###############################################################################
# Copyright (c) Advanced Micro Devices, Inc. All rights reserved.
#
# SPDX-License-Identifier: MIT
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
###############################################################################

###############################################################################
# DEFAULT BUILD TYPE
###############################################################################
set(CMAKE_BUILD_TYPE "Release" CACHE STRING
      "build type: Release, Debug, RelWithDebInfo, MinSizeRel")

###############################################################################
# DEPENDENCIES
###############################################################################

# Try to establish ROCM_PATH (for find_package)
#==================================================================================================
if(NOT DEFINED ROCM_PATH)
  # Guess default location
  set(ROCM_PATH "/opt/rocm")
  message(WARNING "Unable to find ROCM_PATH: Falling back to ${ROCM_PATH}")
else()
  message(STATUS "ROCM_PATH found: ${ROCM_PATH}")
endif()
set(ENV{ROCM_PATH} ${ROCM_PATH})

## Check for ROCm version

if(ROCM_PATH)
  message(STATUS "Reading ROCM version from ${ROCM_PATH}/.info/version")
  file(READ "${ROCM_PATH}/.info/version" rocm_version_string)
else()
  message(FATAL_ERROR "Could not determine ROCM version (set EXPLICIT_ROCM_VERSION or set ROCM_PATH to a valid installation)")
endif()
string(REGEX MATCH "([0-9]+)\\.([0-9]+)\\.([0-9]+)" rocm_version_matches ${rocm_version_string})
if (rocm_version_matches)
  set(ROCM_MAJOR_VERSION ${CMAKE_MATCH_1})
  set(ROCM_MINOR_VERSION ${CMAKE_MATCH_2})
  set(ROCM_PATCH_VERSION ${CMAKE_MATCH_3})

  message(STATUS "ROCm version: ${ROCM_MAJOR_VERSION}.${ROCM_MINOR_VERSION}.${ROCM_PATCH_VERSION}")
else()
  message(WARNING "Failed to extract ROCm version.")
endif()

foreach (root ${hip_ROOT} $ENV{hip_ROOT} ${ROCM_ROOT} $ENV{ROCM_ROOT} ${ROCM_PATH} $ENV{ROCM_PATH})
  if (IS_DIRECTORY ${root})
    list(PREPEND CMAKE_PREFIX_PATH ${root})
  endif()
endforeach()
if (NOT DEFINED CMAKE_CXX_COMPILER)
  find_program(CMAKE_CXX_COMPILER hipcc PATHS /opt/rocm)
endif()

###############################################################################
# GLOBAL COMPILE FLAGS
###############################################################################
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_FLAGS_DEBUG "-O0 -ggdb")

list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)