using Server.System;
using Newtonsoft.Json;
using Server.SQL;
using System.Text.RegularExpressions;

namespace Server.Service
{
    public class NicknameChange : AbstractService
    {
        private NicknameChangeReq req;
        private void SaveSQL()
        {
            Statics.userSQL.SaveChanges();
        }

        public override string Process()
        {
            User user = Statics.userSQL.SelectUuid(req.uuid);
            string newNickname = req.newNickname;
            string regular = @"^[가-힣a-zA-Z0-9\s]*$";
            string defaultNick = Statics.dynamicDataSQL.SelectName("defaultNick").value;
            int buy;

            //만약 시스템 설정과 같은 닉네임이 온다면 중복 처리
            if (newNickname == defaultNick)
            {       
                   throw new RuntimeException("Duplicate nickname", Error.errordata);
            }

            //닉네임 체크
            if (!Regex.IsMatch(newNickname, regular) || (newNickname.Length < 2 || newNickname.Length > 16) || user.nickname == newNickname)
            {
                //해당 데이터가 들어온다면 유저 정보와 같이 로그를 남기게 만들것
                throw new RuntimeException("Nickname not allowed", Error.errordata);
            }

            //가격 체크
            if (user.nickname == defaultNick)
                buy = 0;
            else
                buy = int.Parse(Statics.dynamicDataSQL.SelectName("nicknameCash").value);

            //현재 충분한 제화가 있는지 확인
            if (!user.buyCash(buy))
            {
                throw new RuntimeException("Cache shortage", Error.nogold);
            }

            //닉네임 중복 검사

            user.nickname = newNickname;

            SaveSQL();
            return makeResp(user);
        }

        public override Protocol ProtocolValue() => Protocol.NicknameChange;

        public override Req Requst(string json)
        {
            req = JsonConvert.DeserializeObject<NicknameChangeReq>(json);
            return req;
        }

        private string makeResp(User user)
        {
            NicknameChangeResp resp = new NicknameChangeResp();
            resp.status = 200;
            resp.nickname = user.nickname;
            resp.cash = (ulong)(user.free_cash + user.pay_cash);
            return resp.ToJson();
        }
    }

    public class NicknameChangeReq : Req
    {
        public string uuid;
        public string newNickname;
        public override bool IsReceivedAllField()
        {
            if (uuid == "")
                return false;
            return true;
        }
    }

    public class NicknameChangeResp : Resp
    {
        public string nickname;
        public ulong cash;
    }
}