using UnityEngine;
using UnityEngine.UI;
using DG.Tweening;
using Yarn.Unity;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;
using System.Collections;

public class ScreenEffectManager : MonoBehaviour
{
    public static ScreenEffectManager Instance { get; private set; }

    public Image blackoutPanel; // 黑屏面板
    public Image redFlashPanel; // 红色闪烁面板
    private float shakeDuration = 0.5f; // 震屏持续时间
    private float shakeIntensity = 0.04f; // 震屏强度

    public Volume saturation;

    private ColorAdjustments colorAdjustments;

    private Vector3 originalCameraPosition;

    private void Awake()
    {
        // 确保单例模式
        if (Instance != null && Instance != this)
        {
            Destroy(gameObject);
        }
        else
        {
            Instance = this;
            DontDestroyOnLoad(gameObject); // 可选：保持在场景加载之间
        }
    }

    private void Start()
    {
        // 保存初始相机位置
        originalCameraPosition = Camera.main.transform.localPosition;
        // 获取 ColorAdjustments 设置
        if (saturation.profile.TryGet(out colorAdjustments))
        {
            Debug.Log("ColorAdjustments is available.");
        }
        else
        {
            Debug.LogError("ColorAdjustments settings not found in PostProcessProfile.");
        }
    }

    // 震屏效果
    [YarnCommand("shakeScreen")]
    public IEnumerator ShakeScreen()
    {
        yield return Camera.main.transform.DOPunchPosition(new Vector3(1, 0, 0) * shakeIntensity, shakeDuration, 8, 1f)
            .WaitForCompletion();
    }

    // 黑屏淡入淡出效果
    [YarnCommand("fadeIn")]
    public IEnumerator FadeIn(float duration)
    {
        blackoutPanel.gameObject.SetActive(true);
        Sequence fadeInSequence = DOTween.Sequence();
        fadeInSequence.Append(blackoutPanel.DOFade(1f, duration));
        //fadeInSequence.AppendInterval(waitTime);
        yield return fadeInSequence.WaitForCompletion();
    }

    [YarnCommand("fadeOut")]
    public IEnumerator FadeOut(float duration)
    {
        Sequence fadeOutSequence = DOTween.Sequence();
        fadeOutSequence.Append(blackoutPanel.DOFade(0f, duration).OnComplete(() =>
        {
            blackoutPanel.gameObject.SetActive(false);
        }));
        yield return fadeOutSequence.WaitForCompletion();
    }

    // 红色闪烁效果
    [YarnCommand("flashRed")]
    public IEnumerator FlashRed(float duration)
    {
        redFlashPanel.gameObject.SetActive(true);
        yield return redFlashPanel.DOFade(1, duration / 2).WaitForCompletion();
        yield return redFlashPanel.DOFade(0, duration / 2).OnComplete(() =>
        {
            redFlashPanel.gameObject.SetActive(false);
        }).WaitForCompletion();
    }

    // 动态调整饱和度
    public Tween TweenSaturation(float targetSaturation, float duration)
    {
        if (colorAdjustments != null)
        {
            // 使用 DOTween 创建一个饱和度过渡动画
            Tween tween = DOTween.To(
                () => colorAdjustments.saturation.value, // 获取当前饱和度值
                x => colorAdjustments.saturation.value = x, // 设置新的饱和度值
                targetSaturation, // 目标饱和度值
                duration // 过渡持续时间
            );

            return tween; // 返回 Tween 对象
        }
        else
        {
            Debug.LogError("ColorAdjustments settings not found.");
            return null; // 如果找不到设置，返回 null
        }
    }
}