using System;
using System.Collections.Generic;

namespace ET
{

    public class MailComponentAwakeSystem : AwakeSystem<MailComponent>
    {
        public override void Awake(MailComponent self)
        {
            MailComponent.Instance = self;
        }
    }

    public class MailComponentDestroySystem : DestroySystem<MailComponent>
    {
        public override void Destroy(MailComponent self)
        {
            //self.MailLibDic.Clear();
        }
    }
    public class Mail_Per1DayEvent : AEvent<EventType.UpdatePer1DayOfMonth>
    {
        public override async ETTask Run(EventType.UpdatePer1DayOfMonth args)
        {
            var now = args.now;

            var ret = await DBComponent.Instance.UpdateJson<MailLib>("{}", $"{{'$pull':{{'Dic':{{'v.RemainTime':{{ $lt:{now}}}}}}}}}");
         
        }
    }

    public static class MailComponentSystem
    {
        private const int MailCount_Per_Page = 10; 
        public static async ETTask AddMail(this MailComponent self, long id,string title,string content ,string sender = "系统")
        {
            await ETTask.CompletedTask;
        }
        public static async ETTask AddMail(this MailComponent self, long unitId, Mail mail)
        {
            var mailLib = await self.Quary(unitId);
            mailLib.Dic.Add(mail.Id, mail);
            await self.Save(mailLib);
        }
        public static async ETTask AddMail(this MailComponent self, long unitId, IEnumerable<Mail> mails)
        {
            var mailLib = await self.Quary(unitId);
            foreach (var item in mails)
            {
                mailLib.Dic.Add(item.Id, item);
            }
            self.Save(mailLib).Coroutine();
        }
        public static async ETTask Save(this MailComponent self, MailLib mailLib)
        {
            await DBComponent.Instance.Save(mailLib);
        }
        public static async ETTask<MailLib> Quary(this MailComponent self, long id)
        {
            //if (!self.MailLibDic.TryGetValue(id, out var mailLib))
            //{
               var  mailLib = await DBComponent.Instance.Query<MailLib>(id);
                if (mailLib == null)
                {
                    mailLib = EntityFactory.CreateWithId<MailLib>(self, id);
                }
                //self.MailLibDic[id] = mailLib;
            //}
            return mailLib;

        }
        public static async ETTask<int> GetMail(this MailComponent self, long id, int page, System.Collections.Generic.List<Mail> mailList)
        {
            var mailLib = await self.Quary(id);
            int index = -1, count = MailCount_Per_Page;
            foreach (var mail in mailLib.Dic.Values)
            {
                if (mail.RemainTime < TimeHelper.ClientNow()) continue;
                if (count <= 0) break;
                index++;
                if (((index - page * MailCount_Per_Page) | (((page + 1) * MailCount_Per_Page) - index - 1)) >= 0)
                {
                    count--;
                    mailList.Add(mail);
                }
            }
            return mailLib.Dic.Count / MailCount_Per_Page + 1;
        }

        public static async ETTask<(string, int)> ReceiveMail(this MailComponent self, Unit unit, long mailId, int page, System.Collections.Generic.List<Mail> mailList)
        {
            var mailLib = await self.Quary(unit.Id);
            if (!mailLib.Dic.TryGetValue(mailId, out var mail))
            {
                Log.Error($"【{ UserComponent.Instance.Get(unit.Id)?.NickName} ({ unit.Id})】没有 mailId ={mailId}的邮件");
                return ("系统错误", 0);
            }
            if (mail.State != MailState.UnReceive)
            {
                Log.Error($"【{ UserComponent.Instance.Get(unit.Id)?.NickName} ({ unit.Id})】 要领取 mailId ={mailId}的邮件，但是邮件以领取，突破客户端验证");
                return ("系统错误", 0);
            }
            
            mail.State = MailState.Received;
            await self.Save(mailLib);
            string addItemRet = null;
            using var listComponent = ListComponent<(int, long)>.Create(); 
            foreach (var item in mail.RewordArr)
            {
                listComponent.List.Add((item.ItemId, item.Count));
            }
            if (!ItemComponent.Instance.CanAddItem(unit, listComponent.List))
            {
                mail.State = MailState.UnReceive;
                await self.Save(mailLib);
                return (ConstDefine.BagFullError,0);
            }
            foreach (var item in mail.RewordArr)
            {
                if (item.IsHasItem)
                    addItemRet = BagHelper.AddItem(unit, item.ItemId, item.Count, item.IsLock, item.Item, getSource: item.Item.getSource);
                else
                    addItemRet = BagHelper.AddItem(unit, item.ItemId, item.Count, true, getSource: item.getSource);
                if (addItemRet != null)
                {
                    Log.Error($"{addItemRet}");
                    return (addItemRet, 0);
                }
            }
            UnitHelper.Save<Bag>(unit).Coroutine();
            UnitHelper.Save<NumericComponent>(unit).Coroutine();
            //!获取更新后的邮件列表
            int index = -1, count = MailCount_Per_Page;
            foreach (var _mail in mailLib.Dic.Values)
            {
                if (_mail.RemainTime < TimeHelper.ClientNow()) continue;
                if (count <= 0) break;
                index++;
                if (((index - page * MailCount_Per_Page) | (((page + 1) * MailCount_Per_Page) - index - 1)) >= 0)
                {
                    count--;
                    mailList.Add(_mail);
                }
            }

