using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using System.Text;
using Dalamud.Bindings.ImGui;
using Dalamud.Interface;
using Dalamud.Interface.Colors;
using Dalamud.Interface.Components;
using Dalamud.Interface.Utility.Raii;
using Dalamud.Plugin;
using Dalamud.Plugin.Services;
using Questionable.Controller;
using Questionable.Functions;
using Questionable.Model;
using Questionable.Model.Questing;
using Questionable.Windows.Utils;

namespace Questionable.Windows.QuestComponents;

internal sealed class ManualPriorityComponent
{
	private readonly QuestController _questController;

	private readonly QuestFunctions _questFunctions;

	private readonly QuestSelector _questSelector;

	private readonly QuestTooltipComponent _questTooltipComponent;

	private readonly UiUtils _uiUtils;

	private readonly IChatGui _chatGui;

	private readonly IDalamudPluginInterface _pluginInterface;

	private ElementId? _draggedItem;

	public ManualPriorityComponent(QuestController questController, QuestFunctions questFunctions, QuestSelector questSelector, QuestTooltipComponent questTooltipComponent, UiUtils uiUtils, IChatGui chatGui, IDalamudPluginInterface pluginInterface)
	{
		ManualPriorityComponent manualPriorityComponent = this;
		_questController = questController;
		_questFunctions = questFunctions;
		_questSelector = questSelector;
		_questTooltipComponent = questTooltipComponent;
		_uiUtils = uiUtils;
		_chatGui = chatGui;
		_pluginInterface = pluginInterface;
		_questSelector.SuggestionPredicate = (Quest quest) => !quest.Info.IsMainScenarioQuest && !questFunctions.IsQuestUnobtainable(quest.Id) && questController.ManualPriorityQuests.All((Quest x) => x.Id != quest.Id);
		_questSelector.DefaultPredicate = (Quest quest) => questFunctions.IsQuestAccepted(quest.Id);
		_questSelector.QuestSelected = delegate(Quest quest)
		{
			manualPriorityComponent._questController.ManualPriorityQuests.Add(quest);
		};
	}

	public void Draw()
	{
		ImGui.TextWrapped("When you have an active Main Scenario Quest, Questionable will prioritise quests in this order:");
		ImGui.BulletText("Priority quests: class quests, A Realm Reborn primals and raids");
		ImGui.BulletText("Supported quests from your Journal's To-Do list (always visible on-screen quests)");
		ImGui.BulletText("Main Scenario Quest (if available and not marked as ignored in your Journal)");
		ImGui.TextWrapped("Without an active Main Scenario Quest, it will always try to pick up the next MSQ first.");
		ImGui.Spacing();
		ImGui.Text("Custom priority quests:");
		_questSelector.DrawSelection();
		ImGui.Spacing();
		if (_questController.ManualPriorityQuests.Count > 0)
		{
			ImGui.Text("Priority queue (drag arrow buttons to reorder):");
		}
		using (ImRaii.IEndObject endObject = ImRaii.Child("ManualPriorityList", new Vector2(-1f, -27f), border: true))
		{
			if (endObject)
			{
				DrawQuestList();
			}
		}
		List<ElementId> list = ParseClipboardItems();
		using (ImRaii.Disabled(list.Count == 0))
		{
			if (ImGuiComponents.IconButtonWithText(FontAwesomeIcon.Download, "Import from Clipboard"))
			{
				ImportFromClipboard(list);
			}
		}
		ImGui.SameLine();
		using (ImRaii.Disabled(_questController.ManualPriorityQuests.Count == 0))
		{
			if (ImGuiComponents.IconButtonWithText(FontAwesomeIcon.Upload, "Export to Clipboard"))
			{
				ExportToClipboard();
			}
			ImGui.SameLine();
			if (ImGuiComponents.IconButtonWithText(FontAwesomeIcon.Check, "Remove finished Quests"))
			{
				_questController.ManualPriorityQuests.RemoveAll((Quest q) => _questFunctions.IsQuestComplete(q.Id));
			}
			ImGui.SameLine();
			using (ImRaii.Disabled(!ImGui.IsKeyDown(ImGuiKey.ModCtrl)))
			{
				if (ImGuiComponents.IconButtonWithText(FontAwesomeIcon.Trash, "Clear All"))
				{
					_questController.ClearQuestPriority();
				}
			}
			if (ImGui.IsItemHovered(ImGuiHoveredFlags.AllowWhenDisabled))
			{
				ImGui.SetTooltip("Hold CTRL to enable this button.");
			}
		}
	}

