/******************************************************************************
 * Spine Runtimes Software License
 * Version 2.1
 * 
 * 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 (typically granted by licensing Spine), 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.Collections.Generic;

namespace SpineRuntime21 {
	public class AnimationStateData {
		internal SkeletonData skeletonData;
		private Dictionary<KeyValuePair<Animation, Animation>, float> animationToMixTime = new Dictionary<KeyValuePair<Animation, Animation>, float>();
		internal float defaultMix;

		public SkeletonData SkeletonData { get { return skeletonData; } }
		public float DefaultMix { get { return defaultMix; } set { defaultMix = value; } }

		public AnimationStateData (SkeletonData skeletonData) {
			this.skeletonData = skeletonData;
		}

		public void SetMix (String fromName, String toName, float duration) {
			Animation from = skeletonData.FindAnimation(fromName);
			if (from == null) throw new ArgumentException("Animation not found: " + fromName);
			Animation to = skeletonData.FindAnimation(toName);
			if (to == null) throw new ArgumentException("Animation not found: " + toName);
			SetMix(from, to, duration);
		}

		public void SetMix (Animation from, Animation to, float duration) {
			if (from == null) throw new ArgumentNullException("from cannot be null.");
			if (to == null) throw new ArgumentNullException("to cannot be null.");
			KeyValuePair<Animation, Animation> key = new KeyValuePair<Animation, Animation>(from, to);
			animationToMixTime.Remove(key);
			animationToMixTime.Add(key, duration);
		}

		public float GetMix (Animation from, Animation to) {
			KeyValuePair<Animation, Animation> key = new KeyValuePair<Animation, Animation>(from, to);
			float duration;
			if (animationToMixTime.TryGetValue(key, out duration)) return duration;
			return defaultMix;
		}
	}
}