using AsbCloudApp.Data;
using AsbCloudApp.Data.ProcessMapPlan;
using AsbCloudApp.Data.ProcessMaps.Report;
using AsbCloudApp.Exceptions;
using AsbCloudApp.Repositories;
using AsbCloudApp.Requests;
using AsbCloudApp.Services;
using AsbCloudApp.Services.ProcessMaps.WellDrilling;
using AsbCloudDb.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace AsbCloudInfrastructure.Services.ProcessMaps.Report
{
    public class ProcessMapReportDataSaubStatService : IProcessMapReportDataSaubStatService
    {
        private readonly IWellService wellService;
        private readonly IChangeLogRepository<ProcessMapPlanDrillingDto, ProcessMapPlanBaseRequestWithWell> processMapPlanBaseRepository;
        private readonly IDataSaubStatRepository dataSaubStatRepository;
        private readonly IWellOperationRepository wellOperationRepository;

        public ProcessMapReportDataSaubStatService(IWellService wellService,
            IChangeLogRepository<ProcessMapPlanDrillingDto, ProcessMapPlanBaseRequestWithWell> processMapPlanBaseRepository,
            IDataSaubStatRepository dataSaubStatRepository,
            IWellOperationRepository wellOperationRepository
            )
        {
            this.wellService = wellService;
            this.processMapPlanBaseRepository = processMapPlanBaseRepository;
            this.dataSaubStatRepository = dataSaubStatRepository;
            this.wellOperationRepository = wellOperationRepository;
        }

        public async Task<IEnumerable<ProcessMapReportDataSaubStatDto>> GetAsync(int idWell, DataSaubStatRequest request, CancellationToken token)
        {
            var well = await wellService.GetOrDefaultAsync(idWell, token)
                   ?? throw new ArgumentInvalidException(nameof(idWell), $"Скважина с Id: {idWell} не найдена");

            if (!well.IdTelemetry.HasValue)
                return Enumerable.Empty<ProcessMapReportDataSaubStatDto>();

            var requestProcessMapPlan = new ProcessMapPlanBaseRequestWithWell(idWell);
            var processMapPlanWellDrillings = await processMapPlanBaseRepository.Get(requestProcessMapPlan, token);

            if (!processMapPlanWellDrillings.Any())
                return Enumerable.Empty<ProcessMapReportDataSaubStatDto>();

            var dataSaubStats =
                (await dataSaubStatRepository.GetAsync(well.IdTelemetry.Value, token)).ToArray();

            if (!dataSaubStats.Any())
                return Enumerable.Empty<ProcessMapReportDataSaubStatDto>();

            var requestWellOperationFact = new WellOperationRequest()
            {
                IdWell = idWell,
                OperationType = WellOperation.IdOperationTypeFact
            };
            var wellOperations = await wellOperationRepository
                .GetAsync(requestWellOperationFact, token);
            if (!wellOperations.Any())
                return Enumerable.Empty<ProcessMapReportDataSaubStatDto>();

            var timeZone = TimeSpan.FromHours(wellService.GetTimezone(idWell).Hours);
            var result = CalcByIntervals(request, processMapPlanWellDrillings, dataSaubStats, wellOperations, timeZone);

            return result;
        }

        private IEnumerable<ProcessMapReportDataSaubStatDto> CalcByIntervals(
            DataSaubStatRequest request,
            IEnumerable<ProcessMapPlanDrillingDto> processMapPlanWellDrillings,
            Span<DataSaubStatDto> dataSaubStats,
            IEnumerable<WellOperationDto> wellOperations,
            TimeSpan timeZone
        )
        {
            var list = new List<ProcessMapReportDataSaubStatDto>();
            var firstElemInInterval = dataSaubStats[0];

            var indexStart = 0;
            for (var i = 1; i < dataSaubStats.Length; i++)
            {
                var currentElem = dataSaubStats[i];
                if (IsNewInterval(currentElem, firstElemInInterval, request) || i == dataSaubStats.Length - 1)
                {
                    var length = i - indexStart;
                    var elem = CalcStat(processMapPlanWellDrillings, dataSaubStats, indexStart, length, wellOperations, timeZone);
                    if (elem != null)
                        list.Add(elem);

