个性化网约车系统新年活动

import random
from datetime import datetime, timedelta

class Coupon:
    def __init__(self, code, discount, expiry_date):
        self.code = code
        self.discount = discount
        self.expiry_date = expiry_date

def generate_coupon():
    code = ''.join(random.choices('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', k=8))
    discount = random.randint(10, 50)  # 10%-50% discount
    expiry_date = datetime.now() + timedelta(days=30)  # Expires in 30 days
    return Coupon(code, discount, expiry_date)

def apply_coupon(coupon_code, order_total):
    # Here you would check the coupon code against your database
    # For simplicity, let's assume we have a hardcoded valid coupon
    valid_coupon = Coupon('ABCD1234', 20, datetime.now() + timedelta(days=15))
    
    if coupon_code == valid_coupon.code and datetime.now() < valid_coupon.expiry_date:
        return order_total * (1 - valid_coupon.discount / 100)
    else:
        return order_total

# Example usage
order_total = 100
coupon_code = 'ABCD1234'
final_amount = apply_coupon(coupon_code, order_total)
print(f"Final amount after applying coupon: ${final_amount:.2f}")