"""
Group model for managing collections of players
"""

from app.extensions import db

# Association table for many-to-many relationship between Group and Player
group_player = db.Table('group_player',
    db.Column('group_id', db.Integer, db.ForeignKey('group.id'), primary_key=True),
    db.Column('player_id', db.Integer, db.ForeignKey('player.id'), primary_key=True)
)

class Group(db.Model):
    """Group model for managing collections of players"""
    
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False, unique=True, index=True)
    description = db.Column(db.Text, nullable=True)
    playlist_version = db.Column(db.Integer, default=0)
    created_at = db.Column(db.DateTime, default=db.func.current_timestamp())
    is_active = db.Column(db.Boolean, default=True)
    
    # Relationships
    players = db.relationship('Player', secondary=group_player, backref='groups')

    def increment_playlist_version(self):
        """Increment playlist version for all players in group"""
        self.playlist_version += 1
        for player in self.players:
            player.increment_playlist_version()
        db.session.commit()

    @property
    def player_count(self):
        """Get the number of players in this group"""
        return len(self.players)

    def get_content(self):
        """Get all content from players in this group"""
        from app.models.content import Content
        if not self.players:
            return []
        
        player_ids = [player.id for player in self.players]
        return Content.query.filter(Content.player_id.in_(player_ids)).order_by(Content.position).all()

    def __repr__(self):
        return f'<Group {self.name} ({self.player_count} players)>'