# Copyright 2016 Proyectos y Sistemas de Mantenimiento SL (eProsima).
#
# 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 build rules for Fast DDS
###############################################################################
cmake_minimum_required(VERSION 3.16.3)
cmake_policy(VERSION 3.16.3...3.20.3)

# Set CMAKE_BUILD_TYPE to Release by default.
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
    message(STATUS "Setting build type to 'Release' as none was specified.")
    set(CMAKE_BUILD_TYPE Release CACHE STRING
        "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel."
        FORCE)
    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
endif()

###############################################################################
# Project                                                                     #
###############################################################################
project(fastrtps VERSION "2.7.1" LANGUAGES C CXX)

set(PROJECT_NAME_LARGE "Fast RTPS")
string(TOUPPER "${PROJECT_NAME}" PROJECT_NAME_UPPER)

message(STATUS "Version: ${PROJECT_VERSION}")

###############################################################################
# eProsima build options
###############################################################################
option(EPROSIMA_BUILD "Activate internal building" OFF)

###############################################################################
# Warning level
###############################################################################
if(MSVC OR MSVC_IDE)
    if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
        string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
    else()
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
    endif()

    if(EPROSIMA_EXTRA_CMAKE_CXX_FLAGS)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${EPROSIMA_EXTRA_CMAKE_CXX_FLAGS}")
    endif()

    # make visual studio more gcc and clang like.
    # C4101 'identifier' : unreferenced local variable 
    # C4189 'identifier' : local variable is initialized but not referenced
    # C4555  expression has no effect; expected expression with side-effect
    # C4715: 'Test': not all control paths return a value
    # C5038 data member 'member1' will be initialized after data member 'member2'
    # C4100 'identifier' : unreferenced formal parameter (matches clang -Wunused-lambda-capture)
    add_compile_options(/w34101 /w34189 /w34555 /w34715 /w35038 /w44100)

    if(EPROSIMA_BUILD)
        string(REPLACE "/DNDEBUG" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
    endif()
else()
    set(CMAKE_CXX_FLAGS
        "${CMAKE_CXX_FLAGS} -Wall -pedantic -Wextra -Wno-unknown-pragmas -Wno-error=deprecated-declarations")
    if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-psabi")
        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--no-undefined")
    elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-undefined,error")
    endif()

    if(EPROSIMA_BUILD)
        string(REPLACE "-DNDEBUG" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
    endif()
endif()

###############################################################################
# GCC colors if using CCache
###############################################################################
if("${CMAKE_CXX_COMPILER_LAUNCHER}" STREQUAL "ccache" AND
        CMAKE_COMPILER_IS_GNUCXX AND
        CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4,8)
    add_compile_options(-fdiagnostics-color=always)
endif()

###############################################################################
# Test system configuration
###############################################################################

include(${PROJECT_SOURCE_DIR}/cmake/common/check_configuration.cmake)

set(FORCE_CXX "11" CACHE STRING "C++ standard fulfillment selection")
check_stdcxx(${FORCE_CXX})

check_endianness()

###############################################################################
# Installation paths
###############################################################################
option(APPEND_PROJECT_NAME_TO_INCLUDEDIR
  "When ON headers are installed to a path ending with a folder called \
  ${PROJECT_NAME}. This avoids include directory search order issues when \
  overriding this package from a merged catkin, ament, or colcon workspace."
  OFF)

set(BIN_INSTALL_DIR bin/ CACHE PATH "Installation directory for binaries")
set(_include_dir "include/")
if(APPEND_PROJECT_NAME_TO_INCLUDEDIR)
  string(APPEND _include_dir "${PROJECT_NAME}/")
endif()
set(INCLUDE_INSTALL_DIR "${_include_dir}" CACHE PATH "Installation directory for C++ headers")
unset(_include_dir)
set(LIB_INSTALL_DIR lib/ CACHE PATH "Installation directory for libraries")
set(DATA_INSTALL_DIR share/ CACHE PATH "Installation directory for data")
if(WIN32)
    set(DOC_DIR "doc")
else()
    set(DOC_DIR "${DATA_INSTALL_DIR}/doc")
endif()
set(DOC_INSTALL_DIR ${DOC_DIR} CACHE PATH "Installation directory for documentation")
set(LICENSE_INSTALL_DIR ${DATA_INSTALL_DIR}/${PROJECT_NAME} CACHE PATH "Installation directory for licenses")

