using System;
using System.Linq;
using AsbCloudApp.Data;
using AsbCloudApp.Services;
using AsbCloudInfrastructure.Services.Cache;
using AsbCloudDb.Model;
using System.Collections.Generic;

namespace AsbCloudInfrastructure.Services
{
    public class AnalyticsService : IAnalyticsService
    {
        private readonly IAsbCloudDbContext db;
        private readonly ITelemetryService telemetryService;
        private readonly CacheTable<Operation> cacheOperations;
        private readonly OperationDetectorService operationDetectorService;
        private readonly IEnumerable<Operation> operations;

        public AnalyticsService(IAsbCloudDbContext db, ITelemetryService telemetryService, CacheDb cacheDb)
        {
            this.db = db;
            this.telemetryService = telemetryService;
            cacheOperations = cacheDb.GetCachedTable<Operation>((AsbCloudDbContext)db);
            operations = cacheOperations.Select(c => true);
            operationDetectorService = new OperationDetectorService(operations);
        }

        public IEnumerable<WellDepthToDayDto> GetWellDepthToDay(int wellId)
        {
            var telemetry = telemetryService.GetTelemetryByWellId(wellId);

            if (telemetry is null)
                return null;

            var depthToTimeData = (from d in db.DataSaubBases
                                   where d.IdTelemetry == telemetry.Id
                                   select new
                                   {
                                       d.Id,
                                       d.WellDepth,
                                       d.BitDepth,
                                       d.Date
                                   });

            var m = (int)Math.Round(1d * depthToTimeData.Count() / 2048);

            if (m > 1)
                depthToTimeData = depthToTimeData.Where(d => d.Id % m == 0);

            return depthToTimeData.Select(d => new WellDepthToDayDto
            {
                WellDepth = d.WellDepth ?? 0.0,
                BitDepth = d.BitDepth ?? 0.0,
                Date = d.Date
            }).ToList();
        }

        public IEnumerable<WellDepthToIntervalDto> GetWellDepthToInterval(int wellId,
            int intervalHoursTimestamp, int workBeginTimestamp)
        {
            intervalHoursTimestamp = intervalHoursTimestamp == 0 ? 86400 : intervalHoursTimestamp;

            var intervalTime = new TimeSpan(0, 0, intervalHoursTimestamp);
            var workDayBeginTime = new TimeSpan(0, 0, workBeginTimestamp);

            var telemetry = telemetryService.GetTelemetryByWellId(wellId);

            if (telemetry is null)
                return null;

            var timezoneOffset = telemetryService.GetTimezoneOffsetByTelemetryId(telemetry.Id);

            var drillingPeriodsInfo = db.GetDepthToInterval(telemetry.Id, (int)intervalTime.TotalSeconds,
                (int)workDayBeginTime.TotalSeconds, timezoneOffset);

            var wellDepthToIntervalData = drillingPeriodsInfo.Select(d => new WellDepthToIntervalDto
            {
                IntervalStartDate = d.BeginPeriodDate,
                IntervalDepthProgress = (d.MaxDepth - d.MinDepth) ?? 0.0 / intervalHoursTimestamp
            }).OrderBy(d => d.IntervalStartDate).ToList();

            return wellDepthToIntervalData;
        }

        public IEnumerable<OperationPercentageDto> GetOperationsSummary(int wellId, 
            DateTime begin = default, DateTime end = default)
        {
            return new List<OperationPercentageDto>
            {
                new OperationPercentageDto { ProcessName = "Роторное бурение", Percentage = 19.7 },
                new OperationPercentageDto { ProcessName = "Подъем с проработкой", Percentage = 6.2 },
                new OperationPercentageDto { ProcessName = "Спуск с проработкой", Percentage = 9.4 },
                new OperationPercentageDto { ProcessName = "Подъем с промывкой", Percentage = 18.4 },
                new OperationPercentageDto { ProcessName = "Неподвижное состояние", Percentage = 12.1 },
                new OperationPercentageDto { ProcessName = "Вращение без циркуляции", Percentage = 7.4 },
                new OperationPercentageDto { ProcessName = "Спуск в скважину", Percentage = 16.7 },
                new OperationPercentageDto { ProcessName = "На поверхности", Percentage = 10.1 }
            };
        }

