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.Utility.Raii;
using Dalamud.Plugin;
using Dalamud.Plugin.Services;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using Questionable.Controller;
using Questionable.Data;
using Questionable.Functions;
using Questionable.Model;
using Questionable.Model.Questing;
using Questionable.Windows.Utils;

namespace Questionable.Windows.QuestComponents;

internal sealed class SavedPresetsComponent
{
	private sealed class PresetExportData
	{
		public string Name { get; set; } = string.Empty;

		public string Description { get; set; } = string.Empty;

		public List<string> QuestIds { get; set; } = new List<string>();
	}

	private readonly QuestController _questController;

	private readonly QuestFunctions _questFunctions;

	private readonly QuestData _questData;

	private readonly QuestRegistry _questRegistry;

	private readonly Configuration _configuration;

	private readonly IDalamudPluginInterface _pluginInterface;

	private readonly IChatGui _chatGui;

	private readonly UiUtils _uiUtils;

	private readonly QuestTooltipComponent _questTooltipComponent;

	private readonly ILogger<SavedPresetsComponent> _logger;

	private string _newPresetName = string.Empty;

	private string _newPresetDescription = string.Empty;

	private bool _showSaveDialog;

	private string? _presetToDelete;

	private string? _expandedPreset;

	private string? _editingPresetKey;

	private string _editPresetName = string.Empty;

	private string _editPresetDescription = string.Empty;

	private string? _lastClipboardText;

	private PresetExportData? _clipboardPreset;

	private List<PresetExportData>? _clipboardAllPresets;

	private const string PresetClipboardPrefix = "qst:preset:";

	private const string AllPresetsClipboardPrefix = "qst:presets:";

	public SavedPresetsComponent(QuestController questController, QuestFunctions questFunctions, QuestData questData, QuestRegistry questRegistry, Configuration configuration, IDalamudPluginInterface pluginInterface, IChatGui chatGui, UiUtils uiUtils, QuestTooltipComponent questTooltipComponent, ILogger<SavedPresetsComponent> logger)
	{
		_questController = questController;
		_questFunctions = questFunctions;
		_questData = questData;
		_questRegistry = questRegistry;
		_configuration = configuration;
		_pluginInterface = pluginInterface;
		_chatGui = chatGui;
		_uiUtils = uiUtils;
		_questTooltipComponent = questTooltipComponent;
		_logger = logger;
	}

	public void Draw()
	{
		DrawSaveSection();
		UiThemeUtils.SectionSpacing();
		DrawSavedPresets();
		UiThemeUtils.SectionSpacing();
		DrawBottomButtons();
	}

	private void DrawSaveSection()
	{
		int count = _questController.ManualPriorityQuests.Count;
		float x = ImGui.GetContentRegionAvail().X;
		float x2 = ImGui.GetStyle().ItemSpacing.X;
		float width = (x - x2) / 2f;
		if (_showSaveDialog)
		{
			ImGui.SetNextItemWidth(x);
			ImGui.InputTextWithHint("##PresetName", "Preset name...", ref _newPresetName, 64);
			ImGui.SetNextItemWidth(x);
			ImGui.InputTextWithHint("##PresetDescription", "Description (optional)...", ref _newPresetDescription, 256);
			using (ImRaii.Disabled(string.IsNullOrWhiteSpace(_newPresetName) || count == 0))
			{
				if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Save, "Save", width))
				{
					SaveCurrentPreset();
				}
			}
			ImGui.SameLine();
			if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Times, "Cancel", width))
			{
				_showSaveDialog = false;
				_newPresetName = string.Empty;
				_newPresetDescription = string.Empty;
			}
			return;
		}
		using (ImRaii.Disabled(count == 0))
		{
			if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Plus, $"Save Current Queue ({count} quests)", x))
			{
				_showSaveDialog = true;
			}
		}
		if (count == 0 && ImGui.IsItemHovered(ImGuiHoveredFlags.AllowWhenDisabled))
		{
			ImGui.SetTooltip("Add quests to the priority queue first.");
		}
	}

