/******************************************************************************
 * Spine Runtimes Software License
 * Version 2
 * 
 * Copyright (c) 2013, Esoteric Software
 * All rights reserved.
 * 
 * You are granted a perpetual, non-exclusive, non-sublicensable and
 * non-transferable license to install, execute and perform the Spine Runtimes
 * Software (the "Software") solely for internal use. Without the written
 * permission of Esoteric Software, you may not (a) modify, translate, adapt or
 * otherwise create derivative works, improvements of the Software or develop
 * new applications using the Software or (b) remove, delete, alter or obscure
 * any trademarks or any copyright, trademark, patent or other intellectual
 * property or proprietary rights notices on or in the Software, including
 * any copy thereof. Redistributions in binary or source form must include
 * this license and terms. THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTARE BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/

using System;
using System.IO;
using System.Collections.Generic;
using UnityEngine;
using Spine;

/** Extends SkeletonComponent to apply an animation. */
[ExecuteInEditMode, RequireComponent(typeof(MeshFilter), typeof(MeshRenderer))]
[AddComponentMenu("Spine/SkeletonAnimation")]
public class SkeletonAnimation : SkeletonComponent {
	public bool loop;
	public Spine.AnimationState state;

	public delegate void UpdateBonesDelegate(SkeletonAnimation skeleton);
	public UpdateBonesDelegate UpdateBones;

	public String _animationName;
	public String animationName {
		get {
			TrackEntry entry = state.GetCurrent(0);
			return entry == null ? null : entry.Animation.Name;
		}
		set {
			if (_animationName == value) return;
			_animationName = value;
			if (value == null || value.Length == 0)
				state.ClearTrack(0);
			else
				state.SetAnimation(0, value, loop);
		}
	}

	override public void Initialize () {
		if (Initialized) return;

		base.Initialize();

		state = new Spine.AnimationState(skeletonDataAsset.GetAnimationStateData());
		if (_animationName != null && _animationName.Length > 0) state.SetAnimation(0, _animationName, loop);
	}

	override public void UpdateSkeleton (float deltaTime) {
		// Apply the animation.
		state.Update(deltaTime * timeScale);
		state.Apply(skeleton);

		if (UpdateBones != null) UpdateBones(this);

		// Call overridden method to call skeleton Update and UpdateWorldTransform.
		base.UpdateSkeleton(deltaTime);
	}
}