using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Numerics;
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.Utility;
using Microsoft.Extensions.Logging;
using Questionable.Controller;
using Questionable.Data;
using Questionable.Functions;
using Questionable.Model;
using Questionable.Model.Questing;
using Questionable.Validation;
using Questionable.Windows.QuestComponents;

namespace Questionable.Windows.JournalComponents;

internal sealed class QuestJournalComponent
{
	private sealed record FilteredSection(JournalData.Section Section, List<FilteredCategory> Categories);

	private sealed record FilteredCategory(JournalData.Category Category, List<FilteredGenre> Genres);

	private sealed record FilteredGenre(JournalData.Genre Genre, List<IQuestInfo> Quests);

	private sealed record JournalCounts(int Available, int Total, int Obtainable, int Completed)
	{
		public JournalCounts()
			: this(0, 0, 0, 0)
		{
		}
	}

	internal sealed class FilterConfiguration
	{
		public string SearchText = string.Empty;

		public bool AvailableOnly;

		public bool HideNoPaths;

		public bool HideUnobtainable;

		public bool AdvancedFiltersActive
		{
			get
			{
				if (!AvailableOnly && !HideNoPaths)
				{
					return HideUnobtainable;
				}
				return true;
			}
		}

		public FilterConfiguration WithoutName()
		{
			return new FilterConfiguration
			{
				AvailableOnly = AvailableOnly,
				HideNoPaths = HideNoPaths,
				HideUnobtainable = HideUnobtainable
			};
		}
	}

	private readonly Dictionary<JournalData.Genre, JournalCounts> _genreCounts = new Dictionary<JournalData.Genre, JournalCounts>();

	private readonly Dictionary<JournalData.Category, JournalCounts> _categoryCounts = new Dictionary<JournalData.Category, JournalCounts>();

	private readonly Dictionary<JournalData.Section, JournalCounts> _sectionCounts = new Dictionary<JournalData.Section, JournalCounts>();

	private readonly JournalData _journalData;

	private readonly QuestRegistry _questRegistry;

	private readonly QuestFunctions _questFunctions;

	private readonly UiUtils _uiUtils;

	private readonly QuestTooltipComponent _questTooltipComponent;

	private readonly IDalamudPluginInterface _pluginInterface;

	private readonly QuestJournalUtils _questJournalUtils;

	private readonly QuestValidator _questValidator;

	private readonly Configuration _configuration;

	private readonly ILogger<QuestJournalComponent> _logger;

	private const uint SeasonalJournalCategoryRowId = 96u;

	private List<FilteredSection> _filteredSections = new List<FilteredSection>();

	private bool _lastHideSeasonalGlobally;

	internal FilterConfiguration Filter { get; } = new FilterConfiguration();

	public QuestJournalComponent(JournalData journalData, QuestRegistry questRegistry, QuestFunctions questFunctions, UiUtils uiUtils, QuestTooltipComponent questTooltipComponent, IDalamudPluginInterface pluginInterface, QuestJournalUtils questJournalUtils, QuestValidator questValidator, Configuration configuration, ILogger<QuestJournalComponent> logger)
	{
		_journalData = journalData;
		_questRegistry = questRegistry;
		_questFunctions = questFunctions;
		_uiUtils = uiUtils;
		_questTooltipComponent = questTooltipComponent;
		_pluginInterface = pluginInterface;
		_questJournalUtils = questJournalUtils;
		_questValidator = questValidator;
		_configuration = configuration;
		_logger = logger;
		_lastHideSeasonalGlobally = _configuration.General.HideSeasonalEventsFromJournalProgress;
	}

