#
# This file is part of the CMaNGOS Project. See AUTHORS file for Copyright information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

# Minimum required cmake version to run the build
cmake_minimum_required(VERSION 3.9)
cmake_policy(SET CMP0069 NEW)

# Will cache object files if ccache is available
# Must be set at top of cmake outside of project header
find_program(CCACHE_PROGRAM ccache)
if(CCACHE_PROGRAM)
    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
endif()

project(CMaNGOS_TBC)

# Require C++ 17 support
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

# Define here name of the binaries
set(CMANGOS_BINARY_SERVER_NAME "mangosd")
set(CMANGOS_BINARY_REALMD_NAME "realmd")

# Function to remove duplicate entries in provided string
function(RemoveDuplicateSubstring stringIn stringOut)
    separate_arguments(stringIn)
    list(REMOVE_DUPLICATES stringIn)
    string(REPLACE ";" " " stringIn "${stringIn}")
    set(${stringOut} "${stringIn}" PARENT_SCOPE)
endfunction()

# Macro that replace /Wx with /W0 (supposed to disable warnings)
MACRO(DisableWarnings)
  if(MSVC)
    set(DisableWarningsFlag "/W0")
    set(SearchWarningsFlag1 "/W[0-4]")
    set(SearchWarningsFlag2 "/Wall")
  else()
    set(DisableWarningsFlag "-w")
    set(SearchWarningsFlag1 "-[+W?]pedantic")
    set(SearchWarningsFlag2 "-Wall")
  endif()
  foreach(temp_flag
          CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
          CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO CMAKE_C_FLAGS)
     if(${temp_flag} MATCHES "${SearchWarningsFlag1}")
        string(REGEX REPLACE "${SearchWarningsFlag1}" "${DisableWarningsFlag}" ${temp_flag} "${${temp_flag}}")
     elseif(${temp_flag} MATCHES "${SearchWarningsFlag2}")
        string(REGEX REPLACE "${SearchWarningsFlag2}" "${DisableWarningsFlag}" ${temp_flag} "${${temp_flag}}")
     else()
        set(${temp_flag} "${${temp_flag}} ${DisableWarningsFlag}")
     endif()
  endforeach()
ENDMACRO()

# Remove duplicate entries in default flags. (occur when after a second make or configure)
RemoveDuplicateSubstring("${CMAKE_CXX_FLAGS}" CMAKE_CXX_FLAGS)

include(cmake/common.cmake)

# Set RPATH-handing (CMake parameters)
set(CMAKE_SKIP_BUILD_RPATH FALSE)
set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
set(CMAKE_INSTALL_RPATH ${LIBS_DIR})
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)

if(MSVC)
  # Turn on the ability to create folders to organize projects (.vcproj)
  # It creates "CMakePredefinedTargets" folder by default and adds CMake
  # defined projects like INSTALL.vcproj and ZERO_CHECK.vcproj
  set_property(GLOBAL PROPERTY USE_FOLDERS ON)
endif()

# set default buildoptions and print them
include(cmake/options.cmake)

# Force out-of-source build
if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
  message(FATAL_ERROR
    "This project requires an out of source build. Remove the file 'CMakeCache.txt' found in this directory before continuing, create a separate build directory and run 'cmake [options] <srcs>' from there."
  )
endif()

# TODO: allow other compilers under windows in the future
if(WIN32 AND NOT MSVC AND NOT MINGW)
  message(FATAL_ERROR "Only MSVC++ and MinGW toolchains are supported on Windows at the moment.")
endif()

include(CheckPlatform)

# TODO: use MSVC_CXX_ARCHITECTURE_ID instead to identify platform on windows (not required on other systems)
# find platform: required to build 3rd party libraries w/o CMake files
# Find out what system we use to include the needed libs
if(WIN32)
  if(PLATFORM MATCHES X86) # 32-bit
    set(DEP_ARCH Win32)
  else() # 64-bit
    set(DEP_ARCH x64)
  endif()
endif()

