# coding: utf-8
from __future__ import unicode_literals

from ...attrs import *

import pytest

@pytest.mark.parametrize('text1,prob1,text2,prob2', [("NOUN", -1, "opera", -2)])
def test_vocab_lexeme_lt(en_vocab, text1, text2, prob1, prob2):
    """More frequent is l.t. less frequent"""
    lex1 = en_vocab[text1]
    lex1.prob = prob1
    lex2 = en_vocab[text2]
    lex2.prob = prob2

    assert lex1 < lex2
    assert lex2 > lex1


@pytest.mark.parametrize('text1,text2', [("phantom", "opera")])
def test_vocab_lexeme_hash(en_vocab, text1, text2):
    """Test that lexemes are hashable."""
    lex1 = en_vocab[text1]
    lex2 = en_vocab[text2]
    lexes = {lex1: lex1, lex2: lex2}
    assert lexes[lex1].orth_ == text1
    assert lexes[lex2].orth_ == text2


def test_vocab_lexeme_is_alpha(en_vocab):
    assert en_vocab['the'].flags & (1 << IS_ALPHA)
    assert not en_vocab['1999'].flags & (1 << IS_ALPHA)
    assert not en_vocab['hello1'].flags & (1 << IS_ALPHA)


def test_vocab_lexeme_is_digit(en_vocab):
    assert not en_vocab['the'].flags & (1 << IS_DIGIT)
    assert en_vocab['1999'].flags & (1 << IS_DIGIT)
    assert not en_vocab['hello1'].flags & (1 << IS_DIGIT)


def test_vocab_lexeme_add_flag_auto_id(en_vocab):
    is_len4 = en_vocab.add_flag(lambda string: len(string) == 4)
    assert en_vocab['1999'].check_flag(is_len4) == True
    assert en_vocab['1999'].check_flag(IS_DIGIT) == True
    assert en_vocab['199'].check_flag(is_len4) == False
    assert en_vocab['199'].check_flag(IS_DIGIT) == True
    assert en_vocab['the'].check_flag(is_len4) == False
    assert en_vocab['dogs'].check_flag(is_len4) == True


def test_vocab_lexeme_add_flag_provided_id(en_vocab):
    is_len4 = en_vocab.add_flag(lambda string: len(string) == 4, flag_id=IS_DIGIT)
    assert en_vocab['1999'].check_flag(is_len4) == True
    assert en_vocab['199'].check_flag(is_len4) == False
    assert en_vocab['199'].check_flag(IS_DIGIT) == False
    assert en_vocab['the'].check_flag(is_len4) == False
    assert en_vocab['dogs'].check_flag(is_len4) == True


def test_lexeme_bytes_roundtrip(en_vocab):
    one = en_vocab['one']
    alpha = en_vocab['alpha']
    assert one.orth != alpha.orth
    assert one.lower != alpha.lower
    alpha.from_bytes(one.to_bytes())

    assert one.orth_ == alpha.orth_
    assert one.orth == alpha.orth
    assert one.lower == alpha.lower
    assert one.lower_ == alpha.lower_