	public void DrawQuests()
	{
		using ImRaii.IEndObject endObject = ImRaii.TabItem("Quests");
		if (!endObject)
		{
			return;
		}
		bool hideSeasonalEventsFromJournalProgress = _configuration.General.HideSeasonalEventsFromJournalProgress;
		if (hideSeasonalEventsFromJournalProgress != _lastHideSeasonalGlobally)
		{
			_lastHideSeasonalGlobally = hideSeasonalEventsFromJournalProgress;
			_logger.LogDebug("Configuration change detected: HideSeasonalEventsFromJournalProgress={Hide} - refreshing journal", hideSeasonalEventsFromJournalProgress);
			UpdateFilter();
		}
		if (ImGui.CollapsingHeader("Explanation", ImGuiTreeNodeFlags.DefaultOpen))
		{
			ImGui.Text("The list below contains all quests that appear in your journal.");
			ImGui.BulletText("'Supported' lists quests that Questionable can do for you");
			ImGui.BulletText("'Completed' lists quests your current character has completed.");
			ImGui.BulletText("Not all quests can be completed even if they're listed as available, e.g. starting city quest chains or past seasonal events.");
			ImGui.Spacing();
			ImGui.Separator();
			ImGui.Spacing();
		}
		QuestJournalUtils.ShowFilterContextMenu(this);
		ImGui.SameLine();
		if (ImGuiComponents.IconButton(FontAwesomeIcon.GlobeEurope))
		{
			Util.OpenLink("https://wigglymuffin.github.io/FFXIV-Tools/");
		}
		if (ImGui.IsItemHovered())
		{
			ImGui.SetTooltip("View All Quest Paths Online");
		}
		ImGui.SameLine();
		ImGui.SetNextItemWidth(ImGui.GetContentRegionAvail().X);
		if (ImGui.InputTextWithHint(string.Empty, "Search quests and categories", ref Filter.SearchText, 256))
		{
			UpdateFilter();
		}
		if (_filteredSections.Count > 0)
		{
			using (ImRaii.IEndObject endObject2 = ImRaii.Table("Quests", 3, ImGuiTableFlags.NoSavedSettings))
			{
				if (!endObject2)
				{
					return;
				}
				ImGui.TableSetupColumn("Name", ImGuiTableColumnFlags.NoHide);
				ImGui.TableSetupColumn("Supported", ImGuiTableColumnFlags.WidthFixed, 120f * ImGui.GetIO().FontGlobalScale);
				ImGui.TableSetupColumn("Completed", ImGuiTableColumnFlags.WidthFixed, 120f * ImGui.GetIO().FontGlobalScale);
				ImGui.TableHeadersRow();
				foreach (FilteredSection filteredSection in _filteredSections)
				{
					DrawSection(filteredSection);
				}
				return;
			}
		}
		ImGui.Text("No quest or category matches your search.");
	}

	private void DrawSection(FilteredSection filter)
	{
		var (count, num5, total, count2) = _sectionCounts.GetValueOrDefault(filter.Section, new JournalCounts());
		if (num5 == 0)
		{
			return;
		}
		ImGui.TableNextRow();
		ImGui.TableNextColumn();
		bool num6 = ImGui.TreeNodeEx(filter.Section.Name, ImGuiTreeNodeFlags.SpanFullWidth);
		ImGui.TableNextColumn();
		DrawCount(count, num5);
		ImGui.TableNextColumn();
		DrawCount(count2, total);
		if (!num6)
		{
			return;
		}
		foreach (FilteredCategory category in filter.Categories)
		{
			DrawCategory(category);
		}
		ImGui.TreePop();
	}

	private void DrawCategory(FilteredCategory filter)
	{
		var (count, num5, total, count2) = _categoryCounts.GetValueOrDefault(filter.Category, new JournalCounts());
		if (num5 == 0)
		{
			return;
		}
		ImGui.TableNextRow();
		ImGui.TableNextColumn();
		bool num6 = ImGui.TreeNodeEx(filter.Category.Name, ImGuiTreeNodeFlags.SpanFullWidth);
		ImGui.TableNextColumn();
		DrawCount(count, num5);
		ImGui.TableNextColumn();
		DrawCount(count2, total);
		if (!num6)
		{
			return;
		}
		foreach (FilteredGenre genre in filter.Genres)
		{
			DrawGenre(genre);
		}
		ImGui.TreePop();
	}