	private void DrawSavedPresets()
	{
		Dictionary<string, Configuration.SavedQuestPreset> savedPresets = _configuration.General.SavedPresets;
		if (savedPresets.Count == 0)
		{
			string[] array = new string[3] { "No saved presets yet.", "Save your current priority queue using the", "button above." };
			float x = ImGui.GetContentRegionAvail().X;
			using (ImRaii.PushColor(ImGuiCol.Text, UiThemeUtils.MutedTextColor))
			{
				string[] array2 = array;
				foreach (string obj in array2)
				{
					float x2 = ImGui.CalcTextSize(obj).X;
					ImGui.SetCursorPosX(ImGui.GetCursorPosX() + (x - x2) / 2f);
					ImGui.TextUnformatted(obj);
				}
				return;
			}
		}
		bool flag = true;
		foreach (var (key, preset) in savedPresets.OrderBy((KeyValuePair<string, Configuration.SavedQuestPreset> keyValuePair2) => keyValuePair2.Value.Name))
		{
			if (!flag)
			{
				ImGui.Spacing();
			}
			flag = false;
			DrawPresetEntry(key, preset);
		}
		if (_presetToDelete != null)
		{
			if (savedPresets.Remove(_presetToDelete))
			{
				_pluginInterface.SavePluginConfig(_configuration);
				_logger.LogInformation("Deleted saved preset '{PresetName}'", _presetToDelete);
			}
			_presetToDelete = null;
		}
	}

	private void DrawPresetEntry(string key, Configuration.SavedQuestPreset preset)
	{
		using (ImRaii.PushId(key))
		{
			(Vector2 ContentStartPos, float AvailableWidth, ImDrawListPtr DrawList) tuple = UiThemeUtils.BeginCard();
			Vector2 item = tuple.ContentStartPos;
			float item2 = tuple.AvailableWidth;
			ImDrawListPtr item3 = tuple.DrawList;
			List<ElementId> availableQuests = GetAvailableQuests(preset.QuestIds);
			int count = preset.QuestIds.Count;
			string text = $"{count} {((count == 1) ? "quest" : "quests")}";
			ImGui.GetCursorPosX();
			float num = ImGui.GetContentRegionAvail().X - 12f;
			bool flag = _expandedPreset == key;
			float frameHeight = ImGui.GetFrameHeight();
			Vector2 cursorScreenPos = ImGui.GetCursorScreenPos();
			using (ImRaii.PushColor(ImGuiCol.Button, Vector4.Zero))
			{
				using (ImRaii.PushColor(ImGuiCol.ButtonHovered, UiThemeUtils.SubtleHoverColor))
				{
					using (ImRaii.PushColor(ImGuiCol.ButtonActive, UiThemeUtils.SubtlePressColor))
					{
						ImU8String label = new ImU8String(2, 1);
						label.AppendLiteral("##");
						label.AppendFormatted(key);
						if (ImGui.Button(label, new Vector2(num, frameHeight)))
						{
							_expandedPreset = (flag ? null : key);
							flag = _expandedPreset == key;
						}
					}
				}
			}
			ImDrawListPtr windowDrawList = ImGui.GetWindowDrawList();
			string text2 = (flag ? FontAwesomeIcon.CaretDown : FontAwesomeIcon.CaretRight).ToIconString();
			Vector2 vector;
			using (ImRaii.PushFont(UiBuilder.IconFont))
			{
				vector = ImGui.CalcTextSize(text2);
			}
			float y = cursorScreenPos.Y + (frameHeight - ImGui.GetTextLineHeight()) / 2f;
			float y2 = cursorScreenPos.Y + (frameHeight - vector.Y) / 2f;
			uint colorU = ImGui.GetColorU32(ImGuiCol.Text);
			Vector2 vector2 = ImGui.CalcTextSize(text);
			float x = ImGui.GetStyle().FramePadding.X;
			float num2 = cursorScreenPos.X + x + vector.X + 6f;
			float num3 = cursorScreenPos.X + num - vector2.X - x;
			windowDrawList.AddText(UiBuilder.IconFont, ImGui.GetFontSize(), new Vector2(cursorScreenPos.X + x, y2), colorU, text2);
			windowDrawList.AddText(new Vector2(num2, y), colorU, UiThemeUtils.TruncateToWidth(preset.Name, num3 - num2 - ImGui.GetStyle().ItemSpacing.X));
			windowDrawList.AddText(new Vector2(num3, y), ImGui.ColorConvertFloat4ToU32(UiThemeUtils.MutedTextColor), text);
			if (flag)
			{
				if (_editingPresetKey == key)
				{
					float x2 = ImGui.GetContentRegionAvail().X;
					ImGui.SetNextItemWidth(x2);
					ImGui.InputTextWithHint("##EditName", "Preset name...", ref _editPresetName, 64);
					ImGui.SetNextItemWidth(x2);
					ImGui.InputTextWithHint("##EditDesc", "Description (optional)...", ref _editPresetDescription, 256);
					float width = (x2 - ImGui.GetStyle().ItemSpacing.X) / 2f;
					using (ImRaii.Disabled(string.IsNullOrWhiteSpace(_editPresetName)))
					{
						if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Save, "Save", width))
						{
							preset.Name = _editPresetName.Trim();
							preset.Description = _editPresetDescription.Trim();
							_pluginInterface.SavePluginConfig(_configuration);
							_editingPresetKey = null;
						}
					}
					ImGui.SameLine();
					if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Times, "Cancel", width))
					{
						_editingPresetKey = null;
					}
				}
				else
				{
					using (ImRaii.PushColor(ImGuiCol.Text, UiThemeUtils.DimTextColor))
					{
						foreach (ElementId questId in preset.QuestIds)
						{
							if (_questData.TryGetQuestInfo(questId, out IQuestInfo questInfo))
							{
								UiThemeUtils.WrappedText(questInfo.Name);
								if (ImGui.IsItemHovered())
								{
									_questTooltipComponent.Draw(questInfo);
								}
							}
							else
							{
								UiThemeUtils.WrappedText(questId.ToString());
							}
						}
					}
					ImGui.Spacing();
					float width2 = (num - ImGui.GetStyle().ItemSpacing.X * 3f) / 4f;
					using (ImRaii.Disabled(availableQuests.Count == 0))
					{
						if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Plus, "Add", width2))
						{
							AddPresetToPriority(availableQuests);
						}
					}
					ImGui.SameLine();
					if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Upload, "Export", width2))
					{
						ExportPresetToClipboard(preset);
					}
					ImGui.SameLine();
					if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Pen, "Edit", width2))
					{
						_editingPresetKey = key;
						_editPresetName = preset.Name;
						_editPresetDescription = preset.Description;
					}
					ImGui.SameLine();
					using (ImRaii.Disabled(!ImGui.IsKeyDown(ImGuiKey.ModCtrl)))
					{
						if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Trash, "Delete", width2))
						{
							_presetToDelete = key;
						}
					}
					if (ImGui.IsItemHovered(ImGuiHoveredFlags.AllowWhenDisabled))
					{
						ImGui.SetTooltip("Hold CTRL to delete");
					}
				}
			}
			UiThemeUtils.EndCard(item, item2, item3);
		}
	}