                    indexStart = i;
                    firstElemInInterval = currentElem;
                }
            }
            return list;
        }

        private ProcessMapReportDataSaubStatDto? CalcStat(
            IEnumerable<ProcessMapPlanDrillingDto> processMapPlanDrillingDtos,
            Span<DataSaubStatDto> dataSaubStats,
            int indexStart,
            int length,
            IEnumerable<WellOperationDto> wellOperations,
            TimeSpan timeZone
        )
        {
            var span = dataSaubStats.Slice(indexStart, length);
            var firstElemInInterval = span[0];
            var lastElemInInterval = span[^1];

            var nearestOperation = wellOperations?.MinBy(o => firstElemInInterval.DateStart - o.DateStart);
            if (nearestOperation is null)
                return null;

            var processMapPlanFilteredByDepth = processMapPlanDrillingDtos
                    .Where(x => x.IdWellSectionType == nearestOperation.IdWellSectionType)
                    .Where(x => x.DepthStart >= firstElemInInterval.DepthStart)
                    .Where(x => x.DepthEnd <= lastElemInInterval.DepthEnd)
                    .ToArray();
            if (!processMapPlanFilteredByDepth.Any())
                return null;

            var deltaDepth = lastElemInInterval.DepthEnd - firstElemInInterval.DepthStart;
            var drilledTime = (lastElemInInterval.DateEnd - firstElemInInterval.DateStart).TotalHours;

            var aggregatedValues = CalcAggregate(span);

            return new ProcessMapReportDataSaubStatDto()
            {
                DateStart = firstElemInInterval.DateStart.ToOffset(timeZone).DateTime,
                WellSectionTypeName = nearestOperation.WellSectionTypeName ?? string.Empty,
                DepthStart = firstElemInInterval.DepthStart,
                DepthEnd = lastElemInInterval.DepthEnd,
                DeltaDepth = deltaDepth,
                DrilledTime = drilledTime,
                DrillingMode = nearestOperation.CategoryName ?? string.Empty,
                PressureDiff = new ProcessMapReportDataSaubStatParamsDto()
                {
                    SetpointPlanMax = processMapPlanFilteredByDepth.Max(p => p.DeltaPressurePlan),
                    SetpointPlanMin = processMapPlanFilteredByDepth.Min(p => p.DeltaPressurePlan),
                    SetpointFact = firstElemInInterval.PressureSp - firstElemInInterval.PressureIdle,
                    FactWavg = aggregatedValues.Pressure,
                    Limit = processMapPlanFilteredByDepth.Max(p => p.DeltaPressureLimitMax),
                    SetpointUsage = aggregatedValues.SetpointUsagePressure
                },
                AxialLoad = new ProcessMapReportDataSaubStatParamsDto()
                {
                    SetpointPlanMax = processMapPlanFilteredByDepth.Max(p => p.AxialLoadPlan),
                    SetpointPlanMin = processMapPlanFilteredByDepth.Min(p => p.AxialLoadPlan),
                    SetpointFact = aggregatedValues.AxialLoadSp,
                    FactWavg = aggregatedValues.AxialLoad,
                    Limit = processMapPlanFilteredByDepth.Max(p => p.AxialLoadLimitMax),
                    SetpointUsage = aggregatedValues.SetpointUsageAxialLoad
                },
                TopDriveTorque = new ProcessMapReportDataSaubStatParamsDto()
                {
                    SetpointPlanMax = processMapPlanFilteredByDepth.Max(p => p.TopDriveTorquePlan),
                    SetpointPlanMin = processMapPlanFilteredByDepth.Min(p => p.TopDriveTorquePlan),
                    SetpointFact = aggregatedValues.RotorTorqueSp,
                    FactWavg = aggregatedValues.RotorTorque,
                    FactMax = aggregatedValues.RotorTorqueMax,
                    Limit = processMapPlanFilteredByDepth.Max(p => p.TopDriveTorqueLimitMax),
                    SetpointUsage = aggregatedValues.SetpointUsageRotorTorque
                },
                SpeedLimit = new ProcessMapReportDataSaubStatParamsDto
                {
                    SetpointPlanMax = processMapPlanFilteredByDepth.Max(p => p.RopPlan),
                    SetpointPlanMin = processMapPlanFilteredByDepth.Min(p => p.RopPlan),
                    SetpointFact = aggregatedValues.BlockSpeedSp,
                    FactWavg = deltaDepth / drilledTime,
                    SetpointUsage = aggregatedValues.SetpointUsageRopPlan
                },
                Turnover = new ProcessMapReportDataSaubStatParamsDto
                {
                    SetpointPlanMax = processMapPlanFilteredByDepth.Max(p => p.TopDriveSpeedPlan),
                    SetpointPlanMin = processMapPlanFilteredByDepth.Min(p => p.TopDriveSpeedPlan),
                    FactWavg = aggregatedValues.RotorSpeed,
                    FactMax = aggregatedValues.RotorSpeedMax
                },
                Flow = new ProcessMapReportDataSaubStatParamsDto
                {
                    SetpointPlanMax = processMapPlanFilteredByDepth.Max(p => p.FlowPlan),
                    SetpointPlanMin = processMapPlanFilteredByDepth.Min(p => p.FlowPlan),
                    FactWavg = aggregatedValues.MaxFlow,
                    Limit = processMapPlanFilteredByDepth.Max(p => p.FlowLimitMax),
                },
                Rop = new PlanFactDto<double?>
                {
                    Plan = CalcRopPlan(processMapPlanFilteredByDepth),
                    Fact = deltaDepth / drilledTime
                },
            };
        }