	private void DrawGenre(FilteredGenre filter)
	{
		var (count, num5, total, count2) = _genreCounts.GetValueOrDefault(filter.Genre, new JournalCounts());
		if (num5 == 0)
		{
			return;
		}
		ImGui.TableNextRow();
		ImGui.TableNextColumn();
		bool num6 = ImGui.TreeNodeEx(filter.Genre.Name, ImGuiTreeNodeFlags.SpanFullWidth);
		ImGui.TableNextColumn();
		DrawCount(count, num5);
		ImGui.TableNextColumn();
		DrawCount(count2, total);
		if (!num6)
		{
			return;
		}
		foreach (IQuestInfo quest in filter.Quests)
		{
			DrawQuest(quest);
		}
		ImGui.TreePop();
	}

	private void DrawQuest(IQuestInfo questInfo)
	{
		_questRegistry.TryGetQuest(questInfo.QuestId, out Quest quest);
		ImGui.TableNextRow();
		ImGui.TableNextColumn();
		DrawQuestName(questInfo, out var expansionHovered);
		DrawQuestTooltipAndContextMenu(questInfo, quest, expansionHovered);
		ImGui.TableNextColumn();
		DrawQuestSupportStatus(questInfo, quest);
		ImGui.TableNextColumn();
		DrawQuestCompletionStatus(questInfo);
	}

	private static void DrawQuestName(IQuestInfo questInfo, out bool expansionHovered)
	{
		expansionHovered = false;
		if (questInfo.Expansion != (EExpansionVersion)255)
		{
			ImGui.PushFont(UiBuilder.MonoFont);
			ImGui.PushStyleColor(ImGuiCol.Text, questInfo.Expansion.GetExpansionColor());
			ImGui.TextUnformatted(questInfo.Expansion.ToAbbreviation().PadRight(3));
			ImGui.PopStyleColor();
			ImGui.PopFont();
			if (ImGui.IsItemHovered())
			{
				expansionHovered = true;
			}
			ImGui.SameLine();
		}
		ImU8String id = new ImU8String(3, 2);
		id.AppendFormatted(questInfo.Name);
		id.AppendLiteral(" (");
		id.AppendFormatted(questInfo.QuestId);
		id.AppendLiteral(")");
		ImGui.TreeNodeEx(id, ImGuiTreeNodeFlags.NoTreePushOnOpen | ImGuiTreeNodeFlags.Leaf | ImGuiTreeNodeFlags.SpanFullWidth);
	}

	private void DrawQuestTooltipAndContextMenu(IQuestInfo questInfo, Quest? quest, bool expansionHovered)
	{
		if ((ImGui.IsItemHovered() || expansionHovered) && questInfo.Expansion != (EExpansionVersion)255)
		{
			ImGui.BeginTooltip();
			ImGui.PushStyleColor(ImGuiCol.Text, questInfo.Expansion.GetExpansionColor());
			ImGui.TextUnformatted(questInfo.Expansion.ToFriendlyString());
			ImGui.PopStyleColor();
			ImGui.Separator();
			_questTooltipComponent.Draw(questInfo);
			ImGui.EndTooltip();
		}
		else if (ImGui.IsItemHovered() && questInfo.Expansion == (EExpansionVersion)255)
		{
			_questTooltipComponent.Draw(questInfo);
		}
		_questJournalUtils.ShowContextMenu(questInfo, quest, "QuestJournalComponent");
	}

	private void DrawQuestSupportStatus(IQuestInfo questInfo, Quest? quest)
	{
		float num;
		using (_pluginInterface.UiBuilder.IconFontFixedWidthHandle.Push())
		{
			num = ImGui.GetColumnWidth() / 2f - ImGui.CalcTextSize(FontAwesomeIcon.Check.ToIconString()).X;
		}
		ImGui.SetCursorPosX(ImGui.GetCursorPosX() + num);
		if (_questFunctions.IsQuestRemoved(questInfo.QuestId))
		{
			_uiUtils.ChecklistItem(string.Empty, ImGuiColors.DalamudGrey, FontAwesomeIcon.Minus);
			return;
		}
		if (quest != null)
		{
			QuestRoot root = quest.Root;
			if (root != null && !root.Disabled)
			{
				List<ValidationIssue> issues = _questValidator.GetIssues(quest.Id);
				if (issues.Any((ValidationIssue x) => x.Severity == EIssueSeverity.Error))
				{
					_uiUtils.ChecklistItem(string.Empty, ImGuiColors.DalamudRed, FontAwesomeIcon.ExclamationTriangle);
				}
				else if (issues.Count > 0)
				{
					_uiUtils.ChecklistItem(string.Empty, ImGuiColors.ParsedBlue, FontAwesomeIcon.InfoCircle);
				}
				else
				{
					_uiUtils.ChecklistItem(string.Empty, complete: true);
				}
				return;
			}
		}
		_uiUtils.ChecklistItem(string.Empty, complete: false);
	}

