"""Match / scrimmage within a tryout."""
from app.extensions import db
from app.models.match_model.base import BaseMatch


class Match(BaseMatch):
    """Match / scrimmage within a tryout."""
    __tablename__ = 'matches'
    id = db.Column(db.Integer, primary_key=True)
    tryout_id = db.Column(db.Integer, db.ForeignKey('tryouts.id'), nullable=False)
    match_type = db.Column(db.String(20), nullable=False)
    team1_id = db.Column(db.Integer, db.ForeignKey('teams.id'), nullable=True)
    team2_id = db.Column(db.Integer, db.ForeignKey('teams.id'), nullable=True)

    creator = db.relationship('User', backref='created_matches')
    tryout = db.relationship('Tryout', backref='matches')
    team1 = db.relationship('Team', foreign_keys=[team1_id], backref='matches_as_team1')
    team2 = db.relationship('Team', foreign_keys=[team2_id], backref='matches_as_team2')
    # delete-orphan: without it, SQLAlchemy tries to detach participants by
    # setting match_id to NULL, which the NOT NULL column refuses — so
    # deleting any match that had participants raised IntegrityError.
    # TeamMatch.participants already declared this; Match did not.
    participants = db.relationship(
        'MatchParticipant', backref='match', lazy='dynamic',
        cascade='all, delete-orphan')

    def get_participating_players(self):
        return [p.player_id for p in self.participants.all()]