# coding: utf-8
from __future__ import unicode_literals

import pytest
from mock import Mock
from spacy.tokens import Doc, Span, Token
from spacy.tokens.underscore import Underscore


def test_create_doc_underscore():
    doc = Mock()
    doc.doc = doc
    uscore = Underscore(Underscore.doc_extensions, doc)
    assert uscore._doc is doc
    assert uscore._start is None
    assert uscore._end is None


def test_doc_underscore_getattr_setattr():
    doc = Mock()
    doc.doc = doc
    doc.user_data = {}
    Underscore.doc_extensions["hello"] = (False, None, None, None)
    doc._ = Underscore(Underscore.doc_extensions, doc)
    assert doc._.hello == False
    doc._.hello = True
    assert doc._.hello == True


def test_create_span_underscore():
    span = Mock(doc=Mock(), start=0, end=2)
    uscore = Underscore(
        Underscore.span_extensions, span, start=span.start, end=span.end
    )
    assert uscore._doc is span.doc
    assert uscore._start is span.start
    assert uscore._end is span.end


def test_span_underscore_getter_setter():
    span = Mock(doc=Mock(), start=0, end=2)
    Underscore.span_extensions["hello"] = (
        None,
        None,
        lambda s: (s.start, "hi"),
        lambda s, value: setattr(s, "start", value),
    )
    span._ = Underscore(
        Underscore.span_extensions, span, start=span.start, end=span.end
    )

    assert span._.hello == (0, "hi")
    span._.hello = 1
    assert span._.hello == (1, "hi")


def test_token_underscore_method():
    token = Mock(doc=Mock(), idx=7, say_cheese=lambda token: "cheese")
    Underscore.token_extensions["hello"] = (None, token.say_cheese, None, None)
    token._ = Underscore(Underscore.token_extensions, token, start=token.idx)
    assert token._.hello() == "cheese"


@pytest.mark.parametrize("obj", [Doc, Span, Token])
def test_doc_underscore_remove_extension(obj):
    ext_name = "to_be_removed"
    obj.set_extension(ext_name, default=False)
    assert obj.has_extension(ext_name)
    obj.remove_extension(ext_name)
    assert not obj.has_extension(ext_name)


@pytest.mark.parametrize("obj", [Doc, Span, Token])
def test_underscore_raises_for_dup(obj):
    obj.set_extension("test", default=None)
    with pytest.raises(ValueError):
        obj.set_extension("test", default=None)


@pytest.mark.parametrize(
    "invalid_kwargs",
    [
        {"getter": None, "setter": lambda: None},
        {"default": None, "method": lambda: None, "getter": lambda: None},
        {"setter": lambda: None},
        {"default": None, "method": lambda: None},
        {"getter": True},
    ],
)
def test_underscore_raises_for_invalid(invalid_kwargs):
    invalid_kwargs["force"] = True
    with pytest.raises(ValueError):
        Doc.set_extension("test", **invalid_kwargs)


@pytest.mark.parametrize(
    "valid_kwargs",
    [
        {"getter": lambda: None},
        {"getter": lambda: None, "setter": lambda: None},
        {"default": "hello"},
        {"default": None},
        {"method": lambda: None},
    ],
)
def test_underscore_accepts_valid(valid_kwargs):
    valid_kwargs["force"] = True
    Doc.set_extension("test", **valid_kwargs)