	private void DrawQuestCompletionStatus(IQuestInfo questInfo)
	{
		if (_questFunctions.IsQuestAccepted(questInfo.QuestId))
		{
			_uiUtils.ChecklistItem("Active", ImGuiColors.DalamudYellow, FontAwesomeIcon.PersonWalkingArrowRight);
		}
		else if (_questFunctions.IsQuestComplete(questInfo.QuestId))
		{
			DrawCompletedQuestStatus(questInfo);
		}
		else
		{
			DrawIncompleteQuestStatus(questInfo);
		}
	}

	private void DrawCompletedQuestStatus(IQuestInfo questInfo)
	{
		if (!questInfo.IsRepeatable)
		{
			_uiUtils.ChecklistItem("Complete", ImGuiColors.ParsedGreen, FontAwesomeIcon.Check);
			return;
		}
		bool num = _questFunctions.IsQuestLocked(questInfo.QuestId);
		bool flag = _questFunctions.IsReadyToAcceptQuest(questInfo.QuestId);
		if (!num && flag)
		{
			_uiUtils.ChecklistItem("Available", ImGuiColors.ParsedBlue, FontAwesomeIcon.Running);
		}
		else
		{
			_uiUtils.ChecklistItem("Complete", ImGuiColors.ParsedGreen, FontAwesomeIcon.Check);
		}
	}

	private void DrawIncompleteQuestStatus(IQuestInfo questInfo)
	{
		bool num = IsQuestExpired(questInfo);
		bool flag = _questFunctions.IsQuestUnobtainable(questInfo.QuestId);
		bool flag2 = _questFunctions.IsQuestLocked(questInfo.QuestId);
		bool flag3 = _questFunctions.IsReadyToAcceptQuest(questInfo.QuestId);
		if (num || flag)
		{
			_uiUtils.ChecklistItem("Unobtainable", ImGuiColors.DalamudGrey, FontAwesomeIcon.Minus);
		}
		else if (flag2 || !flag3 || !_questRegistry.IsKnownQuest(questInfo.QuestId))
		{
			_uiUtils.ChecklistItem("Locked", ImGuiColors.DalamudRed, FontAwesomeIcon.Times);
		}
		else
		{
			_uiUtils.ChecklistItem("Available", ImGuiColors.DalamudYellow, FontAwesomeIcon.Running);
		}
	}

	private static bool IsQuestExpired(IQuestInfo questInfo)
	{
		DateTime? seasonalQuestExpiry = questInfo.SeasonalQuestExpiry;
		if (seasonalQuestExpiry.HasValue)
		{
			DateTime valueOrDefault = seasonalQuestExpiry.GetValueOrDefault();
			DateTime dateTime = ((valueOrDefault.Kind == DateTimeKind.Utc) ? valueOrDefault : valueOrDefault.ToUniversalTime());
			return DateTime.UtcNow > dateTime;
		}
		return false;
	}

	private static void DrawCount(int count, int total)
	{
		string text = 9999.ToString(CultureInfo.CurrentCulture);
		ImGui.PushFont(UiBuilder.MonoFont);
		if (total == 0)
		{
			Vector4 col = ImGuiColors.DalamudGrey;
			ImU8String text2 = new ImU8String(3, 2);
			text2.AppendFormatted("-".PadLeft(text.Length));
			text2.AppendLiteral(" / ");
			text2.AppendFormatted("-".PadLeft(text.Length));
			ImGui.TextColored(in col, text2);
		}
		else
		{
			string text3 = count.ToString(CultureInfo.CurrentCulture).PadLeft(text.Length) + " / " + total.ToString(CultureInfo.CurrentCulture).PadLeft(text.Length);
			if (count == total)
			{
				ImGui.TextColored(ImGuiColors.ParsedGreen, text3);
			}
			else
			{
				ImGui.TextUnformatted(text3);
			}
		}
		ImGui.PopFont();
	}

