#-------------------------------------------------------------------------------
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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.
#-------------------------------------------------------------------------------


cmake_minimum_required(VERSION 3.14)
message(STATUS "Building using CMake version: ${CMAKE_VERSION}")

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

MACRO (GET_CURRENT_TIME CURRENT_TIME)
    execute_process(COMMAND "date" +"%Y-%m-%d %H:%M.%S" OUTPUT_VARIABLE ${CURRENT_TIME})
ENDMACRO (GET_CURRENT_TIME)

GET_CURRENT_TIME(BUILD_TIME)
string(REGEX REPLACE "\n" "" BUILD_TIME ${BUILD_TIME})
message(STATUS "Build time = ${BUILD_TIME}")

MACRO (GET_GIT_BRANCH_NAME GIT_BRANCH_NAME)
    execute_process(COMMAND "git" symbolic-ref --short HEAD OUTPUT_VARIABLE ${GIT_BRANCH_NAME})
ENDMACRO (GET_GIT_BRANCH_NAME)

GET_GIT_BRANCH_NAME(GIT_BRANCH_NAME)
if(NOT GIT_BRANCH_NAME STREQUAL "")
    string(REGEX REPLACE "\n" "" GIT_BRANCH_NAME ${GIT_BRANCH_NAME})
endif()

set(MILVUS_VERSION "${GIT_BRANCH_NAME}")
string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]" MILVUS_VERSION "${MILVUS_VERSION}")

set(CLANG_FORMAT_VERSION "6.0")
find_package(ClangTools)
set(BUILD_SUPPORT_DIR "${CMAKE_SOURCE_DIR}/build-support")

if(CMAKE_BUILD_TYPE STREQUAL "Release")
    set(BUILD_TYPE "Release")
else()
    set(BUILD_TYPE "Debug")
endif()
message(STATUS "Build type = ${BUILD_TYPE}")

project(milvus VERSION "${MILVUS_VERSION}")
project(milvus_engine LANGUAGES CUDA CXX)

set(MILVUS_VERSION_MAJOR "${milvus_VERSION_MAJOR}")
set(MILVUS_VERSION_MINOR "${milvus_VERSION_MINOR}")
set(MILVUS_VERSION_PATCH "${milvus_VERSION_PATCH}")

if(MILVUS_VERSION_MAJOR STREQUAL ""
        OR MILVUS_VERSION_MINOR STREQUAL ""
        OR MILVUS_VERSION_PATCH STREQUAL "")
    message(WARNING "Failed to determine Milvus version from git branch name")
    set(MILVUS_VERSION "0.4.0")
endif()

message(STATUS "Build version = ${MILVUS_VERSION}")
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/version.h.macro ${CMAKE_CURRENT_SOURCE_DIR}/version.h)

message(STATUS "Milvus version: "
        "${MILVUS_VERSION_MAJOR}.${MILVUS_VERSION_MINOR}.${MILVUS_VERSION_PATCH} "
        "(full: '${MILVUS_VERSION}')")

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED on)

if(CMAKE_SYSTEM_PROCESSOR MATCHES "(x86)|(X86)|(amd64)|(AMD64)")
    message(STATUS "Building milvus_engine on x86 architecture")
    set(MILVUS_BUILD_ARCH x86_64)
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "(ppc)")
    message(STATUS "Building milvus_engine on ppc architecture")
    set(MILVUS_BUILD_ARCH ppc64le)
else()
    message(WARNING "Unknown processor type")
    message(WARNING "CMAKE_SYSTEM_PROCESSOR=${CMAKE_SYSTEM_PROCESSOR}")
    set(MILVUS_BUILD_ARCH unknown)
endif()

find_package(CUDA)
set(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS} -Xcompiler -fPIC -std=c++11 -D_FORCE_INLINES --expt-extended-lambda")

if(CMAKE_BUILD_TYPE STREQUAL "Release")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3 -fPIC -DELPP_THREAD_SAFE -fopenmp")
    set(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS} -O3")
else()
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O0 -g -fPIC -DELPP_THREAD_SAFE -fopenmp")
    set(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS} -O0 -g")
endif()

# Ensure that a default make is set
if("${MAKE}" STREQUAL "")
    if(NOT MSVC)
        find_program(MAKE make)
    endif()
endif()

find_path(MYSQL_INCLUDE_DIR
            NAMES "mysql.h"
            PATH_SUFFIXES "mysql")
if (${MYSQL_INCLUDE_DIR} STREQUAL "MYSQL_INCLUDE_DIR-NOTFOUND")
    message(FATAL_ERROR "Could not found MySQL include directory")
else()
    include_directories(${MYSQL_INCLUDE_DIR})
endif()

set(MILVUS_SOURCE_DIR ${PROJECT_SOURCE_DIR})
set(MILVUS_BINARY_DIR ${PROJECT_BINARY_DIR})
set(MILVUS_ENGINE_SRC ${PROJECT_SOURCE_DIR}/src)

include(ExternalProject)
include(DefineOptions)
include(BuildUtils)
include(ThirdPartyPackages)

config_summary()

add_subdirectory(src)

if (BUILD_UNIT_TEST STREQUAL "ON")
    if (BUILD_COVERAGE STREQUAL "ON")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")
    endif()
    add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/unittest)
endif()

add_custom_target(Clean-All COMMAND ${CMAKE_BUILD_TOOL} clean)

if("${MILVUS_DB_PATH}" STREQUAL "")
    set(MILVUS_DB_PATH "/tmp/milvus")
endif()
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/conf/server_config.template ${CMAKE_CURRENT_SOURCE_DIR}/conf/server_config.yaml)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/conf/log_config.template ${CMAKE_CURRENT_SOURCE_DIR}/conf/log_config.conf)

install(DIRECTORY scripts/
        DESTINATION scripts
        FILE_PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ
        GROUP_EXECUTE GROUP_READ
        WORLD_EXECUTE WORLD_READ
        FILES_MATCHING PATTERN "*.sh")
install(FILES
        conf/server_config.yaml
        conf/log_config.conf
        DESTINATION
        conf)

add_custom_target(format ${BUILD_SUPPORT_DIR}/run_clang_format.py
  ${CLANG_FORMAT_BIN}
  ${BUILD_SUPPORT_DIR}/clang_format_exclusions.txt
  ${CMAKE_CURRENT_SOURCE_DIR}/src)