	private void DrawBottomButtons()
	{
		PresetExportData presetExportData = ParseClipboardPreset();
		List<PresetExportData> list = ParseClipboardAllPresets();
		float x = ImGui.GetContentRegionAvail().X;
		float x2 = ImGui.GetStyle().ItemSpacing.X;
		float width = (x - x2) / 2f;
		using (ImRaii.Disabled(presetExportData == null && list == null))
		{
			string text = ((list != null) ? $"Import ({list.Count})" : "Import");
			if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Download, text, width))
			{
				if (list != null)
				{
					ImportAllPresetsFromClipboard(list);
				}
				else if (presetExportData != null)
				{
					ImportPresetFromClipboard(presetExportData);
				}
			}
		}
		if (presetExportData == null && list == null && ImGui.IsItemHovered(ImGuiHoveredFlags.AllowWhenDisabled))
		{
			ImGui.SetTooltip("Copy a valid preset string to clipboard first.");
		}
		ImGui.SameLine();
		int count = _configuration.General.SavedPresets.Count;
		using (ImRaii.Disabled(count == 0))
		{
			if (UiThemeUtils.IconTextButton(FontAwesomeIcon.Upload, $"Export ({count})", width))
			{
				ExportAllPresetsToClipboard();
			}
		}
		if (count == 0 && ImGui.IsItemHovered(ImGuiHoveredFlags.AllowWhenDisabled))
		{
			ImGui.SetTooltip("No saved presets to export.");
		}
	}

