using System;
using System.Collections.Generic;
using System.IO;
using Superlazy.Loader;
using UnityEngine;

namespace Superlazy
{
    public class SLWindowsDataReloader : MonoBehaviour
    {
        private FileSystemWatcher watcher;

        public void Awake()
        {
            watcher = new FileSystemWatcher("..\\Data", "*.yaml")
            {
                NotifyFilter = NotifyFilters.Attributes
                                 | NotifyFilters.CreationTime
                                 | NotifyFilters.DirectoryName
                                 | NotifyFilters.FileName
                                 | NotifyFilters.LastWrite
                                 | NotifyFilters.Security
                                 | NotifyFilters.Size
            };

            watcher.Changed += FileChanged;

            watcher.Filter = "*.yaml";
            watcher.IncludeSubdirectories = true;
            watcher.EnableRaisingEvents = true;
        }

        public void OnApplicationQuit()
        {
            watcher.Dispose();
        }

        private void FileChanged(object sender, FileSystemEventArgs e)
        {
            try
            {
                var file = File.OpenText(e.FullPath);
                var json = file.ReadToEnd();
                var newData = SLEntity.Empty;
                YamlLoader.LoadYaml(newData, json);

                foreach (var data in newData)
                {
                    foreach (var item in data)
                    {
                        // TODO: SLSystem 순환참조 제거
                        ReWrite(data.ID + "." + item.ID, SLSystem.Data[data.ID][item.ID], item);
                    }
                }
            }
            catch (Exception exception)
            {
                SLLog.Error($"Cannot Parse {e.FullPath}. \n{exception.Message}");
            }
        }

        private void ReWrite(string itemID, SLEntity oldData, SLEntity item)
        {
            var removes = new List<string>();
            foreach (var old in oldData)
            {
                if (item[old.ID] == false)
                {
                    removes.Add(old.ID);
                }
            }

            foreach (var remove in removes)
            {
                oldData[remove] = false;
                SLLog.Info($"Reroad Data {itemID}.{remove} : remove");
            }

            foreach (var newItem in item)
            {
                if (newItem.IsValue)
                {
                    if (newItem != oldData[newItem.ID])
                    {
                        oldData[newItem.ID] = newItem;
                        SLLog.Info($"Reroad Data {itemID}.{newItem.ID} : {newItem}");
                    }
                }
                else
                {
                    ReWrite(itemID + "." + newItem.ID, oldData[newItem.ID], newItem);
                }
            }
        }
    }
}