from datetime import datetime
from typing import TYPE_CHECKING

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

from app.core.database.models.base import Base

if TYPE_CHECKING:
    from app.core.database.models.exercise import ExerciseModel


class ApproachModel(Base):
    __tablename__ = "approaches"

    id: Mapped[int] = mapped_column(primary_key=True)
    exercise_id: Mapped[int] = mapped_column(
        ForeignKey("exercises.id", ondelete="CASCADE"), index=True
    )
    weight: Mapped[float] = mapped_column(Float)
    reps: Mapped[int]
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now()
    )

    exercise: Mapped["ExerciseModel"] = relationship(back_populates="approaches")