"""Terminal session database model."""

import uuid
from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, String
from sqlalchemy import Uuid as UUID
from sqlalchemy.orm import Mapped, mapped_column

from src.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin


class TerminalSessionModel(UUIDPrimaryKeyMixin, TimestampMixin, Base):
    """Database model for terminal session metadata."""

    __tablename__ = "terminal_sessions"

    instance_id: Mapped[uuid.UUID] = mapped_column(
        UUID(),
        ForeignKey("tool_instances.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    name: Mapped[str | None] = mapped_column(String(255), nullable=True)
    status: Mapped[str] = mapped_column(
        String(50),
        nullable=False,
        default="active",
    )
    last_activity_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True),
        nullable=True,
    )
    closed_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True),
        nullable=True,
    )