using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using Dalamud.Bindings.ImGui;
using Dalamud.Interface;
using Dalamud.Interface.Utility.Raii;
using Dalamud.Interface.Windowing;
using Dalamud.Plugin;
using Questionable.Data;
using Questionable.Model.Changelog;
using Questionable.Windows.ChangelogComponents;

namespace Questionable.Windows;

internal sealed class ChangelogWindow : ThemedWindow
{
	private readonly Configuration _configuration;

	private readonly IDalamudPluginInterface _pluginInterface;

	private readonly ChangelogHeaderComponent _headerComponent;

	private readonly ChangelogFooterComponent _footerComponent;

	private int _windowOpenCount;

	private bool _hasSetInitialState;

	private float _headerAnimationTime;

	public ChangelogWindow(Configuration configuration, IDalamudPluginInterface pluginInterface)
		: base("Questionable Changelog###QuestionableChangelog", ImGuiWindowFlags.NoTitleBar)
	{
		_configuration = configuration;
		_pluginInterface = pluginInterface;
		_headerComponent = new ChangelogHeaderComponent();
		_footerComponent = new ChangelogFooterComponent();
		base.Size = new Vector2(900f, 650f);
		base.SizeCondition = ImGuiCond.FirstUseEver;
		base.SizeConstraints = new WindowSizeConstraints
		{
			MinimumSize = new Vector2(700f, 500f),
			MaximumSize = new Vector2(float.MaxValue, float.MaxValue)
		};
	}

	public override void DrawContent()
	{
		_headerComponent.Draw(delegate(bool isOpen)
		{
			if (!isOpen)
			{
				RequestClose();
			}
		});
		DrawChangelogEntries();
		ChangelogFooterComponent.Draw(base.RequestClose);
		ImDrawListPtr windowDrawList = ImGui.GetWindowDrawList();
		Vector2 windowPos = ImGui.GetWindowPos();
		Vector2 windowSize = ImGui.GetWindowSize();
		Vector2 pMax = windowPos + windowSize;
		Vector4 accentColor = UiThemeUtils.AccentColor;
		accentColor.W = 0.3f;
		windowDrawList.AddRect(windowPos, pMax, ImGui.ColorConvertFloat4ToU32(accentColor), 0f, ImDrawFlags.None, 2f);
	}

	public override void OnOpen()
	{
		base.OnOpen();
		_windowOpenCount++;
		_hasSetInitialState = false;
		_headerAnimationTime = 0f;
		_headerComponent.Reset();
	}

	public override void OnClose()
	{
		base.OnClose();
		MarkAllAsRead();
	}

	private void DrawChangelogEntries()
	{
		_headerAnimationTime += ImGui.GetIO().DeltaTime;
		float num = ImGui.GetFrameHeightWithSpacing() + ImGui.GetStyle().ItemSpacing.Y * 2f;
		using ImRaii.ChildDisposable childDisposable = ImRaii.Child("ChangelogScroll", new Vector2(0f, 0f - num), border: false, ImGuiWindowFlags.NoScrollbar);
		if (!childDisposable)
		{
			return;
		}
		using ImRaii.ChildDisposable childDisposable2 = ImRaii.Child("ChangelogScrollInner", Vector2.Zero, border: false);
		if (!childDisposable2)
		{
			return;
		}
		List<ChangelogEntry> changelogs = ChangelogData.Changelogs;
		ChangelogEntry changelogEntry = changelogs.FirstOrDefault();
		if (changelogs.Count == 0)
		{
			ImGui.SetCursorPosY(ImGui.GetCursorPosY() + 40f);
			UiThemeUtils.EmptyState(FontAwesomeIcon.FileAlt, "No changelog entries available.");
			return;
		}
		ChangelogEntryComponent changelogEntryComponent = new ChangelogEntryComponent(_configuration, _windowOpenCount, _headerAnimationTime);
		foreach (ChangelogEntry item in changelogs)
		{
			changelogEntryComponent.Draw(item, item == changelogEntry, _hasSetInitialState);
			Vector2 cursorScreenPos = ImGui.GetCursorScreenPos();
			float num2 = ImGui.GetContentRegionAvail().X * 0.5f;
			float num3 = (ImGui.GetContentRegionAvail().X - num2) * 0.5f;
			ImDrawListPtr windowDrawList = ImGui.GetWindowDrawList();
			Vector2 p = cursorScreenPos + new Vector2(num3, 0f);
			Vector2 p2 = cursorScreenPos + new Vector2(num3 + num2, 0f);
			Vector4 accentColor = UiThemeUtils.AccentColor;
			accentColor.W = 0.1f;
			windowDrawList.AddLine(p, p2, ImGui.ColorConvertFloat4ToU32(accentColor), 1f);
			ImGui.SetCursorPosY(ImGui.GetCursorPosY() + 4f);
		}
		_hasSetInitialState = true;
	}

	private void MarkAllAsRead()
	{
		string text = ChangelogData.Changelogs.FirstOrDefault()?.Version;
		if (text != null)
		{
			_configuration.LastViewedChangelogVersion = text;
			_pluginInterface.SavePluginConfig(_configuration);
		}
	}
}