set(CMAKE_DISABLE_IN_SOURCE_BUILD ON)
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

cmake_minimum_required(VERSION 3.18 FATAL_ERROR)
project(floormat C CXX)

set(CMAKE_POLICY_DEFAULT_CMP0069 NEW)
set(CMAKE_POLICY_DEFAULT_CMP0068 NEW)
#set(CMAKE_POLICY_DEFAULT_CMP0117 NEW)

set(CMAKE_CXX_STANDARD 23)
set(CMAKE_CXX_STANDARD_DEFAULT 23)
set(CMAKE_CXX_STANDARD_REQUIRED TRUE)
set(CMAKE_CXX_EXTENSIONS FALSE)
set(CMAKE_CXX_SCAN_FOR_MODULES FALSE)

set(CMAKE_C_STANDARD 17)
set(CMAKE_C_STANDARD_DEFAULT 11)
set(CMAKE_C_STANDARD_REQUIRED TRUE)
set(CMAKE_C_EXTENSIONS FALSE)

set(CMAKE_C_VISIBILITY_PRESET hidden)
set(CMAKE_CXX_VISIBILITY_PRESET hidden)
set(CMAKE_VISIBILITY_INLINES_HIDDEN ON)
set(CMAKE_C_LINKER_PREFERENCE_PROPAGATES OFF)
set(CMAKE_CXX_LINKER_PREFERENCE_PROPAGATES ON)
set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)

set(CMAKE_INSTALL_MESSAGE LAZY)
set(CMAKE_COLOR_DIAGNOSTICS ON)

set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
set(CMAKE_SKIP_INSTALL_RPATH FALSE)
set(CMAKE_SKIP_RPATH FALSE)

if(NOT GENERATOR_IS_MULTI_CONFIG)
    if(CMAKE_BUILD_TYPE STREQUAL "")
        set(CMAKE_BUILD_TYPE "RELEASE" CACHE STRING "Build type" FORCE)
    endif()
    string(TOUPPER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING "Build type" FORCE)
    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "DEBUG;RELEASE;RELWITHDEBINFO")
endif()

if(NOT MSVC)
    set(FLOORMAT_SPLIT-DEBUG-INFO ON CACHE BOOL
        "whether to strip out debug info from foo.exe to foo.exe.debug")
endif()

if(CMAKE_INSTALL_PREFIX STREQUAL "" OR CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
    set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH "" FORCE)
endif()

if(NOT DEFINED CMAKE_RUNTIME_OUTPUT_DIRECTORY AND NOT DEFINED CMAKE_LIBRARY_OUTPUT_DIRECTORY AND NOT DEFINED CMAKE_ARCHIVE_OUTPUT_DIRECTORY)
    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/lib")
    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/lib")
endif()
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/bin")

function(sets type)
    set(i 0)
    list(LENGTH ARGN max)
    math(EXPR foo "${max} % 2")
    if(NOT foo EQUAL 0)
        message(FATAL_ERROR "argument count not even")
    endif()
    while(i LESS max)
        list(GET ARGN "${i}" name)
        math(EXPR i "${i} + 1")
        list(GET ARGN "${i}" value)
        math(EXPR i "${i} + 1")
        set(${name} "${value}" CACHE "${type}" "" FORCE)
    endwhile()
endfunction()

macro(fm_run_hook str)
    if(COMMAND "${str}")
        cmake_language(CALL "${str}")
    endif()
endmacro()

macro(fm_load_userconfig)
    if(NOT DEFINED FLOORMAT_USERCONFIG)
        if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
            set(ENV{USER} "$ENV{USERNAME}")
        endif()
        sets(FILEPATH FLOORMAT_USERCONFIG "${CMAKE_CURRENT_SOURCE_DIR}/userconfig-$ENV{USER}@${CMAKE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}.cmake")
    endif()
    if(NOT FLOORMAT_USERCONFIG STREQUAL "")
        if(EXISTS "${FLOORMAT_USERCONFIG}")
            #message(STATUS "Loading user config '${FLOORMAT_USERCONFIG}'")
            include("${FLOORMAT_USERCONFIG}" NO_POLICY_SCOPE)
        else()
            message(STATUS "Can't find user config '${FLOORMAT_USERCONFIG}'")
        endif()
    endif()
endmacro()

