using System;
using System.Collections;
using System.Windows.Forms;

namespace Common.Forms
{
    public class LviNameSurnameColumnComparer : IComparer
    {
        private int column;
        MySortOrder order;

        public LviNameSurnameColumnComparer()
        {
            column = 0;
            order = MySortOrder.Ascending;
        }

        public LviNameSurnameColumnComparer(int column, MySortOrder order)
        {
            this.column = column;
            this.order = order;
        }

        public int Compare(object x, object y)
        {
            string nameX = ((ListViewItem)x).SubItems[column].Text;
            string nameY = ((ListViewItem)y).SubItems[column].Text;
            string surnameX;
            string surnameY;

            switch (order)
            {
                case MySortOrder.Ascending:
                    return String.Compare(nameX, nameY);

                case MySortOrder.Descending:
                    return String.Compare(nameY, nameX);

                case MySortOrder.Ascending2:
                    surnameX = (nameX.IndexOf(' ') > 0) ? nameX.Substring(nameX.IndexOf(' ') + 1) : nameX;
                    surnameY = (nameX.IndexOf(' ') > 0) ? nameY.Substring(nameY.IndexOf(' ') + 1) : nameY;
                    return String.Compare(surnameX, surnameY);

                case MySortOrder.Descending2:
                    surnameX = (nameX.IndexOf(' ') > 0) ? nameX.Substring(nameX.IndexOf(' ') + 1) : nameX;
                    surnameY = (nameX.IndexOf(' ') > 0) ? nameY.Substring(nameY.IndexOf(' ') + 1) : nameY;
                    return String.Compare(surnameY, surnameX);

                default:
                    return 0;
            }
        }
    }
}