from __future__ import annotations

from datetime import datetime

from sqlalchemy import Boolean, DateTime, Float, ForeignKey, Index, Integer, String, func
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db import Base


class Device(Base):
    __tablename__ = "devices"

    id: Mapped[str] = mapped_column(String(64), primary_key=True)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    device_type: Mapped[str] = mapped_column(String(64), nullable=False)
    enable_cloud_service: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
    hub_device_id: Mapped[str | None] = mapped_column(String(64))
    last_seen_at: Mapped[datetime | None] = mapped_column(DateTime)
    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now(), nullable=False)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime,
        server_default=func.now(),
        onupdate=func.now(),
        nullable=False,
    )

    readings: Mapped[list["Reading"]] = relationship(back_populates="device")


class Reading(Base):
    __tablename__ = "readings"
    __table_args__ = (
        Index("ix_readings_device_recorded", "device_id", "recorded_at"),
        Index("ix_readings_recorded", "recorded_at"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    device_id: Mapped[str] = mapped_column(ForeignKey("devices.id"), nullable=False)
    recorded_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    temperature: Mapped[float | None] = mapped_column(Float)
    humidity: Mapped[float | None] = mapped_column(Float)
    battery: Mapped[int | None] = mapped_column(Integer)
    version: Mapped[str | None] = mapped_column(String(32))

    device: Mapped[Device] = relationship(back_populates="readings")