        public IEnumerable<OperationInfoDto> GetOperationsToTime(int wellId, 
            DateTime begin = default, DateTime end = default)
        {
            return new List<OperationInfoDto>
            {
                new OperationInfoDto
                {
                    IntervalBegin = new DateTime(2021, 06, 01, 08, 00, 00),
                    IntervalEnd = new DateTime(2021, 06, 02, 08, 00, 00),
                    OperationData = new List<OperationDetailsDto>
                    {
                        new OperationDetailsDto
                        {
                            OperationName = "Роторное бурение",
                            OperationStartTime = new DateTime(2021, 06, 01, 10, 00, 00),
                            DurationHours = 1.2
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "Подъем с проработкой",
                            OperationStartTime = new DateTime(2021, 06, 01, 11, 00, 00),
                            DurationHours = 3.2
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "Роторное бурение",
                            OperationStartTime = new DateTime(2021, 06, 01, 12, 00, 00),
                            DurationHours = 1.5
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "Неподвижное состояние",
                            OperationStartTime = new DateTime(2021, 06, 01, 13, 00, 00),
                            DurationHours = 0.2
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "Роторное бурение",
                            OperationStartTime = new DateTime(2021, 06, 01, 14, 00, 00),
                            DurationHours = 3.2
                        }
                    }
                },
                new OperationInfoDto
                {
                    IntervalBegin = new DateTime(2021, 06, 02, 08, 00, 00),
                    IntervalEnd = new DateTime(2021, 06, 03, 08, 00, 00),
                    OperationData = new List<OperationDetailsDto>
                    {
                        new OperationDetailsDto
                        {
                            OperationName = "На поверхности",
                            OperationStartTime = new DateTime(2021, 06, 13, 10, 01, 00),
                            DurationHours = 2.2
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "Спуск в скважину",
                            OperationStartTime = new DateTime(2021, 06, 13, 11, 10, 00),
                            DurationHours = 0.4
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "На поверхности",
                            OperationStartTime = new DateTime(2021, 06, 13, 12, 20, 00),
                            DurationHours = 2.5
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "Вращение без циркуляции",
                            OperationStartTime = new DateTime(2021, 06, 13, 13, 00, 00),
                            DurationHours = 1.2
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "Роторное бурение",
                            OperationStartTime = new DateTime(2021, 06, 13, 14, 00, 00),
                            DurationHours = 5.2
                        }
                    }
                },
                new OperationInfoDto
                {
                    IntervalBegin = new DateTime(2021, 06, 03, 08, 00, 00),
                    IntervalEnd = new DateTime(2021, 06, 04, 08, 00, 00),
                    OperationData = new List<OperationDetailsDto>
                    {
                        new OperationDetailsDto
                        {
                            OperationName = "Подъем с проработкой",
                            OperationStartTime = new DateTime(2021, 06, 12, 10, 00, 00),
                            DurationHours = 3.2
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "Спуск с проработкой",
                            OperationStartTime = new DateTime(2021, 06, 12, 11, 00, 00),
                            DurationHours = 1.4
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "Подъем с проработкой",
                            OperationStartTime = new DateTime(2021, 06, 12, 12, 00, 00),
                            DurationHours = 0.5
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "На поверхности",
                            OperationStartTime = new DateTime(2021, 06, 12, 13, 00, 00),
                            DurationHours = 3.2
                        },
                        new OperationDetailsDto
                        {
                            OperationName = "Роторное бурение",
                            OperationStartTime = new DateTime(2021, 06, 13, 14, 00, 00),
                            DurationHours = 1.2
                        }
                    }
                }
            };
        }

        public DrillingAnalysis GetDrillingAnalysis(IEnumerable<DataSaubBase> dataSaubBases)
        {
            var lastSaubDate = dataSaubBases.Last().Date;

