using System.Collections;
using System.Collections.Generic;
using System.IO;
using DG.Tweening;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.Networking;
using UnityEngine.UI;

public class ZX8Controller : MonoBehaviour
{
    public static ZX8Controller Instance;

    private void Awake()
    {
        Instance = this;
    }

    /// <summary>
    /// 数据文件
    /// </summary>
    public string DataFileName = "Books.json";
    /// <summary>
    /// 书籍字典
    /// Key:书籍名称，Value:总页数
    /// </summary>
    public Dictionary<string, int> dicBooks;
    /// <summary>
    /// 图片路径
    /// </summary>
    string ImagePath;
    /// <summary>
    /// 书籍Book组件
    /// </summary>
    public Book bookContents;
    /// <summary>
    /// 书籍预设体
    /// </summary>
    public GameObject preBook1;

    /// <summary>
    /// 书籍预设体
    /// </summary>
    public GameObject preBook2;

    /// <summary>
    /// 书籍生成所在父对象
    /// </summary>
    public Transform bookParent;
    /// <summary>
    /// 书籍标题Text
    /// </summary>
    public Text txtTitle;
    /// <summary>
    /// 关闭按钮
    /// </summary>
    public Button btnClose;

    /// <summary>
    /// 显示选项按钮
    /// </summary>
    public Button btnShowOp;

    public Sprite spShowOp1;
    public Sprite spShowOp2;

    public Animator anim;

    string basePath;

    void Start()
    {
        basePath = CommonData.DataServer + "/ZX8/";

        StartCoroutine(JsonLoader.LoadJSON(basePath + "Data/" + DataFileName, OnGetBookListCompleted));

        if (btnClose != null)
            btnClose.onClick.AddListener(OnBtnCloseClick);

        if (btnShowOp != null)
            btnShowOp.onClick.AddListener(OnBtnShowOpClick);
    }

    /// <summary>
    /// 获取书籍列表结束
    /// </summary>
    public void OnGetBookListCompleted(string data)
    {
        dicBooks = JsonTools.DicFromJson<string, int>(data);
        InitialBooks1();

        #region
        //dicBooks = new Dictionary<string, int>();
        //dicBooks.Add("白鹿原", 7);
        //dicBooks.Add("红与黑", 7);
        //dicBooks.Add("狂人日记", 5);
        //dicBooks.Add("年轮", 4);

        //string data = JsonTools.DicToJson(dicBooks);
        //StreamWriter writer = File.CreateText(DataFileName);
        //writer.Write(data);
        //writer.Close();
        #endregion
    }

    /// <summary>
    /// 初始化书籍列表
    /// </summary>
    void InitialBooks1()
    {
        foreach (Transform child in bookParent)
        {
            Destroy(child.gameObject);
        }

        int i = 0;
        // 遍历所有的书籍
        foreach (string key in dicBooks.Keys)
        {
            // 创建书籍对象，并初始化名称、位置及封面（0.jpg)
            GameObject obj = Instantiate(preBook1, bookParent);
            obj.name = key;
            obj.transform.position -= Vector3.up * i * 280f;
            StartCoroutine(
                ImageLoader<Image>.LoadImage(
                    string.Format("{0}Books/{1}/{2}.jpg", basePath, key, 0),
                    obj.transform.GetChild(0).GetComponent<Image>()));
            obj.transform.GetChild(0).GetComponent<Button>().onClick.AddListener(OnImageBookClick);
            obj.transform.GetChild(1).GetComponent<Text>().text = key;

            if (currentSelect != null && key == currentSelect.name)
            {
                obj.GetComponent<Image>().color = Color.gray;
                obj.transform.GetChild(1).GetComponent<Text>().color = Color.black;
                obj.transform.GetChild(1).GetComponent<Text>().fontStyle = FontStyle.Bold;
                currentSelect = obj;
            }
        }
    }
    /// <summary>
    /// 初始化书籍列表
    /// </summary>
    void InitialBooks2()
    {
        foreach (Transform child in bookParent)
        {
            Destroy(child.gameObject);
        }

        int i = 0;
        // 遍历所有的书籍
        foreach (string key in dicBooks.Keys)
        {
            // 创建书籍对象，并初始化名称、位置及封面（0.jpg)
            GameObject obj = Instantiate(preBook2, bookParent);
            obj.name = key;
            obj.transform.position -= Vector3.up * i * 280f;
            StartCoroutine(
                ImageLoader<Image>.LoadImage(
                    string.Format("{0}Books/{1}/{2}.jpg", basePath, key, 0),
                    obj.transform.GetChild(0).GetComponent<Image>()));
            obj.transform.GetChild(1).GetComponent<Text>().text = key;
            obj.transform.GetChild(1).GetComponent<Button>().onClick.AddListener(OnImageBookClick);

