set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${CMAKE_SOURCE_DIR}/cmake/modules")
cmake_minimum_required(VERSION 3.16)

set(MAJOR "0")
set(MINOR "0")
set(PATCH "1")
cmake_policy(SET CMP0048 NEW)

project(BTree VERSION ${MAJOR}.${MINOR}.${PATCH})

option(FORCE_USE_SIMD "force define FC_USE_SIMD (apllicable only for x86_64)" OFF)
option(FORCE_PREFER_BINARY_SEARCH "force define FC_PREFER_BINARY_SEARCH (recommended for clang only)" OFF)

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(VersionHeader)
set(PROJECT_VERSION "${MAJOR}.${MINOR}.${PATCH}.${COMMITTER_SHORTSHA}")
file(WRITE ${CMAKE_SOURCE_DIR}/VERSION.txt "${MAJOR}.${MINOR}.${PATCH}")

find_package(Catch2 3 QUIET)
set(Catch_VER 3)
if (NOT Catch2_FOUND)
    find_package(Catch2 REQUIRED)
    set(Catch_VER 2)
endif()
set(CATCH_LIBS_ALIASES Catch2::Catch2 Catch2::Catch2WithMain)

function(get_linux_lsb_release_information)
    execute_process(COMMAND sh -c "cat /etc/*release | grep -w ID | cut -d'=' -f 2" OUTPUT_VARIABLE LSB_RELEASE_ID_SHORT OUTPUT_STRIP_TRAILING_WHITESPACE)
    execute_process(COMMAND sh -c "cat /etc/*release | grep ^VERSION_ID | cut -d'=' -f 2" OUTPUT_VARIABLE LSB_RELEASE_VERSION_SHORT OUTPUT_STRIP_TRAILING_WHITESPACE)
    execute_process(COMMAND sh -c "cat /etc/*release | grep ^VERSION_CODENAME | cut -d'=' -f 2" OUTPUT_VARIABLE LSB_RELEASE_CODENAME_SHORT OUTPUT_STRIP_TRAILING_WHITESPACE)

    set(LSB_RELEASE_ID_SHORT "${LSB_RELEASE_ID_SHORT}" PARENT_SCOPE)
    set(LSB_RELEASE_VERSION_SHORT "${LSB_RELEASE_VERSION_SHORT}" PARENT_SCOPE)
    set(LSB_RELEASE_CODENAME_SHORT "${LSB_RELEASE_CODENAME_SHORT}" PARENT_SCOPE)
endfunction()

message(STATUS "COMMITTER_FULLSHA ${COMMITTER_FULLSHA}")
message(STATUS "COMMITTER_SHORTSHA ${COMMITTER_SHORTSHA}")
message(STATUS "COMMITTER_DATE ${COMMITTER_DATE}")
message(STATUS "PROJECT_VERSION ${PROJECT_VERSION}")

if(CMAKE_SYSTEM_NAME MATCHES "Linux")
    get_linux_lsb_release_information()
    message(STATUS "OS Linux ${LSB_RELEASE_ID_SHORT} ${LSB_RELEASE_VERSION_SHORT} ${LSB_RELEASE_CODENAME_SHORT}")
else()
    message(STATUS "OS ${CMAKE_SYSTEM_NAME}")
    message(STATUS "OS VERSION ${CMAKE_SYSTEM_VERSION}")
endif()


add_library(BTree INTERFACE
    include/fc/comp.h 
    include/fc/disk_fixed_alloc.h 
    include/fc/mmfile.h 
    include/fc/btree.h 
    include/fc/disk_btree.h
    include/fc/mmfile_win.h
    include/fc/mmfile_nix.h
    include/fc/details.h)

target_include_directories(
    BTree
    INTERFACE
        "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
        "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>" )

add_library(BTree::BTree ALIAS BTree)

if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR FORCE_PREFER_BINARY_SEARCH)
    add_definitions(-DFC_PREFER_BINARY_SEARCH=1)
endif()

if (FORCE_USE_SIMD)
    add_definitions(-DFC_USE_SIMD=1)
endif ()

add_executable(fc_tests
    test/test_statistics.h
    test/test_statistics.cpp
    test/fc_catch2.h
    test/unittest.cpp
    test/rwtest.cpp
    test/perftest.cpp
    test/perftest_no_simd.cpp
    test/perftest_string.cpp)

if (${Catch_VER} EQUAL 2)
    message(STATUS "Used old target for catch2")
    if (NOT TARGET Catch2::Catch2WithMain)
        set(CATCH_LIBS_ALIASES Catch2::Catch2)
    endif()
    target_compile_definitions(fc_tests PRIVATE CATCH2_OLD)
endif()

target_include_directories(fc_tests PRIVATE ${CMAKE_CURRENT_LIST_DIR})
target_link_libraries(fc_tests PRIVATE ${CATCH_LIBS_ALIASES} BTree::BTree)

