using System.Diagnostics;
using System.Reflection;
using HarmonyLib;
using JetBrains.Annotations;
using KSA;
using ModMenu;
using StarMap.API;

using static Brutal.Logging.DefaultCategory;

namespace OemLoader;

[UsedImplicitly]
[StarMapMod]
public class OemLoader
{
    public static OemLoader? Instance { get; private set; }
    
    public static readonly DateTime KsaEpoch = new(2025, 11, 30, 0, 0, 0);
    
    [PublicAPI]
    public readonly string Version;
    public readonly MainWindow Window;
    private static Harmony? _harmony = new("OemLoader");
    
    public OemLoader()
    {
        var version = typeof(OemLoader).Assembly
            .GetCustomAttribute<AssemblyInformationalVersionAttribute>()?
            .InformationalVersion;
        Debug.Assert(version is not null);
        Version = version;
        Window = new MainWindow($"OemLoader {Version}");

        if (Instance is null)
            Instance = this;
        else
            Log.Warning("OemLoader: created multiple mod instances");
    }
    
    [UsedImplicitly]
    [StarMapImmediateLoad]
    public void Init(Mod definingMod)
    {
        Log.Info($"OemLoader {Version} loaded");
    }

    [UsedImplicitly]
    [StarMapAllModsLoaded]
    public void FullyLoaded()
    {
        _harmony?.PatchAll(typeof(OemLoader).Assembly);
    }

    [UsedImplicitly]
    [StarMapUnload]
    public void Unload()
    {
        _harmony?.UnpatchAll("OemLoader");
        _harmony = null;
    }

    [UsedImplicitly]
    [ModMenuEntry("OemLoader")]
    public static void DrawMenu()
    {
        if (Instance is null) return;
        ImGuiHelper.DrawMenuItem("Ephemeris Loader", ref Instance.Window.Open);
    }
}