"""租户模型。

投资机构和被投企业都属于某个租户。多租户隔离的基础。
"""

import uuid
from datetime import datetime, timezone

from sqlalchemy import DateTime, String
from sqlalchemy.orm import Mapped, mapped_column

from app.core.database import Base
from app.core.types import JSONBType


class Tenant(Base):
    """租户（投资机构）。"""

    __tablename__ = "tenants"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    name: Mapped[str] = mapped_column(String(200), nullable=False, comment="租户名称")
    type: Mapped[str] = mapped_column(String(50), nullable=False, default="vc", comment="租户类型：vc/cvc/gov/holdings")
    config_json: Mapped[dict | None] = mapped_column(JSONBType, nullable=True, comment="租户配置")
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        default=lambda: datetime.now(timezone.utc),
        onupdate=lambda: datetime.now(timezone.utc),
    )