if(MSVC)
    target_compile_options(fc_tests PRIVATE /W4 /WX /nologo /MDd /EHsc /std:c++latest /experimental:module)
    set(CMAKE_C_FLAGS_RELEASE "/Ox")
    set(CMAKE_CXX_FLAGS_RELEASE "/Ox")
    set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "/Ox")
else()
    set(CMAKE_C_FLAGS_RELEASE "-O3")
    set(CMAKE_CXX_FLAGS_RELEASE "-O3")
    set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O3")
    if (FORCE_USE_SIMD)
        target_compile_options(fc_tests PRIVATE -Wall -Wextra -Wpedantic -Werror -mavx512f)
    else ()
        target_compile_options(fc_tests PRIVATE -Wall -Wextra -Wpedantic -Werror -march=native -mtune=generic)
    endif ()
    if(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS_EQUAL 14.0.3.14030022)
        target_link_options(fc_tests PRIVATE -fexperimental-library)
    endif()
    if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS_EQUAL 14)
        target_link_options(fc_tests PRIVATE -fexperimental-library)
    endif()
endif()

include(CTest)
include(Catch)
catch_discover_tests(fc_tests
    EXTRA_ARGS --benchmark-samples=1)

set(CPACK_SOURCE_IGNORE_FILES
    #git files
    "\\\\.git/"
    "\\\\.github/"
    # temporary files
    "\\\\.swp$"
    # backup files
    "~$"
    # eclipse files
    "\\\\.cdtproject$"
    "\\\\.cproject$"
    "\\\\.project$"
    "\\\\.settings/"
    # others
    "\\\\.#"
    "/#"
    "/build/"
    "/_build/"
    "/\\\\.git/"
    "Makefile\\\\.in$"
)

include(GNUInstallDirs)

install(
    TARGETS BTree
    EXPORT BTree_Targets
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})

include(CMakePackageConfigHelpers)
write_basic_package_version_file(
    "BTreeConfigVersion.cmake"
    VERSION ${MAJOR}.${MINOR}.${PATCH}
    COMPATIBILITY SameMajorVersion)

configure_package_config_file(
    "${PROJECT_SOURCE_DIR}/cmake/BTreeConfig.cmake.in"
    "${PROJECT_BINARY_DIR}/BTreeConfig.cmake"
    INSTALL_DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/BTree/cmake)

install(
    EXPORT BTree_Targets
    FILE BTreeTargets.cmake
    NAMESPACE BTree::
    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/BTree/cmake)

install(FILES "${PROJECT_BINARY_DIR}/BTreeConfig.cmake"
    "${PROJECT_BINARY_DIR}/BTreeConfigVersion.cmake"
    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/BTree/cmake)

install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/fc
    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})

set(CPACK_PACKAGE_NAME "BTree")
set(CPACK_PACKAGE_VERSION "${MAJOR}.${MINOR}.${PATCH}")
set(CPACK_PACKAGE_VENDOR "community")
set(CPACK_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}-noarch")
set(CMAKE_PROJECT_HOMEPAGE_URL "https://github.com/bas524/BTree")
set(CPACK_PACKAGE_CONTACT "bas524")
set(CPACK_PACKAGE_MAINTAINER "bas524")
set(CPACK_PACKAGE_DESCRIPTION "A general-purpose high-performance lightweight STL-like modern C++ B-Tree")

set(CPACK_DEBIAN_PACKAGE_NAME ${CPACK_PACKAGE_NAME})
set(CPACK_DEBIAN_PACKAGE_VERSION ${CPACK_PACKAGE_VERSION})
set(CPACK_DEBIAN_PACKAGE_MAINTAINER ${CPACK_PACKAGE_MAINTAINER})
set(CPACK_DEBIAN_PACKAGE_DESCRIPTION ${CPACK_PACKAGE_DESCRIPTION})
set(CPACK_DEBIAN_PACKAGE_HOMEPAGE ${CMAKE_PROJECT_HOMEPAGE_URL})
set(CPACK_DEBIAN_PACKAGE_LICENSE "Apache-2.0")
set(CPACK_DEBIAN_PACKAGE_DEPENDS "")

set(CPACK_RPM_PACKAGE_NAME ${CPACK_PACKAGE_NAME})
set(CPACK_RPM_PACKAGE_VERSION ${CPACK_PACKAGE_VERSION})
set(CPACK_RPM_PACKAGE_MAINTAINER ${CPACK_PACKAGE_MAINTAINER})
set(CPACK_RPM_PACKAGE_DESCRIPTION ${CPACK_PACKAGE_DESCRIPTION})
set(CPACK_RPM_PACKAGE_URL ${CMAKE_PROJECT_HOMEPAGE_URL})
set(CPACK_RPM_PACKAGE_LICENSE "Apache-2.0")
set(CPACK_RPM_PACKAGE_REQUIRES "")

include(CPack)