using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using DelftTools.TestUtils;

using NUnit.Framework;

using Ringtoets.Piping.Data;
using Ringtoets.Piping.IO.Calculation;
using Ringtoets.Piping.IO.Exceptions;
using Ringtoets.Piping.IO.Properties;

namespace Ringtoets.Piping.IO.Test
{
    public class PipingSoilProfileReaderTest
    {

        private readonly string testDataPath = TestHelper.GetTestDataPath(TestDataPath.Plugins.Wti.WtiIOPath, "PipingSoilProfilesReader");

        [Test]
        public void Constructor_CorrectPath_ReturnsNewInstance()
        {
            // Setup
            var testFile = "empty.soil";

            // Call
            var pipingSoilProfilesReader = new PipingSoilProfileReader(Path.Combine(testDataPath, testFile));
             
            // Assert
            Assert.NotNull(pipingSoilProfilesReader);
        }

        [Test]
        public void Constructor_NonExistingPath_ThrowsFileNotFoundException()
        {
            // Setup
            var testFile = Path.Combine(testDataPath, "none.soil");

            // Call
            TestDelegate test = () => new PipingSoilProfileReader(testFile);

            // Assert
            var exception = Assert.Throws<FileNotFoundException>(test);
            Assert.AreEqual(String.Format(Resources.Error_File_0_does_not_exist, testFile), exception.Message);
        }

        [Test]
        [TestCase(null)]
        [TestCase("")]
        public void ReadSoilProfiles_NullOrEmpty_ThrowsArgumentException(string fileName)
        {
            // Call
            TestDelegate test = () => new PipingSoilProfileReader(fileName);

            // Assert
            var exception = Assert.Throws<ArgumentException>(test);
            Assert.AreEqual(Resources.Error_PathMustBeSpecified, exception.Message);
        }

        [Test]
        public void ReadSoilProfiles_IncorrectFormatFile_ThrowsSqLiteException()
        {
            // Setup
            var dbName = "text";
            var testFile = Path.Combine(testDataPath, dbName + ".txt");
            var pipingSoilProfilesReader = new PipingSoilProfileReader(testFile);

            // Call
            TestDelegate test = () => pipingSoilProfilesReader.Read();

            // Assert
            var exception = Assert.Throws<PipingSoilProfileReadException>(test);
            Assert.AreEqual(String.Format(Resources.Error_SoilProfileReadFromDatabase, dbName), exception.Message);
        }

        [Test]
        [SetCulture("nl-NL")]
        public void ReadSoilProfiles_NLCompleteDatabase_Returns2ProfilesWithLayersAndGeometries()
        {
            ReadSoilProfiles_CompleteDatabase_Returns2ProfilesWithLayersAndGeometries();
        }

        [Test]
        [SetCulture("en-US")]
        public void ReadSoilProfiles_ENCompleteDatabase_Returns2ProfilesWithLayersAndGeometries()
        {
            ReadSoilProfiles_CompleteDatabase_Returns2ProfilesWithLayersAndGeometries();
        }

        private void ReadSoilProfiles_CompleteDatabase_Returns2ProfilesWithLayersAndGeometries()
        {
            // Setup
            var testFile = "complete.soil";
            var pipingSoilProfilesReader = new PipingSoilProfileReader(Path.Combine(testDataPath, testFile));

            // Call
            PipingSoilProfile[] result = pipingSoilProfilesReader.Read().ToArray();

            // Assert
            Assert.AreEqual(36, result.Length);
            CollectionAssert.AreEquivalent(new []
            {
                "10Y_005_STBI_p",
                "10Y_024_STBI_p",
                "10Y_041_STBI_p",
                "10Y_042_STBI_p",
                "10Y_043_STBI_p",
                "10Y_054_STBI_p",
                "10Y_066_STBI_p",
                "10Y_090_STBI_p",
                "10Y_102_STBI_p",
                "10Y_117_STBI_p",
                "10Y_130_STBI_p",
                "10Y_149_STBI_p",
                "10Z_157_STBI_p",
                "10Z_165_STBI_p",
                "10Z_181_STBI_p",
                "10Z_186_STBI_p",
                "10Z_199_STBI_p",
                "10Z_228_STBI_p",
                "10Z_258_STBI_p",
                "10Z_275_STBI_p",
                "10Z_282_STBI_p",
                "10Z_286_STBI_p",
                "10Z_311_STBI_p",
                "10Z_327_STBI_p",
                "10Z_352_STBI_p",
                "10Z_358_STBI_p",
                "10Z_369_STBI_p",
                "10Z_380_STBI_p",
                "10Z_390_STBI_p",
                "10Z_400_STBI_p",
                "10Z_421_STBI_p",
                "10Z_432_STBI_p",
                "10Z_460_STBI_p",
                "10Y_091_STBI_p",
                "10Y_005_STBI",
                "10Y_041_STBI"
            },result.Select(p => p.Name));

            CollectionAssert.AreEquivalent(new[]
            {
                -10,-12.0,-10.8,-10,-21.5,-21.5,-21.5,-22.0,-24.0,-21.5,-21.5,-22.0,-24.17,-24.8,-25.0,-24.0,-22.8,-23.8,-24.2,-24.5,-24.0,-23.7,-24.4,-24.0,-31.5,-23.2,-23.9,-23.1,-23.5,-23.125,-22.5,-21.88,-22.0,40.0,40.0,40.0
            }, result.Select(p => p.Bottom));

            CollectionAssert.AreEquivalent(new[]
            {
                6,3,2,3,2,2,2,2,3,2,2,2,2,3,3,3,2,2,2,2,3,2,3,3,2,2,3,2,2,2,2,2,2,1,1,1
            }, result.Select(p => p.Layers.Count()));

            var firstProfile = result.FirstOrDefault(l => l.Name == "10Y_005_STBI");
            Assert.NotNull(firstProfile);
            var expectedFirstProfileLayersTops = new[]
            {
                -3.5,
                -1.2,
                0.63,
                1.088434916,
                1.947578092,
                2.473341176
            };
            CollectionAssert.AllItemsAreUnique(firstProfile.Layers.Select(l => l.Top));
            Assert.AreEqual(6, firstProfile.Layers.Count(l => expectedFirstProfileLayersTops.Contains(l.Top, new DoubleComparer())));

            var secondProfile = result.FirstOrDefault(l => l.Name == "10Y_041_STBI");
            Assert.NotNull(secondProfile);
            var expectedSecondProfileLayersTops = new[]
            {
                -1.5,
                -1.180438596,
                0.333203067
            };
            CollectionAssert.AllItemsAreUnique(secondProfile.Layers.Select(l => l.Top));
            Assert.AreEqual(3, secondProfile.Layers.Count(l => expectedSecondProfileLayersTops.Contains(l.Top, new DoubleComparer())));
        }
    }

    internal class DoubleComparer : IEqualityComparer<double> {
        public bool Equals(double x, double y)
        {
            return Math.Abs(x - y) < Math2D.EpsilonForComparisons;
        }

        public int GetHashCode(double obj)
        {
            return obj.GetHashCode();
        }
    }
}