using System.Collections;

using System.Collections.Generic;

using System.IO;

using UnityEngine;

using UnityEngine.Networking;

using UnityEngine.UI;

using UnityEngine.Video;

public class Main:MonoBehaviour {

    private FileInfo[] files;

    public GameObject explain;

    public GameObject homePage;

    public GameObject allBtn;

    public GameObject showPic;

    public List<string> list = new List<string>();

    private int currentStep = 0;

    private int totalStep;

    public GameObject nextBtn;

    public GameObject prevBtn;

    public GameObject backBtn;

    public string standName;

    public VideoPlayer video;

    private string AndroidDirectory = "/storage/emulated/0/Android/";//安卓路径

    private string WindowsDirectory = System.Environment.CurrentDirectory + "/资源/";//Windows路径

    private string filePath;

    void Start() {

        explain.SetActive(false);

        explain.GetComponent<Image>().raycastTarget = false;

        if(Directory.Exists(WindowsDirectory)) {

            filePath = WindowsDirectory;

        } else if(Directory.Exists(AndroidDirectory)) {

            filePath = AndroidDirectory + "资源";

        } else {

            return;

        }

        for(int i = 0;i < allBtn.transform.childCount;i++) {

            GameObject obj = allBtn.transform.GetChild(i).gameObject;

            EventTriggerListener.Get(obj).onClick = onClick;

        }

        string homePath = filePath + "/" + standName + ".png";

        LoaderPic.LoadByIo(homePath,homePage);

        video.url = filePath + "/" + standName + ".mp4";

        string explainPath = filePath + "/" + standName + "弹框.png";

        LoaderPic.LoadByIo(explainPath,explain);

        EventTriggerListener.Get(nextBtn).onClick = onNext;

        EventTriggerListener.Get(prevBtn).onClick = onPrev;

        EventTriggerListener.Get(backBtn).onClick = onBack;

    }

    public Text txt;

    void onClick(GameObject sender) {

        string getPaths = filePath + "/图片" + sender.name;

        if(Directory.Exists(getPaths)) {//判断这个路径是否存在

            DirectoryInfo direction = new DirectoryInfo(getPaths);

            files = direction.GetFiles("*",SearchOption.AllDirectories);

        }

        list.Clear();

        for(int i = 0;i < files.Length;i++) {

            if(files[i].Name.EndsWith(".meta")) {

                continue;

            }

            list.Add(files[i].ToString());

        }

        totalStep = list.Count;

        showPic.SetActive(true);

        explain.SetActive(true);

        txt.text = "====" + list[currentStep].ToString();

        LoaderPic.LoadByIo(list[currentStep],showPic);

    }

    void onNext(GameObject sender) {

        currentStep++;

        if(currentStep >= totalStep) {

            currentStep = 0;

        }

       LoaderPic.LoadByIo(list[currentStep],showPic);

    }

    void onPrev(GameObject sender) {

        if(currentStep <= 0) {

            currentStep = totalStep;

        }

        currentStep--;

        LoaderPic.LoadByIo(list[currentStep],showPic);

    }

    void onBack(GameObject sender) {

        showPic.SetActive(false);

        explain.SetActive(false);

        list.Clear();

    }

    IEnumerator GetTexture(Image showPic, string url) {

        UnityWebRequest uwr = UnityWebRequest.Get(url);

        DownloadHandlerTexture downloadTexture = new DownloadHandlerTexture(true);

        uwr.downloadHandler = downloadTexture;

        yield return uwr.SendWebRequest();

        if(uwr.isNetworkError || uwr.isHttpError) {

            print(uwr.error);

        } else {

            Texture2D t = downloadTexture.texture;

            showPic.sprite = Sprite.Create(t,new Rect(0,0,t.width,t.height),Vector2.one);

        }

    }

}