using System;
using System.Collections;
using AibisDream.Framework;
using UnityEngine;
using UnityEngine.ResourceManagement.AsyncOperations;

namespace AibisDream
{
    internal static class Day2SleepSpriteLoader
    {
        private const string DreamSpritePath = "Sprite/梦境/{0}.png";

        public static string NormalizeName(string picName)
        {
            if (string.IsNullOrEmpty(picName)) return picName;
            return picName.EndsWith(".png", StringComparison.OrdinalIgnoreCase)
                ? picName.Substring(0, picName.Length - 4)
                : picName;
        }

        public static IEnumerator LoadInto(
            SpriteRenderer target,
            string picName,
            Action<bool> completed = null,
            Action<string> warning = null)
        {
            if (target == null)
            {
                completed?.Invoke(false);
                yield break;
            }

            var key = string.Format(DreamSpritePath, NormalizeName(picName));
            var handle = ResourceSystem.LoadAsync<Sprite>(key);
            yield return handle;
            if (handle.Status == AsyncOperationStatus.Succeeded && handle.Result != null)
            {
                target.sprite = handle.Result;
                completed?.Invoke(true);
                yield break;
            }

            var message = $"[Day2SleepPresentation] Failed to load sprite: {key}";
            Debug.LogError(message);
            warning?.Invoke(message);
            completed?.Invoke(false);
        }

        public static IEnumerator Load(
            string picName,
            Action<Sprite> completed,
            Action<string> warning = null)
        {
            var key = string.Format(DreamSpritePath, NormalizeName(picName));
            var handle = ResourceSystem.LoadAsync<Sprite>(key);
            yield return handle;
            if (handle.Status == AsyncOperationStatus.Succeeded && handle.Result != null)
            {
                completed?.Invoke(handle.Result);
                yield break;
            }

            var message = $"[Day2SleepPresentation] Failed to load sprite: {key}";
            Debug.LogError(message);
            warning?.Invoke(message);
            completed?.Invoke(null);
        }
    }
}