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

namespace HxGame.Data
{
    public class Region
    {
        public int indexX;
        public int indexY;
        public string regionName;
    }


    [Serializable]
    public class MapRegions
    {
        public int regionRowNum;  
        public int regionColNum;
        public float regionWidth;
        public float regionHeight;
        public float cellWidthPixel;
        public float cellHeightPixel;
        public Region[,] regions;


        public void SaveXML(int mapId)
        {
            string path = PathUtil.GetXmlPath(mapId, "MapRegions");
            string tmp = path.Substring(0, path.LastIndexOf('/'));
            if (!Directory.Exists(tmp))
                Directory.CreateDirectory(tmp);

            if (File.Exists(path))
                File.Delete(path);

            XmlDocument xml = new XmlDocument();
            XmlDeclaration node = xml.CreateXmlDeclaration("1.0", "utf-8", "no");
            xml.AppendChild(node);

            XmlElement Root = xml.CreateElement("config");
            xml.AppendChild(Root);

            XmlElement Settings = xml.CreateElement("Settings");//节点Settings
            xml.DocumentElement.AppendChild(Settings);
            SaveMapInfoConfig(mapId, Settings);

            XmlElement Regions = xml.CreateElement("Regions");//节点Settings
            xml.DocumentElement.AppendChild(Regions);
            SaveRegions(xml, Regions);

            xml.Save(path);
            UIWindow.Instance.ShowMessage("保存地图配置成功");
        }

        private void SaveMapInfoConfig(int mapId, XmlElement xmlSettings)
        {
            xmlSettings.SetAttribute("mapID", mapId.ToString());
            xmlSettings.SetAttribute("regionRowNum", regionRowNum.ToString());
            xmlSettings.SetAttribute("regionColNum", regionColNum.ToString());
            xmlSettings.SetAttribute("regionWidth", regionWidth.ToString());
            xmlSettings.SetAttribute("regionHeight", regionHeight.ToString());
            xmlSettings.SetAttribute("cellWidthPixel", cellWidthPixel.ToString());
            xmlSettings.SetAttribute("cellHeightPixel", cellHeightPixel.ToString());
        }

        private void SaveRegions(XmlDocument xml, XmlElement xmlRegions)
        {
            XmlElement child = null;
            foreach(var region in regions)
            {
                child = xml.CreateElement("Region");

                child.SetAttribute("IndexX", region.indexX.ToString());
                child.SetAttribute("IndexY", region.indexY.ToString());
                child.SetAttribute("regionName", region.regionName);

                xmlRegions.AppendChild(child);
            }
        }

        public bool LoadXML(int mapId)
        {
            string path = PathUtil.GetXmlPath(mapId, "MapRegions");
            if (!File.Exists(path))
            {
                UIWindow.Instance.ShowMessage("没有找到地形配置文件");
                return false;
            }

            XmlDocument xmlDocument = new XmlDocument();
            xmlDocument.Load(path);

            XmlNode xmlRoot = xmlDocument.SelectSingleNode("config");
            XmlNode xmlSettings = xmlRoot.SelectSingleNode("Settings");
            XmlNode xmlRegions = xmlRoot.SelectSingleNode("Regions");
            int id = Convert.ToInt32(xmlSettings.Attributes.GetNamedItem("mapID").Value);
            if (id != mapId)
            {
                UIWindow.Instance.ShowMessage("地图ID错误，请检查MapRegions配置文件");
                return false;
            }

            LoadMapInfoConfig(xmlSettings);
            LoadRegions(xmlRegions);

            return true;
        }

        private void LoadMapInfoConfig(XmlNode xmlSettings)
        {
            regionRowNum = Convert.ToInt32(xmlSettings.Attributes.GetNamedItem("regionRowNum").Value);
            regionColNum = Convert.ToInt32(xmlSettings.Attributes.GetNamedItem("regionColNum").Value);
            regionWidth = Convert.ToInt32(xmlSettings.Attributes.GetNamedItem("regionWidth").Value);
            regionHeight = Convert.ToInt32(xmlSettings.Attributes.GetNamedItem("regionHeight").Value);
            cellWidthPixel = Convert.ToInt32(xmlSettings.Attributes.GetNamedItem("cellWidthPixel").Value);
            cellHeightPixel = Convert.ToInt32(xmlSettings.Attributes.GetNamedItem("cellHeightPixel").Value);
        }

        private void LoadRegions(XmlNode xmlRegions)
        {
            XmlNode xmlNode = null;
            XmlNodeList xmlNodeList = xmlRegions.ChildNodes;
            regions = new Region[regionRowNum, regionColNum];
            for (int i = 0; i < xmlNodeList.Count; i++)
            {
                xmlNode = xmlNodeList.Item(i);
                if (xmlNode.Name != "Region")
                    continue;

                Region r = new Region();
                r.indexX = Convert.ToInt32(xmlNode.Attributes.GetNamedItem("IndexX").Value);
                r.indexY = Convert.ToInt32(xmlNode.Attributes.GetNamedItem("IndexY").Value);
                r.regionName = xmlNode.Attributes.GetNamedItem("regionName").Value;
                regions[r.indexX, r.indexY] = r;
            }
        }
    }
}