using System;
using UnityEngine;

namespace RootMotion.FinalIK
{
	[HelpURL("https://www.youtube.com/watch?v=r5jiZnsDH3M")]
	[AddComponentMenu("Scripts/RootMotion.FinalIK/Interaction System/Interaction Target")]
	public class InteractionTarget : MonoBehaviour
	{
		[Serializable]
		public class Multiplier
		{
			[Tooltip("The curve type (InteractionObject.WeightCurve.Type).")]
			public InteractionObject.WeightCurve.Type curve;

			[Tooltip("Multiplier of the curve's value.")]
			public float multiplier;
		}

		[Tooltip("The type of the FBBIK effector.")]
		public FullBodyBipedEffector effectorType;

		[Tooltip("InteractionObject weight curve multipliers for this effector target.")]
		public Multiplier[] multipliers;

		[Tooltip("The interaction speed multiplier for this effector. This can be used to make interactions faster/slower for specific effectors.")]
		public float interactionSpeedMlp = 1f;

		[Tooltip("The pivot to twist/swing this interaction target about. For symmetric objects that can be interacted with from a certain angular range.")]
		public Transform pivot;

		[Tooltip("The axis of twisting the interaction target (blue line).")]
		public Vector3 twistAxis = Vector3.up;

		[Tooltip("The weight of twisting the interaction target towards the effector bone in the start of the interaction.")]
		public float twistWeight = 1f;

		[Tooltip("The weight of swinging the interaction target towards the effector bone in the start of the interaction. Swing is defined as a 3-DOF rotation around any axis, while twist is only around the twist axis.")]
		public float swingWeight;

		[Tooltip("If true, will twist/swing around the pivot only once at the start of the interaction. If false, will continue rotating throuout the whole interaction.")]
		public bool rotateOnce = true;

		private Quaternion defaultLocalRotation;

		private Transform lastPivot;

		[ContextMenu("User Manual")]
		private void OpenUserManual()
		{
			Application.OpenURL("http://www.root-motion.com/finalikdox/html/page10.html");
		}

		[ContextMenu("Scrpt Reference")]
		private void OpenScriptReference()
		{
			Application.OpenURL("http://www.root-motion.com/finalikdox/html/class_root_motion_1_1_final_i_k_1_1_interaction_target.html");
		}

		[ContextMenu("TUTORIAL VIDEO (PART 1: BASICS)")]
		private void OpenTutorial1()
		{
			Application.OpenURL("https://www.youtube.com/watch?v=r5jiZnsDH3M");
		}

		[ContextMenu("TUTORIAL VIDEO (PART 2: PICKING UP...)")]
		private void OpenTutorial2()
		{
			Application.OpenURL("https://www.youtube.com/watch?v=eP9-zycoHLk");
		}

		[ContextMenu("TUTORIAL VIDEO (PART 3: ANIMATION)")]
		private void OpenTutorial3()
		{
			Application.OpenURL("https://www.youtube.com/watch?v=sQfB2RcT1T4&index=14&list=PLVxSIA1OaTOu8Nos3CalXbJ2DrKnntMv6");
		}

		[ContextMenu("TUTORIAL VIDEO (PART 4: TRIGGERS)")]
		private void OpenTutorial4()
		{
			Application.OpenURL("https://www.youtube.com/watch?v=-TDZpNjt2mk&index=15&list=PLVxSIA1OaTOu8Nos3CalXbJ2DrKnntMv6");
		}

		[ContextMenu("Support Group")]
		private void SupportGroup()
		{
			Application.OpenURL("https://groups.google.com/forum/#!forum/final-ik");
		}

		[ContextMenu("Asset Store Thread")]
		private void ASThread()
		{
			Application.OpenURL("http://forum.unity3d.com/threads/final-ik-full-body-ik-aim-look-at-fabrik-ccd-ik-1-0-released.222685/");
		}

		public float GetValue(InteractionObject.WeightCurve.Type curveType)
		{
			for (int i = 0; i < multipliers.Length; i++)
			{
				if (multipliers[i].curve == curveType)
				{
					return multipliers[i].multiplier;
				}
			}
			return 1f;
		}

		public void ResetRotation()
		{
			if (pivot != null)
			{
				pivot.localRotation = defaultLocalRotation;
			}
		}

		public void RotateTo(Vector3 position)
		{
			if (!(pivot == null))
			{
				if (pivot != lastPivot)
				{
					defaultLocalRotation = pivot.localRotation;
					lastPivot = pivot;
				}
				pivot.localRotation = defaultLocalRotation;
				if (twistWeight > 0f)
				{
					Vector3 tangent = base.transform.position - pivot.position;
					Vector3 vector = pivot.rotation * twistAxis;
					Vector3 normal = vector;
					Vector3.OrthoNormalize(ref normal, ref tangent);
					normal = vector;
					Vector3 tangent2 = position - pivot.position;
					Vector3.OrthoNormalize(ref normal, ref tangent2);
					Quaternion b = QuaTools.FromToAroundAxis(tangent, tangent2, vector);
					pivot.rotation = Quaternion.Lerp(Quaternion.identity, b, twistWeight) * pivot.rotation;
				}
				if (swingWeight > 0f)
				{
					Quaternion b2 = Quaternion.FromToRotation(base.transform.position - pivot.position, position - pivot.position);
					pivot.rotation = Quaternion.Lerp(Quaternion.identity, b2, swingWeight) * pivot.rotation;
				}
			}
		}
	}
}