using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using Cysharp.Threading.Tasks;
using System.Threading;
using System.IO;
using UnityEngine.U2D;
using UnityEngine.UI;


public class UILoader
{

    // ====================================================================
    // US2: Async UniTask variants
    // ====================================================================

    public static async UniTask LoadSprite(string directory, string name, Image image)
    {
        var sprite = await LoadSpriteAsync(directory, name);
        if (null != sprite)
        {
            if (image != null)
            {
                image.overrideSprite = sprite;
            }
        }
    }

    public static async UniTask LoadSprite(string directory, string name, Image image, string failureName)
    {
        var sprite = await LoadSpriteAsync(directory, name);
        if (image == null) return;
        if (sprite != null)
        {
            image.overrideSprite = sprite;
        }
        else
        {
            image.SetSprite(failureName);
        }
    }

    public static UniTask<GameObject> LoadWindowAsync(string name, CancellationToken ct = default)
    {
        return ResManager.Instance.LoadAssetAsync<GameObject>(ResourcesPath.UI_WINDOW_SUFFIX, name, ct: ct);
    }

    public static UniTask<GameObject> LoadPrefabAsync(string _name, CancellationToken ct = default)
    {
        return ResManager.Instance.LoadAssetAsync<GameObject>(ResourcesPath.UI_PREFAB_SUFFIX, _name, ct: ct);
    }

    public static async UniTask<Sprite> LoadSpriteAsync(string _iconKey, CancellationToken ct = default)
    {
        var iconConfig = IconConfig.Get(_iconKey);
        if (iconConfig == null) return null;
        return await LoadSpriteAsync(iconConfig.folder, iconConfig.sprite, ct);
    }

    public static UniTask<Sprite> LoadSpriteAsync(string _folder, string _file, CancellationToken ct = default)
    {
        return ResManager.Instance.LoadAssetAsync<Sprite>(
            StringUtility.Concat(ResourcesPath.UI_SPRITE_SUFFIX, "/", _folder), _file, ct: ct);
    }

    public static UniTask<Font> LoadFontAsync(string _fontName, CancellationToken ct = default)
    {
        return ResManager.Instance.LoadAssetAsync<Font>(ResourcesPath.UI_FONT_SUFFIX, _fontName, ct: ct);
    }

    public static async UniTask<Texture2D> LoadTexture2DAsync(string _iconKey, CancellationToken ct = default)
    {
        var iconConfig = IconConfig.Get(_iconKey);
        if (iconConfig == null) return null;
        return await ResManager.Instance.LoadAssetAsync<Texture2D>(
            StringUtility.Concat(ResourcesPath.UI_TEXTURE_SUFFIX, "/" + iconConfig.folder), iconConfig.sprite, ct: ct);
    }

    public static async UniTask<Texture2D> LoadTexture2DPNGAsync(string name, CancellationToken ct = default)
    {
        var path = StringUtility.Concat(ResourcesPath.UI_TEXTURE_SUFFIX, "/FullScreenBg");
        var result = await ResManager.Instance.LoadAssetAsync<Texture2D>(path, name + ".png", false, ct);
        return result;
    }
}