from enum import IntEnum

class FaceType(IntEnum):
    HALF = 0,
    FULL = 1,
    HEAD = 2,
    
    FULL_NO_ALIGN = 5,
    MARK_ONLY = 10, #no align at all, just embedded faceinfo
    
    @staticmethod
    def fromString (s):
        r = from_string_dict.get (s.lower())
        if r is None:
            raise Exception ('FaceType.fromString value error')
        return r

    @staticmethod
    def toString (face_type):
        return to_string_dict[face_type]

from_string_dict = {'half_face': FaceType.HALF,
                    'full_face': FaceType.FULL,
                    'head' : FaceType.HEAD,
                    'mark_only' : FaceType.MARK_ONLY,
                    'full_face_no_align' : FaceType.FULL_NO_ALIGN,
                    }
to_string_dict = { FaceType.HALF : 'half_face',
                   FaceType.FULL : 'full_face',
                   FaceType.HEAD : 'head',
                   FaceType.MARK_ONLY :'mark_only',
                   FaceType.FULL_NO_ALIGN : 'full_face_no_align'                   
                 }