#the usual set of dependencies

find_package(OpenGL REQUIRED)

find_package(GLEW REQUIRED)

find_package(SDL2 REQUIRED)

find_package(SDL2_mixer REQUIRED)

find_package(SDL2_net REQUIRED)

find_package(SDL2_image REQUIRED)

find_package(SDL2_ttf REQUIRED)

#compile our rtl implementation

include_directories(${GLEW_INCLUDE_DIR})

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/rtl)

include_directories(${PHYSFS_INCLUDE_DIR})

include_directories(${PHYSLAYER_INCLUDE_DIR})

include_directories(${LUA_INCLUDE_DIR})

include_directories(${SDL2_INCLUDE_DIR})

add_subdirectory(rtl)

# convert list into pascal array

if(FONTS_DIRS)

  list(LENGTH FONTS_DIRS ndirs)

  set(FONTS_DIRS_ARRAY "array [0..${ndirs}] of PChar = (")

  foreach(fontdir ${FONTS_DIRS})

      set(FONTS_DIRS_ARRAY "${FONTS_DIRS_ARRAY}\n_P'${fontdir}',")

  endforeach(fontdir)

  set(FONTS_DIRS_ARRAY "${FONTS_DIRS_ARRAY}\nnil);\n")

else(FONTS_DIRS)

  set(FONTS_DIRS_ARRAY "array [0..1] of PChar = (nil, nil);")

endif(FONTS_DIRS)

configure_file(${CMAKE_SOURCE_DIR}/hedgewars/config.inc.in ${CMAKE_CURRENT_BINARY_DIR}/config.inc)

#get the list of pas files that are going to be converted and compiled

file(GLOB engine_sources_pas "${CMAKE_SOURCE_DIR}/hedgewars/*.pas")

list(REMOVE_ITEM engine_sources_pas "${CMAKE_SOURCE_DIR}/hedgewars/uVideoRec.pas")

list(REMOVE_ITEM engine_sources_pas "${CMAKE_SOURCE_DIR}/hedgewars/uTouch.pas")

list(REMOVE_ITEM engine_sources_pas "${CMAKE_SOURCE_DIR}/hedgewars/PNGh.pas")

list(REMOVE_ITEM engine_sources_pas "${CMAKE_SOURCE_DIR}/hedgewars/pas2cSystem.pas")

list(REMOVE_ITEM engine_sources_pas "${CMAKE_SOURCE_DIR}/hedgewars/pas2cRedo.pas")

list(REMOVE_ITEM engine_sources_pas "${CMAKE_SOURCE_DIR}/hedgewars/hwLibrary.pas")

if(NOT GL2)

    list(REMOVE_ITEM engine_sources_pas "${CMAKE_SOURCE_DIR}/hedgewars/uMatrix.pas")

endif()

#remove and readd hwengine so that it is compiled first, compiling every other file in the process

list(REMOVE_ITEM engine_sources_pas ${CMAKE_SOURCE_DIR}/hedgewars/hwengine.pas)

list(APPEND engine_sources_pas ${CMAKE_SOURCE_DIR}/hedgewars/hwengine.pas)

#process files .pas -> .c

foreach(sourcefile ${engine_sources_pas})

    get_filename_component(sourcename ${sourcefile} NAME_WE) #drops .pas

    list(APPEND engine_sources "${CMAKE_CURRENT_BINARY_DIR}/${sourcename}.c")

endforeach()

#add again files for external functions and for fpcrtl_ functions

list(APPEND engine_sources_pas ${CMAKE_SOURCE_DIR}/hedgewars/pas2cSystem.pas)

list(APPEND engine_sources_pas ${CMAKE_SOURCE_DIR}/hedgewars/pas2cRedo.pas)

set(pas2c_args -n hwengine

               -i ${CMAKE_SOURCE_DIR}/hedgewars

               -o ${CMAKE_CURRENT_BINARY_DIR}

               -a ${CMAKE_CURRENT_BINARY_DIR}

               -d ENDIAN_LITTLE

               -d DEBUGFILE)

if(BUILD_ENGINE_JS)

    set(pas2c_args ${pas2c_args} -d WEBGL)

endif()

if(BUILD_ENGINE_LIBRARY)

    set(pas2c_args ${pas2c_args} -d HWLIBRARY)

endif()

if(GL2)

    set(pas2c_args ${pas2c_args} -d GL2)

endif()

#invoke pas2c on main module, it will call all the others

add_custom_command(OUTPUT ${engine_sources}

                   COMMAND "${EXECUTABLE_OUTPUT_PATH}/pas2c${CMAKE_EXECUTABLE_SUFFIX}"

                   ARGS ${pas2c_args}

                   DEPENDS pas2c                     #converter tool

                           ${engine_sources_pas}     #original pascal file

                  )

#wrap conversion for all source in this command

add_custom_target(engine_c DEPENDS ${engine_sources})

if(BUILD_ENGINE_JS)

    add_flag_append(CMAKE_C_FLAGS "--memory-init-file 0 -O0 --js-opts 0 -g4 --use-preload-plugins -s ASSERTIONS=2 -s USE_SDL=2 -s USE_SDL_IMAGE=1 -s USE_LIBPNG=1 -s USE_SDL_TTF=2 -s USE_VORBIS=1 -s USE_OGG=1 -s TOTAL_MEMORY=100000000 -s GL_UNSAFE_OPTS=0 -s EXPORTED_FUNCTIONS=\"['_hwengine_RunEngine', '_hwengine_MainLoop']\" --post-js ${CMAKE_SOURCE_DIR}/project_files/web/post.js --pre-js ${CMAKE_SOURCE_DIR}/project_files/web/pre.js")

endif()

#compile the c files

add_definitions(-DPAS2C)

add_definitions(-Werror=incompatible-pointer-types)

add_executable(hwengine WIN32 ${engine_sources})

if(BUILD_ENGINE_JS)

    set_target_properties(hwengine PROPERTIES SUFFIX ".html")

endif()

target_link_libraries(hwengine  fpcrtl

                                ${LUA_LIBRARY}

                                ${OPENGL_LIBRARY}

                                ${SDL2_LIBRARY}

                                ${SDL2_MIXER_LIBRARY}

                                ${SDL2_NET_LIBRARY}

                                ${SDL2_IMAGE_LIBRARY}

                                ${SDL2_TTF_LIBRARY}

                                ${GLEW_LIBRARY}

                                physfs

                                physlayer

                                m

                                #TODO: add other libraries

                            )

install(PROGRAMS "${EXECUTABLE_OUTPUT_PATH}/hwengine${CMAKE_EXECUTABLE_SUFFIX}" DESTINATION ${target_binary_install_dir})