Solution

app/car.py

@@ -0,0 +1,8 @@
+from dataclasses import dataclass
+
+
+@dataclass
+class Car:
+
+    brand: str
+    fuel_consumption: float

app/customer.py

@@ -0,0 +1,46 @@
+from __future__ import annotations
+from dataclasses import dataclass
+from math import sqrt
+from app.car import Car
+from app.shop import Shop
+
+
+@dataclass
+class Customer:
+
+    name: str
+    product_cart: dict
+    location: list[int]
+    money: int | float
+    car: Car
+
+    def calculate_distance(self, shop: Shop) -> int | float:
+        x1, y1 = (self.location[0], self.location[1])
+        x2, y2 = (shop.location[0], shop.location[1])
+
+        return sqrt(((x2 - x1) ** 2) + ((y2 - y1) ** 2))
+
+    def calculate_travel_cost(
+        self,
+        fuel_price: float,
+        shop: Shop
+    ) -> int | float:
+
+        l_per_km = self.car.fuel_consumption / 100
+        distance = self.calculate_distance(shop)
+        return round(l_per_km * distance * fuel_price * 2, 2)
+
+    def calculate_cart_cost(self, shop: Shop) -> int | float:
+        cart_cost = 0
+        for item in self.product_cart:
+            cart_cost += self.product_cart[item] * shop.products[item]
+        return cart_cost
+
+    def calculate_total_cost(
+        self,
+        fuel_price: float,
+        shop: Shop
+    ) -> int | float:
+        travel_cost = self.calculate_travel_cost(fuel_price, shop)
+        cart_cost = self.calculate_cart_cost(shop)
+        return travel_cost + cart_cost

app/data.py

@@ -0,0 +1,39 @@
+from app.customer import Customer
+from app.car import Car
+from app.shop import Shop
+import json
+
+
+def process_json_data() -> list:
+    customers = []
+    shops = []
+
+    with open("app/config.json") as file:
+        data = json.load(file)
+
+        fuel_price = data["FUEL_PRICE"]
+
+        for customer in data["customers"]:
+            customers.append(
+                Customer(
+                    customer["name"],
+                    customer["product_cart"],
+                    customer["location"],
+                    customer["money"],
+                    Car(
+                        customer["car"]["brand"],
+                        customer["car"]["fuel_consumption"]
+                    )
+                )
+            )
+
+        for shop in data["shops"]:
+            shops.append(
+                Shop(
+                    shop["name"],
+                    shop["location"],
+                    shop["products"],
+                )
+            )
+
+    return [fuel_price, customers, shops]

app/main.py

@@ -1,3 +1,52 @@
-def shop_trip():
-    # write your code here
-    pass
+from __future__ import annotations
+from app.data import process_json_data
+import datetime
+
+
+def shop_trip() -> None:
+    data = process_json_data()
+
+    fuel_price = data[0]
+    customers = data[1]
+    shops = data[2]
+
+    for customer in customers:
+        print(f"{customer.name} has {customer.money} dollars")
+
+        cheapest_shop = [None, 0]
+        for shop in shops:
+            total_cost = customer.calculate_total_cost(fuel_price, shop)
+            if total_cost < cheapest_shop[1] or cheapest_shop[1] == 0:
+                cheapest_shop[0] = shop
+                cheapest_shop[1] = total_cost
+            print(f"{customer.name}'s trip to "
+                  f"the {shop.name} costs {total_cost}")
+
+        if customer.money > cheapest_shop[1]:
+            print(f"{customer.name} rides to {cheapest_shop[0].name}")
+            print(
+                "\nDate:",
+                datetime.datetime.now().strftime("%d/%m/%Y %H:%M:%S")
+            )
+            print(f"Thanks, {customer.name}, for your purchase!")
+            print("You have bought:")
+
+            total_products_cost = 0
+            for key, value in customer.product_cart.items():
+                cost_per_product = (
+                    customer.product_cart[key] * cheapest_shop[0].products[key]
+                )
+                if cost_per_product.is_integer():
+                    cost_per_product = int(cost_per_product)
+                total_products_cost += cost_per_product
+                print(f"{value} {key}s for {cost_per_product} dollars")
+
+            print(f"Total cost is {total_products_cost} dollars")
+            print("See you again!\n")
+
+            print(f"{customer.name} rides home")
+            print(f"{customer.name} now has "
+                  f"{customer.money - cheapest_shop[1]} dollars\n")
+        else:
+            print(f"{customer.name} doesn't have enough money "
+                  f"to make a purchase in any shop")

app/shop.py

@@ -0,0 +1,9 @@
+from dataclasses import dataclass
+
+
+@dataclass
+class Shop:
+
+    name: str
+    location: list
+    products: dict