using System;
using System.Numerics;
using Dalamud.Game.ClientState.Conditions;
using Dalamud.Game.ClientState.Objects.Types;
using Dalamud.Plugin.Services;
using Microsoft.Extensions.Logging;
using Questionable.Controller.GameUi;
using Questionable.Functions;

namespace Questionable.Controller.Steps.Shared;

internal static class TaxiInteract
{
	internal sealed record Task(uint NpcDataId, uint DestStandRowId, string DestPlaceName, ushort SourceTerritoryId, ushort DestTerritoryId) : ITask
	{
		public bool ShouldRedoOnInterrupt()
		{
			return true;
		}

		public override string ToString()
		{
			return $"TaxiInteract({NpcDataId}, dest={DestPlaceName}, {SourceTerritoryId}->{DestTerritoryId})";
		}
	}

	internal sealed class DoTaxiInteract(GameFunctions gameFunctions, InteractionUiController interactionUiController, ICondition condition, IClientState clientState, IObjectTable objectTable, ILogger<DoTaxiInteract> logger) : TaskExecutor<Task>(), IConditionChangeAware, ITaskExecutor
	{
		private enum ETaxiPhase
		{
			None,
			Unmounting,
			Interacting,
			Riding
		}

		private ETaxiPhase _phase;

		private Vector3 _startPosition;

		private long _interactingStartedAt;

		private bool _wasRiding;

		protected override bool Start()
		{
			_phase = ETaxiPhase.None;
			_wasRiding = false;
			_startPosition = objectTable.LocalPlayer?.Position ?? Vector3.Zero;
			interactionUiController.SmartNavTaxiDestPlaceName = base.Task.DestPlaceName;
			IGameObject gameObject = gameFunctions.FindObjectByDataId(base.Task.NpcDataId);
			if (gameObject == null)
			{
				logger.LogDebug("TaxiInteract: NPC with DataId {DataId} not found yet, waiting", base.Task.NpcDataId);
				return true;
			}
			if (condition[ConditionFlag.Mounted])
			{
				logger.LogDebug("TaxiInteract: Unmounting before taxi interaction");
				gameFunctions.Unmount();
				_phase = ETaxiPhase.Unmounting;
				return true;
			}
			if (gameFunctions.InteractWith(gameObject))
			{
				logger.LogDebug("TaxiInteract: Interacting with NPC {DataId} for taxi to {Dest}", base.Task.NpcDataId, base.Task.DestPlaceName);
				_phase = ETaxiPhase.Interacting;
				_interactingStartedAt = Environment.TickCount64;
			}
			return true;
		}

		public override ETaskResult Update()
		{
			switch (_phase)
			{
			case ETaxiPhase.Unmounting:
			{
				if (condition[ConditionFlag.Mounted])
				{
					return ETaskResult.StillRunning;
				}
				IGameObject gameObject2 = gameFunctions.FindObjectByDataId(base.Task.NpcDataId);
				if (gameObject2 == null)
				{
					logger.LogDebug("TaxiInteract: NPC not found after unmount, waiting");
					_phase = ETaxiPhase.None;
					return ETaskResult.StillRunning;
				}
				if (gameFunctions.InteractWith(gameObject2))
				{
					logger.LogDebug("TaxiInteract: Interacting with NPC {DataId} after unmount", base.Task.NpcDataId);
					_phase = ETaxiPhase.Interacting;
					_interactingStartedAt = Environment.TickCount64;
				}
				return ETaskResult.StillRunning;
			}
			case ETaxiPhase.Interacting:
				if (condition[ConditionFlag.Mounted] && (condition[ConditionFlag.Occupied] || condition[ConditionFlag.OccupiedInEvent]))
				{
					logger.LogDebug("TaxiInteract: Taxi ride started");
					_wasRiding = true;
					_phase = ETaxiPhase.Riding;
					return ETaskResult.StillRunning;
				}
				if (Environment.TickCount64 - _interactingStartedAt > 30000)
				{
					logger.LogWarning("TaxiInteract: Timed out waiting for taxi ride to start, retrying step");
					ClearContext();
					return ETaskResult.RetryStep;
				}
				return ETaskResult.StillRunning;
			case ETaxiPhase.Riding:
				if (clientState.TerritoryType != base.Task.SourceTerritoryId)
				{
					logger.LogDebug("TaxiInteract: Territory changed to {Territory}, taxi ride complete", clientState.TerritoryType);
					ClearContext();
					return ETaskResult.TaskComplete;
				}
				if ((!condition[ConditionFlag.Mounted] || (!condition[ConditionFlag.Occupied] && !condition[ConditionFlag.OccupiedInEvent])) && _wasRiding)
				{
					logger.LogDebug("TaxiInteract: Taxi ride ended (dismounted)");
					ClearContext();
					return ETaskResult.TaskComplete;
				}
				return ETaskResult.StillRunning;
			case ETaxiPhase.None:
			{
				IGameObject gameObject = gameFunctions.FindObjectByDataId(base.Task.NpcDataId);
				if (gameObject == null)
				{
					return ETaskResult.StillRunning;
				}
				_startPosition = objectTable.LocalPlayer?.Position ?? _startPosition;
				if (condition[ConditionFlag.Mounted])
				{
					gameFunctions.Unmount();
					_phase = ETaxiPhase.Unmounting;
					return ETaskResult.StillRunning;
				}
				if (gameFunctions.InteractWith(gameObject))
				{
					logger.LogDebug("TaxiInteract: Interacting with NPC {DataId}", base.Task.NpcDataId);
					_phase = ETaxiPhase.Interacting;
					_interactingStartedAt = Environment.TickCount64;
				}
				return ETaskResult.StillRunning;
			}
			default:
				return ETaskResult.StillRunning;
			}
		}

		public void OnConditionChange(ConditionFlag flag, bool value)
		{
			bool flag2 = _phase == ETaxiPhase.Interacting;
			if (flag2)
			{
				bool flag3 = (uint)(flag - 31) <= 1u;
				flag2 = flag3;
			}
			if (flag2 && value)
			{
				logger.LogDebug("TaxiInteract: Interaction confirmed via condition flag");
			}
		}

		public override bool ShouldInterruptOnDamage()
		{
			return false;
		}

		private void ClearContext()
		{
			interactionUiController.SmartNavTaxiDestPlaceName = null;
		}
	}
}