using System.Globalization;
using Centron.BusinessLogic.Administration.Masterdata;
using Centron.DAO;
using Centron.DAO.Mappings;
using Centron.DAO.Mappings.Administration;
using Centron.Data.Entities.Administration.MasterData;
using FluentNHibernate.Cfg;
using FluentNHibernate.Cfg.Db;
using JetBrains.Annotations;
using NHibernate;
using NHibernate.Tool.hbm2ddl;

namespace Centron.Tests.BL.Administration.Masterdata;

/// <summary>
/// Tests for the AssetConditionBL class, specifically testing the BR-DE-18 Skonto formatting
/// for ZUGFeRD/XRechnung export functionality.
/// </summary>
[TestSubject(typeof(AssetConditionBL))]
public class AssetConditionBLTest
{
    [Fact]
    public void GetPaymentConditionSkontoInBR_DE_18Format_ReturnsNull_WhenNoConditionExists()
    {
        // Arrange
        using var session = CreateSession();
        var daoSession = new DAOSession(session);
        var sut = new AssetConditionBL(daoSession);
        var nonExistentI3D = 999;

        // Act
        var result = sut.GetPaymentConditionSkontoInBR_DE_18Format(nonExistentI3D);

        // Assert
        Assert.Null(result);
    }

    [Fact]
    public void GetPaymentConditionSkontoInBR_DE_18Format_ReturnsNull_WhenNoSkontoData()
    {
        // Arrange
        using var session = CreateSession();
        var condition = new AssetCondition
        {
            ShortName = "NO_SKONTO",
            Skonto1OffDay = 0,
            Skonto1Percent = 0,
            Skonto2OffDay = 0,
            Skonto2Percent = 0
        };
        session.Save(condition);
        session.Flush();

        var daoSession = new DAOSession(session);
        var sut = new AssetConditionBL(daoSession);

        // Act
        var result = sut.GetPaymentConditionSkontoInBR_DE_18Format(condition.I3D);

        // Assert
        Assert.Null(result);
    }

    [Fact]
    public void GetPaymentConditionSkontoInBR_DE_18Format_FormatsCorrectly_WhenSingleSkontoLevel()
    {
        // Arrange
        using var session = CreateSession();
        var condition = new AssetCondition
        {
            ShortName = "SKONTO_14_2.5",
            Skonto1OffDay = 14,
            Skonto1Percent = 2.5,
            Skonto2OffDay = 0,
            Skonto2Percent = 0
        };
        session.Save(condition);
        session.Flush();

        var daoSession = new DAOSession(session);
        var sut = new AssetConditionBL(daoSession);

        // Act
        var result = sut.GetPaymentConditionSkontoInBR_DE_18Format(condition.I3D);

        // Assert
        Assert.Equal("#SKONTO#TAGE=14#PROZENT=2.50#", result);
    }

    [Fact]
    public void GetPaymentConditionSkontoInBR_DE_18Format_FormatsCorrectly_WhenTwoSkontoLevels()
    {
        // Arrange
        using var session = CreateSession();
        var condition = new AssetCondition
        {
            ShortName = "SKONTO_MULTI",
            Skonto1OffDay = 10,
            Skonto1Percent = 3.0,
            Skonto2OffDay = 30,
            Skonto2Percent = 1.5
        };
        session.Save(condition);
        session.Flush();

        var daoSession = new DAOSession(session);
        var sut = new AssetConditionBL(daoSession);

        // Act
        var result = sut.GetPaymentConditionSkontoInBR_DE_18Format(condition.I3D);

        // Assert
        Assert.Equal($"#SKONTO#TAGE=10#PROZENT=3.00#{Environment.NewLine}#SKONTO#TAGE=30#PROZENT=1.50#", result);
    }

