"""业务接入边界：独立于核算月份和内部平账组。"""

from datetime import date
from uuid import UUID

from pydantic import BaseModel, ConfigDict, Field, field_validator


class SyncRange(BaseModel):
    model_config = ConfigDict(extra="forbid")
    start_date: date = date(2026, 3, 1)

    @field_validator("start_date")
    @classmethod
    def check_start(cls, value):
        if value < date(2026, 3, 1):
            raise ValueError("本次接入从2026年3月起，更早欠款通过期初承接")
        return value


class BusinessSyncUpdate(SyncRange):
    enabled: bool
    expected_version: int = Field(ge=0)


class BusinessSyncRun(SyncRange):
    request_key: UUID