class Cashinator {

	//initialize the cash register with a price list in a simple comma-delimited format.
	// The price list contains product names, SKU's (stock-keeping units, i.e., the product id),
	// the price per unit, and whether the product is taxable. (Staple groceries are typically not taxable.)
	// initialize the register with a starting amount of money, a sales tax percentage.

	constructor(pricelist, startingMoney, salesTax){
			this.pricelist = pricelist.parseCSV; //seems like price list is a csvfile, parse csv will turn into an object with SKU as key
			this.balance = startingMoney || 0;
			this.salesTax = salesTax || 0;
			this.transactions = [];
			this.lastTransactionId = 0;
			this.inProgressTransaction;
	}


	showBalance(){
		//display current balance on screen
	}

	// view a report of all the transactions that have occurred since register initialization.
	// Transactions are listed by id, # of items purchased, and the transaction amount.
	showTransactionReport(){
		//for each transaction in transaction array
			//print id, items.length, total
	}
	//search all items purchased since register initialization. I can do a partial string match on product name
	searchRegisterItems(searchString){
		//?? not sure point of  this function
	}

	startTransaction(){
		//increment the lastTransactionId
		//create a new Transaction, passing in new id
		//set this transaction to the inProgressTransaction
	}

	scanItem(sku){
		//get the item from the pricelist used skuKey
		//call transaction.addItem to add to array
		//call display.displayCustomer(item, transaction.subtotal) to show the updated running values
	}

	endTransaction(){
		//call transaction.transaction end
		//
	}

	handleCustomerMoney(){

	}

}

class Transaction{
	constructor(id){
		this.id = id;
		this.createdAt = Date.now();
		this.items = []
		this.subtotal = 0;
		this.nonTaxableAmount = 0; //we could do a reduce function, but it will be more efficient to just add to values as they are added
	}
	// As a cashier, I can scan one item, whereupon that item is added to the transaction.
	addItem(item){
		//push the item to the items array
		//add item.price to subtotal
	}

	transactionEnd(taxRate){
		//calculate this.total and set it
			//Apply sales tax to (subtotal - nonTaxableAmount)
			//add subtotal+tax to nonTaxableAmount
	}
	printReciept(){
		//for each item in the items array, print details
    //print subtotal and total
	}

}

class Display{
	constructor(){
 		this.currentDisplay = ''
 	}
 	displayCustomer(item, subtotal){
 		this.currentDisplay = //formatted item and subtotal
	}
	displayFinal(total){
		//show the final total of the transation
	}
	displayCashier(){
		//if the inProgressTransaction is undefined, show the currrent Cashinator balance
		//else, show displayCustomer
	}
}