//---------------------------------------------------------------------------------------------------------------------------------------------------
// <copyright file="Arrows.cs" company="DarkWynter Studios">
//     Copyright (C)2007 DarkWynter Studios.  All rights reserved.
// </copyright>
//---------------------------------------------------------------------------------------------------------------------------------------------------
// {Contact : darkwynter.com for licensing information
//---------------------------------------------------------------------------------------------------------------------------------------------------

namespace DarkWynter.Game.GameObjects
{
    #region Using Statements
    using System;
    using System.Collections.Generic;
    using Microsoft.Xna.Framework;
    using Microsoft.Xna.Framework.Audio;
    using Microsoft.Xna.Framework.Content;
    using Microsoft.Xna.Framework.Graphics;
    using Microsoft.Xna.Framework.Input;
    using Microsoft.Xna.Framework.Storage;
    using System.Xml;
    using DarkWynter.Engine.Globals;
    using DarkWynter.Engine.Physics;
    using DarkWynter.Engine.ObjectLib;
    using DarkWynter.Engine.GameObjects;
    using DarkWynter.Engine.Init;
    using DarkWynter.Stream;
    using DarkWynter.Engine.EventControl;
    using System.Diagnostics;
    #endregion

    /// <summary>
    /// An arrow indicating which node the player is on
    /// </summary>
    public class Arrows : GameObject
    {
        Stopwatch stopWatch = new Stopwatch();
        const int TIMER = 1;
        
        public int arrowID;
        GameObject firstChild;
        GameObject secondChild;

        /// <summary>
        /// Arrow constructor
        /// </summary>
        public Arrows(Load gameObjectLoader)
            : base(gameObjectLoader)
        {
            mass.objectType = Enums_Engine.ObjectType.PORTAL;
            mass.dynamicFrictionCoefficient = 0.0f;
            mass.isMoving = true;
            typeID = "Arrow";
            firstChild = new GameObject();
            secondChild = new GameObject();
        }
        
        /// <summary>
        /// Override and supplament base loading in GameObject.
        /// </summary>
        /// <param name="node">XML node containing load data.</param>
        /// <param name="objectLibrary">ObjectLibrary that arrow belongs to.</param>
        /// <returns>True if it was able to load, else false</returns>
        public override bool Load(ObjectLibrary objectLibrary)
        {
            // Call before user code is executed
            if (!base.Load(objectLibrary))
            {
                return false;
            }

            arrowID = int.Parse(this.name);

            //draw.textureList[0] = Statics_Engine.SystemSettings.content.Load<Texture2D>("Content/_textures/arrow");
          
            
            // Get terrain height at position
            //float yPosition = objectLibrary.terrain.GetTerrainHeight(load.startPosition.X / Statics_Engine.TerrainSettings.terrainScaleFactor,
            //                                                         load.startPosition.Z / Statics_Engine.TerrainSettings.terrainScaleFactor);

           float yPosition = float.Parse(load.node.Attributes["y"].Value) * Statics_Engine.TerrainSettings.terrainScaleFactor;


            // Set position and reference
            Vector3 locpos = new Vector3(load.startPosition.X, yPosition, load.startPosition.Z);
            Vector3 refpos = new Vector3(load.startPosition.X, yPosition, load.startPosition.Z - 1);
            mass.SetPosition(locpos, refpos);

       
            draw.drawMethod = Enums_Stream.DrawMethod.BasicGameObject_Draw;
            draw.technique = "BasicLightingShaderMain";


            mass.scale = new Vector3(mass.scale.X, 20, mass.scale.Z); 
            mass.boundingVolume = new BoundingVolume(new BoundingSphere(mass.currentPosition, 180.0f));

            stopWatch.Start();
            return true;
        }

        /// <summary>
        /// Override and supplement base Update in GameObject.
        /// </summary>
        /// <param name="objectLibrary">ObjectLibrary that portal belongs to.</param>
        public override void Update(ref ObjectLibrary objectLibrary)
        {
            // Call before user code is executed
             //base.Update(ref objectLibrary);
           //mass.Rotate(0.0f, 0.05f);

             //mass.boundingVolume.radius = 40.0f;
             //mass.boundingVolume.UpdateSphere(mass.currentPosition);   
        }

        public override Draw[] DrawM()
        {
            return new Draw[] { firstChild.Draw(), secondChild.Draw() };
        }

