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

namespace TaskMan
{
    public partial class ListEntry : UserControl
    {
        
        public ListEntry()
        {
            InitializeComponent();
            flowLayoutPanel1.Width = this.Width - 35;
            addEntryBox();
        }
        // We ensure that there is always one and only one empty box.
        private TextBox emptyControl;
        private List<TextBox> entryControls=new List<TextBox>();
        private Dictionary<TextBox, Task> m_tasks = new Dictionary<TextBox, Task>();

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            if (!loadingTasks)
            {
                TextBox sendingControl = (TextBox)sender;
                if (sendingControl == emptyControl)
                {
                    // Text has been entered in the empty box, so create a new task associated with this
                    //control and create a new empty box.
                    m_tasks.Add(sendingControl, new Task(sendingControl.Text));
                    addEntryBox();
                }
                else if (sendingControl.Text == "")
                {
                    // one box has become empty. This becomes the one empty box, so the other is deleted
                    emptyControl.Parent = null;
                    entryControls.Remove(emptyControl);
                    emptyControl = sendingControl;
                    m_tasks.Remove(sendingControl);

                }
                else
                {
                    m_tasks[sendingControl].desc = sendingControl.Text;

                }
            }
        }

        private void addEntryBox(){
              TextBox tb = new TextBox();
                emptyControl = tb;
                tb.Width = flowLayoutPanel1.Width-5;
               
            tb.TextChanged +=  
                    textBox1_TextChanged;
                tb.Parent = flowLayoutPanel1;
                entryControls.Add(tb);
            
        }
        private bool loadingTasks=false;
        public void setTask(List<Task>    S){
            m_tasks.Clear();
            loadingTasks = true;
            foreach (Task s in S)
            {       
                emptyControl.Text = s.desc;
                m_tasks.Add(emptyControl, s);
                addEntryBox();
               
            }

            loadingTasks = false;
        }

        public List<Task> tasks()
        {
            List<Task> t=new List<Task>();
           
            foreach (KeyValuePair<TextBox,Task> v in m_tasks)
            {
                t.Add(v.Value);
            }

        
  //          foreach (TextBox tb in entryControls) {
    //            // one text box is always empty, so ignore it.
      //          if (tb != emptyControl) t.Add(new Task(tb.Text));
        //    }
            return t;
        }

    }
}