#       _________ __                 __
#      /   _____//  |_____________ _/  |______     ____  __ __  ______
#      \_____  \\   __\_  __ \__  \\   __\__  \   / ___\|  |  \/  ___/
#      /        \|  |  |  | \// __ \|  |  / __ \_/ /_/  >  |  /\___ |
#     /_______  /|__|  |__|  (____  /__| (____  /\___  /|____//____  >
#             \/                  \/          \//_____/            \/
#  ______________________                           ______________________
#                        T H E   W A R   B E G I N S
#         Stratagus - A free fantasy real time strategy game engine
#
#    CMakeLists.txt
#    Copyright (C) 2011-2016  Pali Rohár <pali.rohar@gmail.com>
#                             cybermind <cybermindid@gmail.com>
#
#    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, see <http://www.gnu.org/licenses/>.
#
#

project(wargus)
cmake_minimum_required(VERSION 3.10)
cmake_policy(VERSION 3.10..3.20.2)
set(WARGUS_VERSION 2.4.1)

set(CMAKE_CXX_STANDARD 17)

if(EXISTS ${WIN32_CMAKE_PREFIX_PATH})
	list(APPEND CMAKE_PREFIX_PATH "${WIN32_CMAKE_PREFIX_PATH}")
	message("Using prefix path ${CMAKE_PREFIX_PATH}")
endif()

if(EXISTS "${CMAKE_CURRENT_LIST_DIR}/third-party/CMakeLists.txt")
  add_subdirectory(third-party)
else()
  message(WARNING "Third-party directory not populated, cannot vendor any dependencies.")
endif()

option(ENABLE_VENDORED_LIBS OFF)

# Wargus sources

set(pudconvert_SRCS
	pud.cpp
	pudconvert.cpp
)

set(pudconvert_HDRS
	endian.h
	pud.h
)

set(wartool_SRCS
	pud.cpp
	wartool.cpp
	xmi2mid.cpp
)

set(wartool_HDRS
	wartool.h
	endian.h
	pud.h
	xmi2mid.h
)

set(wargus_SRCS
	wargus.cpp
)

if(WIN32)
	set(wargus_SRCS
		${wargus_SRCS}
		wargus.rc
	)
	set(wartool_SRCS
		${wartool_SRCS}
		rip_music_win32.cpp
	)
else()
	set(wartool_SRCS
		${wartool_SRCS}
		rip_music_unix.cpp
	)
endif()

set(warextract_SRCS
	warextract.c
)

# Find all libraries

option(ENABLE_STATIC "Compile Wargus binaries as static executable" OFF)

if(ENABLE_STATIC)
	set(CMAKE_FIND_LIBRARY_SUFFIXES ".lib;.a")
endif()

set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH})

find_package(Stratagus REQUIRED)
if(ENABLE_VENDORED_LIBS)
  vendored_png()
  vendored_zlib()
  vendored_bzip2()
  set(STORMLIB_FOUND false)
else()
  find_package(PNG REQUIRED)
  find_package(ZLIB REQUIRED)
  find_package(StormLib)
endif()

if(WIN32)
	find_package(MakeNSIS)
endif()

find_package(SelfPackers)

# Windows RC compiler definitions

if(WIN32)
	enable_language(RC)
	include(CMakeDetermineRCCompiler)

	if(MINGW)
		set(CMAKE_RC_COMPILER_INIT windres)
		set(CMAKE_RC_COMPILE_OBJECT "<CMAKE_RC_COMPILER> <FLAGS> -O coff <DEFINES> -i <SOURCE> -o <OBJECT>")
	endif()
endif()

# Options for compiling

if(WIN32)
	option(ENABLE_NSIS "Create Stratagus Window NSIS Installer" OFF)
endif()

option(ENABLE_UPX "Compress Stratagus executable binary with UPX packer" OFF)
option(ENABLE_STRIP "Strip all symbols from executables" OFF)

option(WITH_STORMLIB "Compile wartool with StormLib support" ON)

