"""任务操作日志模型"""
import uuid
from datetime import datetime, timezone
from sqlalchemy import String, DateTime, ForeignKey, Text
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.models.base import Base


class TaskLog(Base):
    __tablename__ = "task_logs"

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4,
    )

    # ---- 物理外键（关联本库 tasks） ----
    task_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("tasks.id"), nullable=False, index=True, comment="所属任务ID",
    )

    # ---- 逻辑外键（关联老系统用户表，仅存储 ID，无物理约束） ----
    operator_id: Mapped[str | None] = mapped_column(
        String(64), nullable=True, comment="操作人ID(逻辑外键→老系统)",
    )

    action_type: Mapped[str] = mapped_column(
        String(50), nullable=False, comment="操作类型",
    )

    remark: Mapped[str | None] = mapped_column(
        Text, nullable=True, comment="备注",
    )

    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), comment="创建时间",
    )

    # ---- 关系 ----
    task: Mapped["Task"] = relationship("Task", lazy="selectin")

    def __repr__(self) -> str:
        return f"<TaskLog {self.action_type} @ {self.created_at}>"