import uuid
from datetime import datetime

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

from app.database import Base


def generate_uuid() -> str:
    return str(uuid.uuid4())


class ApiToken(Base):
    __tablename__ = "api_tokens"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=generate_uuid)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    token_hash: Mapped[str] = mapped_column(Text, nullable=False)  # SHA-256 hash of actual token
    role: Mapped[str] = mapped_column(String(20), nullable=False)  # researcher, developer, viewer
    agent_id: Mapped[str] = mapped_column(String(36), ForeignKey("agents.id", ondelete="CASCADE"), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, nullable=False)
    last_used_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)