from datetime import datetime, timezone
from app.extensions import db
from app.models import account
from sqlalchemy.exc import IntegrityError
from sqlalchemy import and_, or_, not_
from sqlalchemy.sql import func
from app.api.enums import TransactionType

import logging
logger = logging.getLogger(__name__)



class Transaction(db.Model):
    __tablename__ = 'transactions'
    id = db.Column(
        db.Integer,
        primary_key=True,
        autoincrement=True,
    )
    transaction_id = db.Column(db.String(50), nullable=False)
    account_id = db.Column(db.String(50), nullable=True)
    customer_id = db.Column(db.String(50), nullable=True)
    type = db.Column(db.String(50), nullable=False)
    channel = db.Column(db.String(50), nullable=False)
    phone_number = db.Column(db.String(50), nullable=True)
    created_at = db.Column(db.DateTime(timezone=True), server_default=func.now())
    updated_at = db.Column(db.DateTime(timezone=True), server_default=func.now(), onupdate=func.now())

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

    @classmethod
    def create_transaction(cls, transaction_id, account_id, customer_id, type, channel):

        # if cls.query.filter_by(transaction_id=transaction_id).first():
        #     raise ValueError("Duplicate Transaction")

        if cls.query.filter(and_(cls.transaction_id == transaction_id, cls.type == type)).first():
            if type == TransactionType.REPAYMENT:
                logger.info('Repayment transaction already exists :::: But we like to continue.')
                now = datetime.now()
                type = TransactionType.REPAYMENT + '.'+ now.strftime("%Y%m%d%H%M%S")
                logger.info('Modify Type  :::: {0}'.format(type))
            else:
                raise ValueError("Duplicate Transaction")

        transaction = cls(
            transaction_id=transaction_id,
            customer_id=customer_id,
            account_id=account_id,
            type=type,
            channel=channel,
            created_at=datetime.now(timezone.utc),
            updated_at=datetime.now(timezone.utc)
        )

        try:
            db.session.add(transaction)
        except IntegrityError as err:
            raise ValueError(f"Database integrity error: {err}")

        return transaction

    @classmethod
    def get_transaction_by_id(cls, transaction_id):
        return cls.query.get(transaction_id)