using Dalamud.Hooking;
using Dalamud.Utility.Signatures;

namespace Screenie;

internal unsafe class NoUi : IDisposable {
    private delegate void TextureCreateDelegate(nint* a1, nint* a2);
    private delegate nint TexturesCreateDelegate(nint a1);
    private delegate nint TexturesRecreateDelegate(nint a1);

    [Signature("40 55 53 57 41 56 41 57 48 8D AC 24 ?? ?? ?? ?? B8", DetourName = nameof(TextureCreateDetour))]
    private Hook<TextureCreateDelegate>? _textureCreateHook;

    [Signature("40 55 53 56 57 41 55 48 8B EC 48 83 EC 60 48 8B 35", DetourName = nameof(TexturesCreateDetour))]
    private Hook<TexturesCreateDelegate>? _texturesCreateHook;

    [Signature("40 55 53 41 55 48 8B EC 48 83 EC 50", DetourName = nameof(TexturesRecreateDetour))]
    private Hook<TexturesRecreateDelegate>? _texturesRecreateHook;

    private Plugin Plugin { get; }

    private bool _enabled;

    private nint* _ffxivTexture = null;
    private nint _ffxivRecreationStruct = 0;
    private nint _ffxivCreationStruct = 0;

    internal NoUi(Plugin plugin) {
        this.Plugin = plugin;
        this.Plugin.GameInteropProvider.InitializeFromAttributes(this);

        if (
            this._textureCreateHook == null
            || this._texturesCreateHook == null
            || this._texturesRecreateHook == null
        ) {
            Plugin.Log.Warning("could not create texture hook(s), disabling noui");
            return;
        }

        this._textureCreateHook.Enable();
        this._texturesCreateHook.Enable();
        this._texturesRecreateHook.Enable();

        this._enabled = true;
    }

    public void Dispose() {
        this._enabled = false;

        this._texturesRecreateHook?.Dispose();
        this._texturesCreateHook?.Dispose();
        this._textureCreateHook?.Dispose();
    }

    private void TextureCreateDetour(nint* a1, nint* a2) {
        Plugin.Log.Info(nameof(TextureCreateDetour));
        this._ffxivTexture = a1;

        this._textureCreateHook!.Original(a1, a2);

        this._ffxivTexture = null;
    }

    private nint TexturesCreateDetour(nint a1) {
        Plugin.Log.Info(nameof(TexturesCreateDetour));
        this._ffxivCreationStruct = a1;
        // ffxiv_current_creation_index = -1;
        // ffxiv_created_resources.clear();

        var ret = this._texturesCreateHook!.Original(a1);

        this._ffxivCreationStruct = 0;

        return ret;
    }

    private nint TexturesRecreateDetour(nint a1) {
        Plugin.Log.Info(nameof(TexturesRecreateDetour));
        this._ffxivRecreationStruct = a1;

        var ret = this._texturesRecreateHook!.Original(a1);

        this._ffxivRecreationStruct = 0;

        return ret;
    }

    internal void GetNoUiBuffer() {
        if (!this._enabled) {
            return;
        }
    }
}