    [Fact]
    public void GetPaymentConditionSkontoInBR_DE_18Format_UsesInvariantCulture_WhenGermanCultureIsSet()
    {
        // Arrange
        var originalCulture = Thread.CurrentThread.CurrentCulture;
        try
        {
            Thread.CurrentThread.CurrentCulture = new CultureInfo("de-DE");

            using var session = CreateSession();
            var condition = new AssetCondition
            {
                ShortName = "SKONTO_DE",
                Skonto1OffDay = 14,
                Skonto1Percent = 2.75,
                Skonto2OffDay = 0,
                Skonto2Percent = 0
            };
            session.Save(condition);
            session.Flush();

            var daoSession = new DAOSession(session);
            var sut = new AssetConditionBL(daoSession);

            // Act
            var result = sut.GetPaymentConditionSkontoInBR_DE_18Format(condition.I3D);

            // Assert
            Assert.Equal("#SKONTO#TAGE=14#PROZENT=2.75#", result);
            Assert.DoesNotContain(",", result); // Should use dot, not comma
        }
        finally
        {
            Thread.CurrentThread.CurrentCulture = originalCulture;
        }
    }

    [Fact]
    public void GetPaymentConditionSkontoInBR_DE_18Format_ReturnsCorrectFormat_WhenOnlySkonto2HasData()
    {
        // Arrange
        using var session = CreateSession();
        var condition = new AssetCondition
        {
            ShortName = "SKONTO2_ONLY",
            Skonto1OffDay = 0,
            Skonto1Percent = 0,
            Skonto2OffDay = 21,
            Skonto2Percent = 1.25
        };
        session.Save(condition);
        session.Flush();

        var daoSession = new DAOSession(session);
        var sut = new AssetConditionBL(daoSession);

        // Act
        var result = sut.GetPaymentConditionSkontoInBR_DE_18Format(condition.I3D);

        // Assert
        Assert.Equal("#SKONTO#TAGE=21#PROZENT=1.25#", result);
    }

    [Theory]
    [InlineData(14, 0)]  // Days without percent
    [InlineData(0, 2.5)] // Percent without days
    public void GetPaymentConditionSkontoInBR_DE_18Format_ReturnsNull_WhenIncompleteData(int days, double percent)
    {
        // Arrange
        using var session = CreateSession();
        var condition = new AssetCondition
        {
            ShortName = "INCOMPLETE",
            Skonto1OffDay = days,
            Skonto1Percent = percent,
            Skonto2OffDay = 0,
            Skonto2Percent = 0
        };
        session.Save(condition);
        session.Flush();

        var daoSession = new DAOSession(session);
        var sut = new AssetConditionBL(daoSession);

        // Act
        var result = sut.GetPaymentConditionSkontoInBR_DE_18Format(condition.I3D);

        // Assert
        Assert.Null(result);
    }

    [Theory]
    [InlineData(7, 0.5, "#SKONTO#TAGE=7#PROZENT=0.50#")]
    [InlineData(5, 10.99, "#SKONTO#TAGE=5#PROZENT=10.99#")]
    [InlineData(365, 99.99, "#SKONTO#TAGE=365#PROZENT=99.99#")]
    public void GetPaymentConditionSkontoInBR_DE_18Format_HandlesEdgeCases_Correctly(int days, double percent, string expected)
    {
        // Arrange
        using var session = CreateSession();
        var condition = new AssetCondition
        {
            ShortName = "EDGE_CASE",
            Skonto1OffDay = days,
            Skonto1Percent = percent,
            Skonto2OffDay = 0,
            Skonto2Percent = 0
        };
        session.Save(condition);
        session.Flush();

        var daoSession = new DAOSession(session);
        var sut = new AssetConditionBL(daoSession);

        // Act
        var result = sut.GetPaymentConditionSkontoInBR_DE_18Format(condition.I3D);

        // Assert
        Assert.Equal(expected, result);
    }

    private static ISession CreateSession()
    {
        var fluentConfig = Fluently.Configure()
            .Database(SQLiteConfiguration.Standard.InMemory())
            .Mappings(m =>
            {
                m.FluentMappings.Add<AssetConditionMaps>();
            });

        var sessionFactory = fluentConfig.BuildSessionFactory();
        var session = sessionFactory.OpenSession();

        // Create schema in the in-memory database
        new SchemaExport(fluentConfig.BuildConfiguration())
            .Execute(false, true, false, session.Connection, null);

        return session;
    }
}