from app import db
from app.utils.time_utils import now_eastern


class InspectorAssignment(db.Model):
    __tablename__ = 'inspector_assignments'

    id         = db.Column(db.Integer, primary_key=True)
    user_id    = db.Column(db.Integer,
                           db.ForeignKey('users.id', ondelete='CASCADE'),
                           nullable=False, index=True)
    project_id = db.Column(db.Integer,
                           db.ForeignKey('projects.id', ondelete='CASCADE'),
                           nullable=False)
    created_at = db.Column(db.DateTime, nullable=False, default=now_eastern)

    inspector = db.relationship('User',    backref='inspector_assignments')
    project   = db.relationship('Project', backref='inspector_assignments')

    __table_args__ = (
        db.UniqueConstraint('user_id', 'project_id', name='uq_inspector_project'),
    )

    def __repr__(self):
        return f'<InspectorAssignment user={self.user_id} project={self.project_id}>'