using DTS.Common.Classes.Sensors;
using DTS.Common.Utils;
using NUnit.Framework;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DTS.Common.Tests
{
    public class LinearizationFormulaShould
    {
        [Test]
        public void GetLinearizedValue_ShouldReturnCorrectEU_OnNonLinearAndNonProportional()
        {
            //Arrange
            LinearizationFormula linearizationFormula = new LinearizationFormula();
            linearizationFormula.PolynomialCoefficients = new double[] { 1657.882, 4368.774, 204.5695, 24.8535 };
            //Act
            //Assert 
            var resultEU = linearizationFormula.GetLinearizedValue(-0.39272, 5, false);
            Assert.That(resultEU, Is.EqualTo(-27.7773).Within(.0005));

            var resultEU2 = linearizationFormula.GetLinearizedValue(-0.14947, 5, false);
            Assert.That(resultEU2, Is.EqualTo(1009.369).Within(.0005));

            var resultEU3 = linearizationFormula.GetLinearizedValue(0.73579, 5, false);
            Assert.That(resultEU3, Is.EqualTo(4993.034).Within(.0005));

            var resultEU4 = linearizationFormula.GetLinearizedValue(0.30645, 5, false);
            Assert.That(resultEU4, Is.EqualTo(3016.62).Within(.0005));

        }
        [Test]
        public void GetLinearizedValue_ShouldReturnCorrectEU_OnNonLinearAndProportional()
        {
            //Arrange
            LinearizationFormula linearizationFormula = new LinearizationFormula();
            linearizationFormula.PolynomialCoefficients = new double[] { 1657.882, 4368.774, 204.5695, 24.8535 };
            //Act
            //Assert 
            var resultEU = linearizationFormula.GetLinearizedValue(-0.39272, 5, true);
            Assert.That(resultEU, Is.Not.EqualTo(-27.7773).Within(.0005));
            var resultEU2 = linearizationFormula.GetLinearizedValue(-0.14947, 5, true);
            Assert.That(resultEU2, Is.Not.EqualTo(1009.369).Within(.0005));

        }

        [Test]
        public void GetLinearizedValue_ShouldReturnCorrectEU_OnNonLinearAndProportionalSpecifiedAsNull()
        {
            //Arrange
            LinearizationFormula linearizationFormula = new LinearizationFormula();
            linearizationFormula.PolynomialCoefficients = new double[] { 1657.882, 4368.774, 204.5695, 24.8535 };
            //Act
            //Assert 
            var resultEU = linearizationFormula.GetLinearizedValue(-0.39272, 5, null);
            Assert.That(resultEU, Is.Not.EqualTo(-27.7773).Within(.0005));
            var resultEU2 = linearizationFormula.GetLinearizedValue(-0.14947, 5, null);
            Assert.That(resultEU2, Is.Not.EqualTo(1009.369).Within(.0005));

        }

        [Test]
        public void GetLinearizedValue_ShouldNonLinearStyleBePolynomial_ByDefault()
        {
            //Arrange
            LinearizationFormula linearizationFormula = new LinearizationFormula();
            linearizationFormula.PolynomialCoefficients = new double[] { 1657.882, 4368.774, 204.5695, 24.8535 };

            //Act
            //Assert 
            Assert.That(linearizationFormula.NonLinearStyle, Is.EqualTo(Enums.Sensors.NonLinearStyles.Polynomial));

        }

    }
}