# coding: utf-8
from __future__ import unicode_literals

import pytest
from spacy import displacy
from spacy.tokens import Span

from .util import get_doc


def test_displacy_parse_ents(en_vocab):
    """Test that named entities on a Doc are converted into displaCy's format."""
    doc = get_doc(en_vocab, words=["But", "Google", "is", "starting", "from", "behind"])
    doc.ents = [Span(doc, 1, 2, label=doc.vocab.strings["ORG"])]
    ents = displacy.parse_ents(doc)
    assert isinstance(ents, dict)
    assert ents["text"] == "But Google is starting from behind "
    assert ents["ents"] == [{"start": 4, "end": 10, "label": "ORG"}]


def test_displacy_parse_deps(en_vocab):
    """Test that deps and tags on a Doc are converted into displaCy's format."""
    words = ["This", "is", "a", "sentence"]
    heads = [1, 0, 1, -2]
    pos = ["DET", "VERB", "DET", "NOUN"]
    tags = ["DT", "VBZ", "DT", "NN"]
    deps = ["nsubj", "ROOT", "det", "attr"]
    doc = get_doc(en_vocab, words=words, heads=heads, pos=pos, tags=tags, deps=deps)
    deps = displacy.parse_deps(doc)
    assert isinstance(deps, dict)
    assert deps["words"] == [
        {"text": "This", "tag": "DET"},
        {"text": "is", "tag": "VERB"},
        {"text": "a", "tag": "DET"},
        {"text": "sentence", "tag": "NOUN"},
    ]
    assert deps["arcs"] == [
        {"start": 0, "end": 1, "label": "nsubj", "dir": "left"},
        {"start": 2, "end": 3, "label": "det", "dir": "left"},
        {"start": 1, "end": 3, "label": "attr", "dir": "right"},
    ]


def test_displacy_spans(en_vocab):
    """Test that displaCy can render Spans."""
    doc = get_doc(en_vocab, words=["But", "Google", "is", "starting", "from", "behind"])
    doc.ents = [Span(doc, 1, 2, label=doc.vocab.strings["ORG"])]
    html = displacy.render(doc[1:4], style="ent")
    assert html.startswith("<div")


def test_displacy_render_wrapper(en_vocab):
    """Test that displaCy accepts custom rendering wrapper."""

    def wrapper(html):
        return "TEST" + html + "TEST"

    displacy.set_render_wrapper(wrapper)
    doc = get_doc(en_vocab, words=["But", "Google", "is", "starting", "from", "behind"])
    doc.ents = [Span(doc, 1, 2, label=doc.vocab.strings["ORG"])]
    html = displacy.render(doc, style="ent")
    assert html.startswith("TEST<div")
    assert html.endswith("/div>TEST")


def test_displacy_raises_for_wrong_type(en_vocab):
    with pytest.raises(ValueError):
        displacy.render("hello world")