	private void SaveCurrentPreset()
	{
		List<ElementId> list = _questController.ManualPriorityQuests.Select((Quest q) => q.Id).ToList();
		string key = GeneratePresetKey(_newPresetName);
		Configuration.SavedQuestPreset savedQuestPreset = new Configuration.SavedQuestPreset
		{
			Name = _newPresetName.Trim(),
			Description = _newPresetDescription.Trim(),
			QuestIds = list,
			CreatedAt = DateTime.UtcNow
		};
		_configuration.General.SavedPresets[key] = savedQuestPreset;
		_pluginInterface.SavePluginConfig(_configuration);
		_logger.LogInformation("Saved preset '{PresetName}' with {Count} quests", savedQuestPreset.Name, list.Count);
		_chatGui.Print($"Saved preset '{savedQuestPreset.Name}' with {list.Count} quests.", "Questionable", 576);
		_newPresetName = string.Empty;
		_newPresetDescription = string.Empty;
		_showSaveDialog = false;
	}

	private string GeneratePresetKey(string name)
	{
		string text = "user_" + name.Trim().ToUpperInvariant().Replace(' ', '_');
		string text2 = text;
		int num = 1;
		while (_configuration.General.SavedPresets.ContainsKey(text2))
		{
			text2 = $"{text}_{num}";
			num++;
		}
		return text2;
	}

	private void ExportPresetToClipboard(Configuration.SavedQuestPreset preset)
	{
		string s = JsonConvert.SerializeObject(new PresetExportData
		{
			Name = preset.Name,
			Description = preset.Description,
			QuestIds = preset.QuestIds.Select((ElementId x) => x.ToString()).ToList()
		});
		ImGui.SetClipboardText("qst:preset:" + Convert.ToBase64String(Encoding.UTF8.GetBytes(s)));
		_chatGui.Print("Exported preset '" + preset.Name + "' to clipboard.", "Questionable", 576);
	}

	private void ExportAllPresetsToClipboard()
	{
		List<PresetExportData> list = _configuration.General.SavedPresets.Values.Select((Configuration.SavedQuestPreset preset) => new PresetExportData
		{
			Name = preset.Name,
			Description = preset.Description,
			QuestIds = preset.QuestIds.Select((ElementId x) => x.ToString()).ToList()
		}).ToList();
		string s = JsonConvert.SerializeObject(list);
		ImGui.SetClipboardText("qst:presets:" + Convert.ToBase64String(Encoding.UTF8.GetBytes(s)));
		_chatGui.Print($"Exported {list.Count} presets to clipboard.", "Questionable", 576);
	}

	private void RefreshClipboardPresets()
	{
		string text = ThrottledClipboard.GetText();
		if (text == _lastClipboardText)
		{
			return;
		}
		_lastClipboardText = text;
		_clipboardPreset = null;
		_clipboardAllPresets = null;
		try
		{
			if (text.StartsWith("qst:preset:", StringComparison.InvariantCulture))
			{
				string s = text.Substring("qst:preset:".Length);
				string value = Encoding.UTF8.GetString(Convert.FromBase64String(s));
				_clipboardPreset = JsonConvert.DeserializeObject<PresetExportData>(value);
			}
			else if (text.StartsWith("qst:presets:", StringComparison.InvariantCulture))
			{
				string s2 = text.Substring("qst:presets:".Length);
				string value2 = Encoding.UTF8.GetString(Convert.FromBase64String(s2));
				_clipboardAllPresets = JsonConvert.DeserializeObject<List<PresetExportData>>(value2);
			}
		}
		catch (Exception exception)
		{
			_logger.LogDebug(exception, "Failed to parse presets from clipboard");
		}
	}

	private PresetExportData? ParseClipboardPreset()
	{
		RefreshClipboardPresets();
		return _clipboardPreset;
	}

	private List<PresetExportData>? ParseClipboardAllPresets()
	{
		RefreshClipboardPresets();
		return _clipboardAllPresets;
	}

	private bool PresetNameExists(string name)
	{
		return _configuration.General.SavedPresets.Values.Any((Configuration.SavedQuestPreset p) => string.Equals(p.Name, name, StringComparison.OrdinalIgnoreCase));
	}