# Override configuration-types - we don't use anything else than debug and release
if(CMAKE_CONFIGURATION_TYPES)
  set(CMAKE_CONFIGURATION_TYPES "Release;Debug;RelWithDebInfo;MinSizeRel" CACHE STRING "Reset the configurations to what we need" FORCE)
else()
  if(NOT CMAKE_BUILD_TYPE)
    if (NOT DEBUG)
      message("Defaulting to release build.")
      set(CMAKE_BUILD_TYPE Release CACHE STRING "" FORCE)
    else()
      set(CMAKE_BUILD_TYPE Debug CACHE STRING "" FORCE)
    endif()
  endif()
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY HELPSTRING "Choose the type of build")
  # set the valid options for cmake-gui drop-down list
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug;Release;RelWithDebInfo;MinSizeRel")
endif()

# find Git: used to get the revision number
find_package(Git)

if(NOT MSVC AND PCH)
  # Include cotire to manage PCH support
  include(cotire)
endif()

set(BIN_FOLDER_NAME bin)
set(CONF_FOLDER_NAME etc)
set(LIBS_FOLDER_NAME lib)

# Set Install folders
set(BIN_DIR ${CMAKE_INSTALL_PREFIX}/${BIN_FOLDER_NAME})
set(CONF_DIR ${CMAKE_INSTALL_PREFIX}/${CONF_FOLDER_NAME})
set(LIBS_DIR ${CMAKE_INSTALL_PREFIX}/${LIBS_FOLDER_NAME})

# On windows define more development folders and install provided libs
if(WIN32)
  set(BIN_DIR ${CMAKE_INSTALL_PREFIX})
  set(LIBS_DIR ${BIN_DIR})
  set(CONF_DIR ${BIN_DIR})
  get_property(IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG) # ninja generator does not support $(Configuration)
  if(MSVC AND "$ENV{CLION_IDE}" STREQUAL "" AND IS_MULTI_CONFIG)
    set(DEV_BIN_DIR ${DEV_BINARY_DIR}/${BIN_FOLDER_NAME}/${DEP_ARCH}_$(Configuration))
    set(DEV_PROVIDED_LIBS_FOLDER ${CMAKE_SOURCE_DIR}/dep/lib/${DEP_ARCH}_$(Configuration))
  else()
    set(DEV_BIN_DIR ${DEV_BINARY_DIR}/${BIN_FOLDER_NAME}/${DEP_ARCH}_${CMAKE_BUILD_TYPE})
    set(DEV_PROVIDED_LIBS_FOLDER ${CMAKE_SOURCE_DIR}/dep/lib/${DEP_ARCH}_${CMAKE_BUILD_TYPE})
  endif()

  # Define install rules for provided libs
  set(BIN_LIBS ${DEV_PROVIDED_LIBS_FOLDER}/libmysql.dll)
  if(PLATFORM MATCHES X86)
    if(MSVC)
      # Only MSVC. TODO:: check why x64 is not provided
      set(BIN_LIBS ${BIN_LIBS} ${DEV_PROVIDED_LIBS_FOLDER}/dbghelp.dll)
    endif()
    set(BIN_LIBS ${BIN_LIBS} ${DEV_PROVIDED_LIBS_FOLDER}/libcrypto-3.dll)
    set(BIN_LIBS ${BIN_LIBS} ${DEV_PROVIDED_LIBS_FOLDER}/legacy.dll)
  else()
    set(BIN_LIBS ${BIN_LIBS} ${DEV_PROVIDED_LIBS_FOLDER}/libcrypto-3-x64.dll)
    set(BIN_LIBS ${BIN_LIBS} ${DEV_PROVIDED_LIBS_FOLDER}/legacy.dll)
  endif()
  install(FILES
      ${BIN_LIBS}
    DESTINATION ${LIBS_DIR}
  )
endif()

# For Unix systems set the rpath so that libraries are found
set(CMAKE_INSTALL_RPATH ../${LIBS_FOLDER_NAME})
set(CMAKE_INSTALL_NAME_DIR ${LIBS_DIR})

