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

/// <summary>
/// 图像控制类
/// </summary>
public class ImagePlayerEx : MonoBehaviour
{
    public static ImagePlayerEx Instance;
   // public UnityWebRequest imgRequest;
    private void Awake()
    {
        Instance = this;
    }

    public Data info;

    /// <summary>
    /// BackImage的RectTransform组件
    /// </summary>
    public RectTransform rectBackImage;
    /// <summary>
    /// 图像
    /// </summary>
    public RawImage img;
    /// <summary>
    /// 音频播放图片
    /// </summary>
    public Sprite SpritePlay;
    /// <summary>
    /// 音频停止图片
    /// </summary>
    public Sprite SpriteStop;

    public Texture2D ErrorImage;
    /// <summary>
    /// 是否在播放
    /// </summary>
    bool isPlaying;
    /// <summary>
    /// 全屏按钮
    /// </summary>
    public Button btnFullscreen;
    /// <summary>
    /// 关闭按钮
    /// </summary>
    public Button btnClose;
    /// <summary>
    /// 关闭按钮
    /// </summary>
    public Button btnSound;
    /// <summary>
    /// 下一张图片按钮
    /// </summary>
    public Button btnNext;
    /// <summary>
    /// 上一张图片按钮
    /// </summary>
    public Button btnPriv;
    /// <summary>
    /// 放大图片按钮
    /// </summary>
    public Button btnLarge;
    /// <summary>
    /// 缩小图片按钮
    /// </summary>
    public Button btnSmall;
    /// <summary>
    /// 数据标题
    /// </summary>
    public Text txtTitle;
    /// <summary>
    /// 数据描述
    /// </summary>
    public Text txtDescription;
    /// <summary>
    /// 音乐名
    /// </summary>
    string soundName;

    int currentIndex = 0;
    float currentLarge = 1f;
    float maxLarge = 10f;
    float minLarge = 0.5f;

    public bool IsShow;
    Vector2 v2;

    Animator anim;

    void Start()
    {
        // 关联最大化、关闭、播放音频按钮事件
        if (btnFullscreen != null)
            btnFullscreen.onClick.AddListener(OnBtnFullScreenClick);
        if (btnClose != null)
            btnClose.onClick.AddListener(OnBtnCloseClick);
        if (btnSound != null)
            btnSound.onClick.AddListener(OnBtnSoundClick);
        if (btnNext != null)
            btnNext.onClick.AddListener(OnBtnNextClick);
        if (btnPriv != null)
            btnPriv.onClick.AddListener(OnBtnPrivClick);
        if (btnLarge != null)
            btnLarge.onClick.AddListener(OnBtnLargeClick);
        if (btnSmall != null)
            btnSmall.onClick.AddListener(OnBtnSmallClick);

        anim = GetComponent<Animator>();
    }

    /// <summary>
    /// 隐藏图像显示窗口
    /// </summary>
    public void HideImage()
    {
        // 还原为正常窗口
        if (isFullScreen)
            OnBtnFullScreenClick();

        if (info.IsType(DataType.Image) || info.IsType(DataType.MultiImage))
        {
            // 关闭
            if (anim != null)
                anim.SetTrigger("CloseBg");
        }
        else
        {
            HideComplete();
        }

        currentIndex = 0;
        currentLarge = 1f;
    }

    /// <summary>
    /// 动画结束隐藏对象、暂停音频播放、还原播放按钮图标
    /// </summary>
    void HideComplete()
    {
        // AudioManager.Instance.StopAudio();
        btnSound.GetComponent<Image>().sprite = SpritePlay;
        IsShow = false;
    }

    /// <summary>
    /// 显示图像
    /// </summary>
    /// <param name="data">图像数据</param>
    public void ShowImage(int index)
    {
        BaseController.CanControl = false;

        currentIndex = index;

        IsShow = true;
        currentLarge = 1f;

