#include <iostream>
#include <string>
#include <vector>
using namespace std;

class Item {
private:
    unsigned long itemID;
    string itemName;
    float itemCost;
    int quantity;
public:
    static bool isNoItem(Item& item)
    {
        return item.getID() == -1 && item.getCost() == -1 && item.getName() == "No Item" && item.getQuant() == -1;
    }

    Item(int id, string name, int cost, int quantity) : itemID(id), itemName(name), itemCost(cost), quantity(quantity) { }

    void setID(unsigned long itemID) { this->itemID = itemID; };
    void setName(string itemName) { this->itemName = itemName; };
    void setCost(float itemCost) { this->itemCost = itemCost; };
    void setQuant(int quantity) { this->quantity = quantity; };
    unsigned long getID(void) { return itemID; };
    string getName(void) { return itemName; };
    float getCost(void) { return itemCost; };
    int getQuant(void) { return quantity; };
};

class ItemManager
{
    vector<Item> items;

public:
    ItemManager() { items = vector<Item>(); }

    int itemsLength() { return items.size(); }

    void addItem(int id, string name, int cost, int quantity)
    {
        items.push_back(Item(id, name, cost, quantity));
    }

    Item getItemByIndex(int index)
    {
        return items[index];
    }

    Item getItemByID(int id)
    {
        for (int i = 0; i < itemsLength(); i++)
            if (items[i].getID() == id)
                return items[i];

        return Item(-1, "No Item", -1, -1);
    }

    Item getItemByName(string name)
    {
        for (int i = 0; i < itemsLength(); i++)
            if (items[i].getName() == name)
                return items[i];

        return Item(-1, "No Item", -1, -1);
    }
};

void printItem(Item item)
{
    if (Item::isNoItem(item))
    {
        cout << "No Item Found." << endl;
        return;
    }

    cout << endl;
    cout << "ID: " << item.getID() << endl;
    cout << "Name: " << item.getName() << endl;
    cout << "Cost: " << item.getCost() << endl;
    cout << "Quantity: " << item.getQuant() << endl;
    cout << endl;
}

int main(void) {
    ItemManager itemManager = ItemManager();
    int sel = 0;
    int index = 0;

    itemManager.addItem(1, "Sword", 50, 1);
    itemManager.addItem(2, "Spear", 25, 1);

    cout << "Inventory Management System Menu";
    cout << "\n--------------------------------\n";
    do
    {
        cout << "1. Add a new item\n2. Print item list\n3. Find item by ID\n4. Find item by name\n5. Quit";
        cout << "\nPlease select an option: ";
        cin >> sel;

        if (sel == 1)
        {
            int id = -1;
            string name = "";
            int cost;
            int quantity;

            cout << "Enter Item ID: ";
            cin >> id;
            cout << "Enter Item Name: ";
            cin >> name;
            cout << "Enter Item Cost: ";
            cin >> cost;
            cout << "Enter Item Quantity: ";
            cin >> quantity;

            itemManager.addItem(id, name, cost, quantity);
        }

        else if (sel == 2)
        {
            for (int i = 0; i < itemManager.itemsLength(); i++)
            {
                Item item = itemManager.getItemByIndex(i);
                printItem(item);
            }
        }

        else if (sel == 3)
        {
            int idLookup = -1;
            cout << "Enter Item ID: ";
            cin >> idLookup;
            Item item = itemManager.getItemByID(idLookup);
            printItem(item);
        }

        else if (sel == 4)
        {
            string itemName = "";
            cout << "Enter Item Name: ";
            cin >> itemName;
            Item item = itemManager.getItemByName(itemName);
            printItem(item);
        }
    }

    while (sel != 5);
}