using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using Questionable.Controller.Steps.Interactions;

namespace Questionable.Controller.Steps;

internal sealed class TaskQueue
{
	private readonly List<ITask> _completedTasks = new List<ITask>();

	private readonly List<ITask> _tasks = new List<ITask>();

	private int _levelingTaskCount;

	public ITaskExecutor? CurrentTaskExecutor { get; set; }

	public IEnumerable<ITask> RemainingTasks => _tasks;

	public bool AllTasksComplete
	{
		get
		{
			int num = ((CurrentTaskExecutor != null) ? (-477523234) : (-477523233));
			while (true)
			{
				int num2 = num;
				int num3 = -477523234;
				int num4 = num2;
				int num5 = num4 + num3;
				int num6 = num4 & num3;
				switch (num5 - (num6 + num6))
				{
				case 2:
					goto IL_0048;
				case 1:
					return _tasks.Count == 0;
				case 0:
					return false;
				}
				continue;
				IL_0048:
				num = -477523233;
			}
		}
	}

	public bool HasLevelingTasks => _levelingTaskCount > 0;

	public void Enqueue(ITask task)
	{
		_tasks.Add(task);
		int num = ((!IsLevelingTask(task)) ? 171339134 : 171339133);
		while (true)
		{
			int num2 = num;
			int num3 = 171339135;
			int num4 = num2;
			switch ((num4 | num3) - (num4 & num3))
			{
			case 1:
				return;
			case 2:
			{
				int levelingTaskCount = _levelingTaskCount;
				num3 = 1;
				num4 = levelingTaskCount;
				_levelingTaskCount = (num4 | num3) + (num4 & num3);
				num = 171339134;
				break;
			}
			case 0:
				num = 171339133;
				break;
			}
		}
	}

	public void EnqueueAll(IEnumerable<ITask> tasks)
	{
		_tasks.InsertRange(0, tasks);
		_levelingTaskCount = _tasks.Count(IsLevelingTask);
	}

	public bool TryDequeue([NotNullWhen(true)] out ITask? task)
	{
		task = _tasks.FirstOrDefault();
		int num = ((task != null) ? (-2044560893) : (-2044560894));
		while (true)
		{
			int num2 = num;
			int num3 = -2044560889;
			int num4 = num2;
			int num5 = num4 + num3;
			int num6 = num4 & num3;
			switch (num5 - (num6 + num6))
			{
			case 2:
				num = -2044560894;
				break;
			case 1:
			{
				int levelingTaskCount = _levelingTaskCount;
				num3 = 1;
				num4 = levelingTaskCount;
				_levelingTaskCount = ~(~num4 + num3);
				num = -2044560895;
				break;
			}
			case 5:
				return false;
			case 3:
				_completedTasks.Add(task);
				num = -2044560889;
				break;
			case 0:
				_tasks.RemoveAt(0);
				num = ((!IsLevelingTask(task)) ? (-2044560895) : (-2044560890));
				break;
			case 4:
				num = ((!task.ShouldRedoOnInterrupt()) ? (-2044560889) : (-2044560892));
				break;
			case 6:
				return true;
			}
		}
	}

	public bool TryPeek([NotNullWhen(true)] out ITask? task)
	{
		task = _tasks.FirstOrDefault();
		return task != null;
	}

	public void Reset()
	{
		_tasks.Clear();
		_completedTasks.Clear();
		CurrentTaskExecutor = null;
		_levelingTaskCount = 0;
	}

	public void InterruptWith(List<ITask> interruptionTasks)
	{
		List<ITask> list = new List<ITask>();
		list.AddRange(interruptionTasks);
		list.AddRange(_completedTasks.Where((ITask x) => x != CurrentTaskExecutor?.CurrentTask).ToList());
		list.Add(CurrentTaskExecutor?.CurrentTask);
		list.AddRange(_tasks);
		List<ITask> source = list;
		Reset();
		_tasks.AddRange(source.Where((ITask x) => x != null).Cast<ITask>());
		_levelingTaskCount = _tasks.Count(IsLevelingTask);
	}

	private static bool IsLevelingTask(ITask task)
	{
		int num = ((task is Duty.StartLevelingModeTask) ? (-425833563) : (-425833568));
		bool result = default(bool);
		while (true)
		{
			int num2 = num;
			int num3 = -425833564;
			int num4 = num2;
			switch ((num4 | num3) - (num4 & num3))
			{
			case 1:
				result = true;
				num = -425833562;
				break;
			case 2:
				return result;
			case 3:
				result = false;
				num = -425833562;
				break;
			case 0:
				num = -425833568;
				break;
			case 4:
				num = ((!(task is Duty.WaitLevelingModeTask)) ? (-425833561) : (-425833563));
				break;
			}
		}
	}
}