	public void UpdateFilter()
	{
		_filteredSections = (from x in _journalData.Sections
			select FilterSection(x, Filter) into x
			where x.Categories.Count > 0
			select x).ToList();
		RefreshCounts();
	}

	private FilteredSection FilterSection(JournalData.Section section, FilterConfiguration filter)
	{
		IEnumerable<JournalData.Category> enumerable;
		if (!_configuration.General.HideSeasonalEventsFromJournalProgress)
		{
			IEnumerable<JournalData.Category> categories = section.Categories;
			enumerable = categories;
		}
		else
		{
			enumerable = section.Categories.Where((JournalData.Category c) => c.Id != 96);
		}
		IEnumerable<JournalData.Category> source = enumerable;
		return new FilteredSection(Categories: ((!IsCategorySectionGenreMatch(filter, section.Name)) ? source.Select((JournalData.Category category) => FilterCategory(category, filter, section)) : source.Select((JournalData.Category x) => FilterCategory(x, filter.WithoutName(), section))).Where((FilteredCategory x) => x.Genres.Count > 0).ToList(), Section: section);
	}

	private FilteredCategory FilterCategory(JournalData.Category category, FilterConfiguration filter, JournalData.Section? parentSection = null)
	{
		IEnumerable<FilteredGenre> source = ((!IsCategorySectionGenreMatch(filter, category.Name)) ? category.Genres.Select((JournalData.Genre genre) => FilterGenre(genre, filter, parentSection)) : category.Genres.Select((JournalData.Genre x) => FilterGenre(x, filter.WithoutName(), parentSection)));
		return new FilteredCategory(category, source.Where((FilteredGenre x) => x.Quests.Count > 0).ToList());
	}

	private FilteredGenre FilterGenre(JournalData.Genre genre, FilterConfiguration filter, JournalData.Section? parentSection = null)
	{
		bool hideSeasonalEventsFromJournalProgress = _configuration.General.HideSeasonalEventsFromJournalProgress;
		IEnumerable<IQuestInfo> source = ((!IsCategorySectionGenreMatch(filter, genre.Name)) ? genre.Quests.Where((IQuestInfo x) => IsQuestMatch(filter, x)) : genre.Quests.Where((IQuestInfo x) => IsQuestMatch(filter.WithoutName(), x)));
		if (hideSeasonalEventsFromJournalProgress && genre.CategoryId == 96)
		{
			source = source.Where((IQuestInfo q) => !IsSeasonal(q));
		}
		return new FilteredGenre(genre, source.ToList());
	}

