class CoffeeHouse{
    constructor(){
        this.products = ["Espresso","Cappuccino","Latte"];
        this.prices = ["Rs.60 - Rs.100","Rs.80 - Rs.125","Rs.100 - Rs.150"];
        this.add_ons = ["Milk","Cream","Latte"];
        this.complete_combination = {
            "Espresso":{
                "Milk":60,
                "Cream":75,
                "Latte":100
            },
            "Cappuccino":{
                "Milk":80,
                "Cream":90,
                "Latte":125
            },
            "Latte":{
                "Milk":100,
                "Cream":125,
                "Latte":150
            }
        }
    }

    displayProducts(){
        console.log("---------------COFFEES---------------");
        console.log("Sl No.    Product     Approx prices after Add-on");
        for(var i = 0;i< this.products.length;i++){
            console.log(i+1+"   "+this.products[i]+"    "+this.prices[i]);
        }

        var selected_product_idx = prompt("Enter the Serial No. of product to continue the order with.");

        var selected_product = this.products[parseInt(selected_product_idx-1)];

        console.log("Sl No.    Add-on    Total Price after Add-on");
        for(var i=0;i<this.add_ons.length;i++){
            console.log(i+1+"   "+this.add_ons[i]+"    "+this.prices[i]);
        }
        var selected_add_on_idx = prompt("Enter the Serial No. of the Add-On");

        var selected_Add_on = this.add_ons[parseInt(selected_add_on_idx-1)];
        var total_curr_cost = this.complete_combination[selected_product][selected_Add_on];
        var opt = prompt("Current order cost " + total_curr_cost + " Enter C to add Item to cart.") ;

        if (opt.toLowerCase === "c"){
            var returnOb = {
                "product" : selected_product,
                "Add-on" : selected_Add_on,
                "Cost" : total_curr_cost
            }
            return returnOb;
        }

    }
}


const coffeeHouse = new CoffeeHouse();


while(true){
    var OrderDetails = [];

    console.log("----------Welcome to Sahanas Coffe House----------");
    console.log("1.Display Menu Items");
    console.log("3.Exit");

    var selectedOpt = prompt("Enter your option number");

    if(selectedOpt === "3"){
        console.log("Thank you for ordering with us Visit Again!!");
        break;
    }

    if(selectedOpt === "1"){
       let currOrderInfo = coffeeHouse.displayProducts();
       OrderDetails.push(currOrderInfo);
       console.log(OrderDetails);
       console.log("1.Show current Order Details");
       console.log("2.Confirm Order");
       console.log("3.Go to main Menu");

       var choice = prompt("Enter your option number")

       while (true){
        if (choice === "1"){
            var total_cost = 0;
            console.log("Sl No.    Product     Add-on   Cost");
            for(var i = 0;i<OrderDetails.length;i++){
                total_cost += OrderDetails[i]["Cost"];
                console.log(i+1+"   "+OrderDetails[i]["product"]+"   "+OrderDetails[i]["Add-on"]+"   "+OrderDetails[i]["Cost"]);
            }
            console.log("Total Cost Of current Order Items :: "+total_cost);
        }
        if (choice === "2"){
            var total_cost = 0;
            console.log("----------E-Generated Bill----------");
            console.log("Sahans Coffee Shop ");
            console.log("Receipt No. " + (+Math.random*10));
            console.log("Ordered Items");
            console.log("Sl No.    Product     Add-on   Cost");
            for(var i = 0;i<OrderDetails.length;i++){
                total_cost += OrderDetails[i]["Cost"];
                console.log(i+1+"   "+OrderDetails[i]["product"]+"   "+OrderDetails[i]["Add-on"]+"   "+OrderDetails[i]["Cost"]);
            }
            console.log("Total Cost Of current Order Items :: "+total_cost);
            console.log("Thank You For Shopping with us Do Visit us Again!!");
        }
        if (choice === "3"){
            console.log("Your sure u wanna go to menu ur order items will be lost");
            var confirm = prompt("Enter 1 to confirm to go to main menu any other character to continue")
            if(confirm === "1"){
                break;
            }
        }
       }
    }
}