#
#  Copyright (c) 2019, The OpenThread Authors.
#  All rights reserved.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions are met:
#  1. Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
#  2. Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#  3. Neither the name of the copyright holder nor the
#     names of its contributors may be used to endorse or promote products
#     derived from this software without specific prior written permission.
#
#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
#  POSSIBILITY OF SUCH DAMAGE.
#

cmake_policy(SET CMP0048 NEW)
cmake_minimum_required(VERSION 3.10.2)

file(READ .default-version OT_DEFAULT_VERSION)
string(STRIP ${OT_DEFAULT_VERSION} OT_DEFAULT_VERSION)

project(openthread VERSION ${OT_DEFAULT_VERSION})

option(OT_BUILD_EXECUTABLES "Build executables" ON)
option(OT_COVERAGE "enable coverage" OFF)
set(OT_EXTERNAL_MBEDTLS "" CACHE STRING "Specify external mbedtls library")
option(OT_MBEDTLS_THREADING "enable mbedtls threading" OFF)

add_library(ot-config INTERFACE)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_C_STANDARD 99)

message(STATUS "OpenThread Source Directory: ${PROJECT_SOURCE_DIR}")

target_include_directories(ot-config INTERFACE
    ${PROJECT_SOURCE_DIR}/include
    ${PROJECT_SOURCE_DIR}/src
    ${PROJECT_SOURCE_DIR}/src/core
)

include(TestBigEndian)
TEST_BIG_ENDIAN(OT_BIG_ENDIAN)
if(OT_BIG_ENDIAN)
    target_compile_definitions(ot-config INTERFACE "BYTE_ORDER_BIG_ENDIAN=1")
endif()

include("${PROJECT_SOURCE_DIR}/etc/cmake/checks.cmake")
include("${PROJECT_SOURCE_DIR}/etc/cmake/options.cmake")
include("${PROJECT_SOURCE_DIR}/etc/cmake/functions.cmake")

if(NOT CMAKE_BUILD_TYPE)
    # Check if this is a top-level CMake.
    # If it is not, do not set the CMAKE_BUILD_TYPE because OpenThread is a part of something bigger.
    if ("${CMAKE_PROJECT_NAME}" STREQUAL "openthread")
        set(CMAKE_BUILD_TYPE "Debug" CACHE STRING "default build type: Debug" FORCE)
    endif ()
endif()

if (CMAKE_BUILD_TYPE)
    message(STATUS "OpenThread CMake build type: ${CMAKE_BUILD_TYPE}")
endif ()

if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "(Apple)?[Cc]lang")
    option(OT_COMPILE_WARNING_AS_ERROR "whether to include -Werror -pedantic-errors with gcc-compatible compilers")
    if (OT_COMPILE_WARNING_AS_ERROR)
        set(OT_CFLAGS -Werror -pedantic-errors)
    endif()

    if(OT_COVERAGE)
        target_compile_definitions(ot-config INTERFACE "OPENTHREAD_ENABLE_COVERAGE=1")
        target_compile_options(ot-config INTERFACE -g -O0 --coverage)
        target_link_libraries(ot-config INTERFACE --coverage)
    endif()

    set(OT_CFLAGS
        $<$<COMPILE_LANGUAGE:C>:${OT_CFLAGS} -Wall -Wextra -Wshadow>
        $<$<COMPILE_LANGUAGE:CXX>:${OT_CFLAGS} -Wall -Wextra -Wshadow -Wno-c++14-compat -fno-exceptions>
    )
endif()

set(OT_PACKAGE_NAME "OPENTHREAD" CACHE STRING "OpenThread Package Name")
target_compile_definitions(ot-config INTERFACE "PACKAGE_NAME=\"${OT_PACKAGE_NAME}\"")
message(STATUS "Package Name: ${OT_PACKAGE_NAME}")

set(OT_PACKAGE_VERSION "" CACHE STRING "OpenThread Package Version")
if(OT_PACKAGE_VERSION STREQUAL "")
    ot_git_version(OT_PACKAGE_VERSION)
    message(STATUS "Setting default package version: ${OT_PACKAGE_VERSION}")
endif()
message(STATUS "Package Version: ${OT_PACKAGE_VERSION}")

set(OT_THREAD_VERSION "1.2" CACHE STRING "Thread version chosen by the user at configure time")
set_property(CACHE OT_THREAD_VERSION PROPERTY STRINGS "1.1" "1.2")
if(${OT_THREAD_VERSION} EQUAL "1.1")
    target_compile_definitions(ot-config INTERFACE "OPENTHREAD_CONFIG_THREAD_VERSION=OT_THREAD_VERSION_1_1")
elseif(${OT_THREAD_VERSION} EQUAL "1.2")
    target_compile_definitions(ot-config INTERFACE "OPENTHREAD_CONFIG_THREAD_VERSION=OT_THREAD_VERSION_1_2")
else()
    message(FATAL_ERROR "Thread version unknown: ${OT_THREAD_VERSION}")
endif()

