from datetime import datetime
from app import db

class Account(db.Model):
    __tablename__ = 'accounts'
    __table_args__ = {'schema': 'flask_app'} 

    id = db.Column(db.String(50), primary_key=True)  
    customer_id = db.Column(db.String(50), nullable=False)
    account_type = db.Column(db.String(50))
    status = db.Column(db.String(20), default='active')
    lien_amount = db.Column(db.Float, default=0.0)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    # Database relationship
    # customer = db.relationship(
    #     'Customer',
    #     primaryjoin='Account.customer_id == Customer.id',
    #     backref='accounts',
    #     foreign_keys=[customer_id],
    #     viewonly=True
    # )

    @classmethod
    def is_valid_account(cls, account_id, customer_id):
        account = cls.query.filter_by(id=account_id, customer_id=customer_id).first()
        if not account:
            return False, "Account not found or doesn't belong to customer"
        if account.lien_amount > 0:
            return False, "Account has an existing lien"
        return True, "Account is valid"

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