import uuid
from datetime import datetime, timezone

from sqlalchemy import Column, String, Boolean, DateTime, Text, Integer, ForeignKey
from sqlalchemy.orm import relationship

from mqtt_home.database import Base


def _utcnow():
    return datetime.now(timezone.utc)


def _new_id():
    return str(uuid.uuid4())


class Device(Base):
    __tablename__ = "devices"

    id = Column(String(36), primary_key=True, default=_new_id)
    name = Column(String(200), nullable=False)
    type = Column(String(50), nullable=False, default="switch")
    protocol = Column(String(20), nullable=False, default="custom")
    mqtt_topic = Column(String(500), nullable=False)
    command_topic = Column(String(500), nullable=True)
    discovery_topic = Column(String(500), nullable=True)
    discovery_payload = Column(Text, nullable=True)
    attributes = Column(Text, nullable=True, default="{}")
    state = Column(String(500), nullable=True, default=None)
    is_online = Column(Boolean, nullable=False, default=False)
    last_seen = Column(DateTime(timezone=True), nullable=True)
    created_at = Column(DateTime(timezone=True), nullable=False, default=_utcnow)
    updated_at = Column(DateTime(timezone=True), nullable=False, default=_utcnow, onupdate=_utcnow)

    logs = relationship("DeviceLog", back_populates="device", lazy="select")


class DeviceLog(Base):
    __tablename__ = "device_logs"

    id = Column(Integer, primary_key=True, autoincrement=True)
    device_id = Column(String(36), ForeignKey("devices.id", ondelete="CASCADE"), nullable=False)
    direction = Column(String(10), nullable=False)
    topic = Column(String(500), nullable=False)
    payload = Column(Text, nullable=False)
    timestamp = Column(DateTime(timezone=True), nullable=False, default=_utcnow)

    device = relationship("Device", back_populates="logs")