using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using Dalamud.Game.ClientState.Conditions;
using Dalamud.Game.ClientState.Objects.SubKinds;
using Dalamud.Plugin.Services;
using FFXIVClientStructs.FFXIV.Client.Game;
using FFXIVClientStructs.FFXIV.Client.Game.Character;
using FFXIVClientStructs.FFXIV.Common.Math;
using Microsoft.Extensions.Logging;
using Questionable.Data;
using Questionable.Functions;

namespace Questionable.Controller.Steps.Common;

internal static class Mount
{
	internal sealed record MountTask : ITask
	{
		public ushort TerritoryId { get; init; }

		public EMountIf MountIf { get; init; }

		public FFXIVClientStructs.FFXIV.Common.Math.Vector3? Position { get; }

		public MountTask(ushort TerritoryId, EMountIf MountIf, FFXIVClientStructs.FFXIV.Common.Math.Vector3? Position = null)
		{
			this.TerritoryId = TerritoryId;
			this.MountIf = MountIf;
			this.Position = ((MountIf == EMountIf.AwayFromPosition) ? new FFXIVClientStructs.FFXIV.Common.Math.Vector3?(Position ?? throw new ArgumentNullException("Position")) : ((FFXIVClientStructs.FFXIV.Common.Math.Vector3?)null));
			base._002Ector();
		}

		public bool ShouldRedoOnInterrupt()
		{
			return true;
		}

		public override string ToString()
		{
			return "Mount";
		}

		[CompilerGenerated]
		public void Deconstruct(out ushort TerritoryId, out EMountIf MountIf, out FFXIVClientStructs.FFXIV.Common.Math.Vector3? Position)
		{
			TerritoryId = this.TerritoryId;
			MountIf = this.MountIf;
			Position = this.Position;
		}
	}

	internal sealed class MountEvaluator(GameFunctions gameFunctions, ICondition condition, TerritoryData territoryData, IClientState clientState, ILogger<MountEvaluator> logger)
	{
		public unsafe MountResult EvaluateMountState(MountTask task, bool dryRun, ref DateTime retryAt)
		{
			if (condition[ConditionFlag.Mounted])
			{
				return MountResult.DontMount;
			}
			LogLevel logLevel = (dryRun ? LogLevel.None : LogLevel.Information);
			if (!territoryData.CanUseMount(task.TerritoryId))
			{
				logger.Log(logLevel, "Can't use mount in current territory {Id}", task.TerritoryId);
				return MountResult.DontMount;
			}
			if (gameFunctions.HasStatusPreventingMount())
			{
				logger.Log(logLevel, "Can't mount due to status preventing sprint or mount");
				return MountResult.DontMount;
			}
			if (task.MountIf == EMountIf.AwayFromPosition)
			{
				float num = System.Numerics.Vector3.Distance((FFXIVClientStructs.FFXIV.Common.Math.Vector3)(clientState.LocalPlayer?.Position ?? ((System.Numerics.Vector3)FFXIVClientStructs.FFXIV.Common.Math.Vector3.Zero)), task.Position.GetValueOrDefault());
				if (task.TerritoryId == clientState.TerritoryType && num < 30f && !Conditions.Instance()->Diving)
				{
					logger.Log(logLevel, "Not using mount, as we're close to the target");
					return MountResult.DontMount;
				}
				logger.Log(logLevel, "Want to use mount if away from destination ({Distance} yalms), trying (in territory {Id})...", num, task.TerritoryId);
			}
			else
			{
				logger.Log(logLevel, "Want to use mount, trying (in territory {Id})...", task.TerritoryId);
			}
			if (!condition[ConditionFlag.InCombat])
			{
				if (dryRun)
				{
					retryAt = DateTime.Now.AddSeconds(0.5);
				}
				return MountResult.Mount;
			}
			return MountResult.WhenOutOfCombat;
		}
	}

	internal sealed class MountExecutor(GameFunctions gameFunctions, ICondition condition, MountEvaluator mountEvaluator, ILogger<MountExecutor> logger) : TaskExecutor<MountTask>()
	{
		private bool _mountTriggered;

