using System;
using System.ComponentModel;
using System.Linq;
using System.Web.UI.WebControls;

using CMS.ExtendedControls;
using CMS.Helpers;
using CMS.UIControls;

public partial class CMSAdminControls_UI_Selectors_ItemSelection : CMSUserControl
{
    #region "Variables"

    private string[,] mLeftItems;
    private string[,] mRightItems;

    private bool mShowUpDownButtons = true;

    #endregion


    #region "Public properties"

    /// <summary>
    /// Left column label.
    /// </summary>
    public Label LeftColumnLabel
    {
        get
        {
            return lblLeftColumn;
        }
        set
        {
            lblLeftColumn = value;
        }
    }


    /// <summary>
    /// Right column label.
    /// </summary>
    public Label RightColumnLabel
    {
        get
        {
            return lblRightColumn;
        }
        set
        {
            lblRightColumn = value;
        }
    }


    /// <summary>
    /// Right column list box.
    /// </summary>
    public CMSListBox RightColumListBox
    {
        get
        {
            return lstRightColumn;
        }
        set
        {
            lstRightColumn = value;
        }
    }


    /// <summary>
    /// Left column list box.
    /// </summary>
    public CMSListBox LeftColumListBox
    {
        get
        {
            return lstLeftColumn;
        }
        set
        {
            lstLeftColumn = value;
        }
    }


    /// <summary>
    /// Moves right button.
    /// </summary>
    public CMSButton MoveRightButton
    {
        get
        {
            return btnMoveRight;
        }
        set
        {
            btnMoveRight = value;
        }
    }


    /// <summary>
    /// Moves left button.
    /// </summary>
    public CMSButton MoveLeftButton
    {
        get
        {
            return btnMoveLeft;
        }
        set
        {
            btnMoveLeft = value;
        }
    }


    /// <summary>
    /// Left column items.
    /// </summary>
    [Category("Data"), Description("Left column items.")]
    public string[,] LeftItems
    {
        get
        {
            return mLeftItems;
        }
        set
        {
            mLeftItems = value;
        }
    }


    /// <summary>
    /// Right column items.
    /// </summary>
    [Category("Data"), Description("Right column items.")]
    public string[,] RightItems
    {
        get
        {
            return mRightItems;
        }
        set
        {
            mRightItems = value;
        }
    }


    /// <summary>
    /// Gets or sets the value which determines whether to show up / down buttons.
    /// </summary>
    public bool ShowUpDownButtons
    {
        get
        {
            return mShowUpDownButtons;
        }
        set
        {
            mShowUpDownButtons = value;
        }
    }

    #endregion


    protected void Page_Load(object sender, EventArgs e)
    {
        if (!mShowUpDownButtons)
        {
            btnDown.Visible = false;
            btnUp.Visible = false;
        }
        else
        {
            btnUp.Text = GetString("ItemSelection.btnUp");
            btnDown.Text = GetString("ItemSelection.btnDown");

            btnDown.Enabled = false;
            btnUp.Enabled = false;
        }

        plcButtons.Visible = mShowUpDownButtons;
        if (!RequestHelper.IsPostBack())
        {
            fill();
        }
        else
        {
            ChangeProperties();
        }
    }


    /// <summary>
    /// Fill Column list boxs.
    /// </summary>
    public void fill()
    {
        lstLeftColumn.Items.Clear();
        lstRightColumn.Items.Clear();
        // Fill left column
        if (mLeftItems != null)
        {
            for (int i = LeftItems.GetLowerBound(0); i <= LeftItems.GetUpperBound(0); i++)
            {
                ListItem li = new ListItem(LeftItems[i, 1], LeftItems[i, 0]);

                lstLeftColumn.Items.Add(li);
            }
        }

        // Fill right column
        if (mRightItems != null)
        {
            for (int i = RightItems.GetLowerBound(0); i <= RightItems.GetUpperBound(0); i++)
            {
                ListItem li = new ListItem(RightItems[i, 1], RightItems[i, 0]);
                lstRightColumn.Items.Add(li);
            }
        }
    }


    /// <summary>
    /// Moves selected items from left column to right column.
    /// </summary>
    protected void MoveRightButton_Click(object sender, EventArgs e)
    {
        if ((LeftItems != null) && (LeftItems.Length > 0))
        {
            string args = "";

            foreach (var item in lstLeftColumn.GetSelectedItems().ToList())
            {
                args += ";" + item.Value;
                item.Selected = false;
                lstRightColumn.Items.Add(item);
                lstLeftColumn.Items.Remove(item);
            }
            ChangeProperties();

            // Raise the event
            if (OnMoveRight != null)
            {
                OnMoveRight(sender, new CommandEventArgs("roleid", args));
            }
        }
    }