        private (
            double Pressure,
            double AxialLoadSp,
            double AxialLoad,
            double RotorTorqueSp,
            double RotorTorque,
            double RotorTorqueMax,
            double BlockSpeedSp,
            double RotorSpeed,
            double RotorSpeedMax,
            double MaxFlow,
            double SetpointUsagePressure,
            double SetpointUsageAxialLoad,
            double SetpointUsageRotorTorque,
            double SetpointUsageRopPlan
            ) CalcAggregate(Span<DataSaubStatDto> span)
        {
            var sumPressure = 0.0;
            var sumAxialLoadSp = 0.0;
            var sumAxialLoad = 0.0;
            var sumRotorTorqueSp = 0.0;
            var sumRotorTorque = 0.0;
            var sumBlockSpeedSp = 0.0;
            var sumRotorSpeed = 0.0;
            var maxFlow = 0.0;
            var maxRotorTorque = 0.0;
            var maxRotorSpeed = 0.0;
            var sumDiffDepthByPressure = 0.0;
            var sumDiffDepthByAxialLoad = 0.0;
            var sumDiffDepthByRotorTorque = 0.0;
            var sumDiffDepthByRopPlan = 0.0;

            var diffDepthTotal = 0.0;
            for (var i = 0; i < span.Length; i++)
            {
                var diffDepth = span[i].DepthEnd - span[i].DepthStart;

                sumPressure += diffDepth * span[i].Pressure;
                sumAxialLoadSp += diffDepth * (span[i].AxialLoadSp ?? 0);
                sumAxialLoad += diffDepth * span[i].AxialLoad;
                sumRotorTorqueSp += diffDepth * (span[i].RotorTorqueSp ?? 0);
                sumRotorTorque += diffDepth * span[i].RotorTorque;
                sumBlockSpeedSp += diffDepth * (span[i].BlockSpeedSp ?? 0);
                sumRotorSpeed += diffDepth * span[i].RotorSpeed;
                maxFlow = span[i].Flow > maxFlow ? span[i].Flow : maxFlow;
                maxRotorTorque = span[i].RotorTorque > maxRotorTorque ? span[i].RotorTorque : maxRotorTorque;
                maxRotorSpeed = span[i].RotorSpeed > maxRotorSpeed ? span[i].RotorSpeed : maxRotorSpeed;

                if (span[i].IdFeedRegulator == LimitingParameterDto.Pressure)
                    sumDiffDepthByPressure += span[i].DepthEnd - span[i].DepthStart;
                if (span[i].IdFeedRegulator == LimitingParameterDto.AxialLoad)
                    sumDiffDepthByAxialLoad += span[i].DepthEnd - span[i].DepthStart;
                if (span[i].IdFeedRegulator == LimitingParameterDto.RotorTorque)
                    sumDiffDepthByRotorTorque += span[i].DepthEnd - span[i].DepthStart;
                if (span[i].IdFeedRegulator == LimitingParameterDto.RopPlan)
                    sumDiffDepthByRopPlan += span[i].DepthEnd - span[i].DepthStart;

                diffDepthTotal += diffDepth;


