using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Video;
/* 教程界面（主界面功能） */
public class VideoView : MonoBehaviour, MenuBackInterface
{
    GameObject videoBG;
    RawImage videoBox;
    VideoPlayer videoPlayer;
    GameObject btnVideoPlay;
    Button btnVideoBack;
    GameObject bottom;
    Scrollbar progressBar;

    void Awake()
    {
        videoBG = transform.Find("VideoBG").gameObject;
        videoBox = videoBG.GetComponentInChildren<RawImage>();
        videoPlayer = videoBG.GetComponentInChildren<VideoPlayer>();
        btnVideoPlay = transform.Find("BtnPlay").gameObject;
        btnVideoBack = transform.Find("BtnBack").GetComponent<Button>();
        bottom = this.transform.Find("Bottom").gameObject;
        progressBar = bottom.transform.Find("Scrollbar").GetComponent<Scrollbar>();

        videoBG.GetComponent<Button>().onClick.AddListener(delegate() {
            if (videoPlayer.isPaused) {
                videoPlayer.Play();
            } else {
                videoPlayer.Pause();
            }
        });
        btnVideoBack.onClick.AddListener(delegate() {
            AudioMgr.ins.PlayBtn();
            Destroy(this.gameObject);
        });
        progressBar.onValueChanged.AddListener(delegate(float v) {
            double currentTime = v * videoPlayer.length;
            if (currentTime < 0.5) currentTime = 0.5;
            videoPlayer.time = currentTime;
            showVideoTime(currentTime, videoPlayer.length);
        });

        ShowUiForPause(false);
    }

    void Start()
    {
        PersistenHandler.ins?.menuBackCtr.views.Add(this);
    }
    void OnDestroy()
    {
        PersistenHandler.ins?.menuBackCtr.views.Remove(this);
    }
    public bool OnMenuBack() {
        Destroy(gameObject);
        return true;
    }

    float unpreparetime = 0;

    void Update() {
        if (videoPlayer.isPrepared) {
            if (videoPlayer.isPaused) {
                ShowUiForPause(true);
            } else {
                ShowUiForPause(false);
            }
        } else {
            //预备时间超时，则退出加载视频
            unpreparetime += Time.deltaTime;
            if (unpreparetime >= 6) {
                Destroy(this.gameObject);
            }
        }
        Texture videoTexture = videoPlayer.texture;
        if (videoTexture) {
            if (!videoBox.enabled) videoBox.enabled = true;
            videoBox.texture = videoTexture;
            if (videoPlayer.isPlaying) {
                progressBar.SetValueWithoutNotify(float.Parse((videoPlayer.time / videoPlayer.length).ToString()));
                showVideoTime();
            }
        } else {
            if (videoBox.enabled) videoBox.enabled = false;
        }
    }

    void ShowUiForPause(bool value)
    {
        btnVideoPlay.SetActive(value);
        btnVideoBack.gameObject.SetActive(value);
        bottom.SetActive(value);
    }

    void showVideoTime()
    {
        showVideoTime(videoPlayer.time, videoPlayer.length);
    }

    void showVideoTime(double t1, double t2) 
    {
        progressBar.GetComponentInChildren<Text>().text = toTimeStr(t1) + " / " + toTimeStr(t2);
    }

    string toTimeStr(double time)
    {
        string str = "";
        int hour = (int)(time / 3600);
        if (hour < 10) str += "0";
        str += hour + ":";
        int min = (int)(time % 3600 / 60);
        if (min < 10) str += "0";
        str += min + ":";
        int sec = (int)(time % 60);
        if (sec < 10) str += "0";
        str += sec;
        return str;
    }

    public string url {
        set {
           this.videoPlayer.url = value; 
        } 
    }
}