    /// <summary>
    /// Moves Selected items from right column to left column.
    /// </summary>
    protected void MoveLeftButton_Click(object sender, EventArgs e)
    {
        if ((RightItems != null) && (RightItems.Length > 0))
        {
            string args = "";
            
            foreach (var item in lstRightColumn.GetSelectedItems().ToList())
            {
                args += ";" + item.Value;
                item.Selected = false;
                lstLeftColumn.Items.Add(item);
                lstRightColumn.Items.Remove(item);
            }
            btnDown.Enabled = false;
            btnUp.Enabled = false;
            ChangeProperties();

            // Raise the event
            if (OnMoveLeft != null)
            {
                OnMoveLeft(sender, new CommandEventArgs("roleid", args));
            }
        }
    }


    /// <summary>
    /// Change data in LeftItems and RightItems.
    /// </summary>
    public void ChangeProperties()
    {
        string[,] mLeft = new string[lstLeftColumn.Items.Count,2];
        string[,] mRight = new string[lstRightColumn.Items.Count,2];

        // LeftItems properties
        for (int i = 0; i < lstLeftColumn.Items.Count; i++)
        {
            mLeft[i, 0] = lstLeftColumn.Items[i].Value;
            mLeft[i, 1] = lstLeftColumn.Items[i].Text;
        }

        // RightItems properties
        for (int i = 0; i < lstRightColumn.Items.Count; i++)
        {
            mRight[i, 0] = lstRightColumn.Items[i].Value;
            mRight[i, 1] = lstRightColumn.Items[i].Text;
        }

        // Save it
        if (lstLeftColumn.Items.Count > 0)
        {
            LeftItems = mLeft;
        }
        else
        {
            LeftItems = null;
        }

        if (lstRightColumn.Items.Count > 0)
        {
            RightItems = mRight;
        }
        else
        {
            RightItems = null;
        }

        if (lstRightColumn.SelectedItem != null)
        {
            btnDown.Enabled = true;
            btnUp.Enabled = true;
        }
    }


    #region "Handle event"

    public event CommandEventHandler OnMoveLeft;
    public event CommandEventHandler OnMoveRight;
    public event EventHandler OnPostBack;


    public void lstRightColumn_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (OnPostBack != null)
        {
            OnPostBack(sender, e);
        }
    }

    #endregion


    /// <summary>
    /// MoveUp selected column.
    /// </summary>
    protected void btnUp_Click(object sender, EventArgs e)
    {
        if (lstRightColumn.SelectedItem != null && lstRightColumn.SelectedIndex > 0)
        {
            int index = lstRightColumn.SelectedIndex;

            lstRightColumn.Items[index].Selected = false;
            lstRightColumn.Items[index - 1].Selected = false;

            ListItem mDown = new ListItem(lstRightColumn.Items[index - 1].Text, lstRightColumn.Items[index - 1].Value);
            ListItem mUp = new ListItem(lstRightColumn.Items[index].Text, lstRightColumn.Items[index].Value);

            lstRightColumn.Items[index].Text = mDown.Text;
            lstRightColumn.Items[index].Value = mDown.Value;
            lstRightColumn.Items[index - 1].Text = mUp.Text;
            lstRightColumn.Items[index - 1].Value = mUp.Value;


            string mItem = RightItems[index, 0];
            RightItems[index, 0] = RightItems[index - 1, 0];
            RightItems[index - 1, 0] = mItem;
            mItem = RightItems[index, 1];
            RightItems[index, 1] = RightItems[index - 1, 1];
            RightItems[index - 1, 1] = mItem;

            lstRightColumn.Items[index - 1].Selected = true;
        }
    }


    /// <summary>
    /// MoveDown selected column.
    /// </summary>
    protected void btnDown_Click(object sender, EventArgs e)
    {
        if (lstRightColumn.SelectedItem != null && lstRightColumn.SelectedIndex < lstRightColumn.Items.Count - 1)
        {
            int index = lstRightColumn.SelectedIndex;

            lstRightColumn.Items[index].Selected = false;
            lstRightColumn.Items[index + 1].Selected = false;

            ListItem mDown = new ListItem(lstRightColumn.Items[index + 1].Text, lstRightColumn.Items[index + 1].Value);
            ListItem mUp = new ListItem(lstRightColumn.Items[index].Text, lstRightColumn.Items[index].Value);

            lstRightColumn.Items[index].Text = mDown.Text;
            lstRightColumn.Items[index].Value = mDown.Value;
            lstRightColumn.Items[index + 1].Text = mUp.Text;
            lstRightColumn.Items[index + 1].Value = mUp.Value;

            string mItem = RightItems[index, 0];
            RightItems[index, 0] = RightItems[index + 1, 0];
            RightItems[index + 1, 0] = mItem;
            mItem = RightItems[index, 1];
            RightItems[index, 1] = RightItems[index + 1, 1];
            RightItems[index + 1, 1] = mItem;

            lstRightColumn.Items[index + 1].Selected = true;
        }
    }
}