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 enum RotationMode
		{
			TwoDOF = 0,
			ThreeDOF = 1
		}

		[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("2 or 3 degrees of freedom to match this InteractionTarget's rotation to the effector bone rotation.")]
		public RotationMode rotationMode;

		[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("The weight of rotating this InteractionTarget to the effector bone in the start of the interaction (and during if 'Rotate Once' is disabled")]
		[Range(0f, 1f)]
		public float threeDOFWeight = 1f;

		[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;

		[Tooltip("Will not set HandPoser's pose target and allows you to use a pose target from a previous interaction if disabled.")]
		public bool usePoser = true;

		[Tooltip("Used only together with UniversalPoser. List of bones must match UniversalPoser's list of bones in both array size and hierarchy.")]
		public Transform[] bones = new Transform[0];

		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(Transform bone)
		{
			if (pivot == null)
			{
				return;
			}
			if (pivot != lastPivot)
			{
				defaultLocalRotation = pivot.localRotation;
				lastPivot = pivot;
			}
			pivot.localRotation = defaultLocalRotation;
			switch (rotationMode)
			{
			case RotationMode.TwoDOF:
				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 = bone.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, bone.position - pivot.position);
					pivot.rotation = Quaternion.Lerp(Quaternion.identity, b2, swingWeight) * pivot.rotation;
				}
				break;
			case RotationMode.ThreeDOF:
				if (!(threeDOFWeight <= 0f))
				{
					Quaternion quaternion = QuaTools.FromToRotation(base.transform.rotation, bone.rotation);
					if (threeDOFWeight >= 1f)
					{
						pivot.rotation = quaternion * pivot.rotation;
					}
					else
					{
						pivot.rotation = Quaternion.Slerp(Quaternion.identity, quaternion, threeDOFWeight) * pivot.rotation;
					}
				}
				break;
			}
		}
	}
}