#  Copyright 2021-present, the Recognai S.L. team.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

from datetime import datetime
from typing import Generic, List, Literal, Optional, TypeVar, Union
from uuid import UUID

from argilla.server.enums import MetadataPropertyType
from argilla.server.pydantic_v1 import BaseModel, Field, validator
from argilla.server.pydantic_v1.generics import GenericModel
from argilla.server.schemas.base import UpdateSchema
from argilla.server.schemas.v1.datasets import MetadataPropertySettings, MetadataPropertyTitle

FLOAT_METADATA_METRICS_PRECISION = 5

try:
    from typing import Annotated
except ImportError:
    from typing_extensions import Annotated


class TermsMetadataMetrics(BaseModel):
    class TermCount(BaseModel):
        term: str
        count: int

    type: Literal[MetadataPropertyType.terms] = Field(MetadataPropertyType.terms, const=True)
    total: int
    values: List[TermCount] = Field(default_factory=list)


NT = TypeVar("NT", int, float)


class NumericMetadataMetrics(GenericModel, Generic[NT]):
    min: Optional[NT]
    max: Optional[NT]


class IntegerMetadataMetrics(NumericMetadataMetrics[int]):
    type: Literal[MetadataPropertyType.integer] = Field(MetadataPropertyType.integer, const=True)


class FloatMetadataMetrics(NumericMetadataMetrics[float]):
    type: Literal[MetadataPropertyType.float] = Field(MetadataPropertyType.float, const=True)

    @validator("min", "max")
    def round_result(cls, v: float):
        if v is not None:
            return round(v, FLOAT_METADATA_METRICS_PRECISION)
        return v


MetadataMetrics = Annotated[
    Union[TermsMetadataMetrics, IntegerMetadataMetrics, FloatMetadataMetrics], Field(..., discriminator="type")
]


class MetadataProperty(BaseModel):
    id: UUID
    name: str
    title: str
    settings: MetadataPropertySettings
    visible_for_annotators: bool
    dataset_id: UUID
    inserted_at: datetime
    updated_at: datetime

    class Config:
        orm_mode = True


class MetadataPropertyUpdate(UpdateSchema):
    title: Optional[MetadataPropertyTitle]
    visible_for_annotators: Optional[bool]

    __non_nullable_fields__ = {"title", "visible_for_annotators"}
