${TBB_FIND_COMPONENTS})
        set(TBB_FIND_REQUIRED_${_tbb_component} 1)
    endforeach()
endif()

# Add components with internal dependencies: tbbmalloc_proxy -> tbbmalloc
list(FIND TBB_FIND_COMPONENTS tbbmalloc_proxy _tbbmalloc_proxy_ix)
if (NOT _tbbmalloc_proxy_ix EQUAL -1)
    list(FIND TBB_FIND_COMPONENTS tbbmalloc _tbbmalloc_ix)
    if (_tbbmalloc_ix EQUAL -1)
        list(APPEND TBB_FIND_COMPONENTS tbbmalloc)
        set(TBB_FIND_REQUIRED_tbbmalloc ${TBB_FIND_REQUIRED_tbbmalloc_proxy})
    endif()
endif()

if (NOT TBBROOT)
    if(DEFINED ENV{TBBROOT})
        set (TBBROOT $ENV{TBBROOT})
    else()
        message("FATAL_ERROR" "TBBROOT is unset")
    endif()
endif()

set(_tbb_root ${TBBROOT})

set(_tbb_x32_subdir .)
set(_tbb_x64_subdir .)

if (CMAKE_SIZEOF_VOID_P EQUAL 8)
    set(_tbb_arch_subdir ${_tbb_x64_subdir})
else()
    set(_tbb_arch_subdir ${_tbb_x32_subdir})
endif()

set(_tbb_compiler_subdir .)

get_filename_component(_tbb_lib_path "${_tbb_root}/lib/${_tbb_arch_subdir}/${_tbb_compiler_subdir}" ABSOLUTE)

if (TBB_FOUND)
    return()
endif()

# detect version
find_file(_tbb_def_header tbb_stddef.h HINTS "${_tbb_root}/include/tbb")

if (_tbb_def_header)
    file(READ "${_tbb_def_header}" _tbb_def_content)
    string(REGEX MATCH "TBB_VERSION_MAJOR[ ]*[0-9]*" _tbb_version_major ${_tbb_def_content})
    string(REGEX MATCH "[0-9][0-9]*" _tbb_version_major ${_tbb_version_major})

    string(REGEX MATCH "TBB_VERSION_MINOR[ ]*[0-9]" _tbb_version_minor ${_tbb_def_content})
    string(REGEX MATCH "[0-9][0-9]*" _tbb_version_minor ${_tbb_version_minor})

    set(TBB_VERSION "${_tbb_version_major}.${_tbb_version_minor}")
else()
    set(TBB_VERSION "")
endif()

foreach (_tbb_component ${TBB_FIND_COMPONENTS})
    set(_tbb_release_lib "${_tbb_lib_path}/lib${_tbb_component}.dylib")
    set(_tbb_debug_lib "${_tbb_lib_path}/lib${_tbb_component}_debug.dylib")

    if (EXISTS "${_tbb_release_lib}" AND EXISTS "${_tbb_debug_lib}")
        if (NOT TARGET TBB::${_tbb_component})
            add_library(TBB::${_tbb_component} SHARED IMPORTED)
            set_target_properties(TBB::${_tbb_component} PROPERTIES
                                  IMPORTED_CONFIGURATIONS "RELEASE;DEBUG"
                                  IMPORTED_LOCATION_RELEASE     "${_tbb_release_lib}"
                                  IMPORTED_LOCATION_DEBUG       "${_tbb_debug_lib}"
                                  INTERFACE_INCLUDE_DIRECTORIES "${_tbb_root}/include")

            # Add internal dependencies for imported targets: TBB::tbbmalloc_proxy -> TBB::tbbmalloc
            if (_tbb_component STREQUAL tbbmalloc_proxy)
                set_target_properties(TBB::tbbmalloc_proxy PROPERTIES INTERFACE_LINK_LIBRARIES TBB::tbbmalloc)
            endif()

            list(APPEND TBB_IMPORTED_TARGETS TBB::${_tbb_component})
            set(TBB_${_tbb_component}_FOUND 1)
        endif()
    elseif (TBB_FIND_REQUIRED AND TBB_FIND_REQUIRED_${_tbb_component})
        message(FATAL_ERROR "Missed required Intel TBB component: ${_tbb_component}")
    endif()
endforeach()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(TBB
    REQUIRED_VARS TBB_tbb_FOUND)

unset(_tbb_x32_subdir)
unset(_tbb_x64_subdir)
unset(_tbb_arch_subdir)
unset(_tbb_compiler_subdir)
unset(_tbbmalloc_proxy_ix)
unset(_tbbmalloc_ix)
unset(_tbb_lib_path)
unset(_tbb_release_lib)
unset(_tbb_debug_lib)