using System;
using Dalamud.Plugin.Services;
using LLib.Gear;
using Microsoft.Extensions.Logging;
using Questionable.Data;
using Questionable.Functions;

namespace Questionable.Controller.Steps.Common;

internal static class RepairGear
{
	internal sealed record SelfRepairTask : ITask
	{
		public override string ToString()
		{
			return "SelfRepair";
		}
	}

	internal sealed record MenderRepairTask(MenderNpc Npc) : ITask
	{
		public override string ToString()
		{
			return $"MenderRepair({Npc.DataId})";
		}
	}

	internal enum EState
	{
		Interacting,
		SelectingMenu,
		OpeningWindow,
		WaitingForAddon,
		FiringRepair,
		Confirming,
		Settling,
		Closing,
		WaitingForClose
	}

	internal abstract class RepairExecutorBase<T>(IGameGui gameGui, ILogger logger) : TaskExecutor<T>(), IStoppableTaskExecutor, ITaskExecutor where T : class, ITask
	{
		private const long StateTimeoutMs = 5000L;

		private const long SettleMs = 1000L;

		private const long PollIntervalMs = 250L;

		private const int MaxAttempts = 3;

		private EState _state;

		private long _stateDeadline;

		private long _nextPollAt;

		private int? _conditionBefore;

		private int _attempt;

		protected IGameGui GameGui { get; } = gameGui;

		protected ILogger Logger { get; } = logger;

		protected abstract EState InitialState { get; }

		protected abstract bool UpdateCustomState(EState state);

		protected sealed override bool Start()
		{
			_conditionBefore = GearConditionHelper.GetLowestConditionPercent();
			_attempt = 1;
			EnterState(InitialState);
			_nextPollAt = 0L;
			return true;
		}

		public sealed override ETaskResult Update()
		{
			long tickCount = Environment.TickCount64;
			if (tickCount < _nextPollAt)
			{
				return ETaskResult.StillRunning;
			}
			_nextPollAt = tickCount + 250;
			if (tickCount > _stateDeadline)
			{
				if (_state != EState.Settling)
				{
					Logger.LogWarning("Repair timed out in state {State} ({Diagnostic}), giving up", _state, RepairActions.DescribeRepairAddon(GameGui));
					RepairActions.TryCloseRepairWindow(GameGui);
					return Finish();
				}
				EnterState(EState.Closing);
			}
			switch (_state)
			{
			case EState.OpeningWindow:
				if (RepairActions.TryOpenRepairWindow())
				{
					EnterState(EState.WaitingForAddon);
				}
				break;
			case EState.WaitingForAddon:
				if (RepairActions.IsRepairAddonReady(GameGui))
				{
					EnterState(EState.FiringRepair);
				}
				break;
			case EState.FiringRepair:
				if (RepairActions.TryRepairAll(GameGui))
				{
					EnterState(EState.Confirming);
				}
				break;
			case EState.Confirming:
				if (RepairActions.TryConfirmDialog(GameGui))
				{
					EnterState(EState.Settling);
				}
				else if (HasConditionImproved())
				{
					EnterState(EState.Settling);
				}
				else
				{
					RepairActions.TryRepairAll(GameGui);
				}
				break;
			case EState.Closing:
				if (RepairActions.TryCloseRepairWindow(GameGui))
				{
					EnterState(EState.WaitingForClose);
				}
				break;
			case EState.WaitingForClose:
				if (!RepairActions.IsRepairAddonReady(GameGui))
				{
					return Finish();
				}
				break;
			default:
				if (!UpdateCustomState(_state))
				{
					throw new TaskException($"Unhandled repair state {_state}");
				}
				break;
			case EState.Settling:
				break;
			}
			return ETaskResult.StillRunning;
		}

		protected void EnterState(EState state)
		{
			_state = state;
			_stateDeadline = Environment.TickCount64 + ((state == EState.Settling) ? 1000 : 5000);
		}

		private bool HasConditionImproved()
		{
			int? conditionBefore = _conditionBefore;
			if (conditionBefore.HasValue)
			{
				int valueOrDefault = conditionBefore.GetValueOrDefault();
				conditionBefore = GearConditionHelper.GetLowestConditionPercent();
				if (conditionBefore.HasValue)
				{
					int valueOrDefault2 = conditionBefore.GetValueOrDefault();
					return valueOrDefault2 > valueOrDefault;
				}
			}
			return false;
		}

		private ETaskResult Finish()
		{
			int? lowestConditionPercent = GearConditionHelper.GetLowestConditionPercent();
			if (HasConditionImproved())
			{
				Logger.LogInformation("Repair complete, lowest condition {Before}% -> {After}%", _conditionBefore, lowestConditionPercent);
				return ETaskResult.TaskComplete;
			}
			if (_attempt < 3)
			{
				_attempt++;
				Logger.LogWarning("Repair pass ended without improving condition (still {After}%), retrying ({Attempt}/{Max})", lowestConditionPercent, _attempt, 3);
				RepairActions.TryCloseRepairWindow(GameGui);
				EnterState(InitialState);
				return ETaskResult.StillRunning;
			}
			Logger.LogWarning("Repair finished without improving condition (still {After}%)", lowestConditionPercent);
			return ETaskResult.TaskComplete;
		}

		public void StopNow()
		{
			RepairActions.TryCloseRepairWindow(GameGui);
		}
	}

	internal sealed class SelfRepairExecutor : RepairExecutorBase<SelfRepairTask>
	{
		protected override EState InitialState => EState.OpeningWindow;

		public SelfRepairExecutor(IGameGui gameGui, ILogger<SelfRepairExecutor> logger)
			: base(gameGui, (ILogger)logger)
		{
		}

		protected override bool UpdateCustomState(EState state)
		{
			return false;
		}

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

	internal sealed class MenderRepairExecutor : RepairExecutorBase<MenderRepairTask>
	{
		protected override EState InitialState => EState.Interacting;

		public MenderRepairExecutor(IGameGui gameGui, GameFunctions gameFunctions, IDataManager dataManager, ILogger<MenderRepairExecutor> logger)
		{
			_003CgameFunctions_003EP = gameFunctions;
			_003CdataManager_003EP = dataManager;
			base._002Ector(gameGui, (ILogger)logger);
		}

		protected override bool UpdateCustomState(EState state)
		{
			switch (state)
			{
			case EState.Interacting:
				if (_003CgameFunctions_003EP.InteractWith(base.Task.Npc.DataId))
				{
					EnterState(EState.SelectingMenu);
				}
				return true;
			case EState.SelectingMenu:
			{
				if (RepairActions.IsRepairAddonReady(base.GameGui))
				{
					EnterState(EState.FiringRepair);
					return true;
				}
				int? num = RepairActions.FindRepairIndex(_003CdataManager_003EP, base.Task.Npc.DataId);
				if (!num.HasValue)
				{
					base.Logger.LogWarning("NPC {DataId} has no repair menu entry", base.Task.Npc.DataId);
					EnterState(EState.Closing);
					return true;
				}
				if (RepairActions.TrySelectRepairFromMenu(base.GameGui, num.Value))
				{
					EnterState(EState.WaitingForAddon);
				}
				return true;
			}
			default:
				return false;
			}
		}

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