from api.database import (Model, SurrogatePK, db,
                          Column)


class TargetExchange(SurrogatePK, Model):
    __tablename__ = "target-exchange"
    name = Column(db.String(255), unique=True, nullable=False)

    def __init__(self, **kwargs):
        super(TargetExchange, self).__init__(**kwargs)

    def __repr__(self):
        return f'<{TargetExchange.__name__}({self.id}):{self.name!r}>'

    @staticmethod
    def ensure_created(name):
        if TargetExchange.query.filter_by(name=name).first() is None:
            TargetExchange(name=name).save()