from datetime import datetime, timezone
from app.extensions import db
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
import logging
logger = logging.getLogger(__name__)



class TransactionOffer(db.Model):
    __tablename__ = 'transaction_offers'

    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    customer_id = db.Column(db.String(50), nullable=False)
    transaction_id = db.Column(db.String(50), nullable=False)
    original_transaction = db.Column(db.String(50), nullable=True)
    offer_id = db.Column(db.String(20), nullable=False)
    product_id = db.Column(db.String(20), nullable=True)
    min_amount = db.Column(db.Float, nullable=False)
    max_amount = db.Column(db.Float, nullable=False)
    eligible_amount = db.Column(db.Float, nullable=True)
    tenor = db.Column(db.Integer, nullable=True)  # tenor in months, typically

    created_at = db.Column(db.DateTime(timezone=True), server_default=func.now())
    updated_at = db.Column(db.DateTime(timezone=True), onupdate=func.now())
    customer = relationship(
        "Customer",
        primaryjoin="Customer.id == TransactionOffer.customer_id",
        foreign_keys=[customer_id],
        back_populates="transaction_offers",
    )

    @classmethod

    def is_valid_transaction_offer(cls, transaction_offer, customer_id, product_id):
        transaction_offer = cls.query.filter_by(
            id = transaction_offer,
            customer_id = customer_id,
            # product_id = product_id
            # transaction_id = transaction_id,
            ).first()


        if not transaction_offer:
            return False
        return transaction_offer


    
    def to_dict(self):
        return {
            'id': self.id,
            'customerId': self.customer_id,
            'transactionId': self.transaction_id,
            'offerId': self.offer_id,
            'productId': self.product_id,
            'minAmount': self.min_amount,
            'maxAmount': self.max_amount,
            'eligibleAmount': self.eligible_amount,
            'tenor': self.tenor,
            'createdAt': self.created_at.isoformat() if self.created_at else None,
            'updatedAt': self.updated_at.isoformat() if self.updated_at else None,
        }

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