cmake_minimum_required(VERSION 3.26)
project(${SKBUILD_PROJECT_NAME} LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_POSITION_INDEPENDENT_CODE On)

# Required packages.
find_package(Python COMPONENTS Interpreter Development.Module ${SKBUILD_SABI_COMPONENT} REQUIRED)
find_package(nanobind CONFIG REQUIRED)
find_package(VERILATOR CONFIG REQUIRED HINTS $ENV{VERILATOR_ROOT})

include(FetchContent)
FetchContent_Declare(
  fmt
  GIT_REPOSITORY https://github.com/fmtlib/fmt
  GIT_TAG        e69e5f977d458f2650bb346dadf2ad30c5320281 # 10.2.1
  EXCLUDE_FROM_ALL) 
  
FetchContent_MakeAvailable(fmt)

message("Found Python: ${Python_EXECUTABLE}")
message("Python Include: ${Python_INCLUDE_DIRS}")
message("Found Nanobind: ${nanobind_DIR}")
message("Found Verilator: ${verilator_DIR}")
message("Found DSPSim: ${dspsim_DIR}")

include(GNUInstallDirs)

# DSPSim libraries.
set(DSPSIM_PKG_DIR ${CMAKE_SOURCE_DIR}/src/dspsim)
set(DSPSIM_SRC_DIR ${CMAKE_SOURCE_DIR}/src)
set(DSPSIM_INCLUDE_DIR ${CMAKE_SOURCE_DIR}/src/dspsim/include)
set(DSPSIM_HDL_DIR ${CMAKE_SOURCE_DIR}/src/dspsim/hdl)

set(INSTALL_LIBDIR ${CMAKE_INSTALL_LIBDIR})
set(INSTALL_INCLUDEDIR ${CMAKE_INSTALL_INCLUDEDIR})
set(INSTALL_DATADIR ${CMAKE_INSTALL_DATADIR})
set(INSTALL_CMAKEDIR ${CMAKE_INSTALL_DATADIR}/cmake/dspsim)
set(INSTALL_HDLDIR hdl)

# Doing this makes shared libaries work. Libraries are installed at dspsim/lib in site-packages.
set(CMAKE_INSTALL_RPATH $ORIGIN/lib;$ORIGIN/lib64)

add_subdirectory(src)

# add_subdirectory(tests/cpp EXCLUDE_FROM_ALL)

# Install core library targets.
install(TARGETS dspsim-core
    EXPORT dspsim-core-targets
    ARCHIVE DESTINATION ${INSTALL_LIBDIR}
    LIBRARY DESTINATION ${INSTALL_LIBDIR}
    RUNTIME DESTINATION ${INSTALL_BINDIR}
    INCLUDES DESTINATION ${INSTALL_INCLUDEDIR})

install(EXPORT dspsim-core-targets
    FILE dspsim-core-targets.cmake
    NAMESPACE dspsim::
    DESTINATION ${INSTALL_CMAKEDIR})


# Install extension
install(TARGETS _framework
    LIBRARY DESTINATION ".")

# Install stubs
install(FILES 
  ${CMAKE_BINARY_DIR}/src/_framework.pyi
    DESTINATION ".")

# Install stubs in a local directory to help vscode fine type info with editable installs.
install(FILES
  ${CMAKE_BINARY_DIR}/src/_framework.pyi
  DESTINATION ${CMAKE_BINARY_DIR}/stubs/dspsim)

# Package config.
include(CMakePackageConfigHelpers)
configure_package_config_file(src/dspsim-config.cmake.in
  ${CMAKE_CURRENT_BINARY_DIR}/dspsim-config.cmake
  INSTALL_DESTINATION ${INSTALL_CMAKEDIR}
  PATH_VARS INSTALL_CMAKEDIR INSTALL_LIBDIR INSTALL_INCLUDEDIR INSTALL_HDLDIR)

write_basic_package_version_file(
  ${CMAKE_CURRENT_BINARY_DIR}/dspsim-config-version.cmake
  VERSION ${SKBUILD_PROJECT_VERSION}
  COMPATIBILITY SameMajorVersion)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/dspsim-config.cmake
              ${CMAKE_CURRENT_BINARY_DIR}/dspsim-config-version.cmake
              ${CMAKE_CURRENT_SOURCE_DIR}/src/dspsim-utils.cmake
        DESTINATION ${INSTALL_CMAKEDIR})
