# Copyright 2023 - David Minton
# This file is part of Cratermaker.
# Cratermaker is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License 
# as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
# Cratermaker is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty 
# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
# You should have received a copy of the GNU General Public License along with Cratermaker. 
# If not, see: https://www.gnu.org/licenses. 

SET(PERLIN_BIND perlin)
SET(MORPHOLOGY_BIND morphology)

# Find the Cython executable, but don't look in the cmake root directory (due how cmake and cython are installed on the RCAC system)
FIND_PROGRAM(CYTHON 
            NAMES "cython" 
            NO_CMAKE_PATH
            NO_CMAKE_ENVIRONMENT_PATH
            NO_CMAKE_SYSTEM_PATH
            NO_CMAKE_FIND_ROOT_PATH
            )
MESSAGE(STATUS "Cython executable path: ${CYTHON}")
SET(PERLIN_ARGS "${CMAKE_CURRENT_SOURCE_DIR}/${PERLIN_BIND}.pyx" "--output-file" "${CMAKE_CURRENT_BINARY_DIR}/${PERLIN_BIND}.c")
SET(MORPHOLOGY_ARGS "${CMAKE_CURRENT_SOURCE_DIR}/${MORPHOLOGY_BIND}.pyx" "--output-file" "${CMAKE_CURRENT_BINARY_DIR}/${MORPHOLOGY_BIND}.c")
STRING(TOUPPER "${CMAKE_BUILD_TYPE}" BT)
IF (BT STREQUAL "DEBUG")
    LIST(APPEND PERLIN_ARGS "--gdb")
    LIST(APPEND MORPHOLOGY_ARGS "--gdb")
endif ()
ADD_CUSTOM_COMMAND(
  OUTPUT "${PERLIN_BIND}.c"
  DEPENDS "${PERLIN_BIND}.pyx"
  VERBATIM
  COMMAND "${CYTHON}" ${PERLIN_ARGS} )

ADD_CUSTOM_COMMAND(
  OUTPUT "${MORPHOLOGY_BIND}.c"
  DEPENDS "${MORPHOLOGY_BIND}.pyx"
  VERBATIM
  COMMAND "${CYTHON}" ${MORPHOLOGY_ARGS} )  

PYTHON_ADD_LIBRARY(${PERLIN_BIND} MODULE "${CMAKE_CURRENT_BINARY_DIR}/${PERLIN_BIND}.c" WITH_SOABI)
PYTHON_ADD_LIBRARY(${MORPHOLOGY_BIND} MODULE "${CMAKE_CURRENT_BINARY_DIR}/${MORPHOLOGY_BIND}.c" WITH_SOABI)

EXECUTE_PROCESS(
  COMMAND "${Python_EXECUTABLE}"
  -c "import numpy; print(numpy.get_include())"
  OUTPUT_VARIABLE NUMPY_INCLUDE_DIR
  OUTPUT_STRIP_TRAILING_WHITESPACE
)

TARGET_LINK_LIBRARIES(${PERLIN_BIND} PUBLIC ${CRATERMAKER_LIBRARY})
TARGET_LINK_LIBRARIES(${MORPHOLOGY_BIND} PUBLIC ${CRATERMAKER_LIBRARY})
TARGET_INCLUDE_DIRECTORIES(${PERLIN_BIND} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR} ${NUMPY_INCLUDE_DIR})
TARGET_INCLUDE_DIRECTORIES(${MORPHOLOGY_BIND} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR} ${NUMPY_INCLUDE_DIR})

# Define the install locations
INSTALL(TARGETS ${PERLIN_BIND} ${MORPHOLOGY_BIND} LIBRARY DESTINATION ${INSTALL_CYTHON})