using EgwCoreLib.Utils;
using Microsoft.Extensions.Configuration;
using MP.Core.DTO;
using MP.Data.DbModels.Utils;
using MP.Data.Repository.Utils;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace MP.Data.Services.Utils
{
    public class StatsAggrService : BaseServ, IStatsAggrService
    {
        #region Public Constructors

        public StatsAggrService(
            IConfiguration config,
            IConnectionMultiplexer redis,
            IStatsAggrRepository repo) : base(config, redis)
        {
            _className = "StatsAggr";
            _repo = repo;
        }

        #endregion Public Constructors

        #region Public Methods

        /// <inheritdoc />
        public async Task<List<StatsAggregatedModel>> GetFiltAsync(DateTime dtStart, DateTime dtEnd)
        {
            return await TraceAsync($"{_className}.GetFilt", async (activity) =>
            {
                return await GetOrSetCacheAsync(
                    $"{_redisBaseKey}:{_className}:DT:{dtStart:yyyyMMdd}:{dtEnd:yyyyMMdd}",
                    async () => await _repo.GetFiltAsync(dtStart, dtEnd),
                    UltraLongCache
                );
            });
        }

        /// <inheritdoc />
        public async Task<Dictionary<string, List<StatDataDTO>>> GetParetoStatsWeekAsync()
        {
            return await TraceAsync($"{_className}.GetDailyParetoStats", async (activity) =>
            {
                return await GetOrSetCacheAsync(
                    $"{_redisBaseKey}:{_className}:ParetoWeek",
                    async () => await GetParetoDataAsync(),
                    LongCache
                );
            });
        }

        /// <inheritdoc />
        public async Task<DtUtils.Periodo> GetRangeAsync()
        {
            return await TraceAsync($"{_className}.GetRange", async (activity) =>
            {
                return await GetOrSetCacheAsync(
                    $"{_redisBaseKey}:{_className}:Range",
                    async () => await _repo.GetRangeAsync(),
                    UltraFastCache
                );
            });
        }

        /// <inheritdoc />
        public async Task<int> UpsertManyAsync(List<StatsAggregatedModel> listRecords, bool removeOld)
        {
            return await TraceAsync($"{_className}.UpsertMany", async (activity) =>
            {
                string operation = "UpsertMany";
                var success = await _repo.UpsertManyAsync(listRecords, removeOld);

                activity?.SetTag("db.operation", operation);

                if (success > 0)
                {
                    await ClearCacheAsync($"{_redisBaseKey}:{_className}:*");
                }

                return success;
            });
        }

        #endregion Public Methods

        #region Protected Methods

        /// <summary>
        /// metodo locale per recupero e trasformazione dati da includere con processo generare di tracking & cache
        /// </summary>
        /// <returns></returns>
        protected async Task<Dictionary<string, List<StatDataDTO>>> GetParetoDataAsync()
        {
            Dictionary<string, List<StatDataDTO>> result = new();
            DateTime oggi = DateTime.Today;
            var rawData = await GetFiltAsync(oggi.AddDays(-7), oggi);
            // calcolo le varie statistiche...
            var pDestRequest = rawData.GroupBy(x => x.Destination)
                    .Select(g => new StatDataDTO
                    {
                        Label = g.Key,
                        Value = g.Sum(x => x.RequestCount)
                    })
                    .OrderByDescending(x => x.Value)
                    .ToList();
            result.Add("Dest.Request (#)", pDestRequest);

            var pDestDuration = rawData.GroupBy(x => x.Destination)
                    .Select(g => new StatDataDTO
                    {
                        Label = g.Key,
                        Value = g.Sum(x => x.RequestCount * x.AvgDuration)
                    })
                    .OrderByDescending(x => x.Value)
                    .ToList();
            result.Add("Dest.Duration (ms)", pDestDuration);

            return result;
        }

        #endregion Protected Methods

        #region Private Fields

        private readonly string _className;
        private readonly IStatsAggrRepository _repo;

        #endregion Private Fields
    }
}