###############################################################################
# Internal debug messages
###############################################################################

if(EPROSIMA_BUILD)
    set(INTERNAL_DEBUG ON)
endif()

###############################################################################
# Load CMake modules
###############################################################################
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/cmake/modules)

###############################################################################
# Default shared libraries
###############################################################################
# Global flag to cause add_library() to create shared libraries if on.
# If set to true, this will cause all libraries to be built shared
# unless the library was explicitly added as a static library.
option(BUILD_SHARED_LIBS "Create shared libraries by default" ON)

###############################################################################
# Load external projects.
###############################################################################
include(${PROJECT_SOURCE_DIR}/cmake/common/eprosima_libraries.cmake)

# if we are building Fast-DDS as a static library we must load Fast-CDR as one
if(NOT BUILD_SHARED_LIBS)
    set(FASTDDS_STATIC ON)
endif()

eprosima_find_package(fastcdr REQUIRED)
eprosima_find_thirdparty(Asio asio VERSION 1.10.8)
eprosima_find_thirdparty(TinyXML2 tinyxml2)

find_package(foonathan_memory REQUIRED)
message(STATUS "Found foonathan_memory: ${foonathan_memory_DIR}")
find_package(ThirdpartyBoost REQUIRED)

if(ANDROID)
    if((ANDROID_PLATFORM LESS_EQUAL 23) OR (ANDROID_NATIVE_API_LEVEL LESS_EQUAL 23))
        eprosima_find_thirdparty(android-ifaddrs android-ifaddrs)
    endif()
endif()

include_directories(thirdparty/nlohmann-json)
include_directories(thirdparty/filewatch)

###############################################################################
# Options
###############################################################################
option(SECURITY "Activate security" OFF)

if(SECURITY)
    find_package(OpenSSL REQUIRED)
else()
    find_package(OpenSSL)
endif()

if(OPENSSL_FOUND)
    message(STATUS "OpenSSL library ${OPENSSL_VERSION} found...")
endif()

option(NO_TLS "Disables TLS Support" OFF)
if(OPENSSL_FOUND AND NOT NO_TLS)
    set(TLS_FOUND 1)
else()
    set(TLS_FOUND 0)
endif()

if(SECURITY OR TLS_FOUND)
    set(LINK_SSL 1)
else()
    set(LINK_SSL 0)
endif()

option(SQLITE3_SUPPORT "Activate SQLITE3 support" ON)

option(USE_THIRDPARTY_SHARED_MUTEX [=[
Forces the use of a Boost-based shared_mutex implementation
instead of the framework one. Useful to cope with issues on
framework implementations like misguided sanitizer reports.
This implementation will be used by default on frameworks
lacking the shared_mutex feature like those not fulfilling
C++17.
]=] OFF)

###############################################################################
# SHM as Default transport
###############################################################################
option(SHM_TRANSPORT_DEFAULT "Add SHM transport to the default transports" ON)

###############################################################################
# LogConsumer default setup
###############################################################################
set(LOG_CONSUMER_DEFAULT AUTO CACHE STRING "Selects default LogConsumer")
set_property(CACHE LOG_CONSUMER_DEFAULT PROPERTY STRINGS AUTO STDOUT STDOUTERR)

if(LOG_CONSUMER_DEFAULT STREQUAL "STDOUTERR")
    set(STDOUTERR_LOG_CONSUMER ON)
endif()

###############################################################################
# Log Info default setup
###############################################################################

include(CMakeDependentOption)

set(LOG_NO_INFO_HELP "\
Do not compile Info Log level. For the sake of efficiency non-debug \
configs do not log info messages unless the option FASTDDS_ENFORCE_LOG_INFO \
is set to on.")
if(CMAKE_BUILD_TYPE MATCHES "^([Dd][Ee][Bb][Uu][Gg])$"  # single config generator
   OR ("Debug" IN_LIST CMAKE_CONFIGURATION_TYPES))      # multi config generator
    option(LOG_NO_INFO ${LOG_NO_INFO_HELP} OFF)
else()
    option(LOG_NO_INFO ${LOG_NO_INFO_HELP} ON)
endif()
unset(LOG_NO_INFO_HELP)

