using AsbCloudApp.Data;
using AsbCloudApp.Data.DataSaubStat;
using AsbCloudApp.Data.DetectedOperation;
using AsbCloudApp.Data.SAUB;
using AsbCloudApp.Repositories;
using AsbCloudApp.Requests;
using AsbCloudApp.Services;
using AsbCloudDb.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace AsbCloudInfrastructure.Services;


public class DataSaubStatDrillingQualityService : IDataSaubStatService
{
    private IDataSaubStatRepository dataSaubStatRepository;
    private ITelemetryDataCache<TelemetryDataSaubDto> telemetryDataCache;
    private ITelemetryDataSaubService dataSaubService;
    private IDetectedOperationRepository detectedOperationRepository;

    public DataSaubStatDrillingQualityService(
        IDataSaubStatRepository dataSaubStatRepository,
        ITelemetryDataCache<TelemetryDataSaubDto> telemetryDataCache,
        ITelemetryDataSaubService dataSaubService,
        IDetectedOperationRepository detectedOperationRepository)
    {
        this.dataSaubStatRepository = dataSaubStatRepository;
        this.telemetryDataCache = telemetryDataCache;
        this.dataSaubService = dataSaubService;
        this.detectedOperationRepository = detectedOperationRepository;
    }

    public async Task CreateStatAsync(int lastDaysFilter, Action<string, double?> onProgressCallback, CancellationToken token)
    {
        //to do
        var cacheRequest = new TelemetryDataRequest()
        {
            GeDate = DateTime.UtcNow.AddDays(-5000)
        };
        var idTelemetries = telemetryDataCache.GetIds(cacheRequest).ToArray();

        if (!idTelemetries.Any())
            return;

        var stats = new List<DataSaubStatDto>();
            //await dataSaubStatRepository.GetLastsAsync(idTelemetries, token);

        //for (var i = 0; i < idTelemetries.Length; i++)
        //{
        //    var idTelemetry = idTelemetries[i];
        //    var lastDate = stats.FirstOrDefault(s => s.IdTelemetry == idTelemetry)?.DateEnd.ToUniversalTime() ?? DateTimeOffset.UnixEpoch;
        //    var statsCount = await CreateStatForTelemetryFromDate(idTelemetry, lastDate, token);
        //    if(onProgressCallback != null)
        //        onProgressCallback($"Calculate stat for telemetry: {idTelemetry}; from {lastDate}; results count: {statsCount};", 1d * i / idTelemetries.Length);
        //}
    }

    private async Task<int> CreateStatForTelemetryFromDate(
        int idTelemetry,
        DateTimeOffset geDate,
        CancellationToken token)
    {
        var leDate = DateTimeOffset.UtcNow;

        var dataSaub = await dataSaubService.Get([idTelemetry], true, geDate, leDate, 100_000, token);

        if (!dataSaub.Any())
            return 0;

        if (dataSaub is not TelemetryDataSaubDto[] dataSaubArray)
            dataSaubArray = dataSaub.ToArray();

        var dataSaubStats = CreateDataSaubStat(dataSaubArray);

        return 0;

        //return await dataSaubStatRepository.InsertRangeAsync(dataSaubStats, token);
    }

    private static IEnumerable<DataSaubStatDrillingQualityDto> CreateDataSaubStat2(int idFeedRegulator, TelemetryDataSaubDto[] dataSaub)
    {
        var result = new List<DataSaubStatDrillingQualityDto>();

        var indexStart = 0;
        var indexEnd = 0;

        while (indexEnd < dataSaub.Count())
        {
            indexStart = Array.FindIndex(dataSaub, indexEnd, t => t.IdFeedRegulator == idFeedRegulator);
            if (indexStart < 0)
                break;

            indexEnd = Array.FindIndex(dataSaub, indexStart, t => t.IdFeedRegulator != idFeedRegulator);

            if (indexEnd < 0)
                indexEnd = dataSaub.Length - 1;

            if (indexEnd == indexStart)
            {
                continue;
            }


            var length = indexEnd - indexStart + 1;

            var subset = dataSaub.AsSpan(indexStart, length);

            if (length <= 2 || (subset[^1].WellDepth - subset[0].WellDepth) < 0.001)
                continue; // мелкие выборки не учитываем.

            var stats = CalcStats(subset);
            result.Add(stats);

