using System.Collections.Generic;
using Core.Common.Base;
using Ringtoets.Piping.Data.Probabilistics;

namespace Ringtoets.Piping.Data
{
    /// <summary>
    /// This class holds the information which can be made visible in the graphical interface of the application.
    /// </summary>
    public class PipingData : IObservable
    {
        private readonly IList<IObserver> observers = new List<IObserver>();

        /// <summary>
        /// Constructs a new instance of <see cref="PipingData"/> with default values set for some of the parameters.
        /// </summary>
        public PipingData()
        {
            Name = "Piping";

            // Defaults as they have been defined in 'functional design semi-probabilistic assessments 1209431-008-ZWS-0009 Version 2 Final'
            UpliftModelFactor = 1.0;
            SellmeijerModelFactor = 1.0;
            WaterVolumetricWeight = 10.0;
            WhitesDragCoefficient = 0.25;
            SandParticlesVolumicWeight = 16.5;
            WaterKinematicViscosity = 1.33e-6;
            Gravity = 9.81;
            MeanDiameter70 = 2.08e-4;
            BeddingAngle = 37.0;
            SellmeijerReductionFactor = 0.3;
            CriticalHeaveGradient = 0.3;

            PhreaticLevelExit = new NormalDistribution();
            DampingFactorExit = new LognormalDistribution { Mean = 1.0 };
            ThicknessCoverageLayer = new LognormalDistribution();
            SeepageLength = new LognormalDistribution();
            Diameter70 = new LognormalDistribution();
            DarcyPermeability = new LognormalDistribution();
            ThicknessAquiferLayer = new LognormalDistribution();
        }

        /// <summary>
        /// Gets or sets the name the user gave this this calculation object.
        /// </summary>
        public string Name { get; set; }

        /// <summary>
        /// Gets or sets the reduction factor Sellmeijer.
        /// </summary>
        public double SellmeijerReductionFactor { get; set; }

        /// <summary>
        /// Gets or sets the volumetric weight of water.
        /// [kN/m³]
        /// </summary>
        public double WaterVolumetricWeight { get; set; }

        /// <summary>
        /// Gets or sets the (lowerbound) volumic weight of sand grain material of a sand layer under water.
        /// [kN/m³]
        /// </summary>
        public double SandParticlesVolumicWeight { get; set; }

        /// <summary>
        /// Gets or sets the White's drag coefficient.
        /// </summary>
        public double WhitesDragCoefficient { get; set; }

        /// <summary>
        /// Gets or sets the kinematic viscosity of water at 10 degrees Celsius.
        /// [m²/s]
        /// </summary>
        public double WaterKinematicViscosity { get; set; }

        /// <summary>
        /// Gets or sets the gravitational acceleration.
        /// [m/s²]
        /// </summary>
        public double Gravity { get; set; }

        /// <summary>
        /// Gets or sets the mean diameter of small scale tests applied to different kinds of sand, on which the formula of Sellmeijer has been fit.
        /// [m]
        /// </summary>
        public double MeanDiameter70 { get; set; }

        /// <summary>
        /// Gets or sets the angle of the force balance representing the amount in which sand grains resist rolling.
        /// [°]
        /// </summary>
        public double BeddingAngle { get; set; }

        /// <summary>
        /// Gets or sets the calculation value used to account for uncertainty in the model for uplift.
        /// </summary>
        public double UpliftModelFactor { get; set; }

        /// <summary>
        /// Gets or sets the outside high water level.
        /// [m]
        /// </summary>
        public double AssessmentLevel { get; set; }

        /// <summary>
        /// Gets or sets the piezometric head at the exit point.
        /// [m]
        /// </summary>
        public double PiezometricHeadExit { get; set; }

        /// <summary>
        /// Gets or sets the piezometric head in the hinterland.
        /// [m]
        /// </summary>
        public double PiezometricHeadPolder { get; set; }

        /// <summary>
        /// Gets or sets the calculation value used to account for uncertainty in the model for Sellmeijer.
        /// </summary>
        public double SellmeijerModelFactor { get; set; }

        /// <summary>
        /// Gets or sets the x coordinate of the exit point.
        /// [m]
        /// </summary>
        public double ExitPointXCoordinate { get; set; }

        #region Probabilistic parameters

        /// <summary>
        /// Gets or sets the phreatic level at the exit point.
        /// [m]
        /// </summary>
        public NormalDistribution PhreaticLevelExit { get; set; }

        /// <summary>
        /// Gets or sets the horizontal distance between entree and exit point.
        /// [m]
        /// </summary>
        public LognormalDistribution SeepageLength { get; set; }

        /// <summary>
        /// Gets or sets the sieve size through which 70% fraction of the grains of the top part of the aquifer passes.
        /// [m]
        /// </summary>
        public LognormalDistribution Diameter70 { get; set; }

        /// <summary>
        /// Gets or sets the Darcy-speed with which water flows through the aquifer layer.
        /// [m/s]
        /// </summary>
        public LognormalDistribution DarcyPermeability { get; set; }

        /// <summary>
        /// Gets or sets the thickness of the aquifer layer.
        /// [m]
        /// </summary>
        public LognormalDistribution ThicknessAquiferLayer { get; set; }

        /// <summary>
        /// Gets or sets the total thickness of the coverage layer at the exit point.
        /// [m]
        /// </summary>
        public LognormalDistribution ThicknessCoverageLayer { get; set; }

        /// <summary>
        /// Gets or sets the damping factor at the exit point.
        /// </summary>
        public LognormalDistribution DampingFactorExit { get; set; }

        #endregion

        #region Constants

        /// <summary>
        /// Gets or sets the critical exit gradient for heave.
        /// </summary>
        public double CriticalHeaveGradient { get; private set; }

        #endregion

        /// <summary>
        /// Gets or sets the surface line.
        /// </summary>
        public RingtoetsPipingSurfaceLine SurfaceLine { get; set; }

        /// <summary>
        /// Gets or sets the profile which contains a 1 dimensional definition of soil layers with properties.
        /// </summary>
        public PipingSoilProfile SoilProfile { get; set; }

        /// <summary>
        /// Gets or sets <see cref="PipingOutput"/>, which contains the results of a Piping calculation.
        /// </summary>
        public PipingOutput Output { get; set; }

        /// <summary>
        /// Gets a value indicating whether the <see cref="PipingData"/> has <see cref="Output"/>.
        /// </summary>
        public bool HasOutput
        {
            get
            {
                return Output != null;
            }
        }

        /// <summary>
        /// Clears the <see cref="Output"/>.
        /// </summary>
        public void ClearOutput()
        {
            Output = null;
        }

        public void Attach(IObserver observer)
        {
            observers.Add(observer);
        }

        public void Detach(IObserver observer)
        {
            observers.Remove(observer);
        }

        public void NotifyObservers()
        {
            foreach (var observer in observers)
            {
                observer.UpdateObserver();
            }
        }
    }
}