option(LOG_NO_WARNING "Do not compile Warning Log level" OFF)

option(LOG_NO_ERROR "Do not compile Error Log level" OFF)

cmake_dependent_option(
    FASTDDS_ENFORCE_LOG_INFO
    "The LOG_NO_INFO option must be enforced regardless of selected configuration"
    OFF
    "NOT LOG_NO_INFO"
    OFF)

if(LOG_NO_INFO)
    set(HAVE_LOG_NO_INFO 1)
else()
    set(HAVE_LOG_NO_INFO 0)
endif()

if(LOG_NO_WARNING)
    set(HAVE_LOG_NO_WARNING 1)
else()
    set(HAVE_LOG_NO_WARNING 0)
endif()

if(LOG_NO_ERROR)
    set(HAVE_LOG_NO_ERROR 1)
else()
    set(HAVE_LOG_NO_ERROR 0)
endif()

###############################################################################
# Tools default setup
###############################################################################
option(COMPILE_TOOLS "Build tools" ON)

if(EPROSIMA_BUILD)
    set(COMPILE_TOOLS ON)
endif()

###############################################################################
# Fast DDS statistics tool default setup
###############################################################################
option(FASTDDS_STATISTICS "Enable Fast DDS Statistics Module" OFF)

###############################################################################
# Compile library.
###############################################################################
add_subdirectory(src/cpp)

###############################################################################
# Add http://optionparser.sourceforge.net/ as unified cli parser 
###############################################################################
add_subdirectory(thirdparty/optionparser)

###############################################################################
# Testing options
###############################################################################
enable_testing()
include(CTest)
add_subdirectory(test)

###############################################################################
# Examples
###############################################################################
option(COMPILE_EXAMPLES "Build example" OFF)

if(EPROSIMA_BUILD)
    set(COMPILE_EXAMPLES ON)
endif()

if(COMPILE_EXAMPLES)
    add_subdirectory(examples)
endif()

###############################################################################
# Fuzzers
###############################################################################
if(DEFINED ENV{LIB_FUZZING_ENGINE})
    add_subdirectory(fuzz)
endif()

###############################################################################
# Tools
###############################################################################

if(COMPILE_TOOLS)
    add_subdirectory(tools)
endif()

###############################################################################
# Documentation
###############################################################################
# Add an option to toggle the generation of the API documentation.
option(BUILD_DOCUMENTATION "Use doxygen to create product documentation" OFF)
option(CHECK_DOCUMENTATION "Use doxygen to check code documentation" OFF)

if(CHECK_DOCUMENTATION)
    set(BUILD_DOCUMENTATION ON)
endif()

if(BUILD_DOCUMENTATION)
    find_package(Doxygen)
    if(NOT DOXYGEN_FOUND)
        message(FATAL_ERROR "doxygen is needed to build the documentation. Please install it correctly")
    endif()
    if(UNIX)
        find_program(DOXYFILE_MAKE make)
        if(DOXYFILE_MAKE)
            message(STATUS "Found Make: ${DOXYFILE_MAKE}")
        else()
            message(FATAL_ERROR "make is needed to build the documentation. Please install it correctly")
        endif()
    elseif(WIN32)
        set(DOXYFILE_MAKE make.bat)
    endif()

    if(NOT CHECK_DOCUMENTATION)
        find_program(UNZIP_EXE unzip)
        if(UNZIP_EXE)
            message(STATUS "Found Unzip: ${UNZIP_EXE}")
        else()
            message(FATAL_ERROR "unzip is needed to build the documentation. Please install it correctly")
        endif()
    endif()

    # Target to create documentation directories
    add_custom_target(docdirs
        COMMAND ${CMAKE_COMMAND} -E make_directory ${PROJECT_BINARY_DIR}/doc
        COMMENT "Creating documentation directory" VERBATIM)

    ### Doxygen ########################3
    if(CHECK_DOCUMENTATION)
        set(USE_DOT NO)
    else()
        set(USE_DOT YES)
    endif()
    # Configure the template doxyfile for or specific project
    configure_file(doxyfile.in ${PROJECT_BINARY_DIR}/doxyfile @ONLY IMMEDIATE)
    # Add custom target to run doxygen when ever the project is build
    add_custom_target(doxygen
        COMMAND "${DOXYGEN_EXECUTABLE}" "${PROJECT_BINARY_DIR}/doxyfile"
        SOURCES "${PROJECT_BINARY_DIR}/doxyfile"
        COMMENT "Generating API documentation with doxygen" VERBATIM)

    add_dependencies(doxygen docdirs)

