using System;
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namespace Core.Economy
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{
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/// <summary>
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/// A basic model for in game currency
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/// </summary>
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public class Currency
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{
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/// <summary>
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/// How much currency there currently is
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/// </summary>
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public int currentCurrency { get; private set; }
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public int lastCurrency { get; private set; }
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/// <summary>
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/// Occurs when currency changed.
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/// </summary>
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public event Action currencyChanged;
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/// <summary>
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/// Initializes a new instance of the <see cref="Core.Economy.Currency" /> class.
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/// </summary>
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public Currency(int startingCurrency)
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{
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ChangeCurrency(startingCurrency);
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}
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/// <summary>
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/// Adds the currency.
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/// </summary>
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/// <param name="increment">the change in currency</param>
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public void AddCurrency(int increment)
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{
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if (increment == 0) return;
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ChangeCurrency(increment);
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}
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/// <summary>
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/// Method for trying to purchase, returns false for insufficient funds
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/// </summary>
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/// <returns><c>true</c>, if purchase was successful i.e. enough currency <c>false</c> otherwise.</returns>
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public bool TryPurchase(int cost)
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{
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// Cannot afford this item
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if (!CanAfford(cost))
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{
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return false;
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}
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ChangeCurrency(-cost);
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return true;
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}
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/// <summary>
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/// Determines if the specified cost is affordable.
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/// </summary>
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/// <returns><c>true</c> if this cost is affordable; otherwise, <c>false</c>.</returns>
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public bool CanAfford(int cost)
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{
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return currentCurrency >= cost;
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}
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/// <summary>
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/// Changes the currency.
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/// </summary>
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/// <param name="increment">the change in currency</param>
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protected void ChangeCurrency(int increment)
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{
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if (increment != 0)
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{
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lastCurrency = currentCurrency;
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currentCurrency += increment;
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if (currencyChanged != null)
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{
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currencyChanged();
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}
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}
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}
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}
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}
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