using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace W4Gui.Components
{
    public partial class StringList : UserControl
    {
        private int prevSelected = -1;
        public StringList()
        {
            InitializeComponent();
        }

        public string[] Items
        {
            get
            {
                saveCurrent();

                int itmCnt = lst.Items.Count;
                string[] items = new string[itmCnt];
                for (int i = 0; i < itmCnt; i++)
                {
                    if (lst.Items[i] is null) items[i] = "(null)";
                    else items[i] = lst.Items[i].ToString();
                }

                return items;
            }
        }
        public void Clear()
        {
            lst.Items.Clear();
        }
        public void AddItem(string item)
        {
            if(item.Trim() != "")
                lst.Items.Add(item);
        }

        public void LoadData(string[] items)
        {
            lst.Items.Clear();
            lst.Items.AddRange(items);
        }

        private void addBtn_Click(object sender, EventArgs e)
        {
            string val = newEntry.Text.Trim();
            AddItem(val);
        }

        private void delBtn_Click(object sender, EventArgs e)
        {
            int sel = lst.SelectedIndex;
            if (sel >= 0)
                lst.Items.RemoveAt(sel);
        }

        private void saveCurrent()
        {
            int sel = lst.SelectedIndex;
            if (sel >= 0)
                lst.Items[sel] = newEntry.Text;
        }

        private void newEntry_KeyDown(object sender, KeyEventArgs e)
        {
            if(e.KeyData == Keys.Enter)
            {
                e.Handled = true;
                saveCurrent();
            }
        }

        private void lst_KeyDown(object sender, KeyEventArgs e)
        {
            if(e.KeyData == Keys.Delete)
            {
                e.Handled = true;
                delBtn_Click(sender, e);
            }
        }



        private void lst_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (prevSelected >= 0)
                lst.Items[prevSelected] = newEntry.Text;

            if (lst.SelectedIndex >= 0)
                newEntry.Text = lst.Items[lst.SelectedIndex].ToString();

            prevSelected = lst.SelectedIndex;
        }

        private void ListAddUpdateDel_Load(object sender, EventArgs e)
        {

        }
    }
}