if(WIN32)
    if(MSVC)
        set(CMAKE_RC_FLAGS "/nologo /DWIN32")
    endif()
    enable_language(RC)
endif()

if(NOT "$ENV{FLOORMAT_NO_USERCONFIG}" AND NOT FLOORMAT_NO_USERCONFIG)
    fm_load_userconfig()
    if(NOT GENERATOR_IS_MULTI_CONFIG)
        string(TOUPPER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE)
        set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING "" FORCE)
    endif()
endif()

if(WIN32)
    add_definitions(-D_CRT_SECURE_NO_WARNINGS -DNOMINMAX -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0)
endif()

if(NOT APPLE AND NOT WIN32)
    add_compile_options(-fno-plt)
    add_link_options(-Wl,-z,relro,-z,now)
    add_link_options(-Wl,-z,noexecstack)
endif()

add_definitions(
    -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS
    -DIMGUI_DISABLE_OBSOLETE_KEYIO
)

if(MSVC)
    add_definitions(-D_USE_MATH_DEFINES=1)
    add_compile_options(-permissive-)
    add_compile_options(-Zc:preprocessor -Zc:inline -Zc:lambda -Zc:throwingNew -Zc:__cplusplus)
    add_compile_options(-external:W0 -external:anglebrackets)
    add_compile_options(
        #-wd4244 # warning C4244: 'argument': conversion from 'int' to 'float', possible loss of data
        #-wd4251 # warning C4251: 't::f': class 'x' needs to have dll-interface to be used by clients of class 'y'
        -wd4456  # warning C4456: declaration of 'x' hides previous local declaration
        -wd4458  # warning C4458: declaration of 'keys' hides class member
        -wd4127  # warning C4127: conditional expression is constant
        -wd4554  # warning C4554: '<<': check operator precedence for possible error; use parentheses to clarify precedence
        -wd4146  # warning C4146: unary minus operator applied to unsigned type, result still unsigned
        -wd4197  # warning C4197: 'volatile int': top-level volatile in cast is ignored
    )
    add_definitions(-utf-8)
    if(CMAKE_SIZEOF_VOID_P GREATER 4)
        add_link_options(-HIGHENTROPYVA)
    endif()
else()
    add_compile_options(-Wno-float-equal)
    if(NOT WIN32)
        add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-fuse-cxa-atexit>)
    endif()
    if(WIN32)
        add_link_options(-Wl,--nxcompat -Wl,--dynamicbase)
        if(CMAKE_SIZEOF_VOID_P GREATER_EQUAL 8)
            add_link_options(-Wl,--high-entropy-va)
        else()
            add_link_options(-Wl,--large-address-aware)
        endif()
    endif()
endif()

if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
    add_compile_definitions($<$<COMPILE_LANGUAGE:CXX>:$<$<CONFIG:DEBUG,Debug>:_LIBCPP_ENABLE_ASSERTIONS>>)
    add_compile_options(-Wno-reserved-macro-identifier)
    add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-Wno-ambiguous-reversed-operator>)
endif()

set_directory_properties(PROPERTIES CORRADE_USE_PEDANTIC_FLAGS OFF)
set_directory_properties(PROPERTIES CORRADE_CXX_STANDARD ${CMAKE_CXX_STANDARD})
set_directory_properties(PROPERTIES INTERFACE_CORRADE_CXX_STANDARD ${CMAKE_CXX_STANDARD})

add_subdirectory(external)

if(CMAKE_SIZEOF_VOID_P GREATER_EQUAL 8)
    add_definitions(-DFLOORMAT_64)
endif()

if(MSVC)
    add_compile_options($<$<COMPILE_LANGUAGE:CXX>:/FIcompat/prelude.hpp>)
else()
    add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-includecompat/prelude.hpp>)
endif()

if(MSVC)
    add_compile_options(-GR-)
else()
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
endif()

if(APPLE)
    set(floormat_headless-library Magnum::WindowlessCglApplication)
elseif(WIN32)
    set(floormat_headless-library Magnum::WindowlessWglApplication ntdll)
else()
    set(floormat_headless-library Magnum::WindowlessGlxApplication)
endif()

include_directories(.)
include_directories(include)

