package org.gcube.portlets.user.accountingdashboard.server.util;

import java.util.List;

import org.gcube.accounting.accounting.summary.access.model.ScopeDescriptor;

public class CocktailSort {

	public enum Order {
		ASC, DESC
	}

	public static void sort(List<ScopeDescriptor> list, Order order) {
		if (list != null && list.size() > 1) {

			// `begin` ed `end` first and last index to check
			int begin = -1;
			int end = list.size() - 1;
			boolean swapped;
			do {
				swapped = false;
				// increases `begin` because the elements before `begin` are
				// sorted correctly
				begin = begin + 1;
				for (int i = begin; i < end; i++) {
					if (order == Order.ASC) {
						if (list.get(i).getName().compareTo(list.get(i + 1).getName()) < 0) {
							ScopeDescriptor sd = list.get(i);
							list.set(i, list.get(i + 1));
							list.set(i + 1, sd);
							swapped = true;
						}
					} else {
						if (list.get(i).getName().compareTo(list.get(i + 1).getName()) > 0) {
							ScopeDescriptor sd = list.get(i);
							list.set(i, list.get(i + 1));
							list.set(i + 1, sd);
							swapped = true;
						}
					}

				}
				if (swapped == false) {
					break;
				}
				swapped = false;
				// decreases `end` because the elements after `end` are sorted
				// correctly
				end = end - 1;
				for (int i = end; i > begin; i--) {
					if (order == Order.ASC) {
						if (list.get(i).getName().compareTo(list.get(i - 1).getName()) > 0) {
							ScopeDescriptor sd = list.get(i);
							list.set(i, list.get(i - 1));
							list.set(i - 1, sd);
							swapped = true;
						}
					} else {
						if (list.get(i).getName().compareTo(list.get(i - 1).getName()) < 0) {
							ScopeDescriptor sd = list.get(i);
							list.set(i, list.get(i - 1));
							list.set(i - 1, sd);
							swapped = true;
						}
					}
				}
			} while (swapped);
		}
	}

}