using System;
using System.Linq;
using AsbCloudDb.Model;

namespace AsbCloudInfrastructure.Services.DetectOperations.Detectors;

internal class DetectorDrilling : DetectorAbstract
{
	public override Func<DetectableTelemetry[], int, int, int> GetIdOperation => DefineDrillingOperation;

	protected override bool DetectBegin(DetectableTelemetry[] telemetry, int position, DetectedOperation? previousOperation)
	{
		var point0 = telemetry[position];
		var delta = point0.WellDepth - point0.BitDepth;
		if (delta > 0.03d)
			return false;

		if (point0.Pressure < 25)
			return false;

		if (point0.RotorSpeed < 5)
			return false;
		
		return true;
	}

	protected override int DetectEnd(DetectableTelemetry[] telemetry, int position, DetectedOperation? previousOperation)
	{
		var point0 = telemetry[position];
		var delta = point0.WellDepth - point0.BitDepth;
		
		if (delta > 0.03d)
			return IdReasonOfEnd_DeltaDepthIsHi;

		if (point0.Pressure < 25)
			return IdReasonOfEnd_PressureIsLo;

		return IdReasonOfEnd_NotDetected;
	}

	protected override bool IsValid(DetectableTelemetry[] telemetry, int begin, int end)
		=> IsValidByWellDepthIncreasing(telemetry, begin, end);

	protected override double CalcValue(DetectableTelemetry[] telemetry, int begin, int end)
		=> CalcRop(telemetry, begin, end);

	private static int DefineDrillingOperation(DetectableTelemetry[] telemetry, int begin, int end)
	{
		const int idSlideWithOscillation = 12000;
		
		var telemetryRange = telemetry[begin.. end];
                 
		var avgRotorSpeed = telemetryRange.Average(t => t.RotorSpeed);
                    
		if (avgRotorSpeed < 10)
			return WellOperationCategory.IdSlide;

		var despersion = telemetryRange
			.Average(t => Math.Pow((t.RotorSpeed - avgRotorSpeed) / avgRotorSpeed, 2));

		return despersion < 0.2d ? WellOperationCategory.IdRotor : idSlideWithOscillation;
	}
}