# Copyright (c) 2018 Cisco and/or its affiliates.
# 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.

cmake_minimum_required(VERSION 3.5 FATAL_ERROR)

project(jvpp)

include(CheckCCompilerFlag)

if (CMAKE_SYSTEM_PROCESSOR MATCHES "amd64.*|x86_64.*|AMD64.*")
    set(CMAKE_C_FLAGS "-march=corei7 -mtune=corei7-avx ${CMAKE_C_FLAGS}")
elseif (CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
    set(CMAKE_C_FLAGS "-march=armv8-a+crc ${CMAKE_C_FLAGS}")
endif ()

check_c_compiler_flag("-Wno-address-of-packed-member" compiler_flag_no_address_of_packed_member)
if (compiler_flag_no_address_of_packed_member)
    add_definitions(-Wno-address-of-packed-member)
endif ()

find_package(Threads REQUIRED)

# OPTIONS
option(PackZip "Create ZIP package (default: fasle)" false)
option(PackTgz "Create Tgz package (default: fasle)" false)

message("\nOptions:")
message("    PackZip: ${PackZip}")
message("    PackTgz: ${PackTgz}")

message("\nEnvironment Variables:")

# JVPP RELATED VARIABLES
unset(JVPP_VERSION)
unset(JAPI_LIB_VERSION)
execute_process(
        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/
        COMMAND ./version
        OUTPUT_VARIABLE JVPP_VERSION
        OUTPUT_STRIP_TRAILING_WHITESPACE
)
string(REPLACE "-" ";" JAPI_LIB_VERSION ${JVPP_VERSION})
list(GET JAPI_LIB_VERSION 0 JAPI_LIB_VERSION)

message("    JVPP Main Version: ${JVPP_VERSION}")
message("    JVPP Version: ${JAPI_LIB_VERSION}")

# OS RELATED VARIABLES
list(APPEND DebianBasedOS "Ubuntu" "LinuxMint")
list(APPEND RHBasedOS "CentOS")
unset(RELEASE_ID)
unset(RELEASE_CODENAME)
find_program(LSB_RELEASE_EXEC lsb_release)
execute_process(COMMAND ${LSB_RELEASE_EXEC} -is
        OUTPUT_VARIABLE RELEASE_ID
        OUTPUT_STRIP_TRAILING_WHITESPACE
        )

execute_process(COMMAND ${LSB_RELEASE_EXEC} -cs
        OUTPUT_VARIABLE RELEASE_CODENAME
        OUTPUT_STRIP_TRAILING_WHITESPACE
        )

message("    OS Release Id: ${RELEASE_ID} ")
message("    OS Release Codename: ${RELEASE_CODENAME} ")


set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/build-root/lib)
set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/lib)
set(CMAKE_INSTALL_MESSAGE NEVER)

unset(dirlist)

macro(subdirlist dirlist dirpath)
    file(GLOB dirs RELATIVE ${dirpath} ${dirpath}/*)
    foreach (dir ${dirs})
        if (IS_DIRECTORY ${dirpath}/${dir})
            list(APPEND dirlist ${dirpath}/${dir})
        endif ()
    endforeach ()
endmacro()

list(APPEND dirlist $ENV{JAVA_HOME})
subdirlist(dirlist /usr/lib/jvm)
subdirlist(dirlist /usr/lib64/jvm)

unset(JAVA_HOME_SET)
find_path(JAVA_HOME_SET NAMES include/jni.h PATHS ${dirlist})
if (NOT JAVA_HOME_SET)
  message("JAVA_HOME is not found")
else()
  set(ENV{JAVA_HOME} "${JAVA_HOME_SET}")
endif()

message("\nJAVA:")
message("    Java home: $ENV{JAVA_HOME}")
find_package(Java 1.8 REQUIRED COMPONENTS Development)
get_filename_component(jvm_path ${Java_JAVAC_EXECUTABLE} DIRECTORY)
set(Java_INCLUDE_DIRS ${jvm_path}/../include ${jvm_path}/../include/linux)
message("    Java: ${Java_JAVA_EXECUTABLE}")
message("    Java version: ${Java_VERSION_STRING}")
message("    Java headers: ${Java_INCLUDE_DIRS}")
message("    Javac: ${Java_JAVAC_EXECUTABLE}")

execute_process(COMMAND ./scripts/verify-installed vpp* OUTPUT_VARIABLE VPP_INSTALLED)
string(STRIP "${VPP_INSTALLED}" VPP_INSTALLED)

if (${VPP_INSTALLED} MATCHES "vpp-dev")
  message("\nVPP instalation found.")
  message("Packages: \n${VPP_INSTALLED}")
else()
  if (${RELEASE_ID} IN_LIST DebianBasedOS)
    set(REQUIREMENTS "vpp, vpp-dev, libvppinfra, vpp-plugin-core")
  else()
    set(REQUIREMENTS "vpp, vpp-devel, vpp-plugins")
  endif()
  message(FATAL_ERROR "Error VPP is not installed.\nPlease install: ${REQUIREMENTS}.")
endif()

add_subdirectory(java)