        //txtTitle.text = info.Title;
        //if (txtDescription != null)
        //{
        //    txtDescription.text = info.DataDetails[0];
        //}

        if (anim != null)
            anim.SetTrigger("OpenBg");

        if (string.IsNullOrEmpty(info.AudioName))
        {
            btnSound.gameObject.SetActive(false);   // 无音频则隐藏播放按钮
        }
        else
        {
            btnSound.gameObject.SetActive(true);    // 有音频则隐藏播放按钮
            soundName = info.AudioName;
            OnBtnSoundClick();
        }

        if (info.IsType(DataType.Image) || info.IsType(DataType.ImageText))
        {
            StartCoroutine(ImageLoader<RawImage>.LoadImage(CommonData.SpotImageFullPath + info.ImageName, img, ImageLoadCompleted));

            btnNext.gameObject.SetActive(false);
            btnPriv.gameObject.SetActive(false);
        }
        else
        {
            StartCoroutine(ImageLoader<RawImage>.LoadImage(CommonData.SpotImageFullPath + info.DataDetails[currentIndex], img, ImageLoadCompleted));

            ShowNextPrivButton();
        }
    }

    void ImageLoadCompleted(Texture2D tex, RawImage img)
    {
        img.texture = tex;
        if (tex == null)
        {
            img.texture = ErrorImage;
        }
        Dofit();
        img.rectTransform.sizeDelta *= currentLarge;


        img.color = Color.white;
        if (info.IsType(DataType.Image) || info.IsType(DataType.ImageText))
        {
            txtTitle.text = info.Title;
        }
        else
        {
            txtTitle.text = TipPointCollider.Instance.GetImageShow(info, currentIndex);
        }
        if (txtDescription != null)
        {
            txtDescription.text = info.DataDetails[0];
        }
    }


    /// <summary>
    /// 图像最大高度
    /// </summary>
    public float maxHeight = 520.0f;
    /// <summary>
    /// 图像最大宽度
    /// </summary>
    public float maxWidth = 1680.0f;

    /// <summary>
    /// 显示上半部分的默认宽度
    /// </summary>
    public float defaultWidth = 800.0f;

    /// <summary>
    /// 显示上半部分的比例值
    /// </summary>
    public float showTopScale = 2.0f;

    /// <summary>
    /// 图像太高时是否只显示上半部分
    /// </summary>
    public bool showTop = true;

    /// <summary>
    /// 图像自适应
    /// </summary>
    void Dofit()
    {
        float width, height;
        Texture tex = img.texture;
        float tw = tex.width;
        float th = tex.height;

        if ( showTop && th / tw > showTopScale)
        {
            width = defaultWidth;

            height = th * defaultWidth / tw;
        }
        else
        {
            width = maxWidth;
            height = th * maxWidth / tw;
            if (height > maxHeight)
            {
                height = maxHeight;
                width = tw * maxHeight / th;
            }
        }

        RectTransform tranImg = img.GetComponent<RectTransform>();
        tranImg.sizeDelta = new Vector2(width, height);
        tranImg.anchoredPosition = new Vector2(0, (maxHeight - height) / 2);
    }

    /// <summary>
    /// 播放｜暂停音频按钮单击
    /// </summary>
    public void OnBtnSoundClick()
    {
        isPlaying = !isPlaying;
        if (isPlaying)
        {
            if (soundName.Contains("."))
            {
                soundName = soundName.Substring(0, soundName.IndexOf("."));
            }

            //AudioManager.Instance.PlayAudio(soundName);
        }
        else
        {
            //AudioManager.Instance.StopAudio();
        }

        btnSound.GetComponent<Image>().sprite = isPlaying ? SpriteStop : SpritePlay;
    }

    /// <summary>
    /// 关闭按钮单击
    /// </summary>
    public void OnBtnCloseClick()
    {
        // ViewController.Instance.HideView();
        if (anim != null)
            anim.SetTrigger("CloseBg");

        img.texture = null;
        txtTitle.text = "";
        if (txtDescription != null)
        {
            txtDescription.text = "";
        }

        // BaseController.CanControl = true;
        // Invoke("SetControl", 0.2f);
        BtnController.Instance.SetCanControlDelay();

        img.color = Color.clear; 

