from numpy cimport ndarray

from .typedefs cimport attr_t, hash_t, flags_t, len_t, tag_t
from .attrs cimport attr_id_t
from .attrs cimport ID, ORTH, LOWER, NORM, SHAPE, PREFIX, SUFFIX, LENGTH, CLUSTER, LANG
from .structs cimport LexemeC, SerializedLexemeC
from .strings cimport StringStore
from .vocab cimport Vocab


cdef LexemeC EMPTY_LEXEME

cdef class Lexeme:
    cdef LexemeC* c
    cdef readonly Vocab vocab
    cdef readonly attr_t orth

    @staticmethod
    cdef inline Lexeme from_ptr(LexemeC* lex, Vocab vocab, int vector_length):
        cdef Lexeme self = Lexeme.__new__(Lexeme, vocab, lex.orth)
        self.c = lex
        self.vocab = vocab
        self.orth = lex.orth

    @staticmethod
    cdef inline SerializedLexemeC c_to_bytes(const LexemeC* lex) nogil:
        cdef SerializedLexemeC lex_data
        buff = <const unsigned char*>&lex.flags
        end = <const unsigned char*>&lex.sentiment + sizeof(lex.sentiment)
        for i in range(sizeof(lex_data.data)):
            lex_data.data[i] = buff[i]
        return lex_data

    @staticmethod
    cdef inline void c_from_bytes(LexemeC* lex, SerializedLexemeC lex_data) nogil:
        buff = <unsigned char*>&lex.flags
        end = <unsigned char*>&lex.sentiment + sizeof(lex.sentiment)
        for i in range(sizeof(lex_data.data)):
            buff[i] = lex_data.data[i]

    @staticmethod
    cdef inline void set_struct_attr(LexemeC* lex, attr_id_t name, attr_t value) nogil:
        if name < (sizeof(flags_t) * 8):
            Lexeme.c_set_flag(lex, name, value)
        elif name == ID:
            lex.id = value
        elif name == LOWER:
            lex.lower = value
        elif name == NORM:
            lex.norm = value
        elif name == SHAPE:
            lex.shape = value
        elif name == PREFIX:
            lex.prefix = value
        elif name == SUFFIX:
            lex.suffix = value
        elif name == CLUSTER:
            lex.cluster = value
        elif name == LANG:
            lex.lang = value

    @staticmethod
    cdef inline attr_t get_struct_attr(const LexemeC* lex, attr_id_t feat_name) nogil:
        if feat_name < (sizeof(flags_t) * 8):
            if Lexeme.c_check_flag(lex, feat_name):
                return 1
            else:
                return 0
        elif feat_name == ID:
            return lex.id
        elif feat_name == ORTH:
            return lex.orth
        elif feat_name == LOWER:
            return lex.lower
        elif feat_name == NORM:
            return lex.norm
        elif feat_name == SHAPE:
            return lex.shape
        elif feat_name == PREFIX:
            return lex.prefix
        elif feat_name == SUFFIX:
            return lex.suffix
        elif feat_name == LENGTH:
            return lex.length
        elif feat_name == CLUSTER:
            return lex.cluster
        elif feat_name == LANG:
            return lex.lang
        else:
            return 0

    @staticmethod
    cdef inline bint c_check_flag(const LexemeC* lexeme, attr_id_t flag_id) nogil:
        cdef flags_t one = 1
        if lexeme.flags & (one << flag_id):
            return True
        else:
            return False

    @staticmethod
    cdef inline bint c_set_flag(LexemeC* lex, attr_id_t flag_id, bint value) nogil:
        cdef flags_t one = 1
        if value:
            lex.flags |= one << flag_id
        else:
            lex.flags &= ~(one << flag_id)