# @author Lukas Heiligenbrunner
# main CMake file
#
# Build lib dependencies:
## libcurl (with sources)
## libconfig (with sources)
#
# documenation build needs doxygen to be installed.

cmake_minimum_required(VERSION 3.13)
project(iprefresher DESCRIPTION "Dynu ip refresher")

SET(CMAKE_CXX_STANDARD 17)

SET(CMAKE_BUILD_TYPE Release) # manually SET build type (Release / Debug)
SET(LIB_METHOD STATIC) #SHARED / STATIC
SET(PROJECT_VERSION 1.3.1-dev)
option(BUILD_DOC "Build documentation" ON)

SET(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

# config libs
message(STATUS "Config of Libraries")
# libcurl
find_package(CURL REQUIRED)
if (CURL_FOUND)
    message(STATUS "Found CURL version: ${CURL_VERSION_STRING}")
    message(STATUS "Using CURL include dir(s): ${CURL_INCLUDE_DIRS}")
    message(STATUS "Using CURL lib(s): ${CURL_LIBRARIES}")
else ()
    message(FATAL_ERROR "Could not find CURL")
endif ()
include_directories(${CURL_INCLUDE_DIR} inc)

# libconfig
FIND_PATH(LIBCONFIG_INCLUDE_DIR libconfig.h++ /usr/include /usr/local/include) # search for libconfig include headers
FIND_LIBRARY(CONFIG++_LIBRARY NAMES config++ PATH /usr/lib /usr/local/lib) # search for actual lib

IF (CONFIG++_LIBRARY AND LIBCONFIG_INCLUDE_DIR)
    MESSAGE(STATUS "Found Config++: ${CONFIG++_LIBRARY}")
ELSE (CONFIG++_LIBRARY AND LIBCONFIG_INCLUDE_DIR)
    IF (NOT LIBCONFIG_INCLUDE_DIR)
        MESSAGE(FATAL_ERROR "Could not find LibConfig++ header file! Try to install 'libconfig-devel'")
    ENDIF (NOT LIBCONFIG_INCLUDE_DIR)

    IF (NOT CONFIG++_LIBRARY)
        MESSAGE(FATAL_ERROR "Could not find LibConfig++ library file! Try to install 'libconfig'")
    ENDIF (NOT CONFIG++_LIBRARY)
ENDIF (CONFIG++_LIBRARY AND LIBCONFIG_INCLUDE_DIR)

include_directories(${LIBCONFIG_INCLUDE_DIR})

message("")

#read sample config
FILE(READ ${CMAKE_SOURCE_DIR}/config/iprefresher.cfg SAMPLECONFIG)
#add version header
FILE(WRITE ${CMAKE_SOURCE_DIR}/inc/Version.h
        "\#pragma once
#include <string>
namespace Version {
  const std::string VERSION = \"${PROJECT_VERSION}\";
  const std::string SAMPLECONFIG = R\"(${SAMPLECONFIG})\";
}"
        )

# generate post script for checking if configuration already exists
FILE(WRITE ${CMAKE_SOURCE_DIR}/postinst
        "#!/bin/bash
if [ ! -f /etc/iprefresher.cfg ]; then
    cat > /etc/iprefresher.cfg <<- EOM
${SAMPLECONFIG}EOM
fi\n"
        )

add_library(api ${LIB_METHOD}
        src/api/API.cpp
        src/api/TelegramAPI.cpp
        src/api/DynuAPI.cpp
        src/api/IPAPI.cpp)

add_library(logger ${LIB_METHOD}
        src/FileLogger.cpp
        src/Logger.cpp)


SET(SOURCE
        src/main.cpp
        src/IPRefresher.cpp
        src/Config.cpp)

add_executable(iprefresher ${SOURCE})

# LINK generated LIBS #
target_link_libraries(iprefresher api logger ${CURL_LIBRARIES} config++)

# INSTALL to SYSTEM #
SET(CMAKE_INSTALL_PREFIX "/")
# install binaries
install(TARGETS iprefresher DESTINATION usr/bin)
# install systemd service and enable it
install(FILES service/iprefresher.service DESTINATION lib/systemd/system)


IF (UNIX)
    message(STATUS "config of Package build")
    SET(CPACK_DEB_COMPONENT_INSTALL 1)
    SET(CPACK_OUTPUT_FILE_PREFIX packages)
    SET(CPACK_PACKAGING_INSTALL_PREFIX "/") # no prefix for package structure

