# Copyright (c) 2017, ArrayFire
# All rights reserved.
#
# This file is distributed under 3-clause BSD license.
# The complete license agreement can be obtained at:
# http://arrayfire.com/licenses/BSD-3-Clause

# ArrayFire
# ---------
#
# IMPORTED Targets
# ^^^^^^^^^^^^^^^^
#
# This is the configuration file for the ArrayFire Library. It provides the
# following :prop_tgt:`IMPORTED` targets:
#
# ``ArrayFire::af``
#   Target for the ArrayFire Unified backend.
# ``ArrayFire::afcpu``
#   Target for the ArrayFire CPU backend.
# ``ArrayFire::afcuda``
#   Target for the ArrayFire CUDA backend.
# ``ArrayFire::afopencl``
#   Target for the ArrayFire OpenCL backend.
#
# These targets can be used to link with your application using the
# ``target_link_library`` command. Here is an example of how to use these
# targets in your application:
#
#   add_executable(mybinary source.cpp)
#   target_link_library(mybinary PRIVATE ArrayFire::afopencl)
#
# This example creates a mybinary executable from the source.cpp file and links
# against the OpenCL backend of ArrayFire library. Note you do *not* need to set
# the include directories as they are automatically included with the target.
#
# This is the recommended way of linking against ArrayFire
#
# Legacy Variables
# ^^^^^^^^^^^^^^^^
#
# Additionally, this config file creates the following variables for backward
# compatibility with legacy cmake files:
#
# ``ArrayFire_INCLUDE_DIRS``
#  Path to ArrayFire's include directory.
# ``ArrayFire_LIBRARIES``
#  ArrayFire's libraries. This will default to a GPU backend if one
#  is found.
# ``ArrayFire_FOUND``
#  True if ArrayFire has been located
#
# ``ArrayFire_CPU_FOUND``
#   True of the ArrayFire CPU library has been found.
# ``ArrayFire_CPU_LIBRARIES``
#   Location of ArrayFire's CPU library, if found
#
# ``ArrayFire_CUDA_FOUND``
#   True of the ArrayFire CUDA library has been found.
# ``ArrayFire_CUDA_LIBRARIES``
#   Location of ArrayFire's CUDA library, if found
#
# ``ArrayFire_OpenCL_FOUND``
#   True of the ArrayFire OpenCL library has been found.
# ``ArrayFire_OpenCL_LIBRARIES``
#   Location of ArrayFire's OpenCL library, if found
#
# ``ArrayFire_Unified_FOUND``
#   True of the ArrayFire Unified library has been found.
# ``ArrayFire_Unified_LIBRARIES``
#   Location of ArrayFire's Unified library, if found
#
# It is recommended you use imported targets instead of these variables.
#
# You may provide a hint to where ArrayFire's root directory may be located
# by setting ArrayFire_DIR. You should not need to set this if you installed
# ArrayFire using the official installers or the package manager(please submit
# a bug report). If CMake is unable to locate ArrayFire then set the
# ArrayFire_DIR to the directory of this file.
#
# If you are trying to link against a source build then this should be set to
# the build directory.

@PACKAGE_INIT@

set_and_check(ArrayFire_INCLUDE_DIRS @PACKAGE_INCLUDE_DIRS@)

foreach(backend Unified CPU OpenCL CUDA)
  if(backend STREQUAL "Unified")
    set(lowerbackend "")
  else()
    string(TOLOWER "${backend}" lowerbackend)
  endif()

  string(TOUPPER "${backend}" upperbackend)
  if(NOT TARGET ArrayFire::af${lowerbackend} AND NOT TARGET af${lowerbackend})
    # Either we are not in the ArrayFire project or the target was not built
    if(EXISTS @PACKAGE_CMAKE_DIR@/ArrayFire${backend}Targets.cmake)
      include(@PACKAGE_CMAKE_DIR@/ArrayFire${backend}Targets.cmake)
    endif()
  endif()
  if(TARGET ArrayFire::af${lowerbackend})
    get_property(all_config TARGET ArrayFire::af${lowerbackend} PROPERTY IMPORTED_CONFIGURATIONS)
    foreach(config IN LISTS all_config)
      if(NOT all_config)
        set(all_config "NOCONFIG")
      endif()
      get_property(loc TARGET ArrayFire::af${lowerbackend} PROPERTY IMPORTED_LOCATION_${config})

      # break if any of the imported configurations exist. All configs write to the same
      # location so they are not working as CMake intended. Its fine for single config
      # installers like ours.
      if(EXISTS ${loc})
        set(ArrayFire_${backend}_BINARY_EXISTS TRUE)
        break()
      endif()
    endforeach()
  endif()

  if((TARGET ArrayFire::af${lowerbackend} AND ArrayFire_${backend}_BINARY_EXISTS) OR TARGET af${lowerbackend})
      set(ArrayFire_${backend}_FOUND ON)
      set(ArrayFire_${backend}_LIBRARIES ArrayFire::af${lowerbackend})
      set(ArrayFire_LIBRARIES ArrayFire::af${lowerbackend})
  else()
      set(ArrayFire_${backend}_FOUND OFF)
  endif()

  # If this project is built as part of the ArrayFire project, make sure the
  # backends are only enabled if the backend is selected to be built even if
  # the Binary exists.
  if(DEFINED AF_BUILD_${upperbackend} AND NOT AF_BUILD_${upperbackend})
    set(ArrayFire_${backend}_FOUND OFF)
  endif()
endforeach()

foreach(_comp ${ArrayFire_FIND_COMPONENTS})
  if (NOT ArrayFire_${_comp}_FOUND)
    set(ArrayFire_FOUND False)
    set(ArrayFire_NOT_FOUND_MESSAGE "Required ArrayFire component ${_comp} not found")
  endif()
endforeach()

check_required_components(CPU OpenCL CUDA Unified)
