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# SPDX-License-Identifier: BSD-3-Clause

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cmake_minimum_required(VERSION 3.15)
project(tensor)

# Find Python
find_package(Python COMPONENTS Interpreter Development REQUIRED)
find_package(Python3 COMPONENTS Interpreter Development REQUIRED)

# Get Python site-packages directory using Python
execute_process(
    COMMAND ${Python3_EXECUTABLE} -c "import sys, sysconfig; print(';'.join([sysconfig.get_paths()['purelib'],sysconfig.get_paths(vars={'base': sys.base_prefix, 'platbase': sys.base_prefix})['purelib']]))"
    OUTPUT_VARIABLE Python_SITE_PACKAGES_PATHS
    OUTPUT_STRIP_TRAILING_WHITESPACE
)

message(STATUS "Python site-packages directories: ${Python_SITE_PACKAGES_PATHS}")

# Add nanobind path to CMAKE_PREFIX_PATH
foreach(path IN LISTS Python_SITE_PACKAGES_PATHS)
    if(EXISTS "${path}/nanobind/cmake")
        message(STATUS "Adding nanobind cmake path: ${path}/nanobind/cmake")
        list(APPEND CMAKE_PREFIX_PATH "${path}/nanobind/cmake")
        break()
    endif()
endforeach()

# Find nanobind
find_package(nanobind)
if(NOT nanobind_FOUND)
    message(FATAL_ERROR
        "nanobind not found!\n"
        "Please install nanobind with: pip install nanobind\n"
    )
endif()

# Add the module
nanobind_add_module(tensor tensor.cpp)