/******************************************************************************
 * Spine Runtimes Software License
 * Version 2.3
 * 
 * Copyright (c) 2013-2015, Esoteric Software
 * All rights reserved.
 * 
 * You are granted a perpetual, non-exclusive, non-sublicensable and
 * non-transferable license to use, install, execute and perform the Spine
 * Runtimes Software (the "Software") and derivative works solely for personal
 * or internal use. Without the written permission of Esoteric Software (see
 * Section 2 of the Spine Software License Agreement), 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 SOFTWARE 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 UnityEngine;
using System.Collections;
using Spine.Unity;

public class RaggedySpineboy : MonoBehaviour {

	public LayerMask groundMask;
	public float restoreDuration = 0.5f;
	public Vector2 launchVelocity = new Vector2(50,100);

	Spine.Unity.Modules.SkeletonRagdoll2D ragdoll;
	Collider2D naturalCollider;

	void Start () {
		
		ragdoll = GetComponent<Spine.Unity.Modules.SkeletonRagdoll2D>();
		naturalCollider = GetComponent<Collider2D>();
	}

	void AddRigidbody () {
		var rb = gameObject.AddComponent<Rigidbody2D>();
		#if UNITY_5_1 || UNITY_5_2 || UNITY_5_3 || UNITY_5_4 || UNITY_5_5
        rb.freezeRotation = true;
		#else
		rb.fixedAngle = true;
		#endif
		naturalCollider.enabled = true;
	}

	void RemoveRigidbody () {
		Destroy(GetComponent<Rigidbody2D>());
		naturalCollider.enabled = false;
	}

	void Update () {
		
	}

	void OnMouseUp () {
		if (naturalCollider.enabled) {
			Launch();
		}
	}

	void Launch () {
		RemoveRigidbody();
		ragdoll.Apply();
		ragdoll.RootRigidbody.velocity = new Vector2(Random.Range(-launchVelocity.x, launchVelocity.x), launchVelocity.y);
		StartCoroutine(WaitUntilStopped());
	}

	IEnumerator Restore () {
		Vector3 estimatedPos = ragdoll.EstimatedSkeletonPosition;
		Vector3 rbPosition = ragdoll.RootRigidbody.position;

		Vector3 skeletonPoint = estimatedPos;
		RaycastHit2D hit = Physics2D.Raycast((Vector2)rbPosition, (Vector2)(estimatedPos - rbPosition), Vector3.Distance(estimatedPos, rbPosition), groundMask);
		if (hit.collider != null)
			skeletonPoint = hit.point;
		

		ragdoll.RootRigidbody.isKinematic = true;
		ragdoll.SetSkeletonPosition(skeletonPoint);

		yield return ragdoll.SmoothMix(0, restoreDuration);
		ragdoll.Remove();

		AddRigidbody();
	}

	IEnumerator WaitUntilStopped () {
		yield return new WaitForSeconds(0.5f);

		float t = 0;
		while (t < 0.5f) {
			if (ragdoll.RootRigidbody.velocity.magnitude > 0.09f)
				t = 0;
			else
				t += Time.deltaTime;

			yield return null;
		}

		StartCoroutine(Restore());
	}
}