using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Xml;
using UnityEngine;

public class DisasterInfosManager {
    private static DisasterInfosManager instance;
    public static string path;
    public int currentID = -1;
    public static DisasterInfosManager Instance
    {
        get
        {
            if (instance == null)
            {
                instance = new DisasterInfosManager();
                path = Application.dataPath + "/Data/DisasterInfos.xml";
                if (!File.Exists(path))
                {
                    XmlDocument document = new XmlDocument();
                    XmlDeclaration xmldecl = document.CreateXmlDeclaration("1.0", "UTF-8", "yes");
                    document.AppendChild(xmldecl);
                    XmlElement newChild = document.CreateElement("DisasterInfoList");
                    document.AppendChild(newChild);
                    document.Save(path);
                    document = null;
                }
            }                
            return instance;
        }
    }    
    /// <summary>
    /// 单机版，获取所有灾情
    /// </summary>
    /// <returns></returns>
	public List<DisasterInfo> GetAllDisasterInfos()
    {
        List<DisasterInfo> list = new List<DisasterInfo>();
        XmlDocument document = new XmlDocument();
        document.Load(path);
        XmlNodeList nodeList = document.SelectSingleNode("DisasterInfoList").ChildNodes;
        foreach (XmlElement fileNode in nodeList)
        {
            DisasterInfo info = new DisasterInfo();
            foreach (XmlElement element in fileNode.ChildNodes)
            {
                if (element.Name == "Id")
                {
                    info.Id = int.Parse(element.InnerText);
                }
                if (element.Name == "LastTime")
                {
                    info.LastTime = element.InnerText;
                }
                if (element.Name == "Name")
                {
                    info.Name = element.InnerText;
                }
            }            
            /*string id = fileNode.GetElementsByTagName("Id").
            info.Id = int.Parse(fileNode.GetAttribute("Id"));
            info.LastTime = fileNode.GetAttribute("LastTime");
            info.Name = fileNode.GetAttribute("Name");*/
            list.Add(info);
            if (info.Id > currentID)
            {
                currentID = info.Id;
            }
        }
        return list;
    }
    /// <summary>
    /// 获取灾情列表
    /// </summary>
    /// <returns></returns>
    public List<DisasterInfo> GetDisasterInfos()
    {
        List<DisasterInfo> list = new List<DisasterInfo>();
        XmlDocument document = new XmlDocument();
        document.Load(path);
        XmlNodeList nodeList = document.SelectSingleNode("DisasterInfoList").ChildNodes;
        foreach (XmlElement fileNode in nodeList)
        {
            DisasterInfo info = new DisasterInfo();
            foreach (XmlElement element in fileNode.ChildNodes)
            {
                if (element.Name == "Id")
                {
                    info.Id = int.Parse(element.InnerText);
                }
                if (element.Name == "LastTime")
                {
                    info.LastTime = element.InnerText;
                }
                if (element.Name == "Name")
                {
                    info.Name = element.InnerText;
                }
            }
            /*string id = fileNode.GetElementsByTagName("Id").
            info.Id = int.Parse(fileNode.GetAttribute("Id"));
            info.LastTime = fileNode.GetAttribute("LastTime");
            info.Name = fileNode.GetAttribute("Name");*/
            list.Add(info);
            if (info.Id > currentID)
            {
                currentID = info.Id;
            }
        }
        //var newlist = getFilteredList(list, queryOptions.PageSize, queryOptions.PageNumber);
        //return newlist;
        return list;
    }
    /*private List<DisasterInfo> getFilteredList(List<DisasterInfo> list,int pageSize,int pageNumber)
    {
        int count = list.Count;
        int totalPageCount = Mathf.CeilToInt(count / pageSize);
        totalPageCount = Mathf.Clamp(totalPageCount, 1, 99);
        int iniNum = pageSize * (pageNumber - 1);
        List<DisasterInfo> newList = new List<DisasterInfo>();
        if(pageNumber < totalPageCount)
        {
            for(int i = iniNum; i < pageSize; i++)
            {
                newList.Add(list[i]);
            }
        }
        else
        {
            for(int i = iniNum; i < count; i++)
            {
                newList.Add(list[i]);
            }
        }
        return newList;
    }*/
    /// <summary>
    /// 添加新灾情
    /// </summary>
    /// <param name="info"></param>
    public void AddNewDisasterInfo(DisasterInfo info)
    {        
        info.Id = currentID + 1;
        XmlDocument document = new XmlDocument();
        document.Load(path); 
        XmlNode node = document.SelectSingleNode("DisasterInfoList");
        XmlElement infoNode = document.CreateElement("DisasterInfo");
        /*infoNode.SetAttribute("Id", info.Id.ToString());
        infoNode.SetAttribute("LastTime", info.LastTime);
        infoNode.SetAttribute("Name", info.Name);*/
        node.AppendChild(infoNode);