            return (addItemRet, mailLib.Dic.Count / MailCount_Per_Page + 1);
        }
        public static async ETTask<(string, int)> ReceiveAllMail(this MailComponent self, Unit unit, System.Collections.Generic.List<Mail> mailList)
        {
            var mailLib = await self.Quary(unit.Id);
            string addItemRet = null;
            using var listComponent = ListComponent<(int, long)>.Create();
            foreach (var mail in mailLib.Dic.Values)
            {
                if (mail.State != MailState.UnReceive)
                {
                    continue;
                }
                mail.State = MailState.Received;
                listComponent.List.Clear();
                foreach (var item in mail.RewordArr)
                {
                    listComponent.List.Add((item.ItemId, item.Count));
                }
                if (!ItemComponent.Instance.CanAddItem(unit, listComponent.List))
                {
                    mail.State = MailState.UnReceive;
                    await self.Save(mailLib);
                    return (ConstDefine.BagFullError, 0);
                }
                foreach (var item in mail.RewordArr)
                {
                    if (item.IsHasItem)
                        addItemRet = BagHelper.AddItem(unit, item.ItemId, item.Count, item.IsLock, item.Item, getSource: item.Item.getSource);
                    else
                        addItemRet = BagHelper.AddItem(unit, item.ItemId, item.Count, true, getSource: item.getSource);
                }
                if (addItemRet != null)
                {
                    Log.Error($"{addItemRet}");
                    return (addItemRet, 0);
                }
            }
            await self.Save(mailLib);
            UnitHelper.Save<Bag>(unit).Coroutine();
            UnitHelper.Save<NumericComponent>(unit).Coroutine();
            //!获取更新后的邮件列表
            int index = -1, count = MailCount_Per_Page;
            int page = 0;
            foreach (var _mail in mailLib.Dic.Values)
            {
                if (_mail.RemainTime < TimeHelper.ClientNow()) continue;
                if (count <= 0) break;
                index++;
                if (((index - page * MailCount_Per_Page) | (((page + 1) * MailCount_Per_Page) - index - 1)) >= 0)
                {
                    count--;
                    mailList.Add(_mail);
                }
            }
            return (addItemRet, mailLib.Dic.Count / MailCount_Per_Page + 1);
        }
        public static async ETTask<(string, int)> DeleteMail(this MailComponent self, long id, long mailId, int page, System.Collections.Generic.List<Mail> mailList)
        {
            var mailLib = await self.Quary(id);
            if (!mailLib.Dic.TryGetValue(mailId, out _))
            {
                Log.Error($"玩家Id ={id} 没有 mailId ={mailId}的邮件");
                return ("系统错误", 0);
            }
            mailLib.Dic.Remove(mailId);
            self.Save(mailLib).Coroutine();
            //!获取更新后的邮件列表
            int index = -1, count = MailCount_Per_Page;
            foreach (var _mail in mailLib.Dic.Values)
            {
                if (_mail.RemainTime < TimeHelper.ClientNow()) continue;
                if (count <= 0) break;
                index++;
                if (((index - page * MailCount_Per_Page) | (((page + 1) * MailCount_Per_Page) - index - 1)) >= 0)
                {
                    count--;
                    mailList.Add(_mail);
                }
            }
            return (string.Empty, mailLib.Dic.Count / MailCount_Per_Page + 1);
        }
        public static async ETTask<int> DeleteAllMail(this MailComponent self, long id, System.Collections.Generic.List<Mail> mailList)
        {
            var mailLib = await self.Quary(id);
            List<long> needRemoveList = new List<long>();
            foreach (var mail in mailLib.Dic.Values)
            {
                if (mail.State == MailState.Received)
                {
                    needRemoveList.Add(mail.Id);
                }
            }
            foreach (var item in needRemoveList)
            {
                mailLib.Dic.Remove(item);
            }
            self.Save(mailLib).Coroutine();
            //!获取更新后的邮件列表
            int index = -1, count = MailCount_Per_Page;
            int page = 0;
            foreach (var _mail in mailLib.Dic.Values)
            {
                if (_mail.RemainTime < TimeHelper.ClientNow()) continue;
                if (count <= 0) break;
                index++;
                if (((index - page * MailCount_Per_Page) | (((page + 1) * MailCount_Per_Page) - index - 1)) >= 0)
                {
                    count--;
                    mailList.Add(_mail);
                }
            }
            return mailLib.Dic.Count / MailCount_Per_Page + 1;
        }

    }

}