            var saubWellDepths = dataSaubBases.Where(sw => sw.WellDepth is not null)
                .Select(s => (Value: (double)s.WellDepth, 
                (s.Date - dataSaubBases.First().Date).TotalSeconds));
            var saubBitDepths = dataSaubBases.Where(sw => sw.BitDepth is not null)
                .Select(s => (Value: (double)s.BitDepth, 
                (s.Date - dataSaubBases.First().Date).TotalSeconds));
            var saubBlockPositions = dataSaubBases.Where(sw => sw.BlockPosition is not null)
                .Select(s => (Value: (double)s.BlockPosition, 
                (s.Date - dataSaubBases.First().Date).TotalSeconds));
            var saubRotorSpeeds = dataSaubBases.Where(sw => sw.RotorSpeed is not null)
                .Select(s => (Value: (double)s.RotorSpeed, 
                (s.Date - dataSaubBases.First().Date).TotalSeconds));
            var saubPressures = dataSaubBases.Where(sw => sw.Pressure is not null)
                .Select(s => (Value: (double)s.Pressure, 
                (s.Date - dataSaubBases.First().Date).TotalSeconds));
            var saubHookWeights = dataSaubBases.Where(sw => sw.HookWeight is not null)
                .Select(s => (Value: (double)s.HookWeight, 
                (s.Date - dataSaubBases.First().Date).TotalSeconds));

            var wellDepthChangingIndex = LinearFunctionCalculator.GetAForLinearFormula(saubWellDepths);
            var bitPositionChangingIndex = LinearFunctionCalculator.GetAForLinearFormula(saubBitDepths);
            var blockPositionChangingIndex = LinearFunctionCalculator.GetAForLinearFormula(saubBlockPositions);
            var rotorSpeedChangingIndex = LinearFunctionCalculator.GetAForLinearFormula(saubRotorSpeeds);
            var pressureChangingIndex = LinearFunctionCalculator.GetAForLinearFormula(saubPressures);
            var hookWeightChangingIndex = LinearFunctionCalculator.GetAForLinearFormula(saubHookWeights);

            var IsBlockRising = LinearFunctionCalculator.IsValueGoesDown(blockPositionChangingIndex, -0.0001);
            var IsBlockGoesDown = LinearFunctionCalculator.IsValueGoesUp(blockPositionChangingIndex, 0.0001);
            var IsBlockStandsStill = LinearFunctionCalculator.IsValueNotChanges(blockPositionChangingIndex, (0.0001, -0.0001));

            var drillingAnalysis = new DrillingAnalysis
            {
                IdTelemetry = dataSaubBases.First().IdTelemetry,
                Date = lastSaubDate,
                IsDepthChanges = LinearFunctionCalculator.IsValueChanges(wellDepthChangingIndex, (0.0001, -0.0001)),
                IsDepthNotChanges = LinearFunctionCalculator.IsValueNotChanges(wellDepthChangingIndex, (0.0001, -0.0001)),
                IsBitRising = LinearFunctionCalculator.IsValueGoesDown(bitPositionChangingIndex, -0.0001),
                IsBitGoesDown = LinearFunctionCalculator.IsValueGoesUp(bitPositionChangingIndex, 0.0001),
                IsBitStandsStill = LinearFunctionCalculator.IsValueNotChanges(bitPositionChangingIndex, (0.0001, -0.0001)),
                IsBitDepthLess20 = LinearFunctionCalculator.IsAverageLessThanBound(saubBitDepths, 20),
                IsBlockRising = LinearFunctionCalculator.IsValueGoesDown(blockPositionChangingIndex, -0.0001),
                IsBlockGoesDown = LinearFunctionCalculator.IsValueGoesUp(blockPositionChangingIndex, 0.0001),
                IsBlockStandsStill = LinearFunctionCalculator.IsValueNotChanges(blockPositionChangingIndex, (0.0001, -0.0001)),
                IsRotorSpeedLess3 = LinearFunctionCalculator.IsAverageLessThanBound(saubRotorSpeeds, 3),
                IsRotorSpeedMore3 = LinearFunctionCalculator.IsAverageMoreThanBound(saubRotorSpeeds, 3),
                IsPressureLess20 = LinearFunctionCalculator.IsAverageLessThanBound(saubPressures, 20),
                IsPressureMore20 = LinearFunctionCalculator.IsAverageMoreThanBound(saubPressures, 20),
                IsHookWeightNotChanges = LinearFunctionCalculator.IsValueNotChanges(hookWeightChangingIndex, (0.0001, -0.0001)),
                IsHookWeightLess3 = LinearFunctionCalculator.IsAverageLessThanBound(saubHookWeights, 3),
                IdOperation = 1
            };

            drillingAnalysis.IdOperation = operationDetectorService.DetectOperation(drillingAnalysis).Id;

            return drillingAnalysis;
        }
    }
}