        /// <summary>
        /// Override and supplement response to colliding GameObjects
        /// </summary>
        /// <param name="collidedObject">Object that hit the Portal.</param>
        /// <param name="resultantForce">Force that Portal was hit with.</param>
        /// <param name="objectLibrary">ObjectLibrary that portal belongs to.</param>
        /// <returns>True if collidedObject needs to be recycled</returns>
        public override bool ObjectCollisionResponse(GameObject collidedObject, Vector3 resultantForce, ObjectLibrary objectLibrary)
        {
            //HACK This is for the Heap Game - Hardcoded for the moment *****HACK*****
                   
            if (collidedObject is Human && Statics_Engine.levelIndex == 0)
            {
                Human human = collidedObject as Human;
                human.currentArrow = this;
            }

            // DFS Game Code
                if (collidedObject is Human && Statics_Engine.levelIndex != 1)
            {
                Statics_Engine.PlayerSettings.lastSpawnPoint = mass.currentPosition;
                if (GameEventHandler.CurrentGameConditions.lastNodeVisited != 0)
                {
                    // Update Current Game Conditions
                    GameEventHandler.CurrentGameConditions.lastNodeVisited = this.arrowID;
                }
            }

            // DFS Game Code
            if (collidedObject is ThoughtsAI && Statics_Engine.levelIndex == 1)
            {
                if (GameEventHandler.CurrentGameConditions.lastNodeVisited != 0)
                {
                    // Update Current Game Conditions
                    GameEventHandler.CurrentGameConditions.lastNodeVisited = this.arrowID;
                }
            }
            return false;
        }


        /// <summary>
        /// Overrides and supplements response to this object hitting the ground.
        /// </summary>
        /// <param name="terrain">The terrain object which this Portal hit.</param>
        public override void TerrainCollisionResponse(Terrain terrain)
        {
            base.GetObjectHeight(terrain);

            // Add Gravity if terrain and player are touching
            if (heightDifference < 0.0f)
            {
                mass.AddForce(mass.mass * Statics_Engine.GameSettings.accelDueToGravity);
            }
            else if (heightDifference > 0.0f)
            {
                base.TerrainCollisionResponse(terrain);

                if (mass.totalForce.Y > 0.0f)
                {
                    mass.totalForce.Y = 0.0f;
                }

                if (mass.velocity.Y > 0.0f)
                {
                    mass.velocity.Y = 0.0f;
                }

                if (heightDifference < 0.0f)
                {
                    mass.AddForce(mass.mass * Statics_Engine.GameSettings.accelDueToGravity);
                }
                else if (heightDifference > 0.0f)
                {
                    if (mass.totalForce.Y > 0.0f) { mass.totalForce.Y = 0.0f; }
                    if (mass.velocity.Y > 0.0f) { mass.velocity.Y = 0.0f; }

                    // Ground pushing up to negate gravity
                    mass.AddForce(new Vector3(0.0f, heightDifference * terrain.propSurfaceTension, 0.0f) -
                                  (new Vector3(0.0f, mass.totalForce.Y, 0.0f) +
                                  new Vector3(0.0f, mass.velocity.Y * mass.mass / Statics_Engine.SystemSettings.dt, 0.0f)));
                }
            }
        }

        /// <summary>
        /// Override draw for portal
        /// </summary>
        public override Draw Draw()
        {
           

            // Calculate ObjectSpace(Rotation) and WorldSpace(Translation) Transformation Matrix
            draw.matrix = draw.initialTransform *
                Matrix.CreateScale(mass.scale) *
                Matrix.CreateRotationY((float)Math.PI) *
                Matrix.CreateBillboard(this.mass.currentPosition,
                   Statics_Stream.RenderSettings.cameraList[0].cameraPosition,
                   Statics_Stream.RenderSettings.cameraList[0].upVec,
                   Statics_Stream.RenderSettings.cameraList[0].lookAtPosition);

            //Matrix.CreateFromQuaternion(mass.currentRotation) *
            // Matrix.CreateTranslation(mass.currentPosition);

            return draw;
        }


        /// <summary>
        /// Override and supplement base Billboard drawing specific to this Portal.
        /// </summary>
        /// <param name="objectLibrary">ObjectLibrary that portal belongs to.</param>
        /// <param name="gameObjectBillboards">Dynamic list of billboards to be drawn this frame.</param>
        public override void Draw_Billboards(ObjectLibrary objectLibrary, BillboardList gameObjectBillboards)
        {

        }
    }
}