from datetime import datetime, timezone
from app import db

class Customer(db.Model):
    __tablename__ = 'customers'

    id = db.Column(db.String(50), primary_key=True) 
    msisdn = db.Column(db.String(20), unique=True, nullable=False)
    country_code = db.Column(db.String(3), nullable=False)
    created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
    updated_at = db.Column(db.DateTime, default=datetime.now(timezone.utc), onupdate=datetime.now(timezone.utc))

    @classmethod
    def is_eligible(cls, customer_id):
        customer = cls.query.filter_by(id=customer_id).first()
        if not customer:
            return False, "Customer not found"
        return True, "Customer is eligible"

    def __repr__(self):
        return f'<Customer {self.id}>'