from datetime import datetime
from app.extensions import db


class AppAccess(db.Model):
    """Controls which portal users have access to which sub-applications."""
    __tablename__ = 'app_access'

    id         = db.Column(db.Integer, primary_key=True)
    user_id    = db.Column(db.Integer, db.ForeignKey('portal_users.id'), nullable=False)
    app_name   = db.Column(db.String(50), nullable=False)  # 'digiserver' | 'networkview' | 'itassets'
    is_active  = db.Column(db.Boolean, default=True)
    # Per-app role override: 'admin' | 'user' | None (None = inherit the portal-level role)
    app_role   = db.Column(db.String(20), nullable=True)
    granted_at = db.Column(db.DateTime, default=datetime.utcnow)

    __table_args__ = (db.UniqueConstraint('user_id', 'app_name', name='uq_user_app'),)

    def __repr__(self):
        return f'<AppAccess user={self.user_id} app={self.app_name} role={self.app_role}>'