# Add alternate lib dir for boost on windows
if(WIN32 AND NOT "$ENV{BOOST_ROOT}" STREQUAL "")
  set(BOOST_LIBRARYDIR "$ENV{BOOST_LIBRARYDIR}")
  set(BOOST_LIBRARYDIR "${BOOST_LIBRARYDIR};$ENV{BOOST_ROOT}\\lib\\${DEP_ARCH}")
  set(BOOST_LIBRARYDIR "${BOOST_LIBRARYDIR};$ENV{BOOST_ROOT}\\stage\\${DEP_ARCH}")
  set(BOOST_LIBRARYDIR "${BOOST_LIBRARYDIR};$ENV{BOOST_ROOT}\\stage")
endif()

# Be sure to search only static lib
add_definitions(-DBOOST_ALL_NO_LIB)
set(Boost_USE_STATIC_LIBS ON)
set(Boost_NO_BOOST_CMAKE ON)   # should fix build for boost 1.71
#set(Boost_DEBUG ON)

if(MSVC)
  # Use at least verion 3.8.1 of FindBoost to fix some issues. Especialy in MSVC with fixed Toolset issues.
  # This is a workaround while VisualStudio does not embed higher cmake version than 3.7.2
  if(${CMAKE_VERSION} VERSION_LESS "3.11.3")
    list(APPEND CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake/macros/FindBoost")
    message(STATUS "FindBoost: included version 3.11.3 of FindBoost is used.")
  endif()
endif()

# In our case use new way to treat BOOST_ROOT environement variable
if (POLICY CMP0074)
  cmake_policy(SET CMP0074 NEW)
endif()

# Find needed packages and if necessery abort if something important is missing
find_package(Boost REQUIRED COMPONENTS system program_options thread regex serialization filesystem)

if(NOT Boost_FOUND AND (BUILD_GAME_SERVER OR BUILD_LOGIN_SERVER))
  message(STATUS "BOOST_ROOT = $ENV{BOOST_ROOT}")
  message(STATUS "BOOST_LIBRARYDIR = $ENV{BOOST_LIBRARYDIR}")
  if ("$ENV{BOOST_ROOT}" STREQUAL "")
    message(WARNING "BOOST_ROOT is not set, please set it correctly to your boost folder.")
  else()
    if ("$ENV{BOOST_LIBRARYDIR}" STREQUAL "")
        message(STATUS "Please put all ${DEP_ARCH} boost lib files in $ENV{BOOST_ROOT}\\lib\\${DEP_ARCH} folder")
        message(STATUS "Or set BOOST_LIBRARYDIR to your boost lib folder.")
    else()
        message(STATUS "BOOST_LIBRARYDIR is set, please verify if correct libs files are in that folder.")
    endif()
  endif()
  message(FATAL_ERROR "This project requires boost.  Please install from http://www.boost.org")
endif()

# Win32 delivered packages
if(WIN32 AND (BUILD_GAME_SERVER OR BUILD_LOGIN_SERVER OR BUILD_EXTRACTORS))
  set(MYSQL_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/dep/lib/include/mysql")
  set(MYSQL_LIBRARY "${CMAKE_SOURCE_DIR}/dep/lib/${DEP_ARCH}_release/libmysql.lib")
  set(MYSQL_DEBUG_LIBRARY "${CMAKE_SOURCE_DIR}/dep/lib/${DEP_ARCH}_debug/libmysql.lib")
  set(OPENSSL_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/dep/lib/include")
  set(OPENSSL_LIBRARIES
     "${CMAKE_SOURCE_DIR}/dep/lib/${DEP_ARCH}_release/libcrypto.lib"
     "${CMAKE_SOURCE_DIR}/dep/lib/${DEP_ARCH}_release/libssl.lib"
     "${CMAKE_SOURCE_DIR}/dep/lib/${DEP_ARCH}_release/legacy.lib"
  )
  set(OPENSSL_DEBUG_LIBRARIES
     "${CMAKE_SOURCE_DIR}/dep/lib/${DEP_ARCH}_debug/libcrypto.lib"
     "${CMAKE_SOURCE_DIR}/dep/lib/${DEP_ARCH}_debug/libssl.lib"
     "${CMAKE_SOURCE_DIR}/dep/lib/${DEP_ARCH}_debug/legacy.lib"
  )
endif()

