import pytest
from spacy.language import Language
from spacy.lang.en import English
from spacy.lang.de import German
from spacy.tokens import Doc
from spacy.util import registry, SimpleFrozenDict, combine_score_weights
from thinc.api import Model, Linear
from thinc.config import ConfigValidationError
from pydantic import StrictInt, StrictStr


def test_pipe_function_component():
    name = "test_component"

    @Language.component(name)
    def component(doc: Doc) -> Doc:
        return doc

    assert name in registry.factories
    nlp = Language()
    with pytest.raises(ValueError):
        nlp.add_pipe(component)
    nlp.add_pipe(name)
    assert name in nlp.pipe_names
    assert nlp.pipe_factories[name] == name
    assert Language.get_factory_meta(name)
    assert nlp.get_pipe_meta(name)
    pipe = nlp.get_pipe(name)
    assert pipe == component
    pipe = nlp.create_pipe(name)
    assert pipe == component


def test_pipe_class_component_init():
    name1 = "test_class_component1"
    name2 = "test_class_component2"

    @Language.factory(name1)
    class Component1:
        def __init__(self, nlp: Language, name: str):
            self.nlp = nlp

        def __call__(self, doc: Doc) -> Doc:
            return doc

    class Component2:
        def __init__(self, nlp: Language, name: str):
            self.nlp = nlp

        def __call__(self, doc: Doc) -> Doc:
            return doc

    @Language.factory(name2)
    def factory(nlp: Language, name=name2):
        return Component2(nlp, name)

    nlp = Language()
    for name, Component in [(name1, Component1), (name2, Component2)]:
        assert name in registry.factories
        with pytest.raises(ValueError):
            nlp.add_pipe(Component(nlp, name))
        nlp.add_pipe(name)
        assert name in nlp.pipe_names
        assert nlp.pipe_factories[name] == name
        assert Language.get_factory_meta(name)
        assert nlp.get_pipe_meta(name)
        pipe = nlp.get_pipe(name)
        assert isinstance(pipe, Component)
        assert isinstance(pipe.nlp, Language)
        pipe = nlp.create_pipe(name)
        assert isinstance(pipe, Component)
        assert isinstance(pipe.nlp, Language)


def test_pipe_class_component_config():
    name = "test_class_component_config"

    @Language.factory(name)
    class Component:
        def __init__(
            self, nlp: Language, name: str, value1: StrictInt, value2: StrictStr
        ):
            self.nlp = nlp
            self.value1 = value1
            self.value2 = value2
            self.is_base = True

        def __call__(self, doc: Doc) -> Doc:
            return doc

    @English.factory(name)
    class ComponentEN:
        def __init__(
            self, nlp: Language, name: str, value1: StrictInt, value2: StrictStr
        ):
            self.nlp = nlp
            self.value1 = value1
            self.value2 = value2
            self.is_base = False

        def __call__(self, doc: Doc) -> Doc:
            return doc

    nlp = Language()
    with pytest.raises(ConfigValidationError):  # no config provided
        nlp.add_pipe(name)
    with pytest.raises(ConfigValidationError):  # invalid config
        nlp.add_pipe(name, config={"value1": "10", "value2": "hello"})
    nlp.add_pipe(name, config={"value1": 10, "value2": "hello"})
    pipe = nlp.get_pipe(name)
    assert isinstance(pipe.nlp, Language)
    assert pipe.value1 == 10
    assert pipe.value2 == "hello"
    assert pipe.is_base is True

    nlp_en = English()
    with pytest.raises(ConfigValidationError):  # invalid config
        nlp_en.add_pipe(name, config={"value1": "10", "value2": "hello"})
    nlp_en.add_pipe(name, config={"value1": 10, "value2": "hello"})
    pipe = nlp_en.get_pipe(name)
    assert isinstance(pipe.nlp, English)
    assert pipe.value1 == 10
    assert pipe.value2 == "hello"
    assert pipe.is_base is False


def test_pipe_class_component_defaults():
    name = "test_class_component_defaults"

