/*
 * Entity.cs
 * Authors:     August Zinsser
 * 
 * Copyright Matthew Belmonte 2007
 */

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Graphics;


namespace tAC_Engine
{
    /// <summary>
    /// An entity that responds to click events
    /// </summary>
    class Button : Entity
    {
        protected bool mLeftClickedLastCycle = false;       // Remember when this button is clicked on
        protected bool mRightClickedLastCycle = false;      // ''
        protected bool mLeftClickedThisCycle = false;       // ''
        protected bool mRightClickedThisCycle = false;      // ''

        public bool IsLeftClicked { get { return mLeftClickedThisCycle; } }
        public bool IsRightClicked { get { return mRightClickedThisCycle; } }
        public bool WasLeftClicked { get { return mLeftClickedLastCycle; } }
        public bool WasRightClicked { get { return mRightClickedLastCycle; } }


        /// <summary>
        /// Creates a new button with the dimensions of the off texture
        /// </summary>
        /// <param name="offTexture">The standard idle texture of the button</param>
        /// <param name="onTexture">The texture to display on mouseover</param>
        public Button(Texture2D offTexture, Texture2D onTexture)
            : base(offTexture)
        {
            mSprite.AddClip("On", onTexture, 1, 0f);
        }


        /// <summary>
        /// Creates a new button with the dimensions of the texture
        /// </summary>
        /// <param name="offTexture">The standard idle texture of the button</param>
        public Button(Texture2D offTexture)
            : base(offTexture)
        {
            mSprite.AddClip("On", offTexture, 1, 0f);
        }


        /// <summary>
        /// Check if the mouse was clicked
        /// </summary>
        public override void Update()
        {
            base.Update();

            MouseState mouse = Mouse.GetState();
            mLeftClickedLastCycle = mLeftClickedThisCycle;
            mRightClickedLastCycle = mRightClickedThisCycle;
            mLeftClickedThisCycle = false;
            mRightClickedThisCycle = false;

            // Check to see if user has clicked this button
            if (this.IsMouseOver())
            {
                mSprite.Play("On");
                if (mouse.LeftButton == ButtonState.Pressed)
                {
                    mLeftClickedThisCycle = true;
                    OnLeftClick();
                }
                if (mouse.RightButton == ButtonState.Pressed)
                {
                    mRightClickedThisCycle = true;
                    OnRightClick();
                }
            }
            else
            {
                mSprite.Play("Default");
            }
        }


        /// <summary>
        /// Specify code to be executed when a mouse click is detected
        /// </summary>
        public virtual void OnLeftClick()
        {
        }


        /// <summary>
        /// Specify code to be executed when a mouse click is detected
        /// </summary>
        public virtual void OnRightClick()
        {
        }
    }
}