option(ANTLR_BUILD_CPP_TESTS "Build C++ tests." ON)

include_directories(
  ${PROJECT_SOURCE_DIR}/runtime/src
  ${PROJECT_SOURCE_DIR}/runtime/src/atn
  ${PROJECT_SOURCE_DIR}/runtime/src/dfa
  ${PROJECT_SOURCE_DIR}/runtime/src/misc
  ${PROJECT_SOURCE_DIR}/runtime/src/support
  ${PROJECT_SOURCE_DIR}/runtime/src/tree
  ${PROJECT_SOURCE_DIR}/runtime/src/tree/pattern
  ${PROJECT_SOURCE_DIR}/runtime/src/tree/xpath
)


file(GLOB libantlrcpp_SRC
  "${PROJECT_SOURCE_DIR}/runtime/src/*.cpp"
  "${PROJECT_SOURCE_DIR}/runtime/src/atn/*.cpp"
  "${PROJECT_SOURCE_DIR}/runtime/src/dfa/*.cpp"
  "${PROJECT_SOURCE_DIR}/runtime/src/misc/*.cpp"
  "${PROJECT_SOURCE_DIR}/runtime/src/support/*.cpp"
  "${PROJECT_SOURCE_DIR}/runtime/src/tree/*.cpp"
  "${PROJECT_SOURCE_DIR}/runtime/src/tree/pattern/*.cpp"
  "${PROJECT_SOURCE_DIR}/runtime/src/tree/xpath/*.cpp"
)

add_library(antlr4_shared SHARED ${libantlrcpp_SRC})
add_library(antlr4_static STATIC ${libantlrcpp_SRC})

set(LIB_OUTPUT_DIR "${CMAKE_HOME_DIRECTORY}/dist") # put generated libraries here.
message(STATUS "Output libraries to ${LIB_OUTPUT_DIR}")

# make sure 'make' works fine even if ${LIB_OUTPUT_DIR} is deleted.
add_custom_target(make_lib_output_dir ALL
    COMMAND ${CMAKE_COMMAND} -E make_directory ${LIB_OUTPUT_DIR}
    )

add_dependencies(antlr4_shared make_lib_output_dir)
add_dependencies(antlr4_static make_lib_output_dir)

if (ANTLR_BUILD_CPP_TESTS)
  include(FetchContent)

  FetchContent_Declare(
    googletest
    URL https://github.com/google/googletest/archive/e2239ee6043f73722e7aa812a459f54a28552929.zip
  )

  set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)

  FetchContent_MakeAvailable(googletest)

  file(GLOB libantlrcpp_TESTS
    "${PROJECT_SOURCE_DIR}/runtime/tests/*.cpp"
  )

  add_executable(
    antlr4_tests
    ${libantlrcpp_TESTS}
  )

  target_link_libraries(
    antlr4_tests
    antlr4_static
    gtest_main
  )

  include(GoogleTest)

  gtest_discover_tests(antlr4_tests)
endif()

if(CMAKE_SYSTEM_NAME MATCHES "Linux")
  target_link_libraries(antlr4_shared ${UUID_LIBRARIES})
  target_link_libraries(antlr4_static ${UUID_LIBRARIES})
elseif(APPLE)
  target_link_libraries(antlr4_shared ${COREFOUNDATION_LIBRARY})
  target_link_libraries(antlr4_static ${COREFOUNDATION_LIBRARY})
endif()

if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
  set(disabled_compile_warnings "/wd4251")
else()
  set(disabled_compile_warnings "-Wno-overloaded-virtual")
endif()


if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
  set(disabled_compile_warnings "${disabled_compile_warnings} -Wno-dollar-in-identifier-extension -Wno-four-char-constants")
elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Intel")
  set(disabled_compile_warnings "${disabled_compile_warnings} -Wno-multichar")
endif()

set(extra_share_compile_flags "")
set(extra_static_compile_flags "")
if(WIN32)
  set(extra_share_compile_flags "-DANTLR4CPP_EXPORTS")
  set(extra_static_compile_flags "-DANTLR4CPP_STATIC")
endif(WIN32)
if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
  if(WITH_STATIC_CRT)
    target_compile_options(antlr4_shared PRIVATE "/MT$<$<CONFIG:Debug>:d>")
    target_compile_options(antlr4_static PRIVATE "/MT$<$<CONFIG:Debug>:d>")
  else()
    target_compile_options(antlr4_shared PRIVATE "/MD$<$<CONFIG:Debug>:d>")
    target_compile_options(antlr4_static PRIVATE "/MD$<$<CONFIG:Debug>:d>")
  endif()
endif()

set(static_lib_suffix "")
if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
  set(static_lib_suffix "-static")
endif()

if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
  set(extra_share_compile_flags "-DANTLR4CPP_EXPORTS -MP /wd4251")
  set(extra_static_compile_flags "-DANTLR4CPP_STATIC -MP")
endif()

set_target_properties(antlr4_shared
                      PROPERTIES VERSION   ${ANTLR_VERSION}
                                 SOVERSION ${ANTLR_VERSION}
                                 OUTPUT_NAME antlr4-runtime
                                 LIBRARY_OUTPUT_DIRECTORY ${LIB_OUTPUT_DIR}
                                 # TODO: test in windows. DLL is treated as runtime.
                                 # see https://cmake.org/cmake/help/v3.0/prop_tgt/LIBRARY_OUTPUT_DIRECTORY.html
                                 RUNTIME_OUTPUT_DIRECTORY ${LIB_OUTPUT_DIR}
                                 ARCHIVE_OUTPUT_DIRECTORY ${LIB_OUTPUT_DIR}
                                 COMPILE_FLAGS "${disabled_compile_warnings} ${extra_share_compile_flags}")

set_target_properties(antlr4_static
                      PROPERTIES VERSION   ${ANTLR_VERSION}
                                 SOVERSION ${ANTLR_VERSION}
                                 OUTPUT_NAME "antlr4-runtime${static_lib_suffix}"
                                 ARCHIVE_OUTPUT_DIRECTORY ${LIB_OUTPUT_DIR}
                                 COMPILE_FLAGS "${disabled_compile_warnings} ${extra_static_compile_flags}")

install(TARGETS antlr4_shared
        EXPORT antlr4-targets
        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})

install(TARGETS antlr4_static
        EXPORT antlr4-targets
        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})

install(DIRECTORY "${PROJECT_SOURCE_DIR}/runtime/src/"
        DESTINATION "include/antlr4-runtime"
        COMPONENT dev
        FILES_MATCHING PATTERN "*.h"
        )