project(hedgewars)

#initialise cmake environment
cmake_minimum_required(VERSION 2.6.4)
foreach(hwpolicy CMP0003 CMP0012 CMP0017 CMP0018)
    if(POLICY ${hwpolicy})
        cmake_policy(SET ${hwpolicy} NEW)
    endif()
endforeach()

set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_modules")


#possible cmake configuration
option(NOSERVER "Disable gameServer build (off)]" OFF)
option(NOPNG "Disable screenshoot compression (off)" OFF)
option(NOVIDEOREC "Disable video recording (off)" OFF)

#libraries are built shared unless explicitly added as a static
option(BUILD_SHARED_LIBS "Build libraries as shared modules (on)" ON)
#set this to ON when 2.1.0 becomes more widespread (and only for linux)
option(PHYSFS_SYSTEM "Use system physfs (off)" OFF)

if(WIN32 OR APPLE)
    option(LUA_SYSTEM "Use system lua (off)" OFF)
else()
    option(LUA_SYSTEM "Use system lua (on)" ON)
endif()

option(BUILD_ENGINE_LIBRARY "Enable hwengine library (off)" OFF)
option(ANDROID "Enable Android build (off)" OFF)

if(UNIX AND NOT APPLE)
    option(MINIMAL_FLAGS "Respect system flags as much as possible (off)" OFF)
else()
    option(NOAUTOUPDATE "Disable OS X Sparkle update checking" OFF)
endif()

set(FPFLAGS "" CACHE STRING "Additional Freepascal flags")
set(GHFLAGS "" CACHE STRING "Additional Haskell flags")
if(UNIX AND NOT APPLE)
    set(DATA_INSTALL_DIR "share/hedgewars" CACHE STRING "Resource folder path")
endif()


#versioning
set(CPACK_PACKAGE_VERSION_MAJOR 0)
set(CPACK_PACKAGE_VERSION_MINOR 9)
set(CPACK_PACKAGE_VERSION_PATCH 20)
set(HEDGEWARS_PROTO_VER 46)
set(HEDGEWARS_VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH}")
include(${CMAKE_MODULE_PATH}/revinfo.cmake)

message(STATUS "Building ${HEDGEWARS_VERSION}-r${HEDGEWARS_REVISION} (${HEDGEWARS_HASH})")


#platform specific init code
include(${CMAKE_MODULE_PATH}/platform.cmake)
include(${CMAKE_MODULE_PATH}/paths.cmake)


#when build type is not specified, assume Debug/Release according to build version information
if (CMAKE_BUILD_TYPE)
    string (TOUPPER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE)
    if ( NOT( (CMAKE_BUILD_TYPE MATCHES "RELEASE") OR (CMAKE_BUILD_TYPE MATCHES "DEBUG") ) )
        set (CMAKE_BUILD_TYPE ${default_build_type} CACHE STRING "Build type (Debug/Release)" FORCE)
        message (STATUS "Unknown build type, using default (${default_build_type})")
    endif ()
else (CMAKE_BUILD_TYPE)
    set (CMAKE_BUILD_TYPE ${default_build_type} CACHE STRING "Build type (Debug/Release)" FORCE)
endif (CMAKE_BUILD_TYPE)


#perform safe check that enable/disable compilation features
include(${CMAKE_MODULE_PATH}/compilerchecks.cmake)

#set default flags values for all projects (unless MINIMAL_FLAGS is true)
if(NOT ${MINIMAL_FLAGS})
    set(CMAKE_C_FLAGS "-pipe ${CMAKE_C_FLAGS}")
    set(CMAKE_C_FLAGS_RELEASE "-w -Os -fomit-frame-pointer ${CMAKE_C_FLAGS_RELEASE}")
    set(CMAKE_C_FLAGS_DEBUG "-Wall -O0 -g -DDEBUG ${CMAKE_C_FLAGS_DEBUG}")
    set(CMAKE_CXX_FLAGS ${CMAKE_C_FLAGS})
    set(CMAKE_CXX_FLAGS_RELEASE ${CMAKE_C_FLAGS_RELEASE})
    set(CMAKE_CXX_FLAGS_DEBUG ${CMAKE_C_FLAGS_DEBUG})
else()
    #CMake adds a lot of additional configuration flags, so let's clear them up
    set(CMAKE_C_FLAGS_RELEASE "")
    set(CMAKE_C_FLAGS_DEBUG "-Wall -DDEBUG")
    set(CMAKE_CXX_FLAGS_RELEASE "")
    set(CMAKE_CXX_FLAGS_DEBUG "-Wall -DDEBUG")
endif()

#parse additional parameters
if(FPFLAGS OR GHFLAGS)
    if(CMAKE_VERSION VERSION_GREATER "2.6")
        separate_arguments(fpflags_parsed UNIX_COMMAND ${FPFLAGS})
        separate_arguments(ghflags_parsed UNIX_COMMAND ${GHFLAGS})
    else()
        message("*** FPFLAGS and GHFLAGS are available only when using CMake >= 2.8 ***")
    endif()
endif()

list(APPEND pascal_flags ${fpflags_parsed}            # user flags
                 "-B"                                 # compile all units
                 "-vm4079,4080,4081"                  # fpc verbosity output format
                 "-FE${PROJECT_BINARY_DIR}/bin"       # fpc binaries output directory
                 "-FU${PROJECT_BINARY_DIR}/hedgewars" # fpc units output directory
                 "-Fl${PROJECT_BINARY_DIR}/bin"       # fpc linking directory (win/unix)
                 "-Fi${PROJECT_BINARY_DIR}/hedgewars" # fpc .inc path (for out of source builds)
                 "-k-L${PROJECT_BINARY_DIR}/bin"      # ld linking directory (unix/osx)
                 "-Cs2000000"                         # stack size
                 "-vewnq"                             # fpc output verbosity
                 "-dDEBUGFILE"                        # macro for engine output
                 )
list(APPEND haskell_flags ${ghflags_parsed} # user flags
                 "-O2"                      # optimise for faster code
                 )


