INCLUDE( FindPackageHandleStandardArgs )

# Checks an environment variable; note that the first check
# does not require the usual CMake $-sign.
IF( DEFINED ENV{ARGON2_DIR} )
	SET( ARGON2_DIR "$ENV{ARGON2_DIR}" )
ENDIF()

FIND_PATH(
		ARGON2_INCLUDE_DIR
		argon2.h
	HINTS
		ARGON2_DIR
)

FIND_LIBRARY( ARGON2_LIBRARY
	NAMES argon2
	HINTS ${ARGON2_DIR}
)

FIND_PACKAGE_HANDLE_STANDARD_ARGS( argon2 DEFAULT_MSG
	ARGON2_INCLUDE_DIR ARGON2_LIBRARY
)

IF( ARGON2_FOUND )
	SET( ARGON2_INCLUDE_DIRS ${ARGON2_INCLUDE_DIR} )
	SET( ARGON2_LIBRARIES ${ARGON2_LIBRARY} )

	MARK_AS_ADVANCED(
		ARGON2_LIBRARY
		ARGON2_INCLUDE_DIR
		ARGON2_DIR
	)

	add_library(argon2 SHARED IMPORTED)
	set_target_properties(argon2
		PROPERTIES
			INTERFACE_INCLUDE_DIRECTORIES "${ARGON2_INCLUDE_DIRS}"
	)

	set_target_properties(argon2
		PROPERTIES
			IMPORTED_LOCATION "${ARGON2_LIBRARY}"
			IMPORTED_IMPLIB "${ARGON2_LIBRARY}"
	)
ELSE()
	SET( ARGON2_DIR "" CACHE STRING
		"An optional hint to a directory for finding `argon2`"
	)
ENDIF()