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

namespace HxGame.Data
{
    public enum Direction
    {
        RightUp,    //右上
        Right,      //右
        RightDown,   //右下
        Down,       //下
        LeftDown,   //左下
        Left,       //左
        LeftUp,     //左上
        Up,         //上
    }


    public class NpcConfig
    {
        public int id;
        public Vector2Int pos;  //刷怪中心点
        public Direction dir;
        public List<string> paths = new List<string>();
    }

    public class NpcsConfig
    {
        public List<NpcConfig> npcConfigs = new List<NpcConfig>();

        public void SaveXML(int mapId)
        {
            string path = PathUtil.GetXmlPath(mapId, "NpcsConfig");
            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 xmlSettings = xml.CreateElement("Settings");//节点Settings
            xml.DocumentElement.AppendChild(xmlSettings);
            xmlSettings.SetAttribute("mapID", mapId.ToString());

            XmlElement Npcs = xml.CreateElement("Npcs");//节点Settings
            xml.DocumentElement.AppendChild(Npcs);

            SaveNpcs(xml, Npcs);

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

        private void SaveNpcs(XmlDocument xml, XmlElement xmlElement)
        {
            XmlElement child = null;
            for (int i = 0; i < npcConfigs.Count; i++)
            {
                child = xml.CreateElement("Npc");
                child.SetAttribute("id", npcConfigs[i].id.ToString());
                child.SetAttribute("indexX", npcConfigs[i].pos.x.ToString());
                child.SetAttribute("indexY", npcConfigs[i].pos.y.ToString());
                child.SetAttribute("dir", ((int)npcConfigs[i].dir).ToString());
                XmlElement NpcPaths = xml.CreateElement("NpcPaths");
                for(int m=0; m<npcConfigs[i].paths.Count; m++)
                {
                    XmlElement path = xml.CreateElement($"Path{m}");
                    path.SetAttribute("pos", npcConfigs[i].paths[m]);
                    NpcPaths.AppendChild(path);
                }

                child.AppendChild(NpcPaths);
                xmlElement.AppendChild(child);
            }
        }

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

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

            XmlNode xmlRoot = xmlDocument.SelectSingleNode("config");
            XmlNode xmlSettings = xmlRoot.SelectSingleNode("Settings");

            int id = Convert.ToInt32(xmlSettings.Attributes.GetNamedItem("mapID").Value);
            if (id != mapId)
            {
                UIWindow.Instance.ShowMessage("地图ID错误，请检查NpcsConfig配置文件");
                return false;
            }

            XmlNode Npcs = xmlRoot.SelectSingleNode("Npcs");
            LoadNpcs(Npcs);

            return true;
        }

        private void LoadNpcs(XmlNode xmlNodes)
        {
            if (xmlNodes == null)
                return;

            XmlNode xmlNode = null;
            XmlNodeList xmlNodeList = xmlNodes.ChildNodes;
            int x, y;

            for (int i = 0; i < xmlNodeList.Count; i++)
            {
                xmlNode = xmlNodeList.Item(i);
                if (xmlNode.Name != "Npc")
                    continue;

                NpcConfig nc = new NpcConfig();
                nc.id = Convert.ToInt32(xmlNode.Attributes.GetNamedItem("id").Value);
                x = Convert.ToInt32(xmlNode.Attributes.GetNamedItem("indexX").Value);
                y = Convert.ToInt32(xmlNode.Attributes.GetNamedItem("indexY").Value);
                nc.pos = new Vector2Int(x, y);
                nc.dir = (Direction)Convert.ToInt32(xmlNode.Attributes.GetNamedItem("dir").Value);

                XmlNode xmlPaths = xmlNode.SelectSingleNode("NpcPaths");
                if(xmlPaths != null)
                {
                    XmlNodeList xmlPathList = xmlPaths.ChildNodes;
                    for (int m = 0; m < xmlPathList.Count; m++)
                    {
                        XmlNode xmlPath = xmlPathList.Item(m);
                        if (xmlPath.Name != $"Path{m}")
                            continue;

                        string path = xmlPath.Attributes.GetNamedItem("pos").Value;
                        nc.paths.Add(path);
                    }
                }

                npcConfigs.Add(nc);
            }
        }
    }

}