using System;
using System.Collections;
using System.Collections.Generic;
using DG.Tweening;
using Sirenix.OdinInspector;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.Serialization;

namespace Ichni.UI
{
    public class UIPageBase : SerializedMonoBehaviour
    { 
        public CanvasGroup mainCanvasGroup;
        public UnityAction fadeInStartAction;
        public UnityAction fadeInFinishAction;
        public UnityAction fadeOutAction;

        protected virtual void Awake()
        {
            CanvasGroup group = GetComponent<CanvasGroup>();
            if (group != null)
            {
                mainCanvasGroup ??= group;
            }
        }

        /// <summary>
        /// 显示页面并播放淡入动画。
        /// <paramref name="beforeFadeAction"/> 在 Canvas 已激活、保持完全透明且输入仍被阻断时执行，
        /// 适用于需要先完成视口定位、动态布局或数据绑定，再让玩家看见页面的场景。
        /// </summary>
        public virtual void FadeIn(float duration = 0.5f, bool ignoreTimeScale = false,
            UnityAction action = null, UnityAction beforeFadeAction = null)
        {
            mainCanvasGroup.gameObject.SetActive(true);
            // 明确重置为不可见、不可交互状态，保证 beforeFadeAction 的任何布局变化都不会闪现在屏幕上。
            mainCanvasGroup.alpha = 0f;
            mainCanvasGroup.interactable = false;
            mainCanvasGroup.blocksRaycasts = false;
            fadeInStartAction?.Invoke();
            beforeFadeAction?.Invoke();
            
            Tweener fade = mainCanvasGroup.DOFade(1f, duration).OnComplete(() =>
            {
                mainCanvasGroup.interactable = true;
                mainCanvasGroup.blocksRaycasts = true;
                fadeInFinishAction?.Invoke();
                action?.Invoke();
            });
            
            if (ignoreTimeScale)
            {
                fade.SetUpdate(true);
            }
            
            fade.Play();
        }
        
        public virtual void FadeOut(float duration = 0.5f, bool ignoreTimeScale = false, UnityAction action = null)
        {
            mainCanvasGroup.interactable = false;
            mainCanvasGroup.blocksRaycasts = false;
            
            Tweener fade = mainCanvasGroup.DOFade(0f, duration).OnComplete(() =>
            {
                fadeOutAction?.Invoke();
                action?.Invoke();
                mainCanvasGroup.gameObject.SetActive(false);
            });
            
            if (ignoreTimeScale)
            {
                fade.SetUpdate(true);
            }
            
            fade.Play();
        }
    }
}