INCLUDE(GetPrerequisites)

SET(TULIP_NATIVE_PYTHON_PATH "${CWD}/tulip/native")

SET(TULIP_NATIVE_PYTHON_MODULE "${TULIP_NATIVE_PYTHON_PATH}/_tulip.pyd")

STRING(REPLACE ";" "\;" LIBRARY_PATHS "${LIBRARY_PATHS}")

SET(DIRS "${TULIP_NATIVE_PYTHON_PATH}\;${LIBRARY_PATHS}")

MESSAGE("Gathering dll dependencies for tulip Python module ...")

# Get top level prerequisites (no recursion as it fails with python >= 3.4)
GET_PREREQUISITES(${TULIP_NATIVE_PYTHON_MODULE} TULIP_NATIVE_PYTHON_MODULE_TL_DEPS 1 0 "" ${DIRS})

# The DLL_DEP_RESOLVED variable is not set when calling GP_RESOLVE_ITEM
# even if the item is correctly resolved (I added some debug messages to GetPrerequisites.cmake to verify).
# My guess is PARENT_SCOPE is not honored when executing cmake in script mode ($ cmake -P ...).
# Hopefully, CMake provides a hook mechanism called at the end of the GP_RESOLVE_ITEM process
# that enables us to get the resolved item

# Store the resolved top level items for the tulip module in an environment variable (as PARENT_SCOPE does not seem
# to work when executing CMake in script mode ($ cmake -P ...)
FUNCTION(gp_resolve_item_override context item exepath dirs resolved_item_var resolved)
  IF(DEFINED ENV{TULIP_NATIVE_PYTHON_MODULE_DEPS})
   SET(ENV{TULIP_NATIVE_PYTHON_MODULE_DEPS} "$ENV{TULIP_NATIVE_PYTHON_MODULE_DEPS};${${resolved_item_var}}")
  ELSE()
   SET(ENV{TULIP_NATIVE_PYTHON_MODULE_DEPS} "${${resolved_item_var}}")
  ENDIF()
ENDFUNCTION()

# Append the top level prerequisites items to the TULIP_NATIVE_PYTHON_MODULE_DEPS list
# and resolve them (get their absolute path)
FOREACH(DLL_DEP ${TULIP_NATIVE_PYTHON_MODULE_TL_DEPS})
  IF(NOT "${DLL_DEP}" MATCHES "^python[0-9][0-9].dll$")
    LIST(APPEND TULIP_NATIVE_PYTHON_MODULE_DEPS ${DLL_DEP})
    GP_RESOLVE_ITEM(${TULIP_NATIVE_PYTHON_MODULE} ${DLL_DEP} "" ${DIRS} DLL_DEP_RESOLVED)
  ENDIF()
ENDFOREACH()

FUNCTION(gp_resolve_item_override context item exepath dirs resolved_item_var resolved)
ENDFUNCTION()

# Get recursively prerequisites of top level prerequisites and append them to the TULIP_NATIVE_PYTHON_MODULE_DEPS list
FOREACH(DLL_DEP $ENV{TULIP_NATIVE_PYTHON_MODULE_DEPS})
  GET_PREREQUISITES(${DLL_DEP} DLL_DEP_DEPS 1 1 "" ${DIRS})
  FOREACH(DLL_DEP_DEP ${DLL_DEP_DEPS})
    LIST(APPEND TULIP_NATIVE_PYTHON_MODULE_DEPS ${DLL_DEP_DEP})
  ENDFOREACH()
ENDFOREACH()

# Remove duplicate entries in the TULIP_NATIVE_PYTHON_MODULE_DEPS list
LIST(REMOVE_DUPLICATES TULIP_NATIVE_PYTHON_MODULE_DEPS)

FUNCTION(gp_resolve_item_override context item exepath dirs resolved_item_var resolved)
  IF(NOT EXISTS "${TULIP_NATIVE_PYTHON_PATH}/${item}")
    MESSAGE("Copying ${item} inside tulip Python module native folder")
    FILE(COPY ${${resolved_item_var}} DESTINATION ${TULIP_NATIVE_PYTHON_PATH})
  ENDIF()
ENDFUNCTION()

# Finally, resolve all prerequisites for the tulip Python module and copy them to the module native folder
FOREACH(DLL_DEP ${TULIP_NATIVE_PYTHON_MODULE_DEPS})
  GP_RESOLVE_ITEM(${TULIP_NATIVE_PYTHON_MODULE} ${DLL_DEP} "" ${DIRS} DLL_DEP_RESOLVED)
ENDFOREACH()