from datetime import date
from typing import Literal

from pydantic import BaseModel, ConfigDict, Field


class Classification(BaseModel):
    """LLM-extracted variables for a single legal case.

    Strict typing: numbers are numbers, dates are dates. The LLM must
    return native JSON types — no string-wrapped numerics.
    """

    model_config = ConfigDict(strict=True, populate_by_name=True)

    legal_subject_judgement: str | None = Field(
        default=None, description="Legal subject of the case (English, formatted)."
    )
    trial_start_date: date | None = Field(
        default=None, description="Trial start date (YYYY-MM-DD)."
    )
    trial_end_date: date | None = Field(
        default=None, description="Trial end (decision) date (YYYY-MM-DD)."
    )
    dispute_value_nominal: float | Literal["nonpecuniary"] | None = Field(
        default=None,
        description="Amount in dispute as a number, or the literal string 'nonpecuniary'.",
    )
    currency_dispute_value_nominal: str | None = Field(
        default=None,
        alias="Currency_dispute_value_nominal",
        description="ISO-4217 currency code for the dispute value (e.g. CHF).",
    )
    plaintiff_loosing_share: float | None = Field(
        default=None, description="Plaintiff's losing share between 0.0 and 1.0."
    )
    court_cost_awarded_nominal: float | None = Field(
        default=None, description="Total court fees as a number."
    )
    currency_court_cost_awarded_nominal: str | None = Field(
        default=None,
        alias="Currency_court_cost_awarded_nominal",
        description="ISO-4217 currency code for the court fees.",
    )
    party_compensation_awarded_nominal: float | None = Field(
        default=None, description="Total party compensation as a number."
    )
    currency_party_compensation_awarded_nominal: str | None = Field(
        default=None,
        alias="Currency_party_compensation_awarded_nominal",
        description="ISO-4217 currency code for party compensation.",
    )
    plaintiffs_all_count: int | None = Field(
        default=None, description="Number of plaintiffs."
    )
    defendants_all_count: int | None = Field(
        default=None, description="Number of defendants."
    )
    plaintiff_no1_ISIC1_industry_category: str | None = Field(
        default=None, description="ISIC sector for the first plaintiff."
    )
    defendant_no1_ISIC1_industry_category: str | None = Field(
        default=None, description="ISIC sector for the first defendant."
    )