"""WorkoutLog model for per-exercise set logging.

Each log entry records one set of one exercise within a session.
"""

from datetime import datetime
from typing import Optional

from sqlmodel import Field, SQLModel


class WorkoutLog(SQLModel, table=True):
    """A single set log for an exercise within a workout session.

    Attributes:
        id: Primary key, auto-incremented.
        session_id: FK to workout_sessions table.
        exercise_id: FK to exercises table.
        set_number: Which set this is (1, 2, 3...).
        reps_completed: Actual reps performed.
        weight_used: Weight used as string (e.g., "30 lbs", "BW").
        felt_easy: Whether the user felt the set was easy (progression signal).
        notes: Optional notes about this specific set.
        created_at: Timestamp when the record was created.
    """

    __tablename__ = "workout_logs"

    id: Optional[int] = Field(default=None, primary_key=True)
    session_id: int = Field(foreign_key="workout_sessions.id", index=True)
    exercise_id: int = Field(foreign_key="exercises.id")
    set_number: int = Field(default=1)
    reps_completed: int = Field(default=0)
    weight_used: str = Field(default="")
    felt_easy: bool = Field(default=False)
    notes: Optional[str] = Field(default=None)
    created_at: datetime = Field(default_factory=datetime.utcnow)