            if (currentSelect != null && key == currentSelect.name)
            {
                obj.GetComponent<Image>().color = Color.gray;
                obj.transform.GetChild(1).GetComponent<Text>().color = Color.black;
                obj.transform.GetChild(1).GetComponent<Text>().fontStyle = FontStyle.Bold;
                currentSelect = obj;
            }
        }
    }

    bool showOp1 = true;
    public void OnBtnShowOpClick()
    {
        if (showOp1)
        {
            InitialBooks2();
        }
        else
        {
            InitialBooks1();
        }
        showOp1 = !showOp1;
        btnShowOp.GetComponent<Image>().sprite = showOp1 ? spShowOp2 : spShowOp1;
    }

    bool isFirstClick = true;
    /// <summary>
    /// 书籍单击事件
    /// </summary>
    void OnImageBookClick()
    {
        GameObject obj = EventSystem.current.currentSelectedGameObject.transform.parent.gameObject;

        if (isFirstClick)
        {
            isFirstClick = false;

            anim.SetTrigger("OpenBook");
        }
        else
        {
            anim.SetTrigger("BookClick");
        }

        LoadBookContents(obj);
    }

    GameObject currentSelect;
    /// <summary>
    /// 加载书籍内容
    /// </summary>
    /// <param name="obj"></param>
    void LoadBookContents(GameObject obj)
    {
        if (obj != currentSelect)
        {
            if (currentSelect != null)
            {
                string key = null;
                for (int i = 1; i < dicBooks[currentSelect.name]; i++)
                {
                    key = string.Format("{0}Books/{1}/{2}.jpg", basePath, currentSelect.name, i);
                    if (dicTmp.ContainsKey(key))
                    {
                        Destroy(dicTmp[key]);
                        dicTmp.Remove(key);
                    }
                }
            }

            txtTitle.text = obj.name;

            Sprite[] spPages = new Sprite[dicBooks[obj.name]];  // 根据页数创建Sprite数组
            bookContents.bookPages = spPages;
            bookContents.currentPage = 0;
            bookContents.LeftNext.sprite = bookContents.bgLeft;
            bookContents.RightNext.sprite = obj.transform.GetChild(0).GetComponent<Image>().sprite;

            if (currentSelect != null)
            {
                currentSelect.GetComponent<Image>().color = Color.white;
                currentSelect.transform.GetChild(1).GetComponent<Text>().color = Color.gray;
                currentSelect.transform.GetChild(1).GetComponent<Text>().fontStyle = FontStyle.Normal;
            }
            obj.GetComponent<Image>().color = Color.gray;
            obj.transform.GetChild(1).GetComponent<Text>().color = Color.black;
            obj.transform.GetChild(1).GetComponent<Text>().fontStyle = FontStyle.Bold;

            currentSelect = obj;

            spPages[0] = bookContents.RightNext.sprite;

            LoadNext2PageImage(0);
        }
    }

    public void LoadNext2PageImage(int index)
    {
        if ((index + 1) < dicBooks[currentSelect.name])
        {
            StartCoroutine(GetImage(string.Format("{0}Books/{1}/{2}.jpg", basePath, currentSelect.name, index + 1), index + 1));
        }
        if ((index + 2) < dicBooks[currentSelect.name])
        {
            StartCoroutine(GetImage(string.Format("{0}Books/{1}/{2}.jpg", basePath, currentSelect.name, index + 2), index + 2));
        }
    }

    Dictionary<string, Texture2D> dicTmp = new Dictionary<string, Texture2D>();
    IEnumerator GetImage(string imgName, int index)
    {
        // Debug.Log(imgName);
        Texture2D tex = null;
        if (dicTmp.ContainsKey(imgName))
        {
            tex = dicTmp[imgName];
        }
        else
        {
            UnityWebRequest www = UnityWebRequestTexture.GetTexture(imgName);
            yield return www.SendWebRequest();
            if (www.result == UnityWebRequest.Result.ConnectionError)
            {
                Debug.Log(www.error);
            }
            tex = ((DownloadHandlerTexture)www.downloadHandler).texture;
            dicTmp.Add(imgName, tex);
        }

        bookContents.bookPages[index] = Sprite.Create(tex, new Rect(0, 0, tex.width, tex.height), Vector2.zero);
    }

    public void OnBtnCloseClick()
    {
        BaseController.HideView();

        Destroy(gameObject.transform.parent.gameObject);

        ImageLoader<Image>.ClearImage();
        foreach (var item in dicTmp.Keys)
        {
            Destroy(dicTmp[item]);
        }
    }

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

    public RectTransform rectMain;

    public void OnBtnFullScreenClick()
    {
        if (isFullScreen)
        {
            isFullScreen = false;
            rectMain.localScale = Vector3.one * 0.6f;
        }
        else
        {
            isFullScreen = true;
            rectMain.localScale = Vector3.one;
        }
    }
}