		private DateTime _retryAt = DateTime.MinValue;

		protected override bool Start()
		{
			_mountTriggered = false;
			return mountEvaluator.EvaluateMountState(base.Task, dryRun: false, ref _retryAt) == MountResult.Mount;
		}

		public override ETaskResult Update()
		{
			if (_mountTriggered && !condition[ConditionFlag.Mounted] && DateTime.Now > _retryAt)
			{
				logger.LogInformation("Not mounted, retrying...");
				_mountTriggered = false;
				_retryAt = DateTime.MaxValue;
			}
			if (!_mountTriggered)
			{
				if (gameFunctions.HasStatusPreventingMount())
				{
					logger.LogInformation("Can't mount due to status preventing sprint or mount");
					return ETaskResult.TaskComplete;
				}
				base.ProgressContext = InteractionProgressContext.FromActionUse(() => _mountTriggered = gameFunctions.Mount());
				_retryAt = DateTime.Now.AddSeconds(5.0);
				return ETaskResult.StillRunning;
			}
			if (!condition[ConditionFlag.Mounted])
			{
				return ETaskResult.StillRunning;
			}
			return ETaskResult.TaskComplete;
		}

		public override bool ShouldInterruptOnDamage()
		{
			return false;
		}
	}

	internal enum MountResult
	{
		DontMount,
		Mount,
		WhenOutOfCombat
	}

	internal sealed record UnmountTask : ITask
	{
		public bool ShouldRedoOnInterrupt()
		{
			return true;
		}

		public override string ToString()
		{
			return "Unmount";
		}
	}

	internal sealed class UnmountExecutor(ICondition condition, ILogger<UnmountTask> logger, GameFunctions gameFunctions, IClientState clientState) : TaskExecutor<UnmountTask>()
	{
		private bool _unmountTriggered;

		private DateTime _continueAt = DateTime.MinValue;

		protected override bool Start()
		{
			if (!condition[ConditionFlag.Mounted])
			{
				return false;
			}
			logger.LogInformation("Step explicitly wants no mount, trying to unmount...");
			if (condition[ConditionFlag.InFlight])
			{
				gameFunctions.Unmount();
				_continueAt = DateTime.Now.AddSeconds(1.0);
				return true;
			}
			_unmountTriggered = gameFunctions.Unmount();
			_continueAt = DateTime.Now.AddSeconds(1.0);
			return true;
		}

		public override ETaskResult Update()
		{
			if (_continueAt >= DateTime.Now)
			{
				return ETaskResult.StillRunning;
			}
			if (IsUnmounting())
			{
				return ETaskResult.StillRunning;
			}
			if (!_unmountTriggered)
			{
				if (condition[ConditionFlag.InFlight])
				{
					gameFunctions.Unmount();
				}
				else
				{
					_unmountTriggered = gameFunctions.Unmount();
				}
				_continueAt = DateTime.Now.AddSeconds(1.0);
				return ETaskResult.StillRunning;
			}
			if (condition[ConditionFlag.Mounted] && condition[ConditionFlag.InCombat])
			{
				_unmountTriggered = gameFunctions.Unmount();
				_continueAt = DateTime.Now.AddSeconds(1.0);
				return ETaskResult.StillRunning;
			}
			if (!condition[ConditionFlag.Mounted])
			{
				return ETaskResult.TaskComplete;
			}
			return ETaskResult.StillRunning;
		}

		private unsafe bool IsUnmounting()
		{
			IPlayerCharacter localPlayer = clientState.LocalPlayer;
			if (localPlayer != null)
			{
				BattleChara* address = (BattleChara*)localPlayer.Address;
				return (address->Mount.Flags & 1) == 1;
			}
			return false;
		}

		public override bool ShouldInterruptOnDamage()
		{
			return false;
		}
	}

	public enum EMountIf
	{
		Always,
		AwayFromPosition
	}
}