        }
        return result;
    }

    private static Dictionary<int, List<DataSaubStatDrillingQualityDto>> CreateDataSaubStat(TelemetryDataSaubDto[] dataSaub)
    {

        var dict = new Dictionary<int, List<DataSaubStatDrillingQualityDto>>() {
            { 1, new List<DataSaubStatDrillingQualityDto>() },
            { 2, new List<DataSaubStatDrillingQualityDto>() },
            { 3, new List<DataSaubStatDrillingQualityDto>() },
            { 4, new List<DataSaubStatDrillingQualityDto>() },
        };

        foreach (var item in dict)
        {
            var data = CreateDataSaubStat2(item.Key, dataSaub);
            item.Value.AddRange(data);
        }

        return dict;
    }

    private static DataSaubStatDrillingQualityDto CalcStats(Span<TelemetryDataSaubDto> dataSaub)
    {
        var depthDrillingQuality = CalcAggregate(dataSaub);

        var result = new DataSaubStatDrillingQualityDto();
        result.DepthStart = dataSaub[0].WellDepth;
        result.DepthEnd = dataSaub[^1].WellDepth;
        result.DateStart = dataSaub[0].DateTime;
        result.DateEnd = dataSaub[^1].DateTime;
        result.DepthDrillingQuality = depthDrillingQuality;
      
        return result;
    }

    private static DataSaubStatDto CalcStat(DetectedOperationDto operation, Span<TelemetryDataSaubDto> span)
    {
        var aggregatedValues = CalcAggregate(span);
        var dateStart = span[0].DateTime;
        var dateEnd = span[^1].DateTime;
        var depthStart = span[0].WellDepth;
        var depthEnd = span[^1].WellDepth;
        var speed = ((depthEnd - depthStart) / (dateEnd - dateStart).TotalHours);

        var processMapDrillingCacheItem = new DataSaubStatDto
        {
            DateStart = dateStart,
            DateEnd = dateEnd,
            DepthStart = depthStart,
            DepthEnd = depthEnd,
            Speed = speed,
            BlockSpeedSp = span[0].BlockSpeedSp,
            Pressure = aggregatedValues.Pressure,
            PressureIdle = span[0].PressureIdle,
            PressureSp = span[0].PressureSp,
            AxialLoad = aggregatedValues.AxialLoad,
            AxialLoadSp = span[0].AxialLoadSp,
            AxialLoadLimitMax = span[0].AxialLoadLimitMax,
            RotorTorque = aggregatedValues.RotorTorque,
            RotorTorqueSp = span[0].RotorTorqueSp,
            RotorTorqueLimitMax = span[0].RotorTorqueLimitMax,
            IdFeedRegulator = span[0].IdFeedRegulator,
            RotorSpeed = aggregatedValues.RotorSpeed,
            IdCategory = operation.IdCategory,
            EnabledSubsystems = operation.EnabledSubsystems,
            HasOscillation = operation.EnabledSubsystems.IsAutoOscillation,
            IdTelemetry = operation.IdTelemetry,
            Flow = aggregatedValues.Flow
        };
        return processMapDrillingCacheItem;
    }

    private static (
        double Pressure,
        double AxialLoad,
        double RotorTorque,
        double RotorSpeed,
        double Flow
        ) CalcAggregate(Span<TelemetryDataSaubDto> span)
    {
        var sumPressure = 0.0;
        var sumAxialLoad = 0.0;
        var sumRotorTorque = 0.0;
        var sumRotorSpeed = 0.0;
        var flow = span[0].Flow ?? 0.0;
        var diffDepthTotal = span[^1].WellDepth - span[0].WellDepth;
        for (var i = 0; i < span.Length - 1; i++)
        {
            var diffDepth = span[i + 1].WellDepth - span[i].WellDepth;
            sumPressure += diffDepth * span[i].Pressure;
            sumAxialLoad += diffDepth * span[i].AxialLoad;
            sumRotorTorque += diffDepth * span[i].RotorTorque;
            sumRotorSpeed += diffDepth * span[i].RotorSpeed;
            flow = span[i + 1].Flow > flow ? span[i + 1].Flow ?? 0.0 : flow;
        }
        return (
            Pressure: sumPressure / diffDepthTotal,
            AxialLoad: sumAxialLoad / diffDepthTotal,
            RotorTorque: sumRotorTorque / diffDepthTotal,
            RotorSpeed: sumRotorSpeed / diffDepthTotal,
            Flow: flow
        );
    }

    private static bool IsNewCacheItem(TelemetryDataSaubDto previous, TelemetryDataSaubDto current)
    {
        return !(current.Mode == previous.Mode)
             || !(current.WellDepth >= previous.WellDepth)
             || !(current.BlockSpeedSp == previous.BlockSpeedSp)
             || !(current.PressureIdle == previous.PressureIdle)
             || !(current.PressureSp == previous.PressureSp)
             || !(current.AxialLoadSp == previous.AxialLoadSp)
             || !(current.AxialLoadLimitMax == previous.AxialLoadLimitMax)
             || !(current.HookWeightIdle == previous.HookWeightIdle)
             || !(current.RotorTorqueIdle == previous.RotorTorqueIdle)
             || !(current.RotorTorqueSp == previous.RotorTorqueSp)
             || !(current.RotorTorqueLimitMax == previous.RotorTorqueLimitMax)
             || !(current.IdFeedRegulator == previous.IdFeedRegulator);
    }
}