using Org.BouncyCastle.Asn1.Ocsp;
using ServerCommon;
using ServerCore; using ServerBase;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GameServer
{
    internal class SearchNicknameAction : EntityActionBase
    {
        ConcurrentDictionary<int, List<string>> m_search_result_pages = new();
        string m_latest_search_string = string.Empty;
        int m_search_result_count = 0;

        readonly int m_page_nickname_count = 10;        // GameConfigData.xlsx 에 추가되어야 함

        public SearchNicknameAction(Player owner)
            : base(owner)
        {
        }

        public override async Task<Result> onInit()
        {
            await Task.CompletedTask;

            var result = new Result();

            return result;
        }

        public override void onClear()
        {
            return;
        }

        public int getSearchResultTotalPageCount()
        {
            return m_search_result_pages.Count;
        }

        public int getSearchResultCount()
        {
            return m_search_result_count;
        }

        public async Task<(Result, List<string>?)> trySearchNickname(string searchString, int pageNum)
        {
            var result = new Result();
            var err_msg = string.Empty;

            var result_page_num = pageNum;

            if (m_latest_search_string != searchString || pageNum == 0)
            {
                m_search_result_pages.Clear();

                // DB 에서 Search
                (result, var search_result_nicknames) = await NicknameHelper.searchNicknameBeginWith(searchString);
                if (result.isFail())
                {
                    err_msg = $"Failed to searchNicknameBeginWith() !!! : searchString:{searchString} : {this.getTypeName()}";
                    Log.getLogger().error(err_msg);
                    
                    return (result, null);
                }

                NullReferenceCheckHelper.throwIfNull(search_result_nicknames, () => $"search_result_nicknames is null !!!");

                m_search_result_count = search_result_nicknames.Count;

                // Search 결과 Page 별 분할 저장
                int last_page = 0;
                var page_nicknames = new List<string>();
                foreach (var nickname in search_result_nicknames)
                {
                    if (page_nicknames.Count == 0)
                    {
                        last_page++;
                        m_search_result_pages.TryAdd(last_page, page_nicknames);
                    }
                    
                    page_nicknames.Add(nickname);

                    if (page_nicknames.Count >= m_page_nickname_count)
                    {
                        page_nicknames = new List<string>();
                    }
                }

                m_latest_search_string = searchString;

                if (pageNum == 0)
                {
                    result_page_num = 1;
                }
            }

            // Page 에 맞는 Nickname들 얻어오기
            if (!m_search_result_pages.TryGetValue(result_page_num, out var result_page_nicknames))
            {
                err_msg = $"Failed to m_search_result_nicknames.TryGetValue() !!! : pageNum:{result_page_num} : {this.getTypeName()}";
                result.setFail(ServerErrorCode.UserNicknameSearchPageWrong, err_msg);
                Log.getLogger().error(err_msg);

                return (result, null);
            }

            return (result, result_page_nicknames);
        }
    }
}