"""Coach comments on a specific objective."""

from app.extensions import db
from app.time_utils import utc_now_naive


class ObjectiveComment(db.Model):
    """A coach's comment on a player-evolution objective.

    This is a separate table from PersonalNote — no existing schema
    is altered.  The objective-form page also *reads* PersonalNote and
    TeamNote for context, but never writes to those tables.
    """

    __tablename__ = 'objective_comments'

    id = db.Column(db.Integer, primary_key=True)
    objective_id = db.Column(
        db.Integer,
        db.ForeignKey('objectives.id'),
        nullable=False,
    )
    coach_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
    content = db.Column(db.Text, nullable=False)
    created_at = db.Column(db.DateTime, default=utc_now_naive)
    updated_at = db.Column(db.DateTime, default=utc_now_naive, onupdate=utc_now_naive)

    # -----------------------------------------------------------------------
    # Relationships
    # -----------------------------------------------------------------------
    objective = db.relationship(
        'Objective',
        backref=db.backref('comments', lazy='dynamic', order_by='ObjectiveComment.created_at'),
    )
    coach = db.relationship('User', foreign_keys=[coach_id])