Subversion Repositories SmartDukaan

'''
Created on 06-Dec-2011

@author: varungupta
'''

from shop2020.clients.UserClient import UserClient
from shop2020.model.v1.user.impl.PromotionRuleDataUtilities import \
    get_coupon_usage_count_by_user
from shop2020.thriftpy.model.v1.user.ttypes import PromotionException, Discount
from shop2020.utils.Utils import to_py_date
import datetime

def execute(cart, coupon_code, args):
    
    user_client = UserClient().get_client()
    user = user_client.getUserByCartId(cart.id)
    
    email = user.email.lower().strip()
    
    if args['couponType'] is not None and args['couponType'] != 'physical' and args['couponType'] != 'both':
        raise PromotionException(111, 'This coupon is not valid')
    
    if args['emails'] == '*' or email in [em.lower() for em in args['emails']]:
        discount_value_left = args['discount']
    else:
        raise PromotionException(111, 'You are not allowed to use this coupon')
    
    todate = datetime.datetime.now()
    if 'endOn' in args and todate > to_py_date(args['endOn']):
        raise PromotionException(113, 'This coupon is expired.')
    
    count_coupon_usage = get_coupon_usage_count_by_user(coupon_code, user.userId)
    
    if count_coupon_usage >= args['usage_limit_for_user']:
        raise PromotionException(112, 'Your usage limit for this coupon is exhausted.')
    
    discounts = []
    
    if cart.lines:
        total_discount_given = 0
        
        for line in cart.lines:
            line_total_price = line.actualPrice * line.quantity + line.insuranceAmount
            discountGivenForOneLine = 0
            while discountGivenForOneLine < line_total_price and discount_value_left > 0:
                priceOfOneItemIncludingInsurance = line.actualPrice + line.insuranceAmount/line.quantity
                if priceOfOneItemIncludingInsurance < discount_value_left:
                    discountGiven = priceOfOneItemIncludingInsurance
                    quantity = min(line.quantity,int(discount_value_left/discountGiven))
                else:
                    discountGiven = discount_value_left
                    quantity = 1
                
                discount = Discount()
                discount.cart_id = cart.id
                discount.item_id = line.itemId
                discount.discount = discountGiven
                discount.quantity = quantity
                discounts.append(discount)

                discount_value_left = discount_value_left - discountGiven*quantity 
                discountGivenForOneLine += discountGiven*quantity
            
            total_discount_given += discountGivenForOneLine
            
        cart.discountedPrice = cart.totalPrice - total_discount_given
    
    return cart, discounts

def getDiscountOnItem(item):
    return None