        XmlElement idNode = document.CreateElement("Id");
        idNode.InnerText = info.Id.ToString();
        infoNode.AppendChild(idNode);

        XmlElement LastTimeNode = document.CreateElement("LastTime");
        LastTimeNode.InnerText = info.LastTime;
        infoNode.AppendChild(LastTimeNode);

        XmlElement nameNode = document.CreateElement("Name");
        nameNode.InnerText = info.Name;
        infoNode.AppendChild(nameNode);

        document.Save(path);
        document = null;

        //在本地创建以灾情ID命名的文件夹 
        var directoryPath = Application.dataPath + "/Data/" + info.Id.ToString() + "/";
        if (Directory.Exists(directoryPath))
        {
            Directory.Delete(directoryPath, true);
        }
        Directory.CreateDirectory(directoryPath);

        //创建空的配置文件
        var localFileXml = Application.dataPath + "/Data/" + info.Id.ToString() + "/" + info.Id.ToString() + ".xml";
        createLocalFileXml(localFileXml);
        //重新回到第一页，申请第一页内容
        PagesController.Instance.ApplyForInitPage();
    }

    private void createLocalFileXml(string localFileXml)
    {
        XmlDocument document = new XmlDocument();
        XmlDeclaration xmldecl = document.CreateXmlDeclaration("1.0", "UTF-8", "yes");
        document.AppendChild(xmldecl);
        XmlElement newChild = document.CreateElement("Files");
        document.AppendChild(newChild);
        document.Save(localFileXml);
        newChild = null;
        document = null;
    }

    /// <summary>
    /// 删除灾情
    /// </summary>
    /// <param name="info"></param>
    public void DeleteDisasterInfo(int delId)
    {
        XmlDocument document = new XmlDocument();
        document.Load(path);
        XmlNode node = document.SelectSingleNode("DisasterInfoList");
        XmlNodeList nodeList = node.ChildNodes;
        /*foreach (XmlElement fileNode in nodeList)
        {
            int id = int.Parse(fileNode.GetAttribute("Id"));
            if (id == delId)
            {
                node.RemoveChild(fileNode);
                break;
            }
        }*/
        foreach (XmlElement fileNode in nodeList)
        {
            XmlNodeList nodelist = fileNode.GetElementsByTagName("Id");
            XmlElement ele = (XmlElement)nodelist[0];
            string id = ele.InnerText;
            if (id == delId.ToString())
            {
                node.RemoveChild(fileNode);
                break;
            }
        }
        document.Save(path);
        document = null;

        DisasterList.Instance.DeleteDisaster(delId);
        //删除灾情文件夹 
        var directoryPath = Application.dataPath + "/Data/" + delId.ToString() + "/";
        if (Directory.Exists(directoryPath))
        {
            Directory.Delete(directoryPath, true);
        }
        //重新回到第一页，申请第一页内容
        PagesController.Instance.ApplyForInitPage();
    }
    /// <summary>
    /// 更新灾情名称
    /// </summary>
    /// <param name="uId"></param>
    /// <param name="uName"></param>
    public void UpdateDisasterInfo(int uId,string uName)
    {
        XmlDocument document = new XmlDocument();
        document.Load(path);
        XmlNode node = document.SelectSingleNode("DisasterInfoList");
        XmlNodeList nodeList = node.ChildNodes;
        foreach (XmlElement fileNode in nodeList)
        {
            XmlElement element = (XmlElement)fileNode.GetElementsByTagName("Id")[0];
            if(element.InnerText == uId.ToString())
            {
                XmlElement nodeName = (XmlElement)fileNode.GetElementsByTagName("Name")[0];
                nodeName.InnerText = uName;
                XmlElement nodeTime=(XmlElement)fileNode.GetElementsByTagName("LastTime")[0];
                nodeTime.InnerText = DateTime.Now.ToString();
                break;
            }
        }
        document.Save(path);
        document = null;
    }
   public void SaveDisasterInfo(string uId)
    {
        XmlDocument document = new XmlDocument();
        document.Load(path);
        XmlNode node = document.SelectSingleNode("DisasterInfoList");
        XmlNodeList nodeList = node.ChildNodes;
        foreach (XmlElement fileNode in nodeList)
        {
            XmlElement element = (XmlElement)fileNode.GetElementsByTagName("Id")[0];
            if (element.InnerText == uId)
            {                
                XmlElement nodeTime = (XmlElement)fileNode.GetElementsByTagName("LastTime")[0];
                nodeTime.InnerText = DateTime.Now.ToString();
                break;
            }
        }
        document.Save(path);
        document = null;
    }
}