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 IntList : UserControl
    {
        private int lastIndex = -1;
        private string label = "%n";
        private List<int> valuesList = new List<int>();
        public string Label
        {
            get
            {
                return label;
            }
            set
            {
                label = value;
                createNumbersList();
            }
        }

        public int[] Values
        {
            get
            {
                this.save();
                return this.valuesList.ToArray();
            }
        }
        private string formatStr(int idx)
        {
            return label.Replace("%n", (idx + 1).ToString());
        }
        public void DelInt(int idx)
        {
            this.lastIndex = -1;
            this.valuesList.RemoveAt(idx);
            this.numberList.Items.RemoveAt(idx);
            createNumbersList();
            this.numberList.SelectedIndex = idx - 1;
        }

        private void selectFirst()
        {
            if (this.numberList.SelectedIndex < 0)
                if (this.numberList.Items.Count > 0)
                    this.numberList.SelectedIndex = 0;
        }
        public void LoadItems(int[] values)
        {
            this.valuesList.Clear();
            this.numberList.Items.Clear();

            foreach(int itm in values)
            {
                this.AddInt(itm);
            }
            selectFirst();
        }

        public void AddInt(int value)
        {
            int idx = this.valuesList.Count;
            this.valuesList.Add(value);
            this.numberList.Items.Add(formatStr(idx));
        }
        private void createNumbersList()
        {
            this.save();
            this.numberList.Items.Clear();
            for (int i = 0; i < valuesList.Count; i++)
                this.numberList.Items.Add(formatStr(i));

            lastIndex = -1;
            selectFirst();
        }

        public IntList()
        {
            InitializeComponent();
        }
        private void save()
        {
            if (lastIndex >= 0)
                valuesList[lastIndex] = valueBox.Value;
        }

        private void load()
        {
            if (numberList.SelectedIndex >= 0)
                valueBox.Value = valuesList[numberList.SelectedIndex];
        }

        private void numberList_SelectedIndexChanged(object sender, EventArgs e)
        {
            this.save();
            this.load();

            lastIndex = numberList.SelectedIndex;
        }

        private void btnAddNumber_Click(object sender, EventArgs e)
        {
            AddInt(0);
            numberList.SelectedIndex = valuesList.Count - 1;
        }

        private void btnDelNumber_Click(object sender, EventArgs e)
        {
            DelInt(numberList.SelectedIndex);
        }
    }
}