import pytest

from haystack import ComponentError, DeserializationError
from haystack.components.extractors import NamedEntityExtractor, NamedEntityExtractorBackend
from haystack.utils.device import ComponentDevice


@pytest.mark.unit
def test_named_entity_extractor_backend():
    _ = NamedEntityExtractor(backend=NamedEntityExtractorBackend.HUGGING_FACE, model="dslim/bert-base-NER")

    _ = NamedEntityExtractor(backend="hugging_face", model="dslim/bert-base-NER")

    _ = NamedEntityExtractor(backend=NamedEntityExtractorBackend.SPACY, model="en_core_web_sm")

    _ = NamedEntityExtractor(backend="spacy", model="en_core_web_sm")

    with pytest.raises(ComponentError, match=r"Invalid backend"):
        NamedEntityExtractor(backend="random_backend", model="dslim/bert-base-NER")


@pytest.mark.unit
def test_named_entity_extractor_serde():
    extractor = NamedEntityExtractor(
        backend=NamedEntityExtractorBackend.HUGGING_FACE,
        model="dslim/bert-base-NER",
        device=ComponentDevice.from_str("cuda:1"),
    )

    serde_data = extractor.to_dict()
    new_extractor = NamedEntityExtractor.from_dict(serde_data)

    assert type(new_extractor._backend) == type(extractor._backend)
    assert new_extractor._backend.model_name == extractor._backend.model_name
    assert new_extractor._backend.device == extractor._backend.device

    with pytest.raises(DeserializationError, match=r"Couldn't deserialize"):
        serde_data["init_parameters"].pop("backend")
        _ = NamedEntityExtractor.from_dict(serde_data)