set(OT_PLATFORM "NO" CACHE STRING "Target platform chosen by the user at configure time")
ot_get_platforms(OT_PLATFORMS)
set_property(CACHE OT_PLATFORM PROPERTY STRINGS ${OT_PLATFORMS})
if(NOT OT_PLATFORM IN_LIST OT_PLATFORMS)
    message(FATAL_ERROR "Platform unknown: ${OT_PLATFORM}")
endif()

set(OT_LOG_LEVEL "" CACHE STRING "set OpenThread log level")
set(OT_LOG_LEVEL_VALUES
    "NONE"
    "CRIT"
    "WARN"
    "NOTE"
    "INFO"
    "DEBG"
)
set_property(CACHE OT_LOG_LEVEL PROPERTY STRINGS ${OT_LOG_LEVEL_VALUES})
if(OT_LOG_LEVEL)
    target_compile_definitions(ot-config INTERFACE "OPENTHREAD_CONFIG_LOG_LEVEL=OT_LOG_LEVEL_${OT_LOG_LEVEL}")
endif()

set(OT_LOG_OUTPUT_VALUES
    "APP"
    "DEBUG_UART"
    "NONE"
    "PLATFORM_DEFINED"
)
if(OT_REFERENCE_DEVICE AND NOT OT_PLATFORM STREQUAL "posix")
    set(OT_LOG_OUTPUT "APP" CACHE STRING "Set log output to application for reference device")
else()
    set(OT_LOG_OUTPUT "" CACHE STRING "Where log output goes to")
endif()
set_property(CACHE OT_LOG_OUTPUT PROPERTY STRINGS ${OT_LOG_OUTPUT_VALUES})
if(OT_LOG_OUTPUT)
    if(NOT OT_LOG_OUTPUT IN_LIST OT_LOG_OUTPUT_VALUES)
        message(FATAL_ERROR "Log output unknown: ${OT_LOG_OUTPUT}")
    endif()
    target_compile_definitions(ot-config INTERFACE "OPENTHREAD_CONFIG_LOG_OUTPUT=OPENTHREAD_CONFIG_LOG_OUTPUT_${OT_LOG_OUTPUT}")
    message(STATUS "Log output: ${OT_LOG_OUTPUT}")
endif()

# OT_CONFIG allows users to specify the path to a customized OpenThread
# config header file. The default value of this parameter is empty string.
# When not specified by user (value is ""), a platform cmake file may
# choose to change this variable to provide its own OpenThread config header
# file instead.

set(OT_CONFIG "" CACHE STRING "OpenThread project-specific config header file chosen by user at configure time")

list(APPEND OT_PUBLIC_INCLUDES ${PROJECT_BINARY_DIR}/etc/cmake)
list(APPEND OT_PUBLIC_INCLUDES ${PROJECT_SOURCE_DIR}/etc/cmake)
list(APPEND OT_PUBLIC_INCLUDES ${PROJECT_SOURCE_DIR}/include)

if(OT_PLATFORM STREQUAL "posix")
    target_include_directories(ot-config INTERFACE ${PROJECT_SOURCE_DIR}/src/posix/platform)
    add_subdirectory("${PROJECT_SOURCE_DIR}/src/posix/platform")
elseif(OT_PLATFORM STREQUAL "external")
    # skip in this case
else()
    target_include_directories(ot-config INTERFACE ${PROJECT_SOURCE_DIR}/examples/platforms/${OT_PLATFORM})
    add_subdirectory("${PROJECT_SOURCE_DIR}/examples/platforms/${OT_PLATFORM}")
endif()

if(OT_CONFIG)
    target_compile_definitions(ot-config INTERFACE "OPENTHREAD_CONFIG_FILE=\"${OT_CONFIG}\"")
    message(STATUS "OpenThread Config File: \"${OT_CONFIG}\"")
endif()

target_compile_definitions(ot-config INTERFACE ${OT_PLATFORM_DEFINES})

if(OT_PLATFORM STREQUAL "posix")
    if(OT_BUILD_EXECUTABLES)
        add_subdirectory(src/posix)
    else()
        add_subdirectory(src/posix EXCLUDE_FROM_ALL)
    endif()
elseif(OT_PLATFORM)
    add_subdirectory(examples)
endif()

if (OT_DOC)
    add_subdirectory(doc)
endif()

add_subdirectory(src)
add_subdirectory(third_party EXCLUDE_FROM_ALL)

if(OT_PLATFORM STREQUAL "simulation")
    enable_testing()
endif()

add_subdirectory(tests)

add_custom_target(print-ot-config ALL
                  COMMAND ${CMAKE_COMMAND}
                  -DLIST="$<TARGET_PROPERTY:ot-config,INTERFACE_COMPILE_DEFINITIONS>"
                  -P ${PROJECT_SOURCE_DIR}/etc/cmake/print.cmake
)