###########################################################################
#
# Copyright 2016 Realm Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
###########################################################################

include(CheckSymbolExists)

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED on)
set(CMAKE_CXX_EXTENSIONS off)

set_property(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS
    $<$<CONFIG:DEBUG>:REALM_DEBUG>
    $<$<CONFIG:COVERAGE>:REALM_DEBUG>
)

if(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang" OR ${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
    add_compile_options(
        -Wall
        -Wextra
        -Wno-missing-field-initializers
        -Wno-unevaluated-expression
        -Wempty-body
        -Wparentheses
        -Wunknown-pragmas
        -Wunreachable-code
        -DREALM_HAVE_CONFIG
    )
endif()

if(MSVC)
    add_definitions(
        /D_UNICODE
        /DWIN32_LEAN_AND_MEAN
        /D_CRT_SECURE_NO_WARNINGS
        /D_SCL_SECURE_NO_WARNINGS
        /D_ENABLE_EXTENDED_ALIGNED_STORAGE #https://developercommunity.visualstudio.com/comments/279328/view.html
    )
    add_compile_options(
        /MP # Enable multi-processor compilation
    )
    if(NOT WINDOWS_STORE)
        # Statically link the run-time library
        # https://docs.microsoft.com/bg-bg/cpp/build/reference/md-mt-ld-use-run-time-library
        # https://cmake.org/Wiki/CMake_FAQ#How_can_I_build_my_MSVC_application_with_a_static_runtime.3F
        foreach(flag_var
            CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
            CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
            if(${flag_var} MATCHES "/MD")
                string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
            endif()
        endforeach()
    endif()
endif()

if(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
    add_compile_options(
        -Wassign-enum
        -Wbool-conversion
        -Wconditional-uninitialized
        -Wconstant-conversion
        -Wenum-conversion
        -Wimplicit-fallthrough
        -Wint-conversion
        -Wmissing-prototypes
        -Wnewline-eof
        -Wshorten-64-to-32
        -Wthread-safety
        -Wthread-safety-negative
    )
endif()

if(${CMAKE_GENERATOR} STREQUAL "Ninja")
    if(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fcolor-diagnostics")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fcolor-diagnostics")
    elseif(${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fdiagnostics-color=always")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fdiagnostics-color=always")
    endif()
endif()

if(APPLE)
    find_library(CF_LIBRARY CoreFoundation)
    list(APPEND PLATFORM_LIBRARIES ${CF_LIBRARY})
elseif(REALM_PLATFORM STREQUAL "Android")
    find_library(ANDROID_LIBRARY android)
    find_library(ANDROID_LOG_LIBRARY log)
    list(APPEND PLATFORM_LIBRARIES ${ANDROID_LIBRARY})
    list(APPEND PLATFORM_LIBRARIES ${ANDROID_LOG_LIBRARY})
    set(PLATFORM_DEFINES "__STDC_CONSTANT_MACROS=1")
endif()

if(NOT REALM_PLATFORM OR REALM_PLATFORM STREQUAL "Node")
    find_library(UV_LIBRARY NAMES uv libuv)
    if(UV_LIBRARY)
        find_path(UV_INCLUDE_DIR uv.h)

        list(APPEND PLATFORM_LIBRARIES ${UV_LIBRARY})
        add_definitions(-DREALM_HAVE_UV)
    endif()
endif()

if(REALM_PLATFORM STREQUAL "Node")
    set(PLATFORM_DEFINES "REALM_PLATFORM_NODE=1")
    if(NOT UV_LIBRARY)
        message(FATAL_ERROR "Platform set to Node but libuv was not found!")
    endif()
endif()

check_symbol_exists(epoll_create sys/epoll.h REALM_HAVE_EPOLL)
if(REALM_HAVE_EPOLL)
    add_definitions(-DREALM_HAVE_EPOLL)
endif()