using Mirror;
using QSB.Player.TransformSync;
using QSB.ShipSync.TransformSync;
using QSB.Syncs.Unsectored.Rigidbodies;
using QSB.Tools.ProbeTool.TransformSync;
using QSB.Utility;
using QSB.WorldSync;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

namespace QSB.TornadoSync.TransformSync
{
	public class OccasionalTransformSync : UnsectoredRigidbodySync
	{
		protected override bool IsReady => WorldObjectManager.AllObjectsReady
			&& CenterOfTheUniverse.s_rigidbodies.IsInRange(_bodyIndex)
			&& CenterOfTheUniverse.s_rigidbodies.IsInRange(_refBodyIndex);
		protected override bool UseInterpolation => false;
		protected override bool OnlyApplyOnDeserialize => true;

		protected override OWRigidbody InitAttachedRigidbody() => CenterOfTheUniverse.s_rigidbodies[_bodyIndex];

		private int _bodyIndex = -1;
		private int _refBodyIndex = -1;
		private Sector[] _sectors;
		private OWRigidbody[] _childBodies;

		public void InitBodyIndexes(OWRigidbody body, OWRigidbody refBody)
		{
			_bodyIndex = CenterOfTheUniverse.s_rigidbodies.IndexOf(body);
			_refBodyIndex = CenterOfTheUniverse.s_rigidbodies.IndexOf(refBody);
		}

		protected override float SendInterval => 20;
		protected override bool UseReliableRpc => true;

		protected override void Init()
		{
			base.Init();
			SetReferenceTransform(CenterOfTheUniverse.s_rigidbodies[_refBodyIndex].transform);

			_sectors = SectorManager.s_sectors
				.Where(x => x._attachedOWRigidbody == AttachedRigidbody).ToArray();
			_childBodies = CenterOfTheUniverse.s_rigidbodies
				.Where(x => x._origParentBody == AttachedRigidbody)
				.ToArray();
		}

		protected override void Serialize(NetworkWriter writer, bool initialState)
		{
			base.Serialize(writer, initialState);

			if (initialState)
			{
				writer.Write(_bodyIndex);
				writer.Write(_refBodyIndex);
			}
		}

		protected override void Deserialize(NetworkReader reader, bool initialState)
		{
			base.Deserialize(reader, initialState);

			if (initialState)
			{
				_bodyIndex = reader.ReadInt();
				_refBodyIndex = reader.ReadInt();
			}
		}

		protected override void ApplyToAttached()
		{
			if (_sectors.Contains(PlayerTransformSync.LocalInstance?.ReferenceSector?.AttachedObject))
			{
				QueueMove(Locator._playerBody);
			}

			if (_sectors.Contains(ShipTransformSync.LocalInstance?.ReferenceSector?.AttachedObject))
			{
				QueueMove(Locator._shipBody);
			}

			if (_sectors.Contains(PlayerProbeSync.LocalInstance?.ReferenceSector?.AttachedObject))
			{
				QueueMove(Locator._probe._owRigidbody);
			}

			foreach (var child in _childBodies)
			{
				QueueMove(child);
			}

			var pos = ReferenceTransform.FromRelPos(transform.position);
			AttachedRigidbody.SetPosition(pos);
			AttachedRigidbody.SetRotation(ReferenceTransform.FromRelRot(transform.rotation));
			AttachedRigidbody.SetVelocity(ReferenceTransform.GetAttachedOWRigidbody().FromRelVel(_relativeVelocity, pos));
			AttachedRigidbody.SetAngularVelocity(ReferenceTransform.GetAttachedOWRigidbody().FromRelAngVel(_relativeAngularVelocity));

			Move();
		}

		private readonly List<MoveData> _toMove = new();

		private struct MoveData
		{
			public OWRigidbody Child;
			public Vector3 RelPos;
			public Quaternion RelRot;
			public Vector3 RelVel;
			public Vector3 RelAngVel;
		}

		private void QueueMove(OWRigidbody child)
		{
			if (!child)
			{
				return; // wtf
			}

			if (child.transform.parent != null)
			{
				// it's parented to AttachedObject or one of its children
				return;
			}

			var pos = child.GetPosition();
			_toMove.Add(new MoveData
			{
				Child = child,
				RelPos = AttachedRigidbody.transform.ToRelPos(pos),
				RelRot = AttachedRigidbody.transform.ToRelRot(child.GetRotation()),
				RelVel = AttachedRigidbody.ToRelVel(child.GetVelocity(), pos),
				RelAngVel = AttachedRigidbody.ToRelAngVel(child.GetAngularVelocity())
			});
		}

		private void Move()
		{
			foreach (var data in _toMove)
			{
				var pos = AttachedRigidbody.transform.FromRelPos(data.RelPos);
				data.Child.SetPosition(pos);
				data.Child.SetRotation(AttachedRigidbody.transform.FromRelRot(data.RelRot));
				data.Child.SetVelocity(AttachedRigidbody.FromRelVel(data.RelVel, pos));
				data.Child.SetAngularVelocity(AttachedRigidbody.FromRelAngVel(data.RelAngVel));
			}

			_toMove.Clear();
		}
	}
}