# ******************************************************************************
# Copyright 2017-2018 Intel Corporation
#
# 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.
# ******************************************************************************

# Enable ExternalProject CMake module
include(ExternalProject)

#------------------------------------------------------------------------------
# ONNX.proto definition version
#------------------------------------------------------------------------------

set(ONNX_VERSION 1.3.0)

#------------------------------------------------------------------------------
# Download and install libonnx ...
#------------------------------------------------------------------------------

set(ONNX_GIT_REPO_URL https://github.com/onnx/onnx.git)
set(ONNX_GIT_BRANCH rel-${ONNX_VERSION})

# The 'BUILD_BYPRODUCTS' arguments was introduced in CMake 3.2.
if (${CMAKE_VERSION} VERSION_LESS 3.2)
    ExternalProject_Add(
            ext_onnx
            PREFIX onnx
            GIT_REPOSITORY ${ONNX_GIT_REPO_URL}
            GIT_TAG ${ONNX_GIT_BRANCH}
            INSTALL_COMMAND ""
            UPDATE_COMMAND ""
            CMAKE_ARGS -DONNX_GEN_PB_TYPE_STUBS=OFF
                       -DProtobuf_PROTOC_EXECUTABLE=${Protobuf_PROTOC_EXECUTABLE}
                       -DProtobuf_INCLUDE_DIR=${Protobuf_INCLUDE_DIR}
                       -DPROTOBUF_LIBRARY=${Protobuf_LIBRARY}
                       -DPROTOBUF_INCLUDE_DIR=${Protobuf_INCLUDE_DIR}
                       -DPROTOBUF_SRC_ROOT_FOLDER=${Protobuf_SRC_ROOT_FOLDER}
            TMP_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/tmp"
            STAMP_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/stamp"
            DOWNLOAD_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/download"
            SOURCE_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/src"
            BINARY_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/bin"
            INSTALL_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx"
            EXCLUDE_FROM_ALL TRUE
    )
else()
    if (${CMAKE_VERSION} VERSION_LESS 3.6)
        ExternalProject_Add(
                ext_onnx
                PREFIX ext_onnx
                GIT_REPOSITORY ${ONNX_GIT_REPO_URL}
                GIT_TAG ${ONNX_GIT_BRANCH}
                INSTALL_COMMAND ""
                UPDATE_COMMAND ""
                CMAKE_ARGS -DONNX_GEN_PB_TYPE_STUBS=OFF
                           -DProtobuf_PROTOC_EXECUTABLE=${Protobuf_PROTOC_EXECUTABLE}
                           -DProtobuf_INCLUDE_DIR=${Protobuf_INCLUDE_DIR}
                           -DPROTOBUF_LIBRARY=${Protobuf_LIBRARY}
                           -DPROTOBUF_INCLUDE_DIR=${Protobuf_INCLUDE_DIR}
                           -DPROTOBUF_SRC_ROOT_FOLDER=${Protobuf_SRC_ROOT_FOLDER}
                TMP_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/tmp"
                STAMP_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/stamp"
                DOWNLOAD_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/download"
                SOURCE_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/src"
                BINARY_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/bin"
                INSTALL_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx"
                BUILD_BYPRODUCTS ${EXTERNAL_PROJECTS_ROOT}/onnx/bin/libonnx_proto.a
                                 ${EXTERNAL_PROJECTS_ROOT}/onnx/bin/libonnx.a
                EXCLUDE_FROM_ALL TRUE
        )
    else()
        # To speed things up prefer 'shallow copy' for CMake 3.6 and later
        ExternalProject_Add(
                ext_onnx
                PREFIX ext_onnx
                GIT_REPOSITORY ${ONNX_GIT_REPO_URL}
                GIT_TAG ${ONNX_GIT_BRANCH}
                GIT_SHALLOW TRUE
                INSTALL_COMMAND ""
                UPDATE_COMMAND ""
                CMAKE_ARGS -DONNX_GEN_PB_TYPE_STUBS=OFF
                           -DProtobuf_PROTOC_EXECUTABLE=${Protobuf_PROTOC_EXECUTABLE}
                           -DProtobuf_LIBRARY=${Protobuf_LIBRARY}
                           -DProtobuf_INCLUDE_DIR=${Protobuf_INCLUDE_DIR}
                TMP_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/tmp"
                STAMP_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/stamp"
                DOWNLOAD_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/download"
                SOURCE_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/src"
                BINARY_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx/bin"
                INSTALL_DIR "${EXTERNAL_PROJECTS_ROOT}/onnx"
                BUILD_BYPRODUCTS ${EXTERNAL_PROJECTS_ROOT}/onnx/bin/libonnx_proto.a
                                 ${EXTERNAL_PROJECTS_ROOT}/onnx/bin/libonnx.a
                EXCLUDE_FROM_ALL TRUE
        )
    endif()
endif()

# -----------------------------------------------------------------------------

ExternalProject_Get_Property(ext_onnx SOURCE_DIR BINARY_DIR)

set(ONNX_INCLUDE_DIR ${SOURCE_DIR}/onnx)
set(ONNX_PROTO_INCLUDE_DIR ${BINARY_DIR}/onnx)
set(ONNX_LIBRARY ${BINARY_DIR}/libonnx.a)
set(ONNX_PROTO_LIBRARY ${BINARY_DIR}/libonnx_proto.a)
set(ONNX_LIBRARIES ${ONNX_LIBRARY} ${ONNX_PROTO_LIBRARY})

if (NOT TARGET onnx::libonnx)
    add_library(onnx::libonnx UNKNOWN IMPORTED)
    set_target_properties(onnx::libonnx PROPERTIES
            INTERFACE_INCLUDE_DIRECTORIES ${ONNX_INCLUDE_DIR}
            IMPORTED_LOCATION ${ONNX_LIBRARY})
    add_dependencies(onnx::libonnx ext_onnx)
endif()

if (NOT TARGET onnnx::libonnx_proto)
    add_library(onnx::libonnx_proto UNKNOWN IMPORTED)
    set_target_properties(onnx::libonnx_proto PROPERTIES
            INTERFACE_INCLUDE_DIRECTORIES ${ONNX_PROTO_INCLUDE_DIR}
            IMPORTED_LOCATION ${ONNX_PROTO_LIBRARY})
    add_dependencies(onnx::libonnx_proto ext_onnx)
endif()