# FetchContent requires cmake >=3.11
# see https://cmake.org/cmake/help/v3.11/module/FetchContent.html
cmake_minimum_required(VERSION 3.11 FATAL_ERROR)

include(FetchContent)

# Some tests (the exhaustive sweeps) parallelize across std::thread.
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)

option(SYSTEM_DOCTEST "Use system copy of doctest" OFF)
option(FASTFLOAT_SUPPLEMENTAL_TESTS "Run supplemental tests" ON)

if (NOT SYSTEM_DOCTEST)
  FetchContent_Declare(doctest
    GIT_REPOSITORY https://github.com/lemire/doctest.git)
else ()
  find_package(doctest REQUIRED)
endif()
if (FASTFLOAT_SUPPLEMENTAL_TESTS)
  FetchContent_Declare(supplemental_test_files
    GIT_REPOSITORY https://github.com/fastfloat/supplemental_test_files.git
    GIT_TAG origin/main)
endif()


# FetchContent_MakeAvailable() was only introduced in 3.14
# https://cmake.org/cmake/help/v3.14/release/3.14.html#modules
if (NOT SYSTEM_DOCTEST)
  FetchContent_MakeAvailable(doctest)
endif()

add_library(supplemental-data INTERFACE)
if (FASTFLOAT_SUPPLEMENTAL_TESTS)
  message(STATUS "Supplemental tests enabled. Retrieving test files.")
  FetchContent_MakeAvailable(supplemental_test_files)
  message(STATUS "Supplemental test files retrieved.")
  target_compile_definitions(supplemental-data INTERFACE SUPPLEMENTAL_TEST_DATA_DIR="${supplemental_test_files_BINARY_DIR}/data")
endif()

function(fast_float_add_cpp_test TEST_NAME)
    add_executable(${TEST_NAME} ${TEST_NAME}.cpp)
    if(CMAKE_CROSSCOMPILING)
        set(ccemulator ${CMAKE_CROSSCOMPILING_EMULATOR})
    endif()
    add_test(NAME ${TEST_NAME}
        COMMAND ${ccemulator} $<TARGET_FILE:${TEST_NAME}>)
    if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
      target_compile_options(${TEST_NAME} PUBLIC /EHsc)
    endif()
    if(NOT WIN32)
      target_compile_options(${TEST_NAME} PUBLIC -Werror -Wall -Wextra -Weffc++)
      target_compile_options(${TEST_NAME} PUBLIC -Wsign-compare -Wshadow -Wwrite-strings -Wpointer-arith -Winit-self -Wconversion -Wsign-conversion)
    endif()
    target_link_libraries(${TEST_NAME} PUBLIC fast_float supplemental-data)
    target_link_libraries(${TEST_NAME} PUBLIC Threads::Threads)
    if (NOT SYSTEM_DOCTEST)
      target_link_libraries(${TEST_NAME} PUBLIC doctest)
    else ()
      target_link_libraries(${TEST_NAME} PUBLIC doctest::doctest)
    endif()
endfunction(fast_float_add_cpp_test)

fast_float_add_cpp_test(rcppfastfloat_test)
fast_float_add_cpp_test(wide_char_test)
fast_float_add_cpp_test(supported_chars_test)
fast_float_add_cpp_test(example_test)
fast_float_add_cpp_test(example_comma_test)
fast_float_add_cpp_test(example_integer_times_pow10)
fast_float_add_cpp_test(basictest)
option(FASTFLOAT_CONSTEXPR_TESTS "Require constexpr tests (build will fail if the compiler won't support it)" OFF)
if (FASTFLOAT_CONSTEXPR_TESTS)
  target_compile_features(basictest PRIVATE cxx_std_20)
  target_compile_definitions(basictest PRIVATE FASTFLOAT_CONSTEXPR_TESTS)
else()
  target_compile_features(basictest PRIVATE cxx_std_17)
endif()
if (FASTFLOAT_SUPPLEMENTAL_TESTS)
  target_compile_definitions(basictest PRIVATE FASTFLOAT_SUPPLEMENTAL_TESTS)
endif()
fast_float_add_cpp_test(p2497)
fast_float_add_cpp_test(long_test)
fast_float_add_cpp_test(powersoffive_hardround)
fast_float_add_cpp_test(string_test)
fast_float_add_cpp_test(fast_int)
target_compile_features(fast_int PRIVATE cxx_std_17)
fast_float_add_cpp_test(json_fmt)
fast_float_add_cpp_test(fortran)
if(CMAKE_CXX_STANDARD GREATER_EQUAL 23)
  option(FASTFLOAT_FIXEDWIDTH_TESTS "Require fixed width test for C++23 (build will fail if the compiler won't support it)" ON)
else()
  option(FASTFLOAT_FIXEDWIDTH_TESTS "Require fixed width test for C++23 (build will fail if the compiler won't support it)" OFF)
endif()
if (FASTFLOAT_FIXEDWIDTH_TESTS)
  fast_float_add_cpp_test(fixedwidthtest)
  target_compile_features(fixedwidthtest PUBLIC cxx_std_23)
endif()

option(FASTFLOAT_EXHAUSTIVE "Exhaustive tests" OFF)

if (FASTFLOAT_EXHAUSTIVE)
  fast_float_add_cpp_test(ipv4_test)
  fast_float_add_cpp_test(short_random_string)
  fast_float_add_cpp_test(exhaustive32_midpoint)
  fast_float_add_cpp_test(random_string)
  fast_float_add_cpp_test(exhaustive32)
  fast_float_add_cpp_test(exhaustive32_64)
  fast_float_add_cpp_test(long_exhaustive32)
  fast_float_add_cpp_test(long_exhaustive32_64)
  fast_float_add_cpp_test(long_random64)
  fast_float_add_cpp_test(random64)
endif(FASTFLOAT_EXHAUSTIVE)

add_subdirectory(build_tests)
add_subdirectory(bloat_analysis)