# Install paths
set(BINDIR "bin" CACHE PATH "Where to install user binaries")
if(NOT DEFINED GAMEDIR)
	set(GAMEDIR "games" CACHE PATH "Where to install games binaries")
endif()
set(SHAREDIR "share/games/stratagus/wargus" CACHE PATH "Where to install data files")
set(DATAROOTDIR "${CMAKE_INSTALL_PREFIX}/share" CACHE PATH "Sets the root of data directories to a non-default location")
set(ICONDIR "${DATAROOTDIR}/pixmaps" CACHE PATH "Sets the icon directory for desktop entry to a non-default location.")
set(DESKTOPDIR "${DATAROOTDIR}/applications" CACHE PATH "Sets the desktop file directory for desktop entry to a non-default location.")

if(NOT DEFINED GAMEDIRABS)
	if(NOT IS_ABSOLUTE "${GAMEDIR}")
		set(GAMEDIRABS "${CMAKE_INSTALL_PREFIX}/${GAMEDIR}/")
	else()
		set(GAMEDIRABS "${GAMEDIR}/")
	endif()
endif()

# Wargus definitions

add_definitions(${PNG_DEFINITIONS})
include_directories(${PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIRS} ${STRATAGUS_INCLUDE_DIR})
set(pudconvert_LIBS ${pudconvert_LIBS} ${ZLIB_LIBRARIES})
set(wartool_LIBS ${pudconvert_LIBS} ${PNG_LIBRARIES} ${ZLIB_LIBRARIES})

# Platform definitions

if(WIN32 AND MSVC)
	add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE=1)
endif()

include(CheckCXXSourceCompiles)

set(FS_SRC "
#include <filesystem>
namespace fs = std::filesystem;
int main() {
	fs::path p = fs::path(\".\");
	if (fs::absolute(p).is_absolute()) {
		return 0;
	} else {
		return 1;
	}
}
")
check_cxx_source_compiles("${FS_SRC}" HAS_17_FS)

if(NOT HAS_17_FS) # Tr
	set(EXPERIMENTAL_FS_SRC "
	#include <experimental/filesystem>
	namespace fs = std::experimental::filesystem;
	int main() {
		fs::path p = fs::path(\".\");
		if (fs::absolute(p).is_absolute()) {
			return 0;
		} else {
			return 1;
		}
	}
	")
	check_cxx_source_compiles("${EXPERIMENTAL_FS_SRC}" HAS_17_EXPERIMENTAL_FS)
	if(NOT HAS_17_EXPERIMENTAL_FS)
		set(CMAKE_REQUIRED_LIBRARIES stdc++fs)
		check_cxx_source_compiles("${EXPERIMENTAL_FS_SRC}" HAS_EXP_17_FS_WITH_STDC)
		if(HAS_EXP_17_FS_WITH_STDC)
			set(wargus_LIBS ${wargus_LIBS} stdc++fs)
			set(wartool_LIBS ${wartool_LIBS} stdc++fs)
		else()
			set(CMAKE_REQUIRED_LIBRARIES c++fs)
			check_cxx_source_compiles("${EXPERIMENTAL_FS_SRC}" HAS_EXP_17_FS_WITH_CLIB)
			if(HAS_EXP_17_FS_WITH_CLIB)
				set(wargus_LIBS ${wargus_LIBS} c++fs)
				set(wartool_LIBS ${wartool_LIBS} c++fs)
			else()
				message(FATAL_ERROR "I don't know how to compile with C++17 filesystem support on your system")
			endif()
		endif()
	endif()
endif()

if(NOT WIN32)
	include_directories(${X11_INCLUDE_DIR} ${GTK2_INCLUDE_DIRS})
	set(wargus_LIBS ${wargus_LIBS} ${X11_X11_LIB} ${GTK2_LIBRARIES})
endif()

if (NOT WIN32)
	if(NOT DEFINED DATA_PATH)
		if(NOT IS_ABSOLUTE "${SHAREDIR}")
			set(DATA_PATH "${CMAKE_INSTALL_PREFIX}/${SHAREDIR}")
		else()
			set(DATA_PATH "${SHAREDIR}")
		endif()
	endif()
	add_definitions(-DDATA_PATH="${DATA_PATH}")
	add_definitions(-DSCRIPTS_PATH="${DATA_PATH}")
	add_definitions(-DSTRATAGUS_BIN="${STRATAGUS}")
endif()

if(ENABLE_STRIP)
	set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s")
endif()