    ### README html ########################

    if(WIN32)
        set(README_LOCATION "${PROJECT_BINARY_DIR}/")
        set(README_LOCATION_PREFFIX "doc/")
        set(README_INSTALL_LOCATION ".")
    else()
        set(README_LOCATION "${PROJECT_BINARY_DIR}/doc/")
        set(README_INSTALL_LOCATION "${DOC_INSTALL_DIR}")
    endif()

    configure_file(doc/README.html.in ${README_LOCATION}/README.html @ONLY IMMEDIATE)

    ### ReadTheDocs ########################
    if(NOT CHECK_DOCUMENTATION)

        file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/readthedocs_custom_template.cmake [=[

            file(DOWNLOAD "https://fast-dds.docs.eprosima.com/_/downloads/en/v${PROJECT_VERSION}/htmlzip/" "./eprosima-fast-rtps.zip")
            # TODO: when windows ci CMake version surpasses 17 favor file() instead of UNZIP as in the next line
            # file(ARCHIVE_EXTRACT INPUT "./eprosima-fast-rtps.zip" DESTINATION  "${PROJECT_BINARY_DIR}/doc/")
            execute_process(COMMAND "${UNZIP_EXE}" "./eprosima-fast-rtps.zip" -d "${PROJECT_BINARY_DIR}/doc/")
            file(REMOVE_RECURSE "${PROJECT_BINARY_DIR}/doc/manual")
            file(RENAME "${PROJECT_BINARY_DIR}/doc/eprosima-fast-rtps-v${PROJECT_VERSION}" "${PROJECT_BINARY_DIR}/doc/manual")
            file(REMOVE  "./eprosima-fast-rtps.zip")

            ]=])

        configure_file(${CMAKE_CURRENT_BINARY_DIR}/readthedocs_custom_template.cmake  ${CMAKE_CURRENT_BINARY_DIR}/readthedocs_custom.cmake)

        add_custom_target(readthedocs
            COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/readthedocs_custom.cmake 
            )

        add_dependencies(readthedocs docdirs)
    endif()

    add_custom_target(doc ALL
        COMMENT "Generated project documentation" VERBATIM)

    add_dependencies(doc doxygen)
    if(NOT CHECK_DOCUMENTATION)
        add_dependencies(doc readthedocs)
    endif()
endif()

###############################################################################
# Packaging
###############################################################################
# Install licenses
install(FILES ${PROJECT_SOURCE_DIR}/LICENSE
    DESTINATION ${LICENSE_INSTALL_DIR}
    COMPONENT licenses
    )

option(INSTALL_EXAMPLES "Install example" OFF)

if(INSTALL_EXAMPLES)
  # Install examples
  install(DIRECTORY ${PROJECT_SOURCE_DIR}/examples/cpp
      DESTINATION examples/
      COMPONENT examples
      PATTERN "examples/CMakeLists.txt" EXCLUDE
      )
endif()

option(INSTALL_TOOLS "Install tools" OFF)

if(INSTALL_TOOLS)
  # Install tools
  install(DIRECTORY ${PROJECT_SOURCE_DIR}/tools
      DESTINATION tools/
      COMPONENT tools
      PATTERN "tools/CMakeLists.txt" EXCLUDE
      )
endif()

if(BUILD_DOCUMENTATION)

    # Instalation of doxygen files
    install(DIRECTORY ${PROJECT_BINARY_DIR}/doc/api_reference
        DESTINATION ${DOC_INSTALL_DIR}
        COMPONENT documentation
        )

    install(FILES "${README_LOCATION}/README.html"
        DESTINATION ${README_INSTALL_LOCATION}
        COMPONENT documentation
        )

    if(NOT CHECK_DOCUMENTATION)
        install(DIRECTORY ${PROJECT_BINARY_DIR}/doc/manual
            DESTINATION ${DOC_INSTALL_DIR}
            COMPONENT documentation
            )
    endif()
endif()