# *nix-specific packages
if(UNIX AND (BUILD_GAME_SERVER OR BUILD_LOGIN_SERVER OR BUILD_EXTRACTORS))
  if(POSTGRESQL)
    find_package(PostgreSQL REQUIRED)
  elseif(SQLITE)
    find_package(SQLite3 REQUIRED)
  else()
    find_package(MySQL REQUIRED)
  endif()

  find_package(OpenSSL REQUIRED)

  message(STATUS "Found OpenSSL libraries: ${OPENSSL_LIBRARIES}")
  if(OPENSSL_VERSION VERSION_LESS 3.0)
    message(SEND_ERROR "OpenSSL: This project requires OpenSSL version 3.0 or higher")
  endif()
  if(OPENSSL_VERSION VERSION_GREATER 3.0 AND OPENSSL_VERSION VERSION_LESS 3.0.14)
    message(WARNING "OpenSSL: Your OpenSSL version is critically vulnerable or no longer being maintained, consider upgrading")
  endif()
endif()

if(BUILD_EXTRACTORS)
  find_package(BZip2 QUIET)
  if(NOT (BZip2_FOUND OR BZIP2_FOUND))
    # use provided source code
    set(BZIP2_LIBRARIES "bzip2")
    message(STATUS "Could not find BZIP2 on your system. The provided sources will be used.")
  endif()
endif()

# Find core revision
if(GIT_EXECUTABLE)
  execute_process(
    COMMAND ${GIT_EXECUTABLE} rev-parse HEAD
    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
    OUTPUT_VARIABLE REVISION_ID
    RESULT_VARIABLE GIT_RESULT
    ERROR_QUIET
    OUTPUT_STRIP_TRAILING_WHITESPACE
  )
  if(GIT_RESULT)
    set(REVISION_ID "Git repository not found")
    set(REVISION_DATE "\"0000-00-00T00:00:00+00:00\"")
  else()
    execute_process(
      COMMAND ${GIT_EXECUTABLE} show --quiet --date=iso-strict --format="%ad" ${REVISION_ID}
      WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
      OUTPUT_VARIABLE REVISION_DATE
      RESULT_VARIABLE GIT_RESULT
      ERROR_QUIET
      OUTPUT_STRIP_TRAILING_WHITESPACE
    )
    if(GIT_RESULT)
      set(REVISION_DATE "\"0000-00-00T00:00:00+00:00\"")
    endif()
  endif()
else()
  set(REVISION_ID "Git not found")
  set(REVISION_DATE "\"0000-00-00T00:00:00+00:00\"")
endif()

configure_file(
  ${CMAKE_SOURCE_DIR}/src/shared/revision.h.in
  ${CMAKE_BINARY_DIR}/src/shared/revision.h
  @ONLY
)

set(DEFINITIONS_RELEASE NDEBUG)
set(DEFINITIONS_RELWITHDEBINFO NDEBUG _RELWITHDEBINFO MANGOS_RELWITHDEBINFO)
set(DEFINITIONS_MINSIZEREL NDEBUG _MINSIZEREL MANGOS_MINSIZEREL)
set(DEFINITIONS_DEBUG _DEBUG MANGOS_DEBUG)

if(NOT BUILD_GAME_SERVER AND BUILD_SCRIPTDEV)
  set(BUILD_SCRIPTDEV OFF)
  message(STATUS "BUILD_SCRIPTDEV forced to OFF due to BUILD_GAME_SERVER is not set")
endif()

if(NOT BUILD_GAME_SERVER AND BUILD_DEPRECATED_PLAYERBOT)
  set(BUILD_DEPRECATED_PLAYERBOT OFF)
  message(STATUS "BUILD_DEPRECATED_PLAYERBOT forced to OFF due to BUILD_GAME_SERVER is not set")
endif()

if(BUILD_PLAYERBOTS)
  if(BUILD_DEPRECATED_PLAYERBOT)
    set(BUILD_DEPRECATED_PLAYERBOT OFF)
    message(STATUS "BUILD_DEPRECATED_PLAYERBOT forced to OFF because BUILD_PLAYERBOTS is set")
  endif()

  if(NOT BUILD_GAME_SERVER)
    set(BUILD_PLAYERBOTS OFF)
    message(STATUS "BUILD_PLAYERBOTS forced to OFF due to BUILD_GAME_SERVER is not set")
  endif()
endif()

if(PCH)
  if(${CMAKE_VERSION} VERSION_LESS "3.16")
    message("PCH is not supported by your CMake version")
    message("Please consider to switch to CMake 3.16")
    message("PCH is forced to OFF")
    set(PCH OFF)
  endif()
endif()

