using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Documents;
using XdCxRhDW.App.Model;
using XdCxRhDW.Dto;
using XdCxRhDW.Repostory;

namespace XdCxRhDW.App
{
    class ServerContext
    {
        public static ServerContext Instance { get; private set; } = new ServerContext();

        readonly List<ModelSvr> list = new List<ModelSvr>();
        public void Init()
        {
            Messenger.Defalut.Sub<SvrStateReportDto>("服务状态改变", dto =>
            {
                try
                {
                    lock (this)
                    {
                        if (dto.ReportType == 0)
                        {

                            var find = list.Find(p => p.BaseHttpAddr == dto.BaseHttpAddr);
                            if (find == null)
                            {
                                list.Add(new ModelSvr()
                                {
                                    SvrType = dto.SvrType,
                                    SvrID = dto.SvrID,
                                    BaseHttpAddr = dto.BaseHttpAddr,
                                    SwaggerAddr = dto.SwaggerAddr,
                                    ReportTime = DateTimeOffset.UtcNow.ToOffset(TimeSpan.FromHours(SysConfig.Config.ZoneHours)),
                                });
                            }
                            else
                            {
                                find.BaseHttpAddr = dto.BaseHttpAddr;
                                find.SwaggerAddr = dto.SwaggerAddr;
                                find.SvrType = dto.SvrType;
                                find.SvrID = dto.SvrID;
                                find.ReportTime = DateTimeOffset.UtcNow.ToOffset(TimeSpan.FromHours(SysConfig.Config.ZoneHours));
                            }
                        }
                        else
                        {
                            var find = list.Find(p => p.BaseHttpAddr == dto.BaseHttpAddr);
                            if (find == null) return;
                            list.Remove(find);
                        }

                        Messenger.Defalut.Pub("服务集合改变", list);
                    }
                }
                catch (Exception ex)
                {
                    XdCxRhDW.Framework.LogHelper.Error("处理服务状态上报异常", ex);
                }
            });
            CheckSvrState();
        }

        public List<ModelSvr> GetAll()
        {
            return list.Skip(0).ToList();
        }
        public List<ModelSvr> GetAll(EnumSvrType type)
        {
            lock (this)
            {
                return list.FindAll(p => p.SvrType == type);
            }
        }
        public ModelSvr GetOne(EnumSvrType type, string svrID)
        {
            lock (this)
            {
                return list.FirstOrDefault(p => p.SvrType == type && p.SvrID == svrID);
            }
        }
        public ModelSvr GetRandomOne(EnumSvrType type)
        {
            ModelSvr svr = null;
            lock (this)
            {
                svr = list.Where(p => p.SvrType == type).OrderBy(p => Guid.NewGuid()).FirstOrDefault();
            }
            if (svr == null)
                throw new Exception($"找不到【{type.GetEnumDisplayName()}】");
            return svr;
        }

        private void CheckSvrState()
        {
            Task.Run(() =>
            {
                while (true)
                {
                    try
                    {
                        lock (this)
                        {
                            List<string> tmp = new List<string>();
                            list.ForEach(t =>
                            {
                                if ((DateTime.Now - t.ReportTime).TotalSeconds > 20)
                                {
                                    tmp.Add(t.BaseHttpAddr);
                                }
                            });
                            list.RemoveAll(p => tmp.Contains(p.BaseHttpAddr));
                        }

                    }
                    catch (Exception ex)
                    {
                        XdCxRhDW.Framework.LogHelper.Error("服务状态检测异常", ex);
                    }
                    Thread.Sleep(10000);
                }
            });

        }
    }
}