#-------------------------------------------------------------------
# This file is part of the CMake build system for SKYX
#
# The contents of this file are placed in the public domain. Feel
# free to make use of it in any way you like.
#-------------------------------------------------------------------

# This file defines the Feature Logging macros.
#
# MACRO_LOG_FEATURE(VAR FEATURE DESCRIPTION URL [REQUIRED [MIN_VERSION [COMMENTS]]])
#   Logs the information so that it can be displayed at the end
#   of the configure run
#   VAR : TRUE or FALSE, indicating whether the feature is supported
#   FEATURE: name of the feature, e.g. "libjpeg"
#   DESCRIPTION: description what this feature provides
#   URL: home page
#   REQUIRED: TRUE or FALSE, indicating whether the featue is required
#   MIN_VERSION: minimum version number. empty string if unneeded
#   COMMENTS: More info you may want to provide.  empty string if unnecessary
#
# MACRO_DISPLAY_FEATURE_LOG()
#   Call this to display the collected results.
#   Exits CMake with a FATAL error message if a required feature is missing
#
# Example:
#
# INCLUDE(MacroLogFeature)
#
# FIND_PACKAGE(JPEG)
# MACRO_LOG_FEATURE(JPEG_FOUND "libjpeg" "Support JPEG images" "http://www.ijg.org" TRUE "3.2a" "")
# ...
# MACRO_DISPLAY_FEATURE_LOG()

# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
# Copyright (c) 2006, Allen Winter, <winter@kde.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.

IF (NOT _macroLogFeatureAlreadyIncluded)
	SET(_file ${SKYX_BINARY_DIR}/MissingRequirements.txt)
	IF (EXISTS ${_file})
		FILE(REMOVE ${_file})
	ENDIF (EXISTS ${_file})

	SET(_file ${SKYX_BINARY_DIR}/EnabledFeatures.txt)
	IF (EXISTS ${_file})
		FILE(REMOVE ${_file})
	ENDIF (EXISTS ${_file})

	SET(_file ${SKYX_BINARY_DIR}/DisabledFeatures.txt)
	IF (EXISTS ${_file})
		FILE(REMOVE ${_file})
	ENDIF (EXISTS ${_file})

	SET(_macroLogFeatureAlreadyIncluded TRUE)
ENDIF (NOT _macroLogFeatureAlreadyIncluded)


MACRO(MACRO_LOG_FEATURE _var _package _description _url)
	SET(_required "${ARGV4}")
	SET(_minvers "${ARGV5}")
	SET(_comments "${ARGV6}")

	IF (${_var})
		SET(_LOGFILENAME ${SKYX_BINARY_DIR}/EnabledFeatures.txt)
	ELSE (${_var})
		IF (${_required} MATCHES "[Tt][Rr][Uu][Ee]")
			SET(_LOGFILENAME ${SKYX_BINARY_DIR}/MissingRequirements.txt)
		ELSE (${_required} MATCHES "[Tt][Rr][Uu][Ee]")
			SET(_LOGFILENAME ${SKYX_BINARY_DIR}/DisabledFeatures.txt)
		ENDIF (${_required} MATCHES "[Tt][Rr][Uu][Ee]")
	ENDIF (${_var})

	SET(_logtext "+ ${_package}")

	IF (NOT ${_var})
		IF (${_minvers} MATCHES ".*")
			SET(_logtext "${_logtext}, ${_minvers}")
		ENDIF (${_minvers} MATCHES ".*")			
		SET(_logtext "${_logtext}: ${_description} <${_url}>")
		IF (${_comments} MATCHES ".*")
			SET(_logtext "${_logtext}\n${_comments}")
		ENDIF (${_comments} MATCHES ".*")
#      SET(_logtext "${_logtext}\n") #double-space missing features?
	ENDIF (NOT ${_var})
	FILE(APPEND "${_LOGFILENAME}" "${_logtext}\n")
ENDMACRO(MACRO_LOG_FEATURE)


MACRO(MACRO_DISPLAY_FEATURE_LOG)
	SET(_file ${SKYX_BINARY_DIR}/MissingRequirements.txt)
	IF (EXISTS ${_file})
		FILE(READ ${_file} _requirements)
		MESSAGE(FATAL_ERROR "\n-----------------------------------------------------------------------------\n-- The following REQUIRED packages could NOT be located on your system.\n-- Please install them before continuing this software installation.\n-- If you are in Windows, try passing -DSKYX_DEPENDENCIES_DIR=<path to dependencies>\n-----------------------------------------------------------------------------\n${_requirements}-----------------------------------------------------------------------------")
		FILE(REMOVE ${_file})
		MESSAGE(FATAL_ERROR "Exiting: Missing Requirements")
	ENDIF (EXISTS ${_file})
	
	SET(_summary "\n")
	SET(_elist 0)
	SET(_file ${SKYX_BINARY_DIR}/EnabledFeatures.txt)
	
	IF (EXISTS ${_file})
		SET(_elist 1)
		FILE(READ ${_file} _enabled)
		FILE(REMOVE ${_file})
		SET(_summary "${_summary}-----------------------------------------------------------------------------\n-- The following external packages were located on your system.\n-- This installation will have the extra features provided by these packages.\n${_enabled}")
	ENDIF (EXISTS ${_file})

	SET(_dlist 0)
	SET(_file ${SKYX_BINARY_DIR}/DisabledFeatures.txt)

	IF (EXISTS ${_file})
		SET(_dlist 1)
		FILE(READ ${_file} _disabled)
		FILE(REMOVE ${_file})
		SET(_summary "${_summary}-----------------------------------------------------------------------------\n-- The following OPTIONAL packages could NOT be located on your system.\n-- Consider installing them to enable more features from this software.\n${_disabled}")
	ELSE (EXISTS ${_file})
		IF (${_elist})
			SET(_summary "${_summary}Congratulations! All external packages have been found.\n")
		ENDIF (${_elist})
	ENDIF (EXISTS ${_file})

	IF (${_elist} OR ${_dlist})
		SET(_summary "${_summary}-----------------------------------------------------------------------------\n")
	ENDIF (${_elist} OR ${_dlist})

	MESSAGE(STATUS "${_summary}")
ENDMACRO(MACRO_DISPLAY_FEATURE_LOG)