# For now, doesn't compile on OS X with StormLib
if (WITH_STORMLIB)
	if (NOT STORMLIB_FOUND)
		set(BUILD_STORMLIB true)
		include(ExternalProject)
		message(STATUS "Will build StormLib as part of compilation.")
                if(ENABLE_VENDORED_LIBS)
                  set(
                    STORM_CMAKE_CACHE_ARGS
                    -DZLIB_FOUND:STRING=1 -DZLIB_INCLUDE_DIR:PATH=${ZLIB_INCLUDE_DIR} -DZLIB_LIBRARY:FILEPATH=${ZLIB_LIBRARIES}
                    -DBZIP2_FOUND:STRING=1 -DBZIP2_INCLUDE_DIR:PATH=${BZIP2_INCLUDE_DIR} -DBZIP2_LIBRARIES:FILEPATH=${BZIP2_LIBRARIES}
                  )
                endif()
		ExternalProject_Add(StormLib 
		  PREFIX "${CMAKE_CURRENT_BINARY_DIR}/StormLib/"
		  SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/StormLib/"
		  INSTALL_DIR "${CMAKE_CURRENT_BINARY_DIR}/StormLib/"
		  CMAKE_ARGS -DSTORM_SKIP_INSTALL=ON
                  CMAKE_CACHE_ARGS ${STORM_CMAKE_CACHE_ARGS}
		  INSTALL_COMMAND ""
		)
		set(STORMLIB_FOUND true)
		set(STORMLIB_INCLUDE_DIR ${CMAKE_CURRENT_LIST_DIR}/StormLib/src)
                if(MSVC)
                  set(STORMLIB_LIBRARY "${CMAKE_CURRENT_BINARY_DIR}/StormLib/src/StormLib-build/$<CONFIGURATION>/storm.lib")
                else()
		  set(STORMLIB_LIBRARY "${CMAKE_CURRENT_BINARY_DIR}/StormLib/src/StormLib-build/libstorm.a")
                endif()
	endif()

	if (STORMLIB_FOUND)
		add_definitions(-DUSE_STORMLIB -D__STORMLIB_SELF__)
		include_directories(${STORMLIB_INCLUDE_DIR})
		set(wartool_LIBS ${wartool_LIBS} ${STORMLIB_LIBRARY} ${BZIP2_LIBRARIES})
	endif()
endif()

# Compile Wargus

add_executable(pudconvert ${pudconvert_SRCS} ${pudconvert_HDRS})
target_link_libraries(pudconvert ${pudconvert_LIBS})

add_executable(wargus WIN32 ${wargus_SRCS} ${wargus_HDRS})
target_link_libraries(wargus ${wargus_LIBS})

add_executable(wartool ${wartool_SRCS} ${wartool_HDRS})
target_link_libraries(wartool ${wartool_LIBS})

if(BUILD_STORMLIB)
	add_dependencies(wargus StormLib)
	add_dependencies(wartool StormLib)
	add_dependencies(pudconvert StormLib)
endif()

if(ENABLE_VENDORED_LIBS)
  add_dependencies(wargus png zlib)
  add_dependencies(wartool png zlib)
  add_dependencies(pudconvert png zlib)
endif()

if(WIN32 AND MINGW AND ENABLE_STATIC)
	set_target_properties(pudconvert PROPERTIES LINK_FLAGS "${LINK_FLAGS} -static-libgcc -static-libstdc++")
	set_target_properties(wargus PROPERTIES LINK_FLAGS "${LINK_FLAGS} -static-libgcc -static-libstdc++")
	set_target_properties(wartool PROPERTIES LINK_FLAGS "${LINK_FLAGS} -static-libgcc -static-libstdc++")
endif()

