import numpy as np
import pytest
from linkml_runtime.linkml_model import (
    ClassDefinition,
    SchemaDefinition,
    SlotDefinition,
    TypeDefinition,
)

from nwb_linkml.adapters import BuildResult
from nwb_schema_language import Attribute, Dataset, Group, Schema


def test_walk(nwb_core_fixture):
    """
    Not sure exactly what should be tested here, for now just testing that we get an expected value
    """
    everything = nwb_core_fixture.walk(nwb_core_fixture)

    # number of items obviously changes based on what version we're talking about
    # this is configured as a test matrix on the nwb_core_fixture, currently only testing the latest version
    if (
        nwb_core_fixture.versions["core"] == "2.6.0-alpha"
        and nwb_core_fixture.versions["hdmf-common"] == "1.5.0"
    ):

        assert len(list(everything)) == 9908


@pytest.mark.parametrize(
    ["walk_class", "known_number"],
    [(Dataset, 212), (Group, 146), ((Dataset, Group), 358), (Schema, 19)],
)
def test_walk_types(nwb_core_fixture, walk_class, known_number):
    classes = nwb_core_fixture.walk_types(nwb_core_fixture, walk_class)
    class_list = list(classes)
    assert len(class_list) == known_number


def test_walk_fields(nwb_core_fixture):
    # should get same number of dtype fields as there are datasets and attributes + compound dtypes
    dtype = list(nwb_core_fixture.walk_fields(nwb_core_fixture, "dtype"))

    dtype_havers = list(nwb_core_fixture.walk_types(nwb_core_fixture, (Dataset, Attribute)))
    dtype_havers = [haver for haver in dtype_havers if haver.dtype is not None]
    compound_dtypes = [len(d.dtype) for d in dtype_havers if isinstance(d.dtype, list)]
    expected_dtypes = np.sum(compound_dtypes) + len(dtype_havers)
    assert expected_dtypes == len(dtype)


def test_walk_field_values(nwb_core_fixture):
    dtype_models = list(nwb_core_fixture.walk_field_values(nwb_core_fixture, "dtype", value=None))
    assert all([hasattr(d, "dtype") for d in dtype_models])
    text_models = list(nwb_core_fixture.walk_field_values(nwb_core_fixture, "dtype", value="text"))
    assert all([d.dtype == "text" for d in text_models])
    # 135 known value from regex search
    assert len(text_models) == len([d for d in dtype_models if d.dtype == "text"]) == 155


def test_build_result(linkml_schema_bare):
    """
    build results can hold lists of class, slot, and type definitions
    """
    schema = linkml_schema_bare
    sch = schema.core
    cls = sch.classes["MainTopLevel"]
    slot1 = cls.attributes["name"]
    typ = sch.types["numeric"]

    # Build result should hold the results and coerce to list type
    res = BuildResult(schemas=sch, classes=cls, slots=slot1, types=typ)
    for field in ("schemas", "classes", "slots", "types"):
        assert isinstance(getattr(res, field), list)
        assert len(getattr(res, field)) == 1


@pytest.mark.parametrize("sch_type", ("schemas", "classes", "slots", "types"))
def test_build_result_add(linkml_schema_bare, sch_type):
    """
    Build results can be added together without duplicating
    """
    schema = linkml_schema_bare
    if sch_type == "schemas":
        obj = schema.core
        other_obj = SchemaDefinition(name="othername", id="othername", version="1.0.1")
    elif sch_type == "classes":
        obj = schema.core.classes["MainTopLevel"]
        other_obj = ClassDefinition(name="othername")
    elif sch_type == "slots":
        obj = schema.core.classes["MainTopLevel"].attributes["name"]
        other_obj = SlotDefinition(name="othername", range="string")
    elif sch_type == "types":
        obj = schema.core.types["numeric"]
        other_obj = TypeDefinition(name="othername", typeof="float")
    else:
        raise ValueError(f"Dont know how to test type {sch_type}")

    res1 = BuildResult(**{sch_type: [obj]})
    res2 = BuildResult(**{sch_type: [obj]})
    assert len(getattr(res1, sch_type)) == 1
    assert len(getattr(res2, sch_type)) == 1

    assert len(getattr(res1 + res2, sch_type)) == 1
    assert len(getattr(res2 + res1, sch_type)) == 1

    # and then addition works as normal for not same named items
    res3 = BuildResult(**{sch_type: [other_obj]})
    assert len(getattr(res1 + res3, sch_type)) == 2
    assert len(getattr(res2 + res3, sch_type)) == 2

    res_combined_2 = res1 + res3
    assert getattr(res_combined_2, sch_type)[-1] is other_obj