/*
 * CSModePanel.cs
 * Authors: Bradley R. Blankenship
 * Copyright (c) 2007-2008 Cornell University

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

using System;
using System.Collections.Generic;
using System.Text;
using tAC_Engine.GUI;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework;
using Util;

namespace ColonySim.GUI
{

    /// <summary>
    /// Panel for selecting between the two selectable modes,
    /// Selection and Deletion.
    /// </summary>
    class CSModePanel : GUIRadioContainer
    {
        #region Enums

        /// <summary>
        /// Enumeration of the available modes that can be clicked to be
        /// selected.
        /// </summary>
        public enum Modes
        {
            SELECTION,
            DELETION
        }

        #endregion

        #region Fields

        // Our current mode
        Modes mCurrentMode;

        // The button for selecting Selection
        GUIButton mSelectionButton;

        // The button for selecting Deletion
        GUIButton mDeletionButton;

        // The background
        Texture2D mBackground;

        #endregion

        #region Properties

        /// <summary>
        /// The currently selected mode.
        /// </summary>
        public Modes CurrentMode
        {
            get { return mCurrentMode; }
        }

        #endregion

        public CSModePanel()
        {
            mSelectionButton = new GUIButton();
            mDeletionButton = new GUIButton();

            // Add the buttons
            this.Add(mSelectionButton);
            this.Add(mDeletionButton);
        }

        #region Initialize

        /// <summary>
        /// Initialize our content.
        /// </summary>
        public override void Initialize()
        {
            mSelectionButton.Size = new Vector2(Size.X - 6, Size.Y / 2 - 9);
            mSelectionButton.Position = new Vector2(Position.X + 3, Position.Y + 3);
            mSelectionButton.ButtonPressed += new EventHandler(mSelectionButton_ButtonPressed);

            mDeletionButton.Size = new Vector2(Size.X - 6, Size.Y / 2 - 9);
            mDeletionButton.Position = new Vector2(Position.X + 3, mSelectionButton.Bounds.Bottom + 3);
            mDeletionButton.ButtonPressed += new EventHandler(mDeletionButton_ButtonPressed);

            base.Initialize();
        }

        /// <summary>
        /// Load our content.
        /// </summary>
        public override void LoadContent()
        {
            // Get our background
            mBackground = mParentScreen.Content.Load<Texture2D>(@"Textures\ResourceBar");

            // Get our buttons' textures
            mSelectionButton.ButtonUp = mParentScreen.Content.Load<Texture2D>(@"Textures\GUI\SelectionUp");
            mSelectionButton.ButtonDown = mParentScreen.Content.Load<Texture2D>(@"Textures\GUI\SelectionDown");

            mDeletionButton.ButtonUp = mParentScreen.Content.Load<Texture2D>(@"Textures\GUI\DeletionUp");
            mDeletionButton.ButtonDown = mParentScreen.Content.Load<Texture2D>(@"Textures\GUI\DeletionDown");

            // Base call
            base.LoadContent();
        }

        #endregion

        #region Event Handling

        public event EventHandler ModeChanged;

        void mDeletionButton_ButtonPressed(object sender, EventArgs e)
        {
            mCurrentMode = Modes.DELETION;
            
            //Invoke Event
            if (ModeChanged != null)
                ModeChanged.Invoke(this, EventArgs.Empty);
        }

        void mSelectionButton_ButtonPressed(object sender, EventArgs e)
        {
            mCurrentMode = Modes.SELECTION;

            //Invoke Event
            if (ModeChanged != null)
                ModeChanged.Invoke(this, EventArgs.Empty);
        }

        #endregion

        #region Draw

        /// <summary>
        /// Draw this with a background
        /// </summary>
        /// <param name="gameTime"></param>
        public override void Draw(GameTime gameTime)
        {
            // If we have a background
            if (mBackground != null)
            {
                // Draw our background
                Batch.Draw(mBackground, Bounds, Color.White);
            }

            // Draw the rest
            base.Draw(gameTime);
        }

        #endregion
    }
}