# print out the results before continuing
include(cmake/showoptions.cmake)

if(NOT BUILD_GAME_SERVER AND NOT BUILD_LOGIN_SERVER AND NOT BUILD_EXTRACTORS AND NOT BUILD_DOCS AND NOT BUILD_RECASTDEMOMOD)
  message(FATAL_ERROR "You must select something to build!")
endif()

if(XCODE)
  if(PLATFORM MATCHES X86)
    set(CMAKE_OSX_ARCHITECTURES i386)
  else()
    set(CMAKE_OSX_ARCHITECTURES x86_64)
  endif()
endif()

add_subdirectory(dep)

# Add definitions for all build types
# Don't place this above 'dep' subdirectory! Because of defines build will crash.
set(DEFINITIONS "")

if(POSTGRESQL)
  set(DEFINITIONS ${DEFINITIONS} DO_POSTGRESQL)
elseif(SQLITE)
  set(DEFINITIONS ${DEFINITIONS} DO_SQLITE)
else()
  set(DEFINITIONS ${DEFINITIONS} DO_MYSQL)
endif()

if(CMAKE_BUILD_TYPE STREQUAL "Debug")
  set_directory_properties(PROPERTIES COMPILE_DEFINITIONS "${DEFINITIONS};${DEFINITIONS_DEBUG}")
elseif(CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
  set_directory_properties(PROPERTIES COMPILE_DEFINITIONS "${DEFINITIONS};${DEFINITIONS_RELWITHDEBINFO}")
elseif(CMAKE_BUILD_TYPE STREQUAL "MinSizeRel")
  set_directory_properties(PROPERTIES COMPILE_DEFINITIONS "${DEFINITIONS};${DEFINITIONS_MINSIZEREL}")
else()
  set_directory_properties(PROPERTIES COMPILE_DEFINITIONS "${DEFINITIONS};${DEFINITIONS_RELEASE}")
endif()

if(UNIX)
  add_compile_definitions(SYSCONFDIR="../${CONF_FOLDER_NAME}/")
endif()

if(BUILD_GAME_SERVER OR BUILD_LOGIN_SERVER OR BUILD_EXTRACTORS)
  add_subdirectory(src)
endif()

if(BUILD_EXTRACTORS)
  if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm")
  set(BUILD_EXTRACTORS, OFF)
  message(STATUS "BUILD_EXTRACTORS forced to OFF.  Not supported on ARM architecture")
  else()
    add_subdirectory(contrib/extractor)
    add_subdirectory(contrib/vmap_extractor)
    add_subdirectory(contrib/vmap_assembler)
    add_subdirectory(contrib/mmap)
  endif()
endif()

if(BUILD_DOCS)
  add_subdirectory(doc)
endif()

if(BUILD_RECASTDEMOMOD)
  if (WIN32)
    if (NOT BUILD_EXTRACTORS)
      add_subdirectory(contrib/mmap)
    endif()
    add_subdirectory(contrib/recastdemomod)
  else()
    message(STATUS "BUILD_RECASTDEMOMOD forced to OFF. Not supported on non windows system.")
  endif()
endif()

if(BUILD_GIT_ID)
  add_subdirectory(contrib/git_id)
endif()

# set default startup project
if(MSVC)
  if(BUILD_GAME_SERVER)
    set_property(DIRECTORY ${CMAKE_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT ${CMANGOS_BINARY_SERVER_NAME})
  elseif(BUILD_LOGIN_SERVER)
    set_property(DIRECTORY ${CMAKE_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT ${CMANGOS_BINARY_REALMD_NAME})
  elseif(BUILD_RECASTDEMOMOD)
    set_property(DIRECTORY ${CMAKE_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT "RecastDemoMod")
  endif()
endif()

# if(SQL)
#   add_subdirectory(sql)
# endif()