	private void DrawQuestList()
	{
		List<Quest> manualPriorityQuests = _questController.ManualPriorityQuests;
		if (manualPriorityQuests.Count == 0)
		{
			ImGui.PushStyleColor(ImGuiCol.Text, ImGuiColors.DalamudGrey);
			ImGui.TextWrapped("No quests in priority queue. Add quests using the selector above to prioritise them over other available quests.");
			ImGui.PopStyleColor();
			return;
		}
		Quest quest = null;
		Quest quest2 = null;
		int index = 0;
		float x = ImGui.GetContentRegionAvail().X;
		List<(Vector2, Vector2)> list = new List<(Vector2, Vector2)>();
		for (int i = 0; i < manualPriorityQuests.Count; i++)
		{
			Vector2 item = ImGui.GetCursorScreenPos() + new Vector2(0f, (0f - ImGui.GetStyle().ItemSpacing.Y) / 2f);
			Quest quest3 = manualPriorityQuests[i];
			ImU8String id = new ImU8String(5, 1);
			id.AppendLiteral("Quest");
			id.AppendFormatted(quest3.Id);
			using (ImRaii.PushId(id))
			{
				ImGui.AlignTextToFramePadding();
				id = new ImU8String(1, 1);
				id.AppendFormatted(i + 1);
				id.AppendLiteral(".");
				ImGui.Text(id);
				ImGui.SameLine();
				(Vector4, FontAwesomeIcon, string) questStyle = _uiUtils.GetQuestStyle(quest3.Id);
				bool flag;
				using (_pluginInterface.UiBuilder.IconFontFixedWidthHandle.Push())
				{
					ImGui.AlignTextToFramePadding();
					ImGui.TextColored(in questStyle.Item1, questStyle.Item2.ToIconString());
					flag = ImGui.IsItemHovered();
				}
				ImGui.SameLine();
				ImGui.AlignTextToFramePadding();
				ImGui.Text(quest3.Info.Name);
				flag |= ImGui.IsItemHovered();
				if (flag)
				{
					_questTooltipComponent.Draw(quest3.Info);
				}
				if (manualPriorityQuests.Count > 1)
				{
					using (ImRaii.PushFont(UiBuilder.IconFont))
					{
						ImGui.SameLine(ImGui.GetContentRegionAvail().X + ImGui.GetStyle().WindowPadding.X - ImGui.CalcTextSize(FontAwesomeIcon.ArrowsUpDown.ToIconString()).X - ImGui.CalcTextSize(FontAwesomeIcon.Times.ToIconString()).X - ImGui.GetStyle().FramePadding.X * 4f - ImGui.GetStyle().ItemSpacing.X);
					}
					if (_draggedItem == quest3.Id)
					{
						ImGuiComponents.IconButton("##Move", FontAwesomeIcon.ArrowsUpDown, ImGui.ColorConvertU32ToFloat4(ImGui.GetColorU32(ImGuiCol.ButtonActive)));
					}
					else
					{
						ImGuiComponents.IconButton("##Move", FontAwesomeIcon.ArrowsUpDown);
					}
					if (_draggedItem == null && ImGui.IsItemActive() && ImGui.IsMouseDragging(ImGuiMouseButton.Left))
					{
						_draggedItem = quest3.Id;
					}
					ImGui.SameLine();
				}
				else
				{
					using (ImRaii.PushFont(UiBuilder.IconFont))
					{
						ImGui.SameLine(ImGui.GetContentRegionAvail().X + ImGui.GetStyle().WindowPadding.X - ImGui.CalcTextSize(FontAwesomeIcon.Times.ToIconString()).X - ImGui.GetStyle().FramePadding.X * 2f);
					}
				}
				if (ImGuiComponents.IconButton($"##Remove{i}", FontAwesomeIcon.Times))
				{
					quest = quest3;
				}
			}
			Vector2 item2 = new Vector2(item.X + x, ImGui.GetCursorScreenPos().Y - ImGui.GetStyle().ItemSpacing.Y + 2f);
			list.Add((item, item2));
		}
		if (!ImGui.IsMouseDragging(ImGuiMouseButton.Left))
		{
			_draggedItem = null;
		}
		else if (_draggedItem != null)
		{
			Quest item3 = manualPriorityQuests.Single((Quest quest4) => quest4.Id == _draggedItem);
			int num = manualPriorityQuests.IndexOf(item3);
			var (pMin, pMax) = list[num];
			ImGui.GetWindowDrawList().AddRect(pMin, pMax, ImGui.GetColorU32(ImGuiColors.DalamudGrey), 3f, ImDrawFlags.RoundCornersAll);
			int num2 = list.FindIndex(((Vector2 TopLeft, Vector2 BottomRight) tuple2) => ImGui.IsMouseHoveringRect(tuple2.TopLeft, tuple2.BottomRight, clip: true));
			if (num2 >= 0 && num != num2)
			{
				quest2 = manualPriorityQuests.Single((Quest quest4) => quest4.Id == _draggedItem);
				index = num2;
			}
		}
		if (quest != null)
		{
			manualPriorityQuests.Remove(quest);
		}
		if (quest2 != null)
		{
			manualPriorityQuests.Remove(quest2);
			manualPriorityQuests.Insert(index, quest2);
		}
	}

	public string EncodeQuestPriority()
	{
		return "qst:priority:" + Convert.ToBase64String(Encoding.UTF8.GetBytes(string.Join(';', _questController.ManualPriorityQuests.Select((Quest x) => x.Id.ToString()))));
	}

	private static List<ElementId> ParseClipboardItems()
	{
		return PriorityWindow.DecodeQuestPriority(ImGui.GetClipboardText().Trim());
	}

	private void ExportToClipboard()
	{
		ImGui.SetClipboardText(EncodeQuestPriority());
		_chatGui.Print("Copied quests to clipboard.", "Questionable", 576);
	}

	private void ImportFromClipboard(List<ElementId> questElements)
	{
		_questController.ImportQuestPriority(questElements);
	}
}