using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using Dalamud.Plugin.Services;
using Questionable.Controller.Steps;
using Questionable.Controller.Steps.Common;
using Questionable.Controller.Steps.Movement;
using Questionable.Controller.Steps.Shared;
using Questionable.Data;
using Questionable.Model.Questing;
using SmartNav;

namespace Questionable.Navigation;

internal sealed class SmartNavTaskMapper(IClientState clientState, TerritoryData territoryData)
{
	public IEnumerable<ITask> MapInstructions(IReadOnlyList<NavInstruction> instructions, QuestStep? step = null)
	{
		for (int i = 0; i < instructions.Count; i++)
		{
			foreach (ITask item in Map(instructions[i], NextTravelInstruction(instructions, i), step))
			{
				yield return item;
			}
		}
	}

	private static NavInstruction? NextTravelInstruction(IReadOnlyList<NavInstruction> instructions, int i)
	{
		for (int j = i + 1; j < instructions.Count; j++)
		{
			NavInstruction navInstruction = instructions[j];
			if ((!(navInstruction is NavInstruction.Land) && !(navInstruction is NavInstruction.Unmount) && !(navInstruction is NavInstruction.WaitForTerritory) && !(navInstruction is NavInstruction.WaitForNavmesh)) || 1 == 0)
			{
				return instructions[j];
			}
		}
		return null;
	}

	private IEnumerable<ITask> Map(NavInstruction instruction, NavInstruction? nextTravel, QuestStep? step)
	{
		NavInstruction.Teleport teleport = instruction as NavInstruction.Teleport;
		if ((object)teleport == null)
		{
			if (!(instruction is NavInstruction.AethernetHop aethernetHop))
			{
				if (!(instruction is NavInstruction.Move move))
				{
					if (!(instruction is NavInstruction.Land))
					{
						if (!(instruction is NavInstruction.Unmount))
						{
							NavInstruction.WaitForTerritory waitForTerritory = instruction as NavInstruction.WaitForTerritory;
							if ((object)waitForTerritory == null)
							{
								if (!(instruction is NavInstruction.WaitForNavmesh))
								{
									if (!(instruction is NavInstruction.InteractWarp interactWarp))
									{
										if (!(instruction is NavInstruction.UseTeleportTicket useTeleportTicket))
										{
											if (!(instruction is NavInstruction.SubRegionTransport subRegionTransport))
											{
												throw new InvalidOperationException($"Unmapped NavInstruction: {instruction}");
											}
											yield return new SubRegionTransport.Task(subRegionTransport.From, subRegionTransport.To, subRegionTransport.Territory);
										}
										else
										{
											yield return new TicketTeleport.Task(useTeleportTicket.ItemId, useTeleportTicket.Territory);
										}
									}
									else
									{
										yield return new WarpInteract.Task(interactWarp.NpcDataId, interactWarp.WarpRowId, interactWarp.FromTerritory, interactWarp.ToTerritory);
									}
								}
								else
								{
									yield return new WaitNavmesh.Task();
								}
							}
							else
							{
								yield return new WaitCondition.Task(() => waitForTerritory.Acceptable.Contains(clientState.TerritoryType), waitForTerritory.Description);
							}
						}
						else
						{
							yield return new Mount.UnmountTask();
						}
					}
					else
					{
						yield return new LandTask();
					}
				}
				else if (move.IsFinal && step != null)
				{
					Vector3 destination = step.Position ?? move.Position;
					yield return new MoveTask(step, destination)with
					{
						Fly = (move.Fly || step.Fly == true),
						Land = (move.Fly || step.Land == true),
						SmartNavRouted = true,
						RouteTargetNodeId = move.TargetNodeId,
						RouteApproachNodeId = move.ApproachNodeId
					};
					if (step != null)
					{
						bool? fly = step.Fly;
						if (fly.HasValue && fly == true && (step.Land ?? false))
						{
							yield return new LandTask();
						}
					}
				}
				else
				{
					NavInstruction.Move move2 = move;
					ushort territory = move2.Territory;
					Vector3 position = move2.Position;
					bool? mount = move2.Mount;
					float? stopDistance = move2.StopDistance;
					uint? dataId = move2.DataId;
					bool disableNavmesh = move2.DisableNavmesh;
					bool fly2 = move2.Fly;
					bool landAtTarget = move2.LandAtTarget;
					bool allowZoneTransition = move2.AllowZoneTransition;
					string targetNodeId = move2.TargetNodeId;
					string approachNodeId = move2.ApproachNodeId;
					yield return new MoveTask(territory, position, mount, MountRequired: false, DismountRequired: false, stopDistance, dataId, disableNavmesh, null, fly2, landAtTarget, IgnoreDistanceToObject: false, RestartNavigation: true, EInteractionType.None, SmartNavRouted: true, allowZoneTransition, targetNodeId, approachNodeId);
				}
			}
			else
			{
				yield return new AethernetRide.Task(aethernetHop.From, aethernetHop.To);
			}
			yield break;
		}
		yield return new AetheryteTeleport.Task(teleport.Target, teleport.ExpectedTerritory);
		if (AetheryteTeleport.MoveAwayFromAetheryteExecutor.AppliesTo(teleport.Target) && (nextTravel as NavInstruction.AethernetHop)?.From != teleport.Target)
		{
			yield return new WaitCondition.Task(() => clientState.TerritoryType == teleport.ExpectedTerritory, "Wait(territory: " + territoryData.GetNameAndId(teleport.ExpectedTerritory) + ")");
			yield return new AetheryteTeleport.MoveAwayFromAetheryte(teleport.Target);
		}
	}
}