using System.Collections;
using AibisDream.Kit;
using AibisDream.Utility;
using DG.Tweening;
using UnityEngine;

namespace AibisDream
{
    public class SpriteShowcase : Singleton<SpriteShowcase>
    {
        [SerializeField] private SpriteRenderer _spriteRenderer;
        [SerializeField] private SpriteRenderer _backgroundSpriteRenderer;

        public override void OnSingletonInit()
        {            
            // 初始状态：隐藏
            _spriteRenderer.gameObject.SetActive(false);
            _spriteRenderer.SetAlpha(0);
        }

        /// <summary>
        /// 显示物体
        /// </summary>
        /// <param name="picName">图片名称（相对于 Resources/Art/Obj/ 的路径）</param>
        /// <returns>协程</returns>
        public IEnumerator ShowObj(string picName, float duration = 1)
        {
            _spriteRenderer.gameObject.SetActive(true);

            // 切换图片
            var newSprite = Resources.Load<Sprite>($"Art/Obj/{picName}");
            _spriteRenderer.sprite = newSprite;

            // 然后淡入
            yield return _spriteRenderer.DOFade(1, duration).WaitForCompletion();
        }

        /// <summary>
        /// 隐藏物体
        /// </summary>
        /// <returns>协程</returns>
        public IEnumerator HideObj(float duration = 1)
        {
            yield return _spriteRenderer.DOFade(0, duration).WaitForCompletion();
            _spriteRenderer.gameObject.SetActive(false);
        }

        /// <summary>
        /// 淡入（异步协程版本）
        /// </summary>
        /// <param name="duration">淡入时长</param>
        /// <returns>协程</returns>
        public IEnumerator FadeInAsync(float duration = 1)
        {
            if (_backgroundSpriteRenderer == null) yield break;
            
            _backgroundSpriteRenderer.gameObject.SetActive(true);
            yield return _backgroundSpriteRenderer.DOFade(1, duration).WaitForCompletion();
        }

        /// <summary>
        /// 淡出（异步协程版本）
        /// </summary>
        /// <param name="duration">淡出时长</param>
        /// <returns>协程</returns>
        public IEnumerator FadeOutAsync(float duration = 1)
        {
            if (_backgroundSpriteRenderer == null) yield break;
            
            _backgroundSpriteRenderer.gameObject.SetActive(true);
            yield return _backgroundSpriteRenderer.DOFade(0, duration).WaitForCompletion();
            _backgroundSpriteRenderer.gameObject.SetActive(false);
        }

        /// <summary>
        /// 淡入（同步版本，启动协程）
        /// </summary>
        /// <param name="duration">淡入时长</param>
        public void FadeInSync(float duration = 1)
        {
            StartCoroutine(FadeInAsync(duration));
        }

        /// <summary>
        /// 淡出（同步版本，启动协程）
        /// </summary>
        /// <param name="duration">淡出时长</param>
        public void FadeOutSync(float duration = 1)
        {
            StartCoroutine(FadeOutAsync(duration));
        }
    }
}