using System.Collections;
using System.Collections.Generic;
using Sirenix.OdinInspector;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class AsyncLoad_Single: MonoBehaviour
{
    [Header("是否使用内置模式")]
    [SerializeField]
    private bool m_isUseBuiltinMode = true;
    
    [Header("基础熟悉设定")]
    [SerializeField]
    private Slider m_slider;

    /// <summary>
    /// 进度显示
    /// </summary>
    [SerializeField]
    private Text m_ProgressTxt;

    /// <summary>
    /// 文字显示
    /// </summary>
    [SerializeField]
    private Text m_txtDisplay;

    [SerializeField]
    private GameObject m_hintEffect;

    /// <summary>
    /// 加载速度
    /// </summary>
    [SerializeField]
    private float m_loadingSpeed = 1;

    /// <summary>
    /// 是否开始执行
    /// </summary>
    private bool m_isStart = false;
    
    /// <summary>
    /// 目标值
    /// </summary>
    private float m_targetValue;

    /// <summary>
    /// 当前进度
    /// </summary>
    private int m_currentProgress = 0;
    
    private AsyncOperation m_asyncOperation;

    public string m_SceneName;
    
    /// <summary>
    /// 初始化
    /// </summary>
    /// <param name="_sceneName"></param>
    /// <param name="_isStart"></param>
    public void Init(bool _isStart)
    {
        m_slider.value = 0;
        m_currentProgress = 0;
        m_isStart = false;
        
        if (m_isUseBuiltinMode)
        {
            if (_isStart)
            {
                StartCoroutine(AsyncLoadScene(m_SceneName, _isStart));
            }
        }
        else
        {
            StartCoroutine(LoadProgress(m_SceneName));
        }
    }

    #region 内置模式
    
    IEnumerator AsyncLoadScene(string _name,bool _isStart)
    {
        m_asyncOperation = SceneManager.LoadSceneAsync(_name);
        m_asyncOperation.allowSceneActivation = false;
        m_isStart = _isStart;

        yield return m_asyncOperation;
    }
    
    void FixedUpdate()
    {
        if (m_isStart)
        {
            Debug.Log("进入");
            m_targetValue = m_asyncOperation.progress;
            if (m_asyncOperation.progress >= 0.9f)
            {
                m_targetValue = 1.0f;
            }

            if (m_targetValue != m_slider.value)
            {
                m_slider.value = Mathf.Lerp(m_slider.value, m_targetValue, Time.deltaTime * m_loadingSpeed);
                if (Mathf.Abs(m_slider.value - m_targetValue) < 0.01f)
                {
                    m_slider.value = m_targetValue;
                }
            }

            m_ProgressTxt.text = ((int)(m_slider.value * 100)).ToString() + "%";
            if ((int)(m_slider.value * 100) == 100)
            {
                m_isStart = false;
                m_asyncOperation.allowSceneActivation = true;
            }
        }
    }
    #endregion

    /// <summary>
    /// 平滑加载
    /// </summary>
    /// <param name="_name"></param>
    private IEnumerator LoadProgress(string _name)
    {
        while (m_slider.value < 1f)
        {
            m_targetValue += m_loadingSpeed * Time.deltaTime;
            m_ProgressTxt.text = (int)(m_targetValue * 100) + "%";
            m_slider.value = Mathf.Clamp01(m_targetValue);
            
            yield return null;
        }

        if (m_slider.value == 1)
        {
            SetSubsequentOperations();
            SceneManager.LoadSceneAsync(_name);
        }
    }

    /// <summary>
    /// 设置模型状态
    /// </summary>
    private void SetSubsequentOperations()
    {
        m_txtDisplay.text = "资源加载完成";
        m_hintEffect.SetActive(false);
    }
}