#get BUILD_TYPE and enable/disable optimisation
message(STATUS "Using ${CMAKE_BUILD_TYPE} configuration")
if(CMAKE_BUILD_TYPE MATCHES "DEBUG")
    list(APPEND pascal_flags "-O-" # disable all optimisations
                             "-g"  # enable debug symbols
                             "-gl" # add line info to bt
                             "-gv" # allow valgrind
                             )
    list(APPEND haskell_flags "-Wall"       # all warnings
                              "-debug"      # debug mode
                              "-dcore-lint" # internal sanity check
                              )
else()
    list(APPEND pascal_flags "-Os" # optimise for size
                             "-Xs" # strip binary
                             "-Si" # turn on inlining
                             )
    list(APPEND haskell_flags "-w" # no warnings
                              )
endif()

include(${CMAKE_MODULE_PATH}/utils.cmake)

#lua discovery
if (${LUA_SYSTEM})
    if (NOT LUA_LIBRARY OR NOT LUA_INCLUDE_DIR)
        find_package(Lua)
    endif()

    if (LUA_LIBRARY AND LUA_INCLUDE_DIR)
        set(LUA_FOUND TRUE)
    else()
        message(FATAL_ERROR "Missing Lua! Rerun cmake with -DLUA_SYSTEM=off to build the internal version")
    endif()
else()
    message(STATUS "LUA will be provided by the bundled sources")
    add_subdirectory(misc/liblua)
    set(lua_output_name "hwlua")
    list(APPEND pascal_flags "-XLAlua=${lua_output_name}" "-dLUA_INTERNAL")
endif()


#physfs discovery
if (${PHYSFS_SYSTEM})
    if (NOT PHYSFS_LIBRARY OR NOT PHYSFS_INCLUDE_DIR)
        find_package(PhysFS)
    endif()

    find_file(physfs_h physfs.h ${PHYSFS_INCLUDE_DIR})
    if(physfs_h)
        file(STRINGS ${physfs_h} physfs_majorversion REGEX "PHYSFS_VER_MAJOR[\t' ']+[0-9]+")
        file(STRINGS ${physfs_h} physfs_minorversion REGEX "PHYSFS_VER_MINOR[\t' ']+[0-9]+")
        file(STRINGS ${physfs_h} physfs_patchversion REGEX "PHYSFS_VER_PATCH[\t' ']+[0-9]+")
        string(REGEX MATCH "([0-9]+)" physfs_majorversion "${physfs_majorversion}")
        string(REGEX MATCH "([0-9]+)" physfs_minorversion "${physfs_minorversion}")
        string(REGEX MATCH "([0-9]+)" physfs_patchversion "${physfs_patchversion}")
        set(physfs_detected_ver "${physfs_majorversion}.${physfs_minorversion}.${physfs_patchversion}")

        if (physfs_detected_ver VERSION_LESS "2.1.0")
            message(FATAL_ERROR "PhysFS version is too old (dected ${physfs_detected_ver}, required 2.1.0)")
            set(physfs_too_old true)
        endif()
    endif()

    if (NOT PHYSFS_LIBRARY OR NOT PHYSFS_INCLUDE_DIR)
        message(FATAL_ERROR "Missing PhysFS! Rerun cmake with -DPHYSFS_SYSTEM=off to build the internal version")
    endif()
else()
    message(STATUS "PhysFS will be provided by the bundled sources")
    set(physfs_output_name "hwphysfs")
    add_subdirectory(misc/libphysfs)
    #-XLA is a beta fpc flag that renames libraries before passing them to the linker
    #we also have to pass PHYSFS_INTERNAL to satisfy windows runtime requirements
    #(should be harmless on other platforms)
    list(APPEND pascal_flags "-XLAphysfs=${physfs_output_name}" "-dPHYSFS_INTERNAL")
endif()

find_package_or_disable_msg(FFMPEG NOVIDEOREC "Video recording will not be built")

#physfs helper library
add_subdirectory(misc/libphyslayer)

#server
if(NOT NOSERVER)
    add_subdirectory(gameServer)
endif()

#main engine
add_subdirectory(hedgewars)

#Android related build scripts
if(ANDROID)
    #run cmake -DANDROID=1 to enable this
    add_subdirectory(project_files/Android-build)
endif()

#TODO: when ANDROID, BUILD_ENGINE_LIBRARY should be set
if(NOT ANDROID)
    add_subdirectory(bin)
    add_subdirectory(QTfrontend)
    add_subdirectory(share)
    add_subdirectory(tools)
endif()


include(${CMAKE_MODULE_PATH}/cpackvars.cmake)