from datetime import datetime
from sqlalchemy import DateTime, Float, ForeignKey, Index
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


class Position(Base):
    __tablename__ = "positions"

    id: Mapped[int] = mapped_column(primary_key=True)
    vehicle_id: Mapped[int] = mapped_column(ForeignKey("vehicles.id", ondelete="CASCADE"))
    timestamp: Mapped[datetime] = mapped_column(DateTime, nullable=False, default=datetime.utcnow)
    lat: Mapped[float] = mapped_column(Float, nullable=False)
    lon: Mapped[float] = mapped_column(Float, nullable=False)
    speed: Mapped[float] = mapped_column(Float, default=0.0)  # km/h
    heading: Mapped[float] = mapped_column(Float, default=0.0)  # 0-360 degrees

    # Relationships
    vehicle: Mapped["Vehicle"] = relationship(back_populates="positions")

    __table_args__ = (
        Index("idx_positions_vehicle_ts", "vehicle_id", "timestamp"),
    )