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

namespace tAC_Engine.GUI
{
    /// <summary>
    /// A GUIPanel that displays a message dialog.
    /// </summary>
    public class GUIMessageDialog : GUIPanel
    {
        protected GUIButton mOkayButton;
        protected GUIButton mCancelButton;
        protected SpriteFont font;
        protected GUILabel mMessageLabel;
        protected string mMessage;

        public GUIMessageDialog(string message)
        {
            mMessage = message;
        }

        /// <summary>
        /// Initializes text input and buttons.
        /// </summary>
        public override void Initialize()
        {
            mMessageLabel = new GUILabel();
            mMessageLabel.Text = mMessage;
            Add(mMessageLabel);

            mOkayButton = new GUIButton();
            mOkayButton.Text = "Okay";
            mOkayButton.ButtonReleased += delegate
            {
                this.Remove(PanelResult.OKAY);
            };
            Add(mOkayButton);

            mCancelButton = new GUIButton();
            mCancelButton.Text = "Cancel";
            mCancelButton.ButtonReleased += delegate
            {
                this.Remove(PanelResult.CANCEL);
            };
            Add(mCancelButton);

            base.Initialize();
        }

        public override void LoadContent()
        {
            font = mParentScreen.Content.Load<SpriteFont>(@"Fonts\Courier New");
            mOkayButton.Font = font;
            mCancelButton.Font = font;

            Vector2 titleSize = font.MeasureString(mMessage);

            Size = new Vector2(Math.Max(titleSize.X, 200), Math.Max(titleSize.Y, 48));
            Vector2 screenSize = new Vector2(mParentScreen.GraphicsDevice.PresentationParameters.BackBufferWidth,
                mParentScreen.GraphicsDevice.PresentationParameters.BackBufferHeight);
            Position = (screenSize - Size) / 2;

            mMessageLabel.Size = new Vector2(200, 24);
            mMessageLabel.Position = Position;

            mOkayButton.Size = new Vector2(100, 24);
            mOkayButton.Position = Position + new Vector2((Size.X / 2) - mOkayButton.Size.X, mMessageLabel.Size.Y);

            mCancelButton.Size = new Vector2(100, 24);
            mCancelButton.Position = Position + new Vector2(Size.X / 2, mMessageLabel.Size.Y);

            base.LoadContent();
        }
    }
}