project(ethereum)
cmake_minimum_required(VERSION 2.8.9)

set(CMAKE_AUTOMOC ON)

cmake_policy(SET CMP0015 NEW)

# Default HEADLESS to 0.
set(HEADLESS CACHE BOOL 0)
if ("x${HEADLESS}" STREQUAL "x")
	set(HEADLESS 0)
endif ()

# Default TARGET_PLATFORM to "linux".
set(TARGET_PLATFORM CACHE STRING "linux")
if ("x${TARGET_PLATFORM}" STREQUAL "x")
	set(TARGET_PLATFORM "linux")
endif ()

if ("${TARGET_PLATFORM}" STREQUAL "w64")
	set(CMAKE_SYSTEM_NAME Windows)

	set(CMAKE_CXX_LIBRARY_ARCHITECTURE	x86_64-w64-mingw32)
	set(CMAKE_C_COMPILER			x86_64-w64-mingw32-gcc)
	set(CMAKE_CXX_COMPILER			x86_64-w64-mingw32-g++)
	set(CMAKE_RC_COMPILER			x86_64-w64-mingw32-windres)
	set(CMAKE_AR				x86_64-w64-mingw32-ar)
	set(CMAKE_RANLIB			x86_64-w64-mingw32-ranlib)

	set(CMAKE_EXECUTABLE_SUFFIX		.exe)

	set(CMAKE_FIND_ROOT_PATH
		/usr/x86_64-w64-mingw32
	)

	include_directories(/usr/x86_64-w64-mingw32/include/cryptopp)

	set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
	set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
	set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

	set(CMAKE_INSTALL_PREFIX	/usr/x86_64-w64-mingw32)
	set(ETH_BUILD_PLATFORM "windows")
else ()
	set(ETH_BUILD_PLATFORM ${CMAKE_SYSTEM_NAME})
endif()

if (CMAKE_COMPILER_IS_MINGW)
	set(ETH_BUILD_PLATFORM "${ETH_BUILD_PLATFORM}/mingw")
elseif (CMAKE_COMPILER_IS_MSYS)
	set(ETH_BUILD_PLATFORM "${ETH_BUILD_PLATFORM}/msys")
elseif (CMAKE_COMPILER_IS_GNUCXX)
	set(ETH_BUILD_PLATFORM "${ETH_BUILD_PLATFORM}/g++")
elseif (CMAKE_COMPILER_IS_MSVC)
	set(ETH_BUILD_PLATFORM "${ETH_BUILD_PLATFORM}/msvc")
else ()
	set(ETH_BUILD_PLATFORM "${ETH_BUILD_PLATFORM}/unknown")
endif ()

# Initialize CXXFLAGS.
set(CMAKE_CXX_FLAGS                "-Wall -std=c++11")
set(CMAKE_CXX_FLAGS_DEBUG          "-O0 -g")
set(CMAKE_CXX_FLAGS_MINSIZEREL     "-Os -DNDEBUG")
set(CMAKE_CXX_FLAGS_RELEASE        "-O4 -DNDEBUG")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g")

#add_definitions("-DETH_BUILD_TYPE=${ETH_BUILD_TYPE}")
#add_definitions("-DETH_BUILD_PLATFORM=${ETH_BUILD_PLATFORM}")

# Compiler-specific C++11 activation.
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
	execute_process(
		COMMAND ${CMAKE_CXX_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
	if (NOT (GCC_VERSION VERSION_GREATER 4.7 OR GCC_VERSION VERSION_EQUAL 4.7))
		message(FATAL_ERROR "${PROJECT_NAME} requires g++ 4.7 or greater.")
	endif ()
elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
else ()
	message(FATAL_ERROR "Your C++ compiler does not support C++11.")
endif ()

if (${TARGET_PLATFORM} STREQUAL "w64")
else ()
    # Look for available Crypto++ version and if it is >= 5.6.2
    find_path(ID cryptlib.h
        /usr/include/cryptopp
        /usr/include/crypto++
        /usr/local/include/cryptopp
        /usr/local/include/crypto++
        /opt/local/include/cryptopp
        /opt/local/include/crypto++
        )
    find_library(LS NAMES cryptoppeth cryptopp
        PATHS
        /usr/lib
        /usr/local/lib
        /opt/local/lib
        )

