const LinkedList = require("../Utility/LinkedList");

class LinkedListNode {
    constructor(key, value) {
        this.key = key;
        this.value = value;
        this.next = null;
    };
};

class InventoryList extends LinkedList {
    constructor() {
        super();
    };

    accumulateItem(key, value) {
        const entry = this.map.get(key);
        const updatedValue = entry ? entry.value.amount + value.amount : value;

        if (entry) entry.value.amount = updatedValue;
        else this.addItem(key, updatedValue); /// eeeh
    }
  
    addItem(key, value) {  
        if (!key || !value || !value.categoryID || !value.id || isNaN(value.amount)) return console.info("addItem", key, value);

        const temp = new LinkedListNode(key, value);
  
        if (!this.head) {
            this.head = temp;
            this.tail = temp;
        } else {
            this.tail.next = temp;
            this.tail = temp;
        };
  
        this.map.set(key, temp);
    }
};

module.exports = InventoryList;