    FIND_PROGRAM(RPMBUILD_EXECUTABLE rpmbuild)
    FIND_PROGRAM(DEB_EXECUTABLE dpkg)

    SET(CPACK_GENERATOR "TGZ;TBZ2")

    #check if rpm build is possible
    if (NOT ${RPMBUILD_EXECUTABLE} STREQUAL "RPMBUILD_EXECUTABLE-NOTFOUND")
        message(STATUS "found rpm build executeable --> able to build rpm")
        SET(CPACK_GENERATOR "${CPACK_GENERATOR};RPM")
        SET(CPACK_RPM_POST_INSTALL_SCRIPT_FILE "${CMAKE_CURRENT_SOURCE_DIR}/postinst")
        SET(CPACK_RPM_EXCLUDE_FROM_AUTO_FILELIST_ADDITION "/lib/systemd/system" "/lib/systemd" "/lib" "/usr/local/bin" "/usr/local") # --> needed to not override existing folders
        set(CPACK_RPM_PACKAGE_REQUIRES "libcurl,libconfig")
    else (NOT ${RPMBUILD_EXECUTABLE} STREQUAL "RPMBUILD_EXECUTABLE-NOTFOUND")
        message(STATUS "not found rpm build tools --> not building rpm")
    endif (NOT ${RPMBUILD_EXECUTABLE} STREQUAL "RPMBUILD_EXECUTABLE-NOTFOUND")

    #check if deb build is possible
    if (NOT ${DEB_EXECUTABLE} STREQUAL "DEB_EXECUTABLE-NOTFOUND")
        message(STATUS "found deb build tools --> able to build deb")
        SET(CPACK_GENERATOR "${CPACK_GENERATOR};DEB") # add deb generator
        set(CPACK_DEBIAN_PACKAGE_CONTROL_EXTRA "${CMAKE_CURRENT_SOURCE_DIR}/postinst") # set post inst file
        set(CPACK_DEBIAN_PACKAGE_DEPENDS "libcurl4,libconfig++9v5") # add debian dependencies
    else (NOT ${DEB_EXECUTABLE} STREQUAL "DEB_EXECUTABLE-NOTFOUND")
        message(STATUS "not found  deb build tools --> not building deb")
    endif (NOT ${DEB_EXECUTABLE} STREQUAL "DEB_EXECUTABLE-NOTFOUND")


    SET(CPACK_CMAKE_GENERATOR "Unix Makefiles")
    SET(CPACK_SOURCE_GENERATOR "TGZ;TBZ2")

    SET(CPACK_PACKAGE_DESCRIPTION "IPrefresher to refresh Dynu ip address and notify user via Telegram")
    SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY "IPrefresher to refresh Dynu ip address and notify user via Telegram")
    SET(CPACK_PACKAGE_VENDOR "Lukas Heilgienbrunner")
    SET(CPACK_PACKAGE_VERSION "${PROJECT_VERSION}")
    SET(CPACK_SOURCE_PACKAGE_FILE_NAME "${CMAKE_PROJECT_NAME}-${PROJECT_VERSION}")
    SET(CPACK_PACKAGE_CONTACT "Lukas Heiligenbrunner <lukas.heiligenbrunner@gmail.com>")
    SET(CPACK_PACKAGE_SECTION "games")

    INCLUDE(CPack)

    add_custom_target(build-linux-packages
            "${CMAKE_COMMAND}" --build "${CMAKE_BINARY_DIR}" --target package
            DEPENDS ${PROJECT_NAME}
            COMMENT "Installing ${PROJECT_NAME}")
    message("")
ENDIF (UNIX)

# check if Doxygen is installed
if (BUILD_DOC)
    message(STATUS "config of DOxygen build")
    find_package(Doxygen)
    if (DOXYGEN_FOUND)
        # SET input and output files
        SET(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/docs/Doxyfile.in)
        SET(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)

        # request to configure the file
        configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)

        # note the option ALL which allows to build the docs together with the application
        add_custom_target(doc_doxygen ALL
                COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
                WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
                COMMENT "Generating API documentation with Doxygen"
                VERBATIM)
        message(STATUS "Successfully configured doxygen")
    else (DOXYGEN_FOUND)
        message(STATUS "Doxygen need to be installed to generate the doxygen documentation")
    endif (DOXYGEN_FOUND)
    message("")
endif (BUILD_DOC)