    if(ID AND LS)
        message(STATUS "Found Crypto++: ${ID}, ${LS}")
        set(_CRYPTOPP_VERSION_HEADER ${ID}/config.h)
        if(EXISTS ${_CRYPTOPP_VERSION_HEADER})
            file(STRINGS ${_CRYPTOPP_VERSION_HEADER} _CRYPTOPP_VERSION REGEX "^#define CRYPTOPP_VERSION[ \t]+[0-9]+$")
            string(REGEX REPLACE "^#define CRYPTOPP_VERSION[ \t]+([0-9]+)" "\\1" _CRYPTOPP_VERSION ${_CRYPTOPP_VERSION})
            if(${_CRYPTOPP_VERSION} LESS 562)
                message(STATUS "System Crypto++ version found is smaller than 5.6.2.")
            else()
                set(CRYPTOPP_INCLUDE_DIR ${ID} CACHE FILEPATH "" FORCE)
                set(CRYPTOPP_LIBRARIES ${LS} CACHE FILEPATH "" FORCE)
                set(CRYPTOPP_FOUND TRUE)
                message(STATUS "System Crypto++ found and version greater or equal to 5.6.2")
            endif()
        endif()
    endif()

    if(NOT CRYPTOPP_FOUND)
        set(CRYPTOPP_INCLUDE_DIR "../cryptopp562" CACHE FILEPATH "" FORCE)
        find_library(LSLOC NAMES cryptoppeth cryptopp
            PATHS ../cryptopp562
                NO_DEFAULT_PATH
        )
        set(CRYPTOPP_LIBRARIES ${LSLOC} CACHE FILEPATH "" FORCE)
        message(STATUS "System Crypto++ not found, broken or too old. We use ${LSLOC}")
    endif()

    # Not really worth caching. We want to reevaluate anyway.
    mark_as_advanced(CRYPTOPP_INCLUDE_DIR CRYPTOPP_LIBRARIES)

    # Always "found", given last block.
    include_directories(${CRYPTOPP_INCLUDE_DIR})

	if(NOT APPLE)
		link_directories(${CRYPTOPP_LIBRARIES})
	endif()
endif()

if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
	link_directories(/usr/local/lib)
endif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")

# Generate header file containing useful build information
execute_process(COMMAND git --git-dir=${CMAKE_CURRENT_SOURCE_DIR}/.git --work-tree=${CMAKE_CURRENT_SOURCE_DIR} rev-parse HEAD OUTPUT_VARIABLE ETH_COMMIT_HASH OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND git --git-dir=${CMAKE_CURRENT_SOURCE_DIR}/.git --work-tree=${CMAKE_CURRENT_SOURCE_DIR} diff --shortstat OUTPUT_VARIABLE ETH_LOCAL_CHANGES OUTPUT_STRIP_TRAILING_WHITESPACE)
if("x${ETH_LOCAL_CHANGES}" STREQUAL "x")
	set(ETH_CLEAN_REPO 1)
else()
	set(ETH_CLEAN_REPO 0)
endif()

message("Commit Hash: ${ETH_COMMIT_HASH} (Clean: ${ETH_CLEAN_REPO} - ${ETH_LOCAL_CHANGES})")
file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/BuildInfo.h "// This file was automatically generated by cmake\n#pragma once\n\n")
file(APPEND ${CMAKE_CURRENT_BINARY_DIR}/BuildInfo.h "#define ETH_COMMIT_HASH ${ETH_COMMIT_HASH}\n#define ETH_CLEAN_REPO ${ETH_CLEAN_REPO}\n#define ETH_BUILD_TYPE ${CMAKE_BUILD_TYPE}\n#define ETH_BUILD_PLATFORM ${ETH_BUILD_PLATFORM}\n")
include_directories(${CMAKE_CURRENT_BINARY_DIR})

add_subdirectory(secp256k1)
add_subdirectory(libethereum)
add_subdirectory(test)
add_subdirectory(eth)
if (NOT HEADLESS)
	add_subdirectory(alethzero)
endif ()

unset(HEADLESS CACHE)
#unset(TARGET_PLATFORM CACHE)