using System;
using System.Collections.Generic;
using System.Linq;
using Dalamud.Game.Text;
using Dalamud.Game.Text.SeStringHandling;
using Dalamud.Plugin.Services;
using FFXIVClientStructs.FFXIV.Client.Game;
using LLib.GameData;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Questionable.Controller.Steps.Common;
using Questionable.Controller.Steps.Interactions;
using Questionable.Data;
using Questionable.Model;
using Questionable.Model.Gathering;
using Questionable.Model.Questing;

namespace Questionable.Controller.Steps.Shared;

internal static class Gather
{
	internal sealed class Factory : ITaskFactory
	{
		public IEnumerable<ITask> CreateAllTasks(Quest quest, QuestSequence sequence, QuestStep step)
		{
			if (step.InteractionType != EInteractionType.Gather)
			{
				yield break;
			}
			foreach (GatheredItem item in step.ItemsToGather)
			{
				yield return new DelayedGatheringTask(item, quest, sequence.Sequence);
			}
		}
	}

	internal sealed record DelayedGatheringTask(GatheredItem GatheredItem, Quest Quest, byte Sequence) : ITask
	{
		public override string ToString()
		{
			return $"Gathering(pending for {GatheredItem.ItemId})";
		}
	}

	internal sealed class DelayedGatheringExecutor(GatheringPointRegistry gatheringPointRegistry, TerritoryData territoryData, IClientState clientState, IServiceProvider serviceProvider, ILogger<DelayedGatheringExecutor> logger) : TaskExecutor<DelayedGatheringTask>(), IExtraTaskCreator, ITaskExecutor
	{
		protected override bool Start()
		{
			return true;
		}

		public override ETaskResult Update()
		{
			return ETaskResult.CreateNewTasks;
		}

		public IEnumerable<ITask> CreateExtraTasks()
		{
			EClassJob rowId = (EClassJob)clientState.LocalPlayer.ClassJob.RowId;
			if (!gatheringPointRegistry.TryGetGatheringPointId(base.Task.GatheredItem.ItemId, rowId, out GatheringPointId gatheringPointId))
			{
				throw new TaskException($"No gathering point found for item {base.Task.GatheredItem.ItemId}");
			}
			if (!gatheringPointRegistry.TryGetGatheringPoint(gatheringPointId, out GatheringRoot gatheringRoot))
			{
				throw new TaskException($"No path found for gathering point {gatheringPointId}");
			}
			if (HasRequiredItems(base.Task.GatheredItem))
			{
				yield break;
			}
			switch (rowId)
			{
			case EClassJob.Miner:
				yield return new Questionable.Controller.Steps.Interactions.Action.TriggerStatusIfMissing(EStatus.Prospect, EAction.Prospect);
				break;
			case EClassJob.Botanist:
				yield return new Questionable.Controller.Steps.Interactions.Action.TriggerStatusIfMissing(EStatus.Triangulate, EAction.Triangulate);
				break;
			}
			using (logger.BeginScope("Gathering(inner)"))
			{
				QuestSequence gatheringSequence = new QuestSequence
				{
					Sequence = 0,
					Steps = gatheringRoot.Steps
				};
				foreach (QuestStep step in gatheringSequence.Steps)
				{
					foreach (ITask item in serviceProvider.GetRequiredService<TaskCreator>().CreateTasks(base.Task.Quest, base.Task.Sequence, gatheringSequence, step))
					{
						if (item is WaitAtEnd.NextStep)
						{
							yield return new SkipMarker();
						}
						else
						{
							yield return item;
						}
					}
				}
			}
			ushort territoryId = gatheringRoot.Steps.Last().TerritoryId;
			yield return new WaitCondition.Task(() => clientState.TerritoryType == territoryId, "Wait(territory: " + territoryData.GetNameAndId(territoryId) + ")");
			yield return new WaitNavmesh.Task();
			yield return new GatheringTask(gatheringPointId, base.Task.GatheredItem);
			yield return new WaitAtEnd.WaitDelay();
		}

		private unsafe bool HasRequiredItems(GatheredItem itemToGather)
		{
			InventoryManager* ptr = InventoryManager.Instance();
			if (ptr != null)
			{
				return ptr->GetInventoryItemCount(itemToGather.ItemId, isHq: false, checkEquipped: true, checkArmory: true, (short)itemToGather.Collectability) >= itemToGather.ItemCount;
			}
			return false;
		}

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

	internal sealed record GatheringTask(GatheringPointId gatheringPointId, GatheredItem gatheredItem) : ITask
	{
		public override string ToString()
		{
			if (gatheredItem.Collectability != 0)
			{
				return $"Gather({gatheredItem.ItemCount}x {gatheredItem.ItemId} {SeIconChar.Collectible.ToIconString()} {gatheredItem.Collectability})";
			}
			return $"Gather({gatheredItem.ItemCount}x {gatheredItem.ItemId})";
		}
	}

	internal sealed class StartGathering(GatheringController gatheringController) : TaskExecutor<GatheringTask>(), IToastAware, ITaskExecutor
	{
		protected override bool Start()
		{
			return gatheringController.Start(new GatheringController.GatheringRequest(base.Task.gatheringPointId, base.Task.gatheredItem.ItemId, base.Task.gatheredItem.AlternativeItemId, base.Task.gatheredItem.ItemCount, base.Task.gatheredItem.Collectability));
		}

		public override ETaskResult Update()
		{
			if (gatheringController.Update() == GatheringController.EStatus.Complete)
			{
				return ETaskResult.TaskComplete;
			}
			return ETaskResult.StillRunning;
		}

		public bool OnErrorToast(SeString message)
		{
			bool isHandled = false;
			gatheringController.OnErrorToast(ref message, ref isHandled);
			return isHandled;
		}

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

	internal sealed class SkipMarker : ITask
	{
		public override string ToString()
		{
			return "Gather/SkipMarker";
		}
	}

	internal sealed class DoSkip : TaskExecutor<SkipMarker>
	{
		protected override bool Start()
		{
			return true;
		}

		public override ETaskResult Update()
		{
			return ETaskResult.TaskComplete;
		}

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