# coding: utf-8
from __future__ import unicode_literals

from ..util import make_tempdir
from ...util import ensure_path

from spacy.kb import KnowledgeBase


def test_serialize_kb_disk(en_vocab):
    # baseline assertions
    kb1 = _get_dummy_kb(en_vocab)
    _check_kb(kb1)

    # dumping to file & loading back in
    with make_tempdir() as d:
        dir_path = ensure_path(d)
        if not dir_path.exists():
            dir_path.mkdir()
        file_path = dir_path / "kb"
        kb1.dump(str(file_path))

        kb2 = KnowledgeBase(vocab=en_vocab, entity_vector_length=3)
        kb2.load_bulk(str(file_path))

    # final assertions
    _check_kb(kb2)


def _get_dummy_kb(vocab):
    kb = KnowledgeBase(vocab=vocab, entity_vector_length=3)

    kb.add_entity(entity='Q53', freq=33, entity_vector=[0, 5, 3])
    kb.add_entity(entity='Q17', freq=2, entity_vector=[7, 1, 0])
    kb.add_entity(entity='Q007', freq=7, entity_vector=[0, 0, 7])
    kb.add_entity(entity='Q44', freq=342, entity_vector=[4, 4, 4])

    kb.add_alias(alias='double07', entities=['Q17', 'Q007'], probabilities=[0.1, 0.9])
    kb.add_alias(alias='guy', entities=['Q53', 'Q007', 'Q17', 'Q44'], probabilities=[0.3, 0.3, 0.2, 0.1])
    kb.add_alias(alias='random', entities=['Q007'], probabilities=[1.0])

    return kb


def _check_kb(kb):
    # check entities
    assert kb.get_size_entities() == 4
    for entity_string in ['Q53', 'Q17', 'Q007', 'Q44']:
        assert entity_string in kb.get_entity_strings()
    for entity_string in ['', 'Q0']:
        assert entity_string not in kb.get_entity_strings()

    # check aliases
    assert kb.get_size_aliases() == 3
    for alias_string in ['double07', 'guy', 'random']:
        assert alias_string in kb.get_alias_strings()
    for alias_string in ['nothingness', '', 'randomnoise']:
        assert alias_string not in kb.get_alias_strings()

    # check candidates & probabilities
    candidates = sorted(kb.get_candidates('double07'), key=lambda x: x.entity_)
    assert len(candidates) == 2

    assert candidates[0].entity_ == 'Q007'
    assert 6.999 < candidates[0].entity_freq < 7.01
    assert candidates[0].entity_vector == [0, 0, 7]
    assert candidates[0].alias_ == 'double07'
    assert 0.899 < candidates[0].prior_prob < 0.901

    assert candidates[1].entity_ == 'Q17'
    assert 1.99 < candidates[1].entity_freq < 2.01
    assert candidates[1].entity_vector == [7, 1, 0]
    assert candidates[1].alias_ == 'double07'
    assert 0.099 < candidates[1].prior_prob < 0.101