from datetime import datetime, timezone

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

from .db import Base


def utcnow() -> datetime:
    return datetime.now(timezone.utc)


class Peer(Base):
    __tablename__ = "peers"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    name: Mapped[str] = mapped_column(String(64), unique=True)
    public_key: Mapped[str] = mapped_column(String(64), unique=True)
    private_key_enc: Mapped[str] = mapped_column(String(256))
    preshared_key_enc: Mapped[str] = mapped_column(String(256))
    address: Mapped[str] = mapped_column(String(64), unique=True)
    enabled: Mapped[bool] = mapped_column(Boolean, default=True)
    expires_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utcnow)


class TrafficSample(Base):
    __tablename__ = "traffic_samples"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    peer_public_key: Mapped[str] = mapped_column(String(64), index=True)
    rx_bytes: Mapped[int] = mapped_column(Integer, default=0)
    tx_bytes: Mapped[int] = mapped_column(Integer, default=0)
    sampled_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utcnow, index=True)