"""ProgressLog model for tracking progression suggestions and outcomes.

Records what the progression engine suggested vs what the user actually did.
"""

import datetime as dt
from typing import Optional

from sqlmodel import Field, SQLModel


class ProgressLog(SQLModel, table=True):
    """A progression tracking entry for a specific exercise.

    Attributes:
        id: Primary key, auto-incremented.
        user_id: FK to users table.
        exercise_id: FK to exercises table.
        date: The date this progression entry applies to.
        suggested_reps: What the engine recommended.
        suggested_weight: What the engine recommended.
        actual_reps: What the user actually did.
        actual_weight: What the user actually used.
        progression_applied: Type of progression (e.g., "reps_increase", "weight_increase", "deload").
        created_at: Timestamp when the record was created.
    """

    __tablename__ = "progress_log"

    id: Optional[int] = Field(default=None, primary_key=True)
    user_id: int = Field(foreign_key="users.id", index=True)
    exercise_id: int = Field(foreign_key="exercises.id")
    date: dt.date = Field(default_factory=dt.date.today)
    suggested_reps: Optional[int] = Field(default=None)
    suggested_weight: Optional[str] = Field(default=None)
    actual_reps: Optional[int] = Field(default=None)
    actual_weight: Optional[str] = Field(default=None)
    progression_applied: Optional[str] = Field(default=None)
    created_at: dt.datetime = Field(default_factory=dt.datetime.utcnow)