using System.Numerics;
using ChatTwo.Resources;
using ChatTwo.Ui.SettingsTabs;
using ChatTwo.Util;
using Dalamud.Interface.Utility.Raii;
using Dalamud.Interface.Windowing;
using Dalamud.Utility;
using Dalamud.Bindings.ImGui;

namespace ChatTwo.Ui;

public sealed class SettingsWindow : Window
{
    private readonly Plugin Plugin;

    private Configuration Mutable { get; }
    private List<ISettingsTab> Tabs { get; }
    private int CurrentTab;

    internal SettingsWindow(Plugin plugin) : base($"{Language.Settings_Title.Format(Plugin.PluginName)}###chat2-settings")
    {
        Flags = ImGuiWindowFlags.NoScrollbar | ImGuiWindowFlags.NoScrollWithMouse;

        SizeCondition = ImGuiCond.FirstUseEver;
        SizeConstraints = new WindowSizeConstraints
        {
            MinimumSize = new Vector2(475, 600),
            MaximumSize = new Vector2(float.MaxValue, float.MaxValue)
        };

        Plugin = plugin;
        Mutable = new Configuration();

        Tabs =
        [
            new Display(Mutable),
            new ChatLog(Plugin, Mutable),
            new Emote(Plugin, Mutable),
            new Preview(Mutable),
            new Fonts(Mutable),
            new ChatColours(Plugin, Mutable),
            new Tabs(Plugin, Mutable),
            new SettingsTabs.Privacy(Plugin, Mutable),
            new Database(Plugin, Mutable),
            new Webinterface(Plugin, Mutable),
            new Miscellaneous(Mutable),
            new Changelog(Mutable),
            new About()
        ];

        RespectCloseHotkey = false;
        DisableWindowSounds = true;

        Initialise();

        Plugin.Commands.Register("/chat2", "Perform various actions with Chat 2.").Execute += Command;
        Plugin.Interface.UiBuilder.OpenConfigUi += Toggle;
    }

    public void Dispose()
    {
        Plugin.Interface.UiBuilder.OpenConfigUi -= Toggle;
        Plugin.Commands.Register("/chat2").Execute -= Command;
    }

    private void Command(string command, string args)
    {
        if (string.IsNullOrWhiteSpace(args))
            Toggle();
    }

    private void Initialise()
    {
        Mutable.UpdateFrom(Plugin.Config, false);
    }

    public override void Draw()
    {
        if (ImGui.IsWindowAppearing())
            Initialise();

        using (var table = ImRaii.Table("##chat2-settings-table", 2))
        {
            if (table.Success)
            {
                ImGui.TableSetupColumn("tab", ImGuiTableColumnFlags.WidthFixed);
                ImGui.TableSetupColumn("settings", ImGuiTableColumnFlags.WidthStretch);

                ImGui.TableNextColumn();

                var changed = false;
                for (var i = 0; i < Tabs.Count; i++)
                {
                    if (!ImGui.Selectable($"{Tabs[i].Name}###tab-{i}", CurrentTab == i))
                        continue;

                    CurrentTab = i;
                    changed = true;
                }

                ImGui.TableNextColumn();

                var style = ImGui.GetStyle();
                var height = ImGui.GetContentRegionAvail().Y - style.FramePadding.Y * 2 - style.ItemSpacing.Y - style.ItemInnerSpacing.Y * 2 - ImGui.CalcTextSize("A").Y;

                using var child = ImRaii.Child("##chat2-settings", new Vector2(-1, height));
                if (child.Success)
                    Tabs[CurrentTab].Draw(changed);
            }
        }

        ImGui.Separator();

        var save = ImGui.Button(Language.Settings_Save);

        ImGui.SameLine();

        if (ImGui.Button(Language.Settings_SaveAndClose)) {
            save = true;
            IsOpen = false;
        }

        ImGui.SameLine();

        if (ImGui.Button(Language.Settings_Discard)) {
            IsOpen = false;
        }

        const string buttonLabel = "Anna's Ko-fi";
        const string buttonLabel2 = "Infi's Ko-fi";

        using (ImRaii.PushColor(ImGuiCol.Button, ColourUtil.RgbaToAbgr(0xFF5E5BFF)))
        using (ImRaii.PushColor(ImGuiCol.ButtonHovered, ColourUtil.RgbaToAbgr(0xFF7775FF)))
        using (ImRaii.PushColor(ImGuiCol.ButtonActive, ColourUtil.RgbaToAbgr(0xFF4542FF)))
        using (ImRaii.PushColor(ImGuiCol.Text, 0xFFFFFFFF))
        {
            var buttonWidth = ImGui.CalcTextSize(buttonLabel).X + ImGui.GetStyle().FramePadding.X * 2;
            var buttonWidth2 = ImGui.CalcTextSize(buttonLabel2).X + ImGui.GetStyle().FramePadding.X * 2;
            ImGui.SameLine(ImGui.GetContentRegionAvail().X - buttonWidth - buttonWidth2);

            if (ImGui.Button(buttonLabel2))
                Dalamud.Utility.Util.OpenLink("https://ko-fi.com/infiii");

            ImGui.SameLine();

            if (ImGui.Button(buttonLabel))
                Dalamud.Utility.Util.OpenLink("https://ko-fi.com/lojewalo");
        }

        if (!save)
            return;

        // calculate all conditions before updating config
        var hideChanged = !Mutable.HideChat && Mutable.HideChat != Plugin.Config.HideChat;
        var languageChanged = Mutable.LanguageOverride != Plugin.Config.LanguageOverride;
        var fontChanged = Mutable.GlobalFontV2 != Plugin.Config.GlobalFontV2
                          || Mutable.JapaneseFontV2 != Plugin.Config.JapaneseFontV2
                          || Mutable.ItalicFontV2 != Plugin.Config.ItalicFontV2
                          || Mutable.ExtraGlyphRanges != Plugin.Config.ExtraGlyphRanges;
        var fontSizeChanged = Math.Abs(Mutable.SymbolsFontSizeV2 - Plugin.Config.SymbolsFontSizeV2) > 0.001
                          || Math.Abs(Mutable.FontSizeV2 - Plugin.Config.FontSizeV2) > 0.001;
        var italicStateChanged = Mutable.ItalicEnabled != Plugin.Config.ItalicEnabled;

        Plugin.Config.UpdateFrom(Mutable, true);

        // save after 60 frames have passed, which should hopefully not
        // commit any changes that cause a crash
        Plugin.DeferredSaveFrames = 60;
        Plugin.MessageManager.ClearAllTabs();
        Plugin.MessageManager.FilterAllTabsAsync();

        if (fontChanged || fontSizeChanged || italicStateChanged)
            Plugin.FontManager.BuildFonts();

        if (languageChanged)
            Plugin.LanguageChanged(Plugin.Interface.UiLanguage);

        if (hideChanged)
            GameFunctions.GameFunctions.SetChatInteractable(true);

        if (Plugin.Config.ShowEmotes)
            Task.Run(EmoteCache.LoadData);

        Initialise();
    }
}