# Copyright(c) 2017 Intel Corporation

# 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.


if(NOT DEFINED _bs_include_base_utils)
  set(_bs_include_base_utils TRUE)

  # bs_set_if_undefined - If not defined, assign value from env or arg
  macro(bs_set_if_undefined VAR_NAME VAR_VALUE)
    if(DEFINED ${VAR_NAME} AND NOT ${VAR_NAME} STREQUAL "")
      # Already defined
    elseif(DEFINED ENV{VAR_NAME} AND NOT "$ENV{VAR_NAME}" STREQUAL "")
      set(${VAR_NAME} "$ENV{VAR_NAME}")
    else()
      set(${VAR_NAME} "${VAR_VALUE}")
    endif()
  endmacro()

  macro(bs_compare_build_type _bs_compare_var)
    if ("${_bs_compare_var}" STREQUAL "Release" OR "${_bs_compare_var}" STREQUAL "release")
        set(T_CMAKE_BUILD_TYPE "Release")
        set(BUILD_TYPE "release")
    elseif ("${_bs_compare_var}" STREQUAL "ReleaseInternal" OR "${_bs_compare_var}" STREQUAL "release-internal" OR 
            "${_bs_compare_var}" STREQUAL "Release-Internal")
        set(T_CMAKE_BUILD_TYPE "ReleaseInternal")
        set(BUILD_TYPE "release-internal")
    elseif ("${_bs_compare_var}" STREQUAL "Debug" OR "${_bs_compare_var}" STREQUAL "debug")
        set(T_CMAKE_BUILD_TYPE "Debug")
        set(BUILD_TYPE "debug")
    elseif ("${_bs_compare_var}" STREQUAL "RelWithDebInfo" OR "${_bs_compare_var}" STREQUAL "RELWITHDEBINFO" OR
            "${_bs_compare_var}" STREQUAL "relwithdebinfo")
        set(T_CMAKE_BUILD_TYPE "RelWithDebInfo")
        set(BUILD_TYPE "RelWithDebInfo")
    elseif ("${_bs_compare_var}" STREQUAL "MinSizeRel" OR "${_bs_compare_var}" STREQUAL "MINSIZEREL" OR
            "${_bs_compare_var}" STREQUAL "minsizerel")
        set(T_CMAKE_BUILD_TYPE "MinSizeRel")
        set(BUILD_TYPE "MinSizeRel")
    else()
	#Pass the flag as received from user, Could be a custom flag setting
        message("Build Type: ${_bs_compare_var} is a custom build type")
        set(T_CMAKE_BUILD_TYPE "${_bs_compare_var}")
        set(BUILD_TYPE "${_bs_compare_var}")
    endif()  
  endmacro()  

  set(_bs_check_build_type_done 0)

  # function bs_check_build_type
  # Deal with the ambiguity of the three different variables for BUILD_TYPE:
  # Give them priority in this order:
  #   UFO_BUILD_TYPE
  #   BUILD_TYPE
  # Note: Despite the similarity of name, CMAKE_BUILD_TYPE is not analogous
  # to UFO_BUILD_TYPE and BUILD_TYPE.
  function(bs_check_build_type)

    if(DEFINED CMAKE_BUILD_TYPE AND NOT "${CMAKE_BUILD_TYPE}" STREQUAL ""
        AND NOT "${CMAKE_BUILD_TYPE}" STREQUAL "None")

	set(_bs_check_build_type_done 1 PARENT_SCOPE)

        bs_compare_build_type("${CMAKE_BUILD_TYPE}")
	set(CMAKE_BUILD_TYPE "${T_CMAKE_BUILD_TYPE}" PARENT_SCOPE) #set in parent scope
	set(CMAKE_BUILD_TYPE "${T_CMAKE_BUILD_TYPE}") #set in current scope

	set(BUILD_TYPE "${BUILD_TYPE}" PARENT_SCOPE)

	message(STATUS "Single-configuration generator. Build type : ${CMAKE_BUILD_TYPE}")

    elseif(DEFINED BUILD_TYPE AND NOT "${BUILD_TYPE}" STREQUAL "")

	    set(_bs_check_build_type_done 1 PARENT_SCOPE)

	    bs_compare_build_type("${BUILD_TYPE}")
	    set(CMAKE_BUILD_TYPE "${T_CMAKE_BUILD_TYPE}" PARENT_SCOPE) #set in parent scope
	    set(CMAKE_BUILD_TYPE "${T_CMAKE_BUILD_TYPE}") #set in current scope
            set(BUILD_TYPE "${BUILD_TYPE}" PARENT_SCOPE)

	    message(STATUS "Single-configuration generator. Build type : ${CMAKE_BUILD_TYPE}")

    else()
	    # If Build Type is not passed, Set as release builds as default
        if(NOT ${_bs_check_build_type_done})
            set(_bs_check_build_type_done 1 PARENT_SCOPE)
            set(_bs_bt_var_names UFO_BUILD_TYPE BUILD_TYPE)
            foreach(_bs_bt_var_a ${_bs_bt_var_names})
                foreach(_bs_bt_var_b ${_bs_bt_var_names})
                  if(NOT _bs_bt_var_a STREQUAL _bs_bt_var_b)
                    if(DEFINED ${_bs_bt_var_a} AND DEFINED ${_bs_bt_var_b} AND NOT ${_bs_bt_var_a} STREQUAL ${_bs_bt_var_b})
                        message(FATAL_ERROR "Conflict: ${_bs_bt_var_a}=${${_bs_bt_var_a}} vs ${_bs_bt_var_b=${${_bs_bt_var_b}}}")
                    endif()
                  endif()
                endforeach()
            endforeach()
            set(_bs_bt_value "")
            foreach(_bs_bt_var_a ${_bs_bt_var_names})
                if(DEFINED ${_bs_bt_var_a})
                    set(_bs_bt_value ${${_bs_bt_var_a}})
                    break()
                endif()
            endforeach()

            if(_bs_bt_value STREQUAL "")
                message("*BUILD_TYPE not defined, default to: release")
                set(_bs_bt_value "release")
            endif()

            foreach(_bs_bt_var_a ${_bs_bt_var_names})
                if(NOT DEFINED ${_bs_bt_var_a})
                  set(${_bs_bt_var_a} "${_bs_bt_value}" PARENT_SCOPE)
                endif()
            endforeach()
        endif()

    endif()

  endfunction(bs_check_build_type)
endif(NOT DEFINED _bs_include_base_utils)