            }
            return (
                Pressure: sumPressure / diffDepthTotal,
                AxialLoadSp: sumAxialLoadSp / diffDepthTotal,
                AxialLoad: sumAxialLoad / diffDepthTotal,
                RotorTorqueSp: sumRotorTorqueSp / diffDepthTotal,
                RotorTorque: sumRotorTorque / diffDepthTotal,
                RotorTorqueMax: maxRotorTorque,
                BlockSpeedSp: sumBlockSpeedSp / diffDepthTotal,
                RotorSpeed: sumRotorSpeed / diffDepthTotal,
                RotorSpeedMax: maxRotorSpeed,
                MaxFlow: maxFlow,
                SetpointUsagePressure: sumDiffDepthByPressure / diffDepthTotal,
                SetpointUsageAxialLoad: sumDiffDepthByAxialLoad / diffDepthTotal,
                SetpointUsageRotorTorque: sumDiffDepthByRotorTorque / diffDepthTotal,
                SetpointUsageRopPlan: sumDiffDepthByRopPlan / diffDepthTotal
            );
        }

        private double CalcRopPlan(ProcessMapPlanDrillingDto[] processMapPlanFilteredByDepth)
        {
            var sumRopPlan = 0.0;
            var diffDepthTotal = 0.0;

            for (var i = 0; i < processMapPlanFilteredByDepth.Length; i++)
            {
                var diffDepth = processMapPlanFilteredByDepth[i].DepthEnd - processMapPlanFilteredByDepth[i].DepthStart;
                sumRopPlan += diffDepth * processMapPlanFilteredByDepth[i].RopPlan;
                diffDepthTotal += diffDepth;
            }
            return sumRopPlan / diffDepthTotal;
        }

        private bool IsNewInterval(DataSaubStatDto currentElem, DataSaubStatDto firstElem, DataSaubStatRequest request)
        {
            bool isNewElemBySpeed(double currentSpeed, double firstSpeed)
            {
                //2. Изменение уставки скорости подачи от первого значения в начале интервала при условии:
                //скорость > 80 м/ч => изменение уставки на ± 20 м/ч;
                //скорость > 30 м/ч => изменение уставки на ± 15 м/ч;
                //скорость <= 30 м/ч => изменение уставки на ± 5 м/ч;
                if (firstSpeed > 80)
                    return Math.Abs(currentSpeed - firstSpeed) >= 20;
                else if (firstSpeed > 30)
                    return Math.Abs(currentSpeed - firstSpeed) >= 15;
                else
                    return Math.Abs(currentSpeed - firstSpeed) >= 5;
            }

            var isNewElem = (currentElem.IdCategory != firstElem.IdCategory)
                || (Math.Abs(currentElem.Pressure - firstElem.Pressure) >= request.DeltaPressure)
                || (Math.Abs(currentElem.AxialLoad - firstElem.AxialLoad) >= request.DeltaAxialLoad)
                || (Math.Abs(currentElem.RotorTorque - firstElem.RotorTorque) >= request.DeltaRotorTorque)
                || (Math.Abs((currentElem.AxialLoadSp ?? 0) - (firstElem.AxialLoadSp ?? 0)) >= request.DeltaAxialLoadSp)
                || (Math.Abs((currentElem.RotorTorqueSp ?? 0) - (firstElem.RotorTorqueSp ?? 0)) >= request.DeltaRotorTorqueSp)
                || (isNewElemBySpeed(currentElem.Speed, firstElem.Speed));
            return isNewElem;
        }
    }
}