	private void ImportPresetFromClipboard(PresetExportData exportData)
	{
		try
		{
			if (PresetNameExists(exportData.Name))
			{
				_chatGui.Print("Preset '" + exportData.Name + "' already exists, skipping.", "Questionable", 576);
				return;
			}
			int skippedCount;
			List<ElementId> list = ElementId.FromStrings(exportData.QuestIds, out skippedCount);
			if (list.Count == 0)
			{
				_chatGui.PrintError("Preset '" + exportData.Name + "' contains no importable quests.", "Questionable", 576);
				return;
			}
			string key = GeneratePresetKey(exportData.Name);
			Configuration.SavedQuestPreset savedQuestPreset = new Configuration.SavedQuestPreset
			{
				Name = exportData.Name,
				Description = exportData.Description,
				QuestIds = list,
				CreatedAt = DateTime.UtcNow
			};
			_configuration.General.SavedPresets[key] = savedQuestPreset;
			_pluginInterface.SavePluginConfig(_configuration);
			_logger.LogInformation("Imported preset '{PresetName}' with {Count} quests from clipboard, skipped {Skipped} unknown ids", savedQuestPreset.Name, list.Count, skippedCount);
			string text = $"Imported preset '{savedQuestPreset.Name}' with {list.Count} quests.";
			if (skippedCount > 0)
			{
				text += $" Skipped {skippedCount} unknown quest ids.";
			}
			_chatGui.Print(text, "Questionable", 576);
		}
		catch (Exception ex)
		{
			_logger.LogError(ex, "Failed to import preset from clipboard");
			_chatGui.PrintError("Failed to import preset: " + ex.Message, "Questionable", 576);
		}
	}

	private void ImportAllPresetsFromClipboard(List<PresetExportData> allExportData)
	{
		try
		{
			int num = 0;
			int num2 = 0;
			int num3 = 0;
			HashSet<string> hashSet = _configuration.General.SavedPresets.Values.Select((Configuration.SavedQuestPreset p) => p.Name).ToHashSet<string>(StringComparer.OrdinalIgnoreCase);
			foreach (PresetExportData allExportDatum in allExportData)
			{
				if (hashSet.Contains(allExportDatum.Name))
				{
					num2++;
					continue;
				}
				int skippedCount;
				List<ElementId> list = ElementId.FromStrings(allExportDatum.QuestIds, out skippedCount);
				num3 += skippedCount;
				if (list.Count == 0)
				{
					num2++;
					continue;
				}
				string key = GeneratePresetKey(allExportDatum.Name);
				Configuration.SavedQuestPreset value = new Configuration.SavedQuestPreset
				{
					Name = allExportDatum.Name,
					Description = allExportDatum.Description,
					QuestIds = list,
					CreatedAt = DateTime.UtcNow
				};
				_configuration.General.SavedPresets[key] = value;
				num++;
			}
			if (num > 0)
			{
				_pluginInterface.SavePluginConfig(_configuration);
			}
			string text = $"Imported {num} presets from clipboard.";
			if (num2 > 0)
			{
				text += $" Skipped {num2} (already exist or empty).";
			}
			if (num3 > 0)
			{
				text += $" Skipped {num3} unknown quest ids.";
			}
			_logger.LogInformation("Imported {Imported} presets from clipboard, skipped {Skipped} presets and {SkippedIds} unknown ids", num, num2, num3);
			_chatGui.Print(text, "Questionable", 576);
		}
		catch (Exception ex)
		{
			_logger.LogError(ex, "Failed to import presets from clipboard");
			_chatGui.PrintError("Failed to import presets: " + ex.Message, "Questionable", 576);
		}
	}

	private void AddPresetToPriority(List<ElementId> questIds)
	{
		int num = 0;
		foreach (ElementId questId in questIds)
		{
			if (_questController.AddQuestPriority(questId))
			{
				num++;
			}
		}
		if (num > 0)
		{
			_chatGui.Print($"Added {num} quests to priority queue.", "Questionable", 576);
		}
		_logger.LogInformation("Added {Count} quests from saved preset to priority list", num);
	}

	private List<ElementId> GetAvailableQuests(List<ElementId> questIds)
	{
		return (from questId in questIds
			where _questFunctions.IsReadyToAcceptQuest(questId) || _questFunctions.IsQuestAccepted(questId)
			where !_questController.ManualPriorityQuests.Any((Quest q) => q.Id.Equals(questId))
			where _questRegistry.IsKnownQuest(questId)
			select questId).ToList();
	}

	private List<ElementId> GetAlreadyPriorityQuests(List<ElementId> questIds)
	{
		return (from questId in questIds
			where _questController.ManualPriorityQuests.Any((Quest q) => q.Id.Equals(questId))
			where !_questFunctions.IsQuestComplete(questId)
			select questId).ToList();
	}
}