# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

IF(WITH_TESTING)
    ENABLE_TESTING()
ENDIF()

INCLUDE(GNUInstallDirs)
INCLUDE(ExternalProject)

SET(GTEST_PREFIX_DIR    ${THIRD_PARTY_PATH}/gtest)
SET(GTEST_SOURCE_DIR    ${THIRD_PARTY_PATH}/gtest/src/extern_gtest)
SET(GTEST_INSTALL_DIR   ${THIRD_PARTY_PATH}/install/gtest)
SET(GTEST_INCLUDE_DIR   "${GTEST_INSTALL_DIR}/include" CACHE PATH "gtest include directory." FORCE)
set(GTEST_REPOSITORY     https://github.com/google/googletest.git)
set(GTEST_TAG            release-1.8.1)

INCLUDE_DIRECTORIES(${GTEST_INCLUDE_DIR})

IF(WIN32)
    set(GTEST_LIBRARIES
        "${GTEST_INSTALL_DIR}/${CMAKE_INSTALL_LIBDIR}/gtest.lib" CACHE FILEPATH "gtest libraries." FORCE)
    set(GTEST_MAIN_LIBRARIES
        "${GTEST_INSTALL_DIR}/${CMAKE_INSTALL_LIBDIR}/gtest_main.lib" CACHE FILEPATH "gtest main libraries." FORCE)
ELSE(WIN32)
    set(GTEST_LIBRARIES
        "${GTEST_INSTALL_DIR}/${CMAKE_INSTALL_LIBDIR}/libgtest.a" CACHE FILEPATH "gtest libraries." FORCE)
    set(GTEST_MAIN_LIBRARIES
        "${GTEST_INSTALL_DIR}/${CMAKE_INSTALL_LIBDIR}/libgtest_main.a" CACHE FILEPATH "gtest main libraries." FORCE)
ENDIF(WIN32)

IF(WITH_MKLML)
    # wait for mklml downloading completed
    SET(GTEST_DEPENDS   ${MKLML_PROJECT})
ENDIF()

cache_third_party(extern_gtest
    REPOSITORY       ${GTEST_REPOSITORY}
    TAG              ${GTEST_TAG}
    DIR              GTEST_SOURCE_DIR)

ExternalProject_Add(
    extern_gtest
    ${EXTERNAL_PROJECT_LOG_ARGS}
    ${SHALLOW_CLONE}
    "${GTEST_DOWNLOAD_CMD}"
    DEPENDS         ${GTEST_DEPENDS}
    PREFIX          ${GTEST_PREFIX_DIR}
    SOURCE_DIR      ${GTEST_SOURCE_DIR}
    UPDATE_COMMAND  ""
    CMAKE_ARGS      -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
                    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
                    -DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}
                    -DCMAKE_CXX_FLAGS_RELEASE=${CMAKE_CXX_FLAGS_RELEASE}
                    -DCMAKE_CXX_FLAGS_DEBUG=${CMAKE_CXX_FLAGS_DEBUG}
                    -DCMAKE_C_FLAGS=${CMAKE_C_FLAGS}
                    -DCMAKE_C_FLAGS_DEBUG=${CMAKE_C_FLAGS_DEBUG}
                    -DCMAKE_C_FLAGS_RELEASE=${CMAKE_C_FLAGS_RELEASE}
                    -DCMAKE_INSTALL_PREFIX=${GTEST_INSTALL_DIR}
                    -DCMAKE_POSITION_INDEPENDENT_CODE=ON
                    -DBUILD_GMOCK=ON
                    -Dgtest_disable_pthreads=ON
                    -Dgtest_force_shared_crt=ON
                    -DCMAKE_BUILD_TYPE=${THIRD_PARTY_BUILD_TYPE}
                    ${EXTERNAL_OPTIONAL_ARGS}
    CMAKE_CACHE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${GTEST_INSTALL_DIR}
                     -DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=ON
                     -DCMAKE_BUILD_TYPE:STRING=${THIRD_PARTY_BUILD_TYPE}
)

ADD_LIBRARY(gtest STATIC IMPORTED GLOBAL)
SET_PROPERTY(TARGET gtest PROPERTY IMPORTED_LOCATION ${GTEST_LIBRARIES})
ADD_DEPENDENCIES(gtest extern_gtest)

ADD_LIBRARY(gtest_main STATIC IMPORTED GLOBAL)
SET_PROPERTY(TARGET gtest_main PROPERTY IMPORTED_LOCATION ${GTEST_MAIN_LIBRARIES})
ADD_DEPENDENCIES(gtest_main extern_gtest)
