//*************************************************************************************
//  DVDCollection.java    	Author:Lewis/Loftus
//
//  Represents a collection of DVD movies.
//*************************************************************************************

import java.text.NumberFormat;

public class DVDCollection
{
	private DVD[] collection;
	private int count;
	private double totalCost;

	//------------------------------------------------------------------------------------
	//  Constructor: Creates an intially empty collection.
	//------------------------------------------------------------------------------------
	public DVDCollection()
	{
		collection = new DVD[100];
		count = 0;
		totalCost = 0.0;
	}

	//--------------------------------------------------------------------------------------------
	//  Adds a DVD to the collection, increasing the size of the collection array if neccessary.
	//--------------------------------------------------------------------------------------------
	public void addDVD(String title, String director, int year, double cost, boolean bluray)
	{
		if (count == collection.length)
			increaseSize();

		collection[count] = new DVD(title, director, year, cost, bluray);
		totalCost += cost;
		count++;
	}

	//----------------------------------------------------------------------------------------------------
	//  Returns a report describing the DVD collection.
	//----------------------------------------------------------------------------------------------------
	public String toString()
	{
		NumberFormat fmt = NumberFormat.getCurrencyInstance();

		String report = "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
		report += "My DVD Collection\n\n";

		report += "Number of DVDs:" + count+"\n";
		report += "Total cost:"+fmt.format(totalCost)+"\n";
		report += "Average cost:" + fmt.format(totalCost/count);

		report += "\n\nDVD List:\n\n";

		for (int dvd =0; dvd <count; dvd++)
			report += collection[dvd].toString()+ "\n";

		return report;
	}

	//------------------------------------------------------------------------------------------------------------------
	//  Increase the capacity of the collection by creating a larger array and copying the existing collection into it.
	//------------------------------------------------------------------------------------------------------------------
	private void increaseSize()
	{
		DVD[] temp = new DVD[collection.length*2];

		for (int dvd = 0; dvd < collection.length; dvd++)
			temp[dvd] = collection[dvd];

		collection = temp;
	}
}