using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using TMPro;
using static InterfaceManager;
using DG.Tweening;
using System.IO;
using Newtonsoft.Json;
using static MainCanvasManager;

/// <summary>
/// 课程目标面板
/// </summary>
public class ObjectivePanel : PanelBasic
{
    /// <summary>
    /// 目标描述
    /// </summary>
    public TextMeshProUGUI objective_description_text;
    /// <summary>
    /// 提交要求
    /// </summary>
    public TextMeshProUGUI submission_requirement_text;

    /// <summary>
    /// 任务目标数据
    /// </summary>
    public class ObjectiveData
    {
        /// <summary>
        /// 目标描述
        /// </summary>
        public string objective_description;
        /// <summary>
        /// 提交要求
        /// </summary>
        public string submission_requirement;
        /// <summary>
        /// 图片素材地址
        /// </summary>
        public string[] image_urls;
        /// <summary>
        /// 视频素材地址
        /// </summary>
        public string[] video_urls;
    }

    public ObjectiveData objective_data;
    /// <summary>
    /// 媒体预制体
    /// </summary>
    public MediaItem objective_media_prefab;
    /// <summary>
    /// 上一个媒体按钮
    /// </summary>
    public Button media_last_button;
    /// <summary>
    /// 下一个媒体按钮
    /// </summary>
    public Button media_next_button;
    /// <summary>
    /// 确认按钮
    /// </summary>
    public Button objective_confirm_button;
    /// <summary>
    /// 媒体容器
    /// </summary>
    public RectTransform objective_media_content;
    /// <summary>
    /// 使用中的Item列表
    /// </summary>
    private List<MediaItem> using_media_list = new List<MediaItem>();
    /// <summary>
    /// 当前媒体浏览滑动位置
    /// </summary>
    public int current_media_index;

    protected override void Awake()
    {
        base.Awake();
    }

    private void Start()
    {
        objective_confirm_button.onClick.AddListener(OnObjectiveConfirm);
        media_last_button.onClick.AddListener(OnLastMedia);
        media_next_button.onClick.AddListener(OnNextMedia);

        //var _url = Path.Combine(Application.streamingAssetsPath, "LocalConfig/Objective.txt");
        //StartCoroutine(Get(_url, (_data) =>
        //{
        //    objective_data = JsonConvert.DeserializeObject<ObjectiveData>(_data);
        //    Init(objective_data);
        //}));

        //初始化
        ObjectiveData data = new ObjectiveData();
        data.objective_description = task_panel.task_item_data.task_description;
        data.submission_requirement = "等待配置";
        List<string> tmpPicts=new List<string>();
        List<string> tmpvideos = new List<string>();
        task_panel.task_item_data.task_picturelist.ForEach(item => 
        {
            if(!string.IsNullOrEmpty(item.fileurl))
            {
                if (item.type == 1)
                {
                    //图片
                    tmpPicts.Add(item.fileurl);
                }
                else
                {
                    //视频
                    tmpvideos.Add(item.fileurl);
                }
            }
        });
        data.image_urls = tmpPicts.ToArray();
        data.video_urls = tmpvideos.ToArray();
        Init(data);
    }

    public void Init(ObjectiveData _objective_data)
    {
        objective_data = _objective_data;

        objective_description_text.text = "\t" + objective_data.objective_description;
        submission_requirement_text.text = "\t" + objective_data.submission_requirement;

        for (int i = 0; i < _objective_data.image_urls.Length; i++)
        {
            GetImage(_objective_data.image_urls[i]);
        }

        for (int i = 0; i < _objective_data.video_urls.Length; i++)
        {
            GetVideo(_objective_data.video_urls[i]);
        }

        if (_objective_data.image_urls.Length + _objective_data.video_urls.Length > 1)
        {
            media_last_button.gameObject.SetActive(true);
            media_next_button.gameObject.SetActive(true);
        }
    }

    /// <summary>
    /// 面板关闭事件
    /// </summary>
    public void OnObjectiveConfirm()
    {
        OnNagetive();

        //图片状态恢复
        objective_media_content.anchoredPosition = Vector2.zero;
        current_media_index = 0;
    }
    /// <summary>
    /// 上一个媒体
    /// </summary>
    public void OnLastMedia()
    {
        if (current_media_index > 0)
            current_media_index--;

        objective_media_content.DOAnchorPos(new Vector2(-current_media_index * (objective_media_content.rect.width + 5), 0), 0.25f);
    }
    /// <summary>
    /// 下一个媒体
    /// </summary>
    public void OnNextMedia()
    {
        if (current_media_index < using_media_list.Count - 1)
            current_media_index++;

        objective_media_content.DOAnchorPos(new Vector2(-current_media_index * (objective_media_content.rect.width + 5), 0), 0.25f);
    }
    /// <summary>
    /// 获取图片
    /// </summary>
    /// <param name="_url"></param>
    public void GetImage(string _url)
    {
        if (objective_media_prefab == null) objective_media_prefab = Resources.Load<MediaItem>("Prefabs/UIItem/MediaItem");
        StartCoroutine(GetSprite(_url, (_sprite) =>
        {
            var _item = GetItem();
            _item.InitImage(_sprite);
            using_media_list.Add(_item);
        }));
    }
    /// <summary>
    /// 获取视频
    /// </summary>
    /// <param name="_url"></param>
    public void GetVideo(string _url)
    {

    }


    /// <summary>
    /// 获取
    /// </summary>
    /// <returns></returns>
    public MediaItem GetItem()
    {
        MediaItem _item = Instantiate(objective_media_prefab, objective_media_content);
        return _item;
    }
}