using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class PlayAni : MonoBehaviour
{
    [Header("按钮设置")]
    [SerializeField] private Button playAniButton;   // 播放动画按钮
    [SerializeField] private Button playVideoButton; // 播放视频按钮
    [SerializeField] private Slider progressSlider;  // 动画进度条

    [Header("动画物体")]
    [SerializeField] private Animator prefabAnimator; // 场景中直接拖拽的物体

    private bool isPlaying = false;
    private float animationLength; // 动画时长（秒）
    private float currentTime = 0f; // 当前播放时间

    void Start()
    {
        // 初始化按钮事件
        ButtonOnclick();

        if (prefabAnimator != null)
        {
            InitializeSlider();

            // 防止一开始自动播放
            prefabAnimator.Play(0, 0, 0);
            prefabAnimator.speed = 0;
            isPlaying = false;
        }
        else
        {
            progressSlider.gameObject.SetActive(false);
        }
    }

    void Update()
    {
        if (prefabAnimator == null) return;

        if (isPlaying)
        {
            currentTime += Time.deltaTime;

            if (currentTime > animationLength)
            {
                currentTime = animationLength;
                isPlaying = false;
            }

            float normalizedTime = currentTime / animationLength;
            prefabAnimator.Play(0, 0, normalizedTime);

            progressSlider.SetValueWithoutNotify(normalizedTime * 100f);
        }
    }

    private void ButtonOnclick()
    {
        // 播放动画按钮
        playAniButton.onClick.RemoveAllListeners();
        playAniButton.onClick.AddListener(() =>
        {
            if (prefabAnimator == null) return;

            progressSlider.gameObject.SetActive(true); // 显示 Slider
            PlayPrefabAni();
        });

        // 播放视频按钮
        playVideoButton.onClick.RemoveAllListeners();
        playVideoButton.onClick.AddListener(() =>
        {
            ResetAnimationToStart();                   // 重置动画到 0 帧
            progressSlider.gameObject.SetActive(false); // 隐藏 Slider

        });
    }

    private void InitializeSlider()
    {
        if (progressSlider == null) return;

        progressSlider.minValue = 0;
        progressSlider.maxValue = 100;
        progressSlider.value = 0;

        // 获取动画时长
        AnimatorClipInfo[] clips = prefabAnimator.GetCurrentAnimatorClipInfo(0);
        animationLength = (clips.Length > 0) ? clips[0].clip.length : 0;

        // 添加拖动事件
        progressSlider.onValueChanged.RemoveAllListeners();
        progressSlider.onValueChanged.AddListener(OnSliderValueChanged);

        progressSlider.gameObject.SetActive(false); // 初始隐藏
    }

    private void PlayPrefabAni()
    {
        if (prefabAnimator == null) return;

        currentTime = 0f;
        isPlaying = true;
    }

    private void OnSliderValueChanged(float value)
    {
        if (prefabAnimator == null) return;

        float normalizedTime = value / 100f;
        currentTime = normalizedTime * animationLength;

        prefabAnimator.Play(0, 0, normalizedTime);
        prefabAnimator.speed = 0;
        isPlaying = false;
    }

    private void ResetAnimationToStart()
    {
        if (prefabAnimator == null) return;

        currentTime = 0f;
        isPlaying = false;
        prefabAnimator.Play(0, 0, 0); // 回到第一帧
        prefabAnimator.speed = 0;
        progressSlider.value = 0;
    }
}