    @Language.factory(name)
    class Component:
        def __init__(
            self,
            nlp: Language,
            name: str,
            value1: StrictInt = 10,
            value2: StrictStr = "hello",
        ):
            self.nlp = nlp
            self.value1 = value1
            self.value2 = value2

        def __call__(self, doc: Doc) -> Doc:
            return doc

    nlp = Language()
    nlp.add_pipe(name)
    pipe = nlp.get_pipe(name)
    assert isinstance(pipe.nlp, Language)
    assert pipe.value1 == 10
    assert pipe.value2 == "hello"


def test_pipe_class_component_model():
    name = "test_class_component_model"
    default_config = {
        "model": {
            "@architectures": "spacy.TextCat.v1",
            "exclusive_classes": False,
            "pretrained_vectors": None,
            "width": 64,
            "embed_size": 2000,
            "window_size": 1,
            "conv_depth": 2,
            "ngram_size": 1,
            "dropout": None,
        },
        "value1": 10,
    }

    @Language.factory(name, default_config=default_config)
    class Component:
        def __init__(self, nlp: Language, model: Model, name: str, value1: StrictInt):
            self.nlp = nlp
            self.model = model
            self.value1 = value1
            self.name = name

        def __call__(self, doc: Doc) -> Doc:
            return doc

    nlp = Language()
    nlp.add_pipe(name)
    pipe = nlp.get_pipe(name)
    assert isinstance(pipe.nlp, Language)
    assert pipe.value1 == 10
    assert isinstance(pipe.model, Model)


def test_pipe_class_component_model_custom():
    name = "test_class_component_model_custom"
    arch = f"{name}.arch"
    default_config = {"value1": 1, "model": {"@architectures": arch, "nO": 0, "nI": 0}}

    @Language.factory(name, default_config=default_config)
    class Component:
        def __init__(
            self, nlp: Language, model: Model, name: str, value1: StrictInt = 10
        ):
            self.nlp = nlp
            self.model = model
            self.value1 = value1
            self.name = name

        def __call__(self, doc: Doc) -> Doc:
            return doc

    @registry.architectures(arch)
    def make_custom_arch(nO: StrictInt, nI: StrictInt):
        return Linear(nO, nI)

    nlp = Language()
    config = {"value1": 20, "model": {"@architectures": arch, "nO": 1, "nI": 2}}
    nlp.add_pipe(name, config=config)
    pipe = nlp.get_pipe(name)
    assert isinstance(pipe.nlp, Language)
    assert pipe.value1 == 20
    assert isinstance(pipe.model, Model)
    assert pipe.model.name == "linear"

    nlp = Language()
    with pytest.raises(ConfigValidationError):
        config = {"value1": "20", "model": {"@architectures": arch, "nO": 1, "nI": 2}}
        nlp.add_pipe(name, config=config)
    with pytest.raises(ConfigValidationError):
        config = {"value1": 20, "model": {"@architectures": arch, "nO": 1.0, "nI": 2.0}}
        nlp.add_pipe(name, config=config)


def test_pipe_factories_wrong_formats():
    with pytest.raises(ValueError):
        # Decorator is not called
        @Language.component
        def component(foo: int, bar: str):
            ...

    with pytest.raises(ValueError):
        # Decorator is not called
        @Language.factory
        def factory1(foo: int, bar: str):
            ...

    with pytest.raises(ValueError):
        # Factory function is missing "nlp" and "name" arguments
        @Language.factory("test_pipe_factories_missing_args")
        def factory2(foo: int, bar: str):
            ...


def test_pipe_factory_meta_config_cleanup():
    """Test that component-specific meta and config entries are represented
    correctly and cleaned up when pipes are removed, replaced or renamed."""
    nlp = Language()
    nlp.add_pipe("ner", name="ner_component")
    nlp.add_pipe("textcat")
    assert nlp.get_factory_meta("ner")
    assert nlp.get_pipe_meta("ner_component")
    assert nlp.get_pipe_config("ner_component")
    assert nlp.get_factory_meta("textcat")
    assert nlp.get_pipe_meta("textcat")
    assert nlp.get_pipe_config("textcat")
    nlp.rename_pipe("textcat", "tc")
    assert nlp.get_pipe_meta("tc")
    assert nlp.get_pipe_config("tc")
    with pytest.raises(ValueError):
        nlp.remove_pipe("ner")
    nlp.remove_pipe("ner_component")
    assert "ner_component" not in nlp._pipe_meta
    assert "ner_component" not in nlp._pipe_configs
    with pytest.raises(ValueError):
        nlp.replace_pipe("textcat", "parser")
    nlp.replace_pipe("tc", "parser")
    assert nlp.get_factory_meta("parser")
    assert nlp.get_pipe_meta("tc").factory == "parser"


def test_pipe_factories_empty_dict_default():
    """Test that default config values can be empty dicts and that no config
    validation error is raised."""
    # TODO: fix this
    name = "test_pipe_factories_empty_dict_default"