	internal void RefreshCounts()
	{
		_genreCounts.Clear();
		_categoryCounts.Clear();
		_sectionCounts.Clear();
		bool hideSeasonalEventsFromJournalProgress = _configuration.General.HideSeasonalEventsFromJournalProgress;
		_logger.LogInformation("Refreshing journal counts. HideSeasonalEventsFromJournalProgress={Hide}", hideSeasonalEventsFromJournalProgress);
		foreach (JournalData.Genre genre in _journalData.Genres)
		{
			List<IQuestInfo> source = ((hideSeasonalEventsFromJournalProgress && genre.CategoryId == 96) ? genre.Quests.Where((IQuestInfo q) => !IsSeasonal(q)).ToList() : genre.Quests.ToList());
			Quest quest;
			int available = source.Count((IQuestInfo x) => _questRegistry.TryGetQuest(x.QuestId, out quest) && !quest.Root.Disabled && !_questFunctions.IsQuestRemoved(x.QuestId));
			int total = source.Count((IQuestInfo x) => !_questFunctions.IsQuestRemoved(x.QuestId));
			int obtainable = source.Count((IQuestInfo x) => !_questFunctions.IsQuestUnobtainable(x.QuestId));
			int completed = source.Count((IQuestInfo x) => _questFunctions.IsQuestComplete(x.QuestId));
			_genreCounts[genre] = new JournalCounts(available, total, obtainable, completed);
		}
		foreach (JournalData.Category category in _journalData.Categories)
		{
			if (!hideSeasonalEventsFromJournalProgress || category.Id != 96)
			{
				List<JournalCounts> source2 = _genre_counts_or_default(category);
				int available2 = source2.Sum((JournalCounts x) => x.Available);
				int total2 = source2.Sum((JournalCounts x) => x.Total);
				int obtainable2 = source2.Sum((JournalCounts x) => x.Obtainable);
				int completed2 = source2.Sum((JournalCounts x) => x.Completed);
				_categoryCounts[category] = new JournalCounts(available2, total2, obtainable2, completed2);
			}
		}
		foreach (JournalData.Section section in _journalData.Sections)
		{
			List<JournalCounts> source3 = (from x in _categoryCounts
				where section.Categories.Contains(x.Key)
				select x.Value).ToList();
			int available3 = source3.Sum((JournalCounts x) => x.Available);
			int total3 = source3.Sum((JournalCounts x) => x.Total);
			int obtainable3 = source3.Sum((JournalCounts x) => x.Obtainable);
			int completed3 = source3.Sum((JournalCounts x) => x.Completed);
			_sectionCounts[section] = new JournalCounts(available3, total3, obtainable3, completed3);
		}
		int num = _sectionCounts.Values.Sum((JournalCounts x) => x.Total);
		_logger.LogDebug("RefreshCounts complete. Sections={Sections}, Categories={Categories}, Genres={Genres}, TotalQuests={Total}", _sectionCounts.Count, _categoryCounts.Count, _genreCounts.Count, num);
	}

	private List<JournalCounts> _genre_counts_or_default(JournalData.Category category)
	{
		return (from x in _genreCounts
			where category.Genres.Contains(x.Key)
			select x.Value).ToList();
	}

	internal void ClearCounts(int type, int code)
	{
		foreach (KeyValuePair<JournalData.Genre, JournalCounts> item in _genreCounts.ToList())
		{
			_genreCounts[item.Key] = item.Value with
			{
				Completed = 0
			};
		}
		foreach (KeyValuePair<JournalData.Category, JournalCounts> item2 in _categoryCounts.ToList())
		{
			_categoryCounts[item2.Key] = item2.Value with
			{
				Completed = 0
			};
		}
		foreach (KeyValuePair<JournalData.Section, JournalCounts> item3 in _sectionCounts.ToList())
		{
			_sectionCounts[item3.Key] = item3.Value with
			{
				Completed = 0
			};
		}
	}

	private static bool IsCategorySectionGenreMatch(FilterConfiguration filter, string name)
	{
		if (!string.IsNullOrEmpty(filter.SearchText))
		{
			return name.Contains(filter.SearchText, StringComparison.CurrentCultureIgnoreCase);
		}
		return true;
	}

	private bool IsQuestMatch(FilterConfiguration filter, IQuestInfo questInfo)
	{
		if (!string.IsNullOrEmpty(filter.SearchText) && !questInfo.Name.Contains(filter.SearchText, StringComparison.CurrentCultureIgnoreCase) && !(questInfo.QuestId.ToString() == filter.SearchText))
		{
			return false;
		}
		if (filter.AvailableOnly && !_questFunctions.IsReadyToAcceptQuest(questInfo.QuestId))
		{
			return false;
		}
		if (filter.HideNoPaths && (!_questRegistry.TryGetQuest(questInfo.QuestId, out Quest quest) || quest.Root.Disabled))
		{
			return false;
		}
		if (filter.HideUnobtainable && _questFunctions.IsQuestUnobtainable(questInfo.QuestId))
		{
			return false;
		}
		return true;
	}

	private static bool IsSeasonal(IQuestInfo q)
	{
		if (q == null)
		{
			return false;
		}
		if (q.IsSeasonalQuest)
		{
			return true;
		}
		if (q.SeasonalQuestExpiry.HasValue)
		{
			return true;
		}
		if (q is UnlockLinkQuestInfo { QuestExpiry: not null })
		{
			return true;
		}
		return false;
	}
}