using NetTopologySuite.Index.HPRtree;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using StackExchange.Redis;
using System.Collections.Generic;
using static Server.System.Redis;
using static System.Formats.Asn1.AsnWriter;

namespace Server.System
{
    public class Redis
    {
        ConnectionMultiplexer redis;
        IDatabase db;

        bool local = false;

        Dictionary<string, string> stringType;
        Dictionary<string, List<string>> listType;
        Dictionary<string, List<Rank>> zType;
        Dictionary<string, Dictionary<string, object>> hashType;
        public Redis(string host = "127.0.0.1", int port = 6379)
        {
            if (host == "localhost")
            {
                local = true;
                stringType = new Dictionary<string, string>();
                listType = new Dictionary<string, List<string>>();
                zType = new Dictionary<string, List<Rank>>();
                hashType = new Dictionary<string, Dictionary<string, object>>();
            }
            else
            {
                redis = ConnectionMultiplexer.Connect($"{host}:{port}");
                db = redis.GetDatabase();
            }

            test();
        }

        public void test()
        {
            Console.WriteLine("----------");

            Console.WriteLine("----------");
        }

        public void SetString(object value, params string[] keys)
        {
            if (local)
            {
                if (stringType.ContainsKey(KeySet(keys)))
                    stringType[KeySet(keys)] = JsonConvert.SerializeObject(value);
                else
                    stringType.Add(KeySet(keys), JsonConvert.SerializeObject(value));
            }
            else
                db.StringSet(KeySet(keys), JsonConvert.SerializeObject(value));
        }

        public T GetString<T>(params string[] keys)
        {
            if (local)
                return JsonConvert.DeserializeObject<T>(stringType[KeySet(keys)]);
            else
                return JsonConvert.DeserializeObject<T>(db.StringGet(key: KeySet(keys)));
        }

        public void SetList<T>(T value, params string[] keys)
        {
            if (local)
            {
                if (listType.ContainsKey(KeySet(keys)))
                    listType[KeySet(keys)].Add(JsonConvert.SerializeObject(value));
                else
                    listType.Add(KeySet(keys), [JsonConvert.SerializeObject(value)]);
            }
            else
                db.ListRightPush(KeySet(keys), JsonConvert.SerializeObject(value));
        }

        public void SetList<T>(List<T> value, params string[] keys)
        {
            foreach (var item in value)
            {
                SetList(item, keys);
            }
        }

        public T GetList<T>(long index, params string[] keys)
        {
            if (local)
                return JsonConvert.DeserializeObject<T>(listType[KeySet(keys)][(int)index]);
            else
                return JsonConvert.DeserializeObject<T>(db.ListGetByIndex(KeySet(keys), index));
        }

        public List<T> GetList<T>(params string[] keys)
        {
            List<T> result = new List<T>();
            if (local)
            {
                List<string> strings = listType[KeySet(keys)];
                foreach (var item in strings)
                {
                    result.Add(JsonConvert.DeserializeObject<T>(item));
                }
            }
            else
            {
                RedisValue[] strings = db.ListRange(KeySet(keys));
                foreach (var item in strings)
                {
                    result.Add(JsonConvert.DeserializeObject<T>(item));
                }
            }
            return result;
        }

        public void SetZ(string value, double score, params string[] keys)
        {
            SetZ(new Rank(value, score), keys);
        }

        public void SetZ(Rank rank, params string[] keys)
        {
            if (local)
            {
                if (zType.ContainsKey(KeySet(keys)))
                    zType[KeySet(keys)].Add(rank);
                else
                    zType.Add(KeySet(keys), [rank]);
                zType[KeySet(keys)].OrderBy(r => r.score).ToList();
            }
            else
            {
                db.SortedSetAdd(KeySet(keys), rank.value, rank.score);
            }
        }

        public double GetZScore(string value, params string[] keys)
        {
            if (local)
                return zType[KeySet(keys)].Find(n => n.value == value).score;
            else
                return (double)db.SortedSetScore(KeySet(keys), value);
        }

        public long GetZRank(string value, params string[] keys)
        {
            if (local)
                return zType[KeySet(keys)].FindIndex(n => n.value == value) + 1;
            else
                return (long)db.SortedSetRank(KeySet(keys), value);
        }

        public List<Rank> GetZ(long rank, params string[] keys)
        {
            List<Rank> result = new List<Rank>();
            if (local)
            {
                List<Rank> ranking = new List<Rank>(zType[KeySet(keys)]);
                if (ranking.Count > rank)
                    for (long n = 0; n < rank; n++)
                        result.Add(ranking[(int)n]);
                else
                    result = new List<Rank>(ranking);
            }
            else
            {
                var topRankEntries = db.SortedSetRangeByRank(KeySet(keys), 0, rank - 1);
                foreach (var entry in topRankEntries)
                    result.Add(new Rank(entry, GetZScore(entry, keys)));
            }
            return result;
        }

        private string KeySet(string[] keys)
        {
            return string.Join(":", keys);
        }

        public class Rank
        {
            public string value;
            public double score;

            public Rank(string value, double score)
            {
                this.value = value;
                this.score = score;
            }
        }
    }
}