#get_property(_fm-sdl2-include-dirs TARGET SDL2::SDL2 PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
get_property(_fm-json-include-dirs TARGET nlohmann_json::nlohmann_json PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
include_directories(SYSTEM
    "${CORRADE_INCLUDE_DIR}"
    "${MAGNUM_INCLUDE_DIR}"
    "${MAGNUMPLUGINS_INCLUDE_DIR}"
    "${MAGNUMINTEGRATION_INCLUDE_DIR}"
    #"${_fm-sdl2-include-dirs}"
    "${_fm-json-include-dirs}"
)

fm_run_hook(fm-userconfig-src)

if(CMAKE_COMPILER_IS_GNUCXX)
    add_compile_options(-Wno-float-equal)
    add_compile_options(-Wreturn-type -Werror=return-type)
endif()

if (CMAKE_CXX_COMPILER_ID MATCHES "Clang$")
    add_definitions(-D_LIBCPP_REMOVE_TRANSITIVE_INCLUDES)
    add_compile_options(-Wno-shift-op-parentheses)
elseif(CMAKE_COMPILER_IS_GNUCXX)
    add_compile_options(-Wno-subobject-linkage -Wno-parentheses -Wno-overloaded-virtual)
endif()

function(fm_install_executable self)
    if(NOT MSVC AND NOT APPLE AND FLOORMAT_SPLIT-DEBUG-INFO)
        if(CMAKE_RUNTIME_OUTPUT_DIRECTORY STREQUAL "")
            message(FATAL_ERROR "")
        endif()
        if(NOT CMAKE_OBJCOPY)
            message(FATAL_ERROR "objcopy missing")
        endif()
        get_property(self_ TARGET "${self}" PROPERTY OUTPUT_NAME)
        if (NOT "${self_}" STREQUAL "")
            set(exe "${self_}")
        else()
            set(exe "${self}")
        endif()
        set(exe "${exe}${CMAKE_EXECUTABLE_SUFFIX}")
        add_custom_command(TARGET ${self} POST_BUILD
                           COMMAND "${CMAKE_OBJCOPY}" --only-keep-debug "${exe}" "${exe}.debug"
                           COMMAND "${CMAKE_OBJCOPY}" --strip-all "${exe}" "${exe}.nodebug"
                           COMMAND "${CMAKE_OBJCOPY}" --add-gnu-debuglink=${exe}.debug "${exe}.nodebug"
                           # BYPRODUCTS "${exe}.debug" "${exe}.nodebug"
                           WORKING_DIRECTORY "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}"
        )
        install(FILES "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${exe}.debug" DESTINATION bin)
        install(PROGRAMS "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${exe}.nodebug" RENAME "${exe}" DESTINATION bin)
    else()
        install(PROGRAMS "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${exe}" DESTINATION bin)
        if(MSVC)
            install(FILES $<TARGET_PDB_FILE:${self}> DESTINATION bin OPTIONAL)
        endif()
    endif()
endfunction()

add_subdirectory(src)
add_subdirectory(main)
add_subdirectory(draw)
add_subdirectory(serialize)
add_subdirectory(editor)
add_subdirectory(test)
add_subdirectory(anim-crop-tool)
add_subdirectory(wall-tileset-tool)

find_package(benchmark QUIET)
if(TARGET benchmark::benchmark OR TARGET benchmark)
    add_subdirectory(bench)
endif()

function(fm_escape_string var str)
    string(REGEX REPLACE "([^_A-Za-z0-9./:-])" "\\\\\\1" str "${str}")
    set(${var} "${str}" PARENT_SCOPE)
endfunction()

function(fm_install_kill_directory dir)
    fm_escape_string(quoted-dir "${CMAKE_INSTALL_PREFIX}/share/floormat/${dir}")
    #install(CODE "message(FATAL_ERROR \"foo ${quoted-dir}\")")
    install(CODE "file(REMOVE_RECURSE \"${quoted-dir}\")")
endfunction()

function(fm_install_assets)
    set(CMAKE_INSTALL_MESSAGE NEVER)
    foreach(subdir images anim scenery vobj ground walls)
        fm_install_kill_directory("${subdir}")
        install(DIRECTORY "${subdir}" DESTINATION "share/floormat")
    endforeach()
endfunction()
fm_install_assets()

fm_run_hook(fm-userconfig-post)

add_test(floormat-testsuite "${CMAKE_INSTALL_PREFIX}/bin/floormat-test")

enable_testing()
if(NOT TARGET "corrade-test")
    add_custom_target(corrade-test COMMENT "CORRADE_TEST is disabled")
endif()