        ImageLoader<RawImage>.ClearImage();
    }

    /// <summary>
    /// 是否全屏
    /// </summary>
    bool isFullScreen;

    /// <summary>
    /// 全屏按钮单击
    /// </summary>
    public void OnBtnFullScreenClick()
    {
        if (isFullScreen)
        {
            isFullScreen = false;
            rectBackImage.localScale = Vector3.one * 0.6f;
        }
        else
        {
            isFullScreen = true;
            rectBackImage.localScale = Vector3.one;
        }
    }

    public void OnBtnLargeClick()
    {
        currentLarge *= 1.1f;
        if (currentLarge > maxLarge)
        {
            currentLarge = maxLarge;
        }
        else
        {
            img.rectTransform.sizeDelta *= 1.1f;
        }
    }

    public void OnBtnSmallClick()
    {
        currentLarge /= 1.1f;
        if (currentLarge < minLarge)
        {
            currentLarge = minLarge;
        }
        else
        {
            img.rectTransform.sizeDelta /= 1.1f;
        }
    }

    void ShowNextPrivButton()
    {
        currentLarge = 1f;
        if (currentIndex == 0)
        {
            btnPriv.gameObject.SetActive(false);

            if (info.DataDetails.Length > 1)
            {
                btnNext.gameObject.SetActive(true);
            }
        }
        else if (currentIndex == info.DataDetails.Length - 1)
        {
            btnNext.gameObject.SetActive(false);

            if (info.DataDetails.Length > 1)
            {
                btnPriv.gameObject.SetActive(true);
            }
        }
        else
        {
            btnPriv.gameObject.SetActive(true);
            btnNext.gameObject.SetActive(true);
        }
    }

    public void OnBtnNextClick()
    {
        currentIndex++;
        if (currentIndex >= info.DataDetails.Length)
        {
            currentIndex = info.DataDetails.Length - 1;
        }
        ShowNextPrivButton();
        StartCoroutine(ImageLoader<RawImage>.LoadImage(CommonData.SpotImageFullPath + info.DataDetails[currentIndex], img, ImageLoadCompleted));
        // StartCoroutine("GetImage", info.DataDetails[currentIndex]);

        txtTitle.text = TipPointCollider.Instance.GetImageShow(info, currentIndex);
    }

    public void OnBtnPrivClick()
    {
        currentIndex--;
        if (currentIndex < 0)
        {
            currentIndex = 0;
        }
        ShowNextPrivButton();
        StartCoroutine(ImageLoader<RawImage>.LoadImage(CommonData.SpotImageFullPath + info.DataDetails[currentIndex], img, ImageLoadCompleted));
        // StartCoroutine("GetImage", info.DataDetails[currentIndex]);

        txtTitle.text = TipPointCollider.Instance.GetImageShow(info, currentIndex);
    }

    private Vector2 finger1Position;
    private Vector2 finger2Position;
    float scroll;
    public float scrollSpeed = 50f;

    void Update()
    {
       // if (imgRequest != null)
        {
           // Debug.Log($"{imgRequest.downloadProgress}");
        }
        if (!BaseController.CanControl)
        {
            if (Input.touchCount == 2)
            {
                Touch touch1 = Input.GetTouch(0);
                Touch touch2 = Input.GetTouch(1);

                // 更新手指位置
                finger1Position = touch1.position;
                finger2Position = touch2.position;

                // 计算当前手指距离和上一帧手指距离的差值，来计算缩放比例
                float distance = Vector2.Distance(finger1Position, finger2Position);
                float previousDistance = Vector2.Distance(finger1Position - touch1.deltaPosition, finger2Position - touch2.deltaPosition);
                scroll = (previousDistance - distance) / scrollSpeed;
            }
            else
            {
                scroll = Input.GetAxis("Mouse ScrollWheel");
            }

            // Debug.Log(scroll);

            if (scroll >= 0.1f)
            {
                OnBtnLargeClick();
            }
            else if (scroll <= -0.1f)
            {
                OnBtnSmallClick();
            }
        }
    }
}