    @Language.factory(name, default_config={"foo": {}})
    def factory(nlp: Language, name: str, foo: dict):
        ...

    nlp = Language()
    nlp.create_pipe(name)


def test_pipe_factories_language_specific():
    """Test that language sub-classes can have their own factories, with
    fallbacks to the base factories."""
    name1 = "specific_component1"
    name2 = "specific_component2"
    Language.component(name1, func=lambda: "base")
    English.component(name1, func=lambda: "en")
    German.component(name2, func=lambda: "de")

    assert Language.has_factory(name1)
    assert not Language.has_factory(name2)
    assert English.has_factory(name1)
    assert not English.has_factory(name2)
    assert German.has_factory(name1)
    assert German.has_factory(name2)

    nlp = Language()
    assert nlp.create_pipe(name1)() == "base"
    with pytest.raises(ValueError):
        nlp.create_pipe(name2)
    nlp_en = English()
    assert nlp_en.create_pipe(name1)() == "en"
    with pytest.raises(ValueError):
        nlp_en.create_pipe(name2)
    nlp_de = German()
    assert nlp_de.create_pipe(name1)() == "base"
    assert nlp_de.create_pipe(name2)() == "de"


def test_language_factories_invalid():
    """Test that assigning directly to Language.factories is now invalid and
    raises a custom error."""
    assert isinstance(Language.factories, SimpleFrozenDict)
    with pytest.raises(NotImplementedError):
        Language.factories["foo"] = "bar"
    nlp = Language()
    assert isinstance(nlp.factories, SimpleFrozenDict)
    assert len(nlp.factories)
    with pytest.raises(NotImplementedError):
        nlp.factories["foo"] = "bar"


@pytest.mark.parametrize(
    "weights,expected",
    [
        ([{"a": 1.0}, {"b": 1.0}, {"c": 1.0}], {"a": 0.33, "b": 0.33, "c": 0.33}),
        ([{"a": 1.0}, {"b": 50}, {"c": 123}], {"a": 0.33, "b": 0.33, "c": 0.33}),
        (
            [{"a": 0.7, "b": 0.3}, {"c": 1.0}, {"d": 0.5, "e": 0.5}],
            {"a": 0.23, "b": 0.1, "c": 0.33, "d": 0.17, "e": 0.17},
        ),
        (
            [{"a": 100, "b": 400}, {"c": 0.5, "d": 0.5}],
            {"a": 0.1, "b": 0.4, "c": 0.25, "d": 0.25},
        ),
    ],
)
def test_language_factories_combine_score_weights(weights, expected):
    result = combine_score_weights(weights)
    assert sum(result.values()) in (0.99, 1.0)
    assert result == expected


def test_language_factories_scores():
    name = "test_language_factories_scores"
    func = lambda doc: doc
    scores1 = ["a1", "a2"]
    weights1 = {"a1": 0.5, "a2": 0.5}
    scores2 = ["b1", "b2", "b3"]
    weights2 = {"b1": 0.2, "b2": 0.7, "b3": 0.1}
    Language.component(
        f"{name}1", scores=scores1, score_weights=weights1, func=func,
    )
    Language.component(
        f"{name}2", scores=scores2, score_weights=weights2, func=func,
    )
    meta1 = Language.get_factory_meta(f"{name}1")
    assert meta1.scores == scores1
    assert meta1.score_weights == weights1
    meta2 = Language.get_factory_meta(f"{name}2")
    assert meta2.scores == scores2
    assert meta2.score_weights == weights2
    nlp = Language()
    nlp._config["training"]["scores"] = ["speed"]
    nlp._config["training"]["score_weights"] = {}
    nlp.add_pipe(f"{name}1")
    nlp.add_pipe(f"{name}2")
    cfg = nlp.config["training"]
    assert cfg["scores"] == ["speed", *scores1, *scores2]
    expected_weights = {"a1": 0.25, "a2": 0.25, "b1": 0.1, "b2": 0.35, "b3": 0.05}
    assert cfg["score_weights"] == expected_weights