using Base;
using UnityEngine;

namespace Prefab
{
    [RequireComponent(typeof(SpriteRenderer))]
    public class ImagePrefab : MonoBehaviour
    {
        [Header("Display Settings")] [SerializeField]
        private Sprite _defaultSprite;

        [SerializeField] private Color _tintColor = Color.white;
        [SerializeField, Range(0, 1)] private float _alpha = 1f;
        [SerializeField] private bool _preserveAspect = true;

        private SpriteRenderer _renderer;
        private Vector2 _originalSize;
        private bool _isInitialized;

        public Sprite DisplayedSprite => _renderer.sprite;
        public Color CurrentColor => _renderer.color;

        private void Awake()
        {
            InitializeRenderer();
        }

        private void InitializeRenderer()
        {
            if (_isInitialized) return;

            _renderer = GetComponent<SpriteRenderer>();

            // 初始尺寸记录
            if (_defaultSprite != null)
            {
                _originalSize = new Vector2(
                    _defaultSprite.rect.width / _defaultSprite.pixelsPerUnit,
                    _defaultSprite.rect.height / _defaultSprite.pixelsPerUnit
                );
            }

            // 设置初始状态
            ApplyVisualSettings();
            _isInitialized = true;
        }

        private void ApplyVisualSettings()
        {
            if (!_isInitialized) InitializeRenderer();

            // 设置精灵和颜色
            _renderer.sprite = _defaultSprite;
            _renderer.color = new Color(_tintColor.r, _tintColor.g, _tintColor.b, _alpha);

            // 保持原始纵横比
            if (_preserveAspect && _defaultSprite != null)
            {
                MaintainAspectRatio();
            }
        }

        private void MaintainAspectRatio()
        {
            Vector2 currentSize = transform.lossyScale;
            float aspectRatio = _originalSize.x / _originalSize.y;

            if (currentSize.x == 0 || currentSize.y == 0) return;

            float currentAspect = currentSize.x / currentSize.y;

            if (Mathf.Abs(currentAspect - aspectRatio) > 0.01f)
            {
                Vector2 newScale = currentSize;
                if (currentAspect > aspectRatio)
                {
                    newScale.x = currentSize.y * aspectRatio;
                }
                else
                {
                    newScale.y = currentSize.x / aspectRatio;
                }

                transform.localScale = newScale;
            }
        }

        // 公共控制方法
        public void SetSprite(Sprite newSprite)
        {
            _defaultSprite = newSprite;
            if (_defaultSprite != null)
            {
                _originalSize = new Vector2(
                    _defaultSprite.rect.width / _defaultSprite.pixelsPerUnit,
                    _defaultSprite.rect.height / _defaultSprite.pixelsPerUnit
                );
            }

            ApplyVisualSettings();
        }

        public void SetColor(Color newColor)
        {
            _tintColor = newColor;
            ApplyVisualSettings();
        }

        public void SetAlpha(float newAlpha)
        {
            _alpha = Mathf.Clamp01(newAlpha);
            ApplyVisualSettings();
        }

        public void ToggleVisibility(bool isVisible)
        {
            if (!_isInitialized) InitializeRenderer();
            _renderer.enabled = isVisible;
        }

        public void SetSortingLayer(string layerName, int order)
        {
            if (!_isInitialized) InitializeRenderer();
            _renderer.sortingLayerName = layerName;
            _renderer.sortingOrder = order;
        }

#if UNITY_EDITOR
        private void OnValidate()
        {
            // 编辑器模式下实时预览变化
            if (UnityEditor.EditorApplication.isPlaying)
            {
                ApplyVisualSettings();
            }
            else if (GetComponent<SpriteRenderer>() != null)
            {
                GetComponent<SpriteRenderer>().sprite = _defaultSprite;
                GetComponent<SpriteRenderer>().color = new Color(_tintColor.r, _tintColor.g, _tintColor.b, _alpha);
            }
        }
#endif
    }
}