from flask import session, jsonify
from app.models.loan import Loan
from app.utils.logger import logger
from app.api.services.base_service import BaseService
from app.api.schemas.eligibility_check import EligibilityCheckSchema
from marshmallow import ValidationError
from app.api.enums import TransactionType
from app.api.integrations import SimbrellaIntegration
from app.extensions import db
from app.models import Offer, RACCheck, Members
from app.api.services.offer_analysis import OfferAnalysis
from app.api.helpers.response_helper import ResponseHelper
from werkzeug.security import generate_password_hash, check_password_hash
from app.api.schemas.login import LoginSchema
import datetime
import jwt
import random
from app.config import Config


class LoginService(BaseService):

    @staticmethod
    def process_request(data):
        try:
            with db.session.begin():

                validated_data = LoginService.validate_data(data, LoginSchema())
                username = validated_data.get('username')
                password = validated_data.get('password')

                member = Members.get_member_by_username(username)
                # pass22 = generate_password_hash(password)
                # logger.info("Password generated = >  {}".format(pass22) )
                if not member:
                    invalid_data = {
                        "error_message": "invalid username or password",
                        "message_key": "invalid_username_or_password",
                    }
                    return ResponseHelper.success(data=invalid_data)

                pass_check =  check_password_hash(member.password, password)
                logger.info("Password check: {}".format(pass_check))
                if not member or not pass_check:
                    invalid_data = {
                        "error_message": "invalid username or password",
                        "message_key": "invalid_username_or_password",
                    }
                    return ResponseHelper.success(data=invalid_data)

                user_data = {}
                user_data["id"] = member.id,
                user_data["member_id"]= member.id,
                user_data["uid"] = str(member.uid),

                user_token = jwt.encode(
                        {"user": user_data, 'exp' : datetime.datetime.utcnow() + datetime.timedelta(minutes=3330)},
                        Config.JWT_SECRET_KEY,
                        algorithm="HS256"
                    )

                # Simulate processing
                response_data = {
                    "member_id": member.id,
                    "uid":  str(member.uid),
                    "username": member.username,
                    "account_name": member.account_name,
                    "firstname":member.firstname,
                    "lastname": member.lastname,
                    "room":  member.uid,
                    "token": user_token
                }

                return ResponseHelper.success(data=response_data)

        except ValidationError as err:

            logger.error(f"Validation Error: {getattr(err, 'messages', str(err))}")
            db.session.rollback()
            return ResponseHelper.unprocessable_entity(result_description="Validation exception")

        except  ValueError as err:
            logger.error(f"{getattr(err, 'messages', str(err))}")
            db.session.rollback()
            return ResponseHelper.error(result_description=str(err))

        except Exception as e:
            logger.error(f"An error occurred: {str(e)}", exc_info=True)
            db.session.rollback()
            return ResponseHelper.internal_server_error()

    @staticmethod
    def login_user(username, password):
        try:
            with db.session.begin():

                # validated_data = LoginService.validate_data(data, LoginSchema())
                # username = validated_data.get('username')
                # password = validated_data.get('password')
                member = Members.get_member_by_username(username)
                # pass22 = generate_password_hash(password)
                # logger.info("Password generated = >  {}".format(pass22) )
                if not member:
                    invalid_data = {
                        "error_message": "invalid username or password",
                        "message_key": "invalid_username_or_password",
                    }
                    return ResponseHelper.success(data=invalid_data)

                pass_check =  check_password_hash(member.password, password)
                logger.info("Password check: {}".format(pass_check))
                if not member or not pass_check:
                    invalid_data = {
                        "error_message": "invalid username or password",
                        "message_key": "invalid_username_or_password",
                    }
                    return ResponseHelper.success(data=invalid_data)

                user_data = {}
                user_data["id"] = member.id,
                user_data["member_id"]= member.id,
                user_data["uid"] = str(member.uid),

                user_token = jwt.encode(
                        {"user": user_data, 'exp' : datetime.datetime.utcnow() + datetime.timedelta(minutes=3330)},
                        Config.JWT_SECRET_KEY,
                        algorithm="HS256"
                    )

                # Simulate processing
                response_data = {
                    "member_id": member.id,
                    "uid":  str(member.uid),
                    "username": member.username,
                    "account_name": member.account_name,
                    "firstname":member.firstname,
                    "lastname": member.lastname,
                    "room":  member.uid,
                    "token": user_token
                }

                return ResponseHelper.success(data=response_data)

        except ValidationError as err:

            logger.error(f"Validation Error: {getattr(err, 'messages', str(err))}")
            db.session.rollback()
            return ResponseHelper.unprocessable_entity(result_description="Validation exception")

        except  ValueError as err:
            logger.error(f"{getattr(err, 'messages', str(err))}")
            db.session.rollback()
            return ResponseHelper.error(result_description=str(err))

        except Exception as e:
            logger.error(f"An error occurred: {str(e)}", exc_info=True)
            db.session.rollback()
            return ResponseHelper.internal_server_error()

    @staticmethod
    def check_loan_limits(customer_id):
        """
        Checks if a customer has exceeded the loan limits for given offer.
        """
        loan = Loan.get_customer_last_loan(customer_id)

        if not loan:
            return True

        offer_id = loan.offer_id[:5]

        offer = Offer.get_offer_by_id(offer_id)
        if not offer:
            logger.error(f"Offer not found for offer_id: {offer_id} (customer_id: {customer_id})")
            return False

        daily_count = Loan.get_daily_loan_count(customer_id, offer.product_id)

        logger.info(f"daily_count: {daily_count}, Max: {offer.max_daily_loans}")

        if offer.max_daily_loans is not None and daily_count >= offer.max_daily_loans:
            return False

        return True