using Deltares.Geotechnics;
using Deltares.Geotechnics.Soils;
using Deltares.Probabilistic;
using Deltares.Standard.Reflection;

namespace Deltares.Stability
{
    /// <summary>
    /// Handles conversions between measured data and design values for WTI macrostability 
    /// calculations.
    /// </summary>
    public class WtiStabilityTransformer : StochastTransformer
    {
        protected override double GetVariationCoefficient(object owner, string property)
        {
            var variationCoefficient = double.NaN;
            var soil = owner as Soil;
            if (soil != null)
            {
                if (soil.GetMemberName(s => s.AbovePhreaticLevel) == property ||
                    soil.GetMemberName(s => s.BelowPhreaticLevel) == property)
                {
                    variationCoefficient = 0.5;
                }
                else if (soil.GetMemberName(s => s.Cohesion) == property ||
                         soil.GetMemberName(s => s.FrictionAngle) == property ||
                         soil.GetMemberName(s => s.StrengthIncreaseExponent) == property ||
                         soil.GetMemberName(s => s.RatioCuPc) == property)
                {
                    variationCoefficient = 0.05;
                }
            }

            var preConsolidationStress = owner as PreConsolidationStress;
            if (preConsolidationStress != null && preConsolidationStress.GetMemberName(pcs => pcs.StressValue) == property)
            {
                variationCoefficient = 0.05;
            }
            return variationCoefficient;
        }
    }
}