cmake_minimum_required(VERSION 3.16 FATAL_ERROR)

# ---- Project ----

# Note: update this to your new project's name and version
project(xbasic VERSION 1.0 LANGUAGES CXX)

# ---- Include guards ----

if (PROJECT_SOURCE_DIR STREQUAL PROJECT_BINARY_DIR)
    message(FATAL_ERROR "In-source builds not allowed.
        Please make a new directory (called a build directory) and run CMake from there.")
endif ()

set(EXECUTABLE_NAME xbasic)

# Configuration
# =============

include(GNUInstallDirs)
# We generate the kernel.json file, given the installation prefix and the executable name
configure_file(
        "${CMAKE_CURRENT_SOURCE_DIR}/share/jupyter/kernels/xbasic/kernel.json.in"
        "${CMAKE_CURRENT_SOURCE_DIR}/share/jupyter/kernels/xbasic/kernel.json")

option(XEUS_STATIC_DEPENDENCIES "link statically with xeus dependencies" OFF)
if (XEUS_STATIC_DEPENDENCIES)
    set(xeus_target "xeus-static")
else ()
    set(xeus_target "xeus")
endif ()

# Dependencies
# ============

# Be sure to use recent versions
set(xeus_REQUIRED_VERSION 0.19.1)
set(cppzmq_REQUIRED_VERSION 4.3.0)

find_package(xeus ${xeus_REQUIRED_VERSION} REQUIRED)
find_package(cppzmq ${cppzmq_REQUIRED_VERSION} REQUIRED)
find_package(Threads)


# Flags
# =====

include(CheckCXXCompilerFlag)

if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Intel")
    CHECK_CXX_COMPILER_FLAG("-std=c++17" HAS_CPP17_FLAG)
    if (HAS_CPP17_FLAG)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")
    else ()
        message(FATAL_ERROR "Unsupported compiler -- xeus requires C++17 support!")
    endif ()
endif ()

# Target and link
# ===============

if (NOT TARGET basic)
    add_subdirectory(libs/basic)
endif ()

# My kernel executable
add_executable(${EXECUTABLE_NAME} "")
target_sources(${EXECUTABLE_NAME} PRIVATE src/main.cc src/xbasic_interpreter.cpp)
target_include_directories(${EXECUTABLE_NAME}
        PRIVATE ${CMAKE_CURRENT_LIST_DIR}/include ${CMAKE_CURRENT_LIST_DIR}/libs/basic/include)
target_link_libraries(${EXECUTABLE_NAME} PRIVATE ${xeus_target} Threads::Threads basic)

if (APPLE)
    set_target_properties(${EXECUTABLE_NAME} PROPERTIES MACOSX_RPATH ON)
else ()
    set_target_properties(${EXECUTABLE_NAME} PROPERTIES
            BUILD_WITH_INSTALL_RPATH 1
            SKIP_BUILD_RPATH FALSE)
endif ()

set_target_properties(${EXECUTABLE_NAME} PROPERTIES INSTALL_RPATH_USE_LINK_PATH TRUE)

# Installation
# ============

# Install xbasic
install(TARGETS ${EXECUTABLE_NAME}
        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})

# Configuration and data directories for jupyter and xbasic
set(XJUPYTER_DATA_DIR "share/jupyter" CACHE STRING "Jupyter data directory")

# Install Jupyter kernelspecs
set(xbasicSPEC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/share/jupyter/kernels)
install(DIRECTORY ${xbasicSPEC_DIR}
        DESTINATION ${XJUPYTER_DATA_DIR}
        PATTERN "*.in" EXCLUDE)