########### next target ###############

macro(self_packer PACKER_TARGET)
	get_target_property(PACKER_NAME ${PACKER_TARGET} OUTPUT_NAME)
	if(NOT PACKER_NAME)
		set(PACKER_NAME ${PACKER_TARGET})
	endif()
	add_custom_command(TARGET ${PACKER_TARGET} POST_BUILD
		COMMAND ${SELF_PACKER_FOR_EXECUTABLE}
		ARGS ${SELF_PACKER_FOR_EXECUTABLE_FLAGS} ${PACKER_NAME}${CMAKE_EXECUTABLE_SUFFIX}
	)
endmacro()

if(ENABLE_UPX AND SELF_PACKER_FOR_EXECUTABLE)
	self_packer(pudconvert)
	self_packer(wargus)
	self_packer(wartool)
endif()

########### next target ###############

if(WIN32 AND ENABLE_NSIS AND MAKENSIS_FOUND)
	file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/COPYING DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
	file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/COPYING-3rd DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
	file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/wargus.ico DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
	add_custom_command(OUTPUT Wargus-${WARGUS_VERSION}${MAKENSIS_SUFFIX}
		COMMAND ${MAKENSIS} ${MAKENSIS_FLAGS} -DPORTABLE=1 -DCMAKE_CURRENT_SOURCE_DIR="${CMAKE_CURRENT_SOURCE_DIR}" -DCMAKE_CURRENT_BINARY_DIR="${CMAKE_CURRENT_BINARY_DIR}" ${CMAKE_CURRENT_SOURCE_DIR}/wargus.nsi
		COMMAND ${MAKENSIS} ${MAKENSIS_FLAGS} -DCMAKE_CURRENT_SOURCE_DIR="${CMAKE_CURRENT_SOURCE_DIR}" -DCMAKE_CURRENT_BINARY_DIR="${CMAKE_CURRENT_BINARY_DIR}" ${CMAKE_CURRENT_SOURCE_DIR}/wargus.nsi
		DEPENDS wargus.nsi pudconvert wargus wartool COPYING COPYING-3rd wargus.ico
		COMMENT "Generating Wargus Windows NSIS Installers" VERBATIM
	)
	add_custom_target(nsis ALL DEPENDS Wargus-${WARGUS_VERSION}${MAKENSIS_SUFFIX})
endif()

if (WIN32 AND MSVC)
	set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
	set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
	set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS}")
	add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE=1)
	set_target_properties(pudconvert PROPERTIES LINK_FLAGS "${LINK_FLAGS}")
	set_target_properties(wartool PROPERTIES LINK_FLAGS "${LINK_FLAGS}")
endif()

########### next target ###############

configure_file (
	"${PROJECT_SOURCE_DIR}/wargus.desktop.in"
	"${PROJECT_BINARY_DIR}/wargus.desktop"
)

########### install files ###############

install(TARGETS wargus DESTINATION ${GAMEDIR})
install(TARGETS pudconvert wartool DESTINATION ${BINDIR})
install(FILES wargus.png DESTINATION ${ICONDIR})
install(FILES "${PROJECT_BINARY_DIR}/wargus.desktop" DESTINATION ${DESKTOPDIR})

install(DIRECTORY shaders contrib campaigns maps scripts DESTINATION ${SHAREDIR})
install(FILES contrib/red_cross.png DESTINATION ${SHAREDIR}/graphics/missiles)
install(FILES contrib/cross.png DESTINATION ${SHAREDIR}/graphics/ui/cursors)
install(FILES contrib/black_title.png contrib/food.png contrib/health.png contrib/health2.png contrib/mana.png contrib/mana2.png contrib/ore,stone,coal.png contrib/score.png DESTINATION ${SHAREDIR}/graphics/ui)

# uninstall target
if(NOT TARGET uninstall)
    configure_file(
        "${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
        "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
        IMMEDIATE @ONLY)

    add_custom_target(uninstall
        COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
endif()