using System;
using System.Numerics;

namespace LLib.Movement.Unstuck;

public sealed class StallDetector(StallDetectorOptions options)
{
	private bool _hasAnchor;

	private long _anchorMs;

	private Vector3 _anchorPosition;

	private DriveMode _anchorMode;

	private bool _anchorUsesProgress;

	private float _referenceBestDistance;

	private float _bestDistance;

	private long _lastDrivenMs;

	private long _cooldownUntilMs;

	public StallVerdict? Observe(in StallSample sample)
	{
		int num = (sample.Driving ? 860999294 : 860999280);
		bool flag = default(bool);
		while (true)
		{
			int num2 = num;
			int num3 = 860999289;
			int num4 = num2;
			int num5;
			switch ((num4 | num3) - (num4 & num3))
			{
			case 8:
				num5 = (sample.DistanceToTarget.HasValue ? 1 : 0);
				goto IL_0163;
			case 4:
				num = ((sample.TimestampMs - _lastDrivenMs > options.ContinuityGapMs) ? 860999295 : 860999282);
				break;
			case 1:
				return ObserveProgress(in sample);
			case 11:
				num = ((sample.Mode != _anchorMode) ? 860999295 : 860999289);
				break;
			case 10:
				return ObserveDisplacement(in sample);
			case 7:
				num = ((sample.Mode == DriveMode.Ground) ? 860999292 : 860999281);
				break;
			case 2:
				num = 860999280;
				break;
			case 6:
				Anchor(in sample, flag);
				return null;
			case 9:
				return null;
			case 0:
				num = ((flag == _anchorUsesProgress) ? 860999290 : 860999295);
				break;
			case 5:
				num5 = 0;
				goto IL_0163;
			case 3:
				{
					_lastDrivenMs = sample.TimestampMs;
					num = (flag ? 860999288 : 860999283);
					break;
				}
				IL_0163:
				flag = (byte)num5 != 0;
				num = ((!_hasAnchor) ? 860999295 : 860999293);
				break;
			}
		}
	}

	public void Reset()
	{
		_hasAnchor = false;
		_cooldownUntilMs = 0L;
	}

	private StallVerdict? ObserveProgress(in StallSample sample)
	{
		float value = sample.DistanceToTarget.Value;
		int num = ((!(value < _bestDistance)) ? 755996687 : 755996681);
		long num7 = default(long);
		float num8 = default(float);
		while (true)
		{
			int num2 = num;
			int num3 = 755996685;
			int num4 = num2;
			int num5 = num4 + num3;
			int num6 = num4 & num3;
			switch (num5 - (num6 + num6))
			{
			case 0:
				num = 755996681;
				break;
			case 3:
				return null;
			case 6:
				return Trip(in sample, num7, num8);
			case 2:
				num8 = _referenceBestDistance - _bestDistance;
				num = ((!(num8 >= options.ProgressImprovementThreshold)) ? 755996684 : 755996680);
				break;
			case 5:
				_referenceBestDistance = _bestDistance;
				_anchorMs = sample.TimestampMs;
				_anchorPosition = sample.Position;
				return null;
			case 1:
				num7 = sample.TimestampMs - _anchorMs;
				num = ((num7 < options.ProgressWindowMs) ? 755996686 : 755996683);
				break;
			case 4:
				_bestDistance = value;
				num = 755996687;
				break;
			}
		}
	}

	private StallVerdict? ObserveDisplacement(in StallSample sample)
	{
		int num = ((sample.Mode == DriveMode.Ground) ? 508532326 : 508532323);
		long num9 = default(long);
		float num8 = default(float);
		while (true)
		{
			int num2 = num;
			int num3 = 508532327;
			int num4 = num2;
			int num5 = num4 + num3;
			int num6 = num4 & num3;
			float num7;
			switch (num5 - (num6 + num6))
			{
			case 2:
				num9 = sample.TimestampMs - _anchorMs;
				num = ((num9 < options.GroundWindowMs) ? 508532324 : 508532322);
				break;
			case 5:
				return Trip(in sample, num9, num8);
			case 1:
				num7 = DistanceXZ(_anchorPosition, sample.Position);
				goto IL_00ae;
			case 3:
				return null;
			case 0:
				num = 508532323;
				break;
			case 4:
				num7 = Vector3.Distance(_anchorPosition, sample.Position);
				goto IL_00ae;
			case 6:
				{
					_anchorMs = sample.TimestampMs;
					_anchorPosition = sample.Position;
					return null;
				}
				IL_00ae:
				num8 = num7;
				num = ((!(num8 >= options.GroundDistanceThreshold)) ? 508532325 : 508532321);
				break;
			}
		}
	}

	private StallVerdict? Trip(in StallSample sample, long elapsedMs, float measured)
	{
		bool num = sample.TimestampMs < _cooldownUntilMs;
		Anchor(in sample, _anchorUsesProgress);
		int num2 = ((!num) ? (-1156731677) : (-1156731680));
		while (true)
		{
			int num3 = num2;
			int num4 = -1156731679;
			int num5 = num3;
			int num6 = num5 + num4;
			int num7 = num5 & num4;
			switch (num6 - (num7 + num7))
			{
			case 2:
				_cooldownUntilMs = sample.TimestampMs + options.CooldownMs;
				return new StallVerdict(elapsedMs, measured, sample.Mode);
			case 1:
				return null;
			case 0:
				goto IL_0092;
			}
			continue;
			IL_0092:
			num2 = -1156731680;
		}
	}

	private void Anchor(in StallSample sample, bool usesProgress)
	{
		_hasAnchor = true;
		_anchorMs = sample.TimestampMs;
		_anchorPosition = sample.Position;
		_anchorMode = sample.Mode;
		_anchorUsesProgress = usesProgress;
		_lastDrivenMs = sample.TimestampMs;
		_referenceBestDistance = (_bestDistance = sample.DistanceToTarget.GetValueOrDefault());
	}

	private static float DistanceXZ(Vector3 a, Vector3 b)
	{
		float num = a.X - b.X;
		float num2 = a.Z - b.Z;
		return _206A_202D_200C_206C_206C_206B_202D_202E_206B_200B_200B_206F_206F_202B_200D_200F_206A_202C_200C_202A_202D_202C_200B_206F_206F_200F_206F_206B_206E_200D_202C_200C_200D_206F_202A_202D_202D_200B_200D_202C_202E(num * num + num2 * num2);
	}

	static float _206A_202D_200C_206C_206C_206B_202D_202E_206B_200B_200B_206F_206F_202B_200D_200F_206A_202C_200C_202A_202D_202C_200B_206F_206F_200F_206F_206B_206E_200D_202C_200C_200D_206F_202A_202D_202D_200B_200D_202C_202E(float P_0)
	{
		return MathF.Sqrt(P_0);
	}
}