from datetime import datetime
from typing import Any

from sqlalchemy import Boolean, Column, DateTime, Float, Integer, String

from app import db
from .base import default_uuid


class ComponentStock(db.Model):
    """Остатки компонентов на сервере (не синхронизируется).

    Без TimestampMixin: в БД (Alembic 0001) нет колонки created_at, только updated_at/stocktake_at.
    """

    __tablename__ = "component_stock"

    id = Column(String(36), primary_key=True, default=default_uuid)
    component_id = Column(String(36), nullable=False, unique=True, index=True)
    component_name = Column(String(100), nullable=False, default="")
    total_kg = Column(Float, nullable=False, default=0.0)
    inflow_kg = Column(Float, nullable=False, default=0.0)
    baseline_consumed_kg = Column(Float, nullable=False, default=0.0)
    stocktake_at = Column(DateTime, nullable=False)
    updated_at = Column(DateTime, nullable=False)
    updated_by = Column(String(50), nullable=False, default="system")
    sort_order = Column(Integer, nullable=False, default=0)
    is_deleted = Column(Boolean, default=False, nullable=True)
    deleted_at = Column(DateTime, nullable=True)
    deleted_by = Column(String(50), nullable=True)

    def soft_delete(self, deleted_by_user: str = "system", **_: Any) -> None:
        """Мягкое удаление строки склада (ожидается из sklad.init_sklad)."""
        if self.is_deleted:
            return
        self.is_deleted = True
        self.deleted_at = datetime.now()
        self.deleted_by = deleted_by_user