"""WorkoutSession model for tracking completed workout sessions.

Each session ties a user to a workout day on a specific date.
"""

import datetime as dt
from typing import Optional

from sqlmodel import Field, SQLModel


class WorkoutSession(SQLModel, table=True):
    """A completed workout session.

    Attributes:
        id: Primary key, auto-incremented.
        user_id: FK to users table.
        workout_day_id: FK to workout_days table.
        date: The date the workout was performed.
        notes: Optional free-text notes about the session.
        created_at: Timestamp when the record was created.
    """

    __tablename__ = "workout_sessions"

    id: Optional[int] = Field(default=None, primary_key=True)
    user_id: int = Field(foreign_key="users.id", index=True)
    workout_day_id: int = Field(foreign_key="workout_days.id")
    date: dt.date = Field(default_factory=dt.date.today)
    notes: Optional[str] = Field(default=None)
    created_at: dt.datetime = Field(default_factory=dt.datetime.utcnow)