"""投资协议模型。

协议条款提取与持续监控。
"""

import uuid
from datetime import datetime, timezone

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

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


class InvestmentAgreement(Base):
    """投资协议。"""

    __tablename__ = "investment_agreements"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    company_id: Mapped[str] = mapped_column(String(36), ForeignKey("companies.id"), nullable=False, index=True)
    title: Mapped[str] = mapped_column(String(200), nullable=False, comment="协议名称")
    signed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, comment="签署日期")
    file_url: Mapped[str | None] = mapped_column(String(500), nullable=True, comment="文件 URL")
    key_clauses: Mapped[dict | None] = mapped_column(JSONBType, nullable=True, comment="关键条款 JSON")
    monitoring_rules: Mapped[dict | None] = mapped_column(JSONBType, nullable=True, comment="监控规则")
    status: Mapped[str] = mapped_column(String(20), nullable=False, default="active", comment="active/expired/terminated")
    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),
    )