using System.Reflection;
using System.Text.Json;
using System.IO;
using NUnit.Framework;

namespace ComplianceNFs.Tests
{
    [TestFixture]
    public class AuditComplianceNFsTest
    {
        private readonly string solutionRoot = @"x:\Back\Carteira x.x\Codigo\ComplianceNFs";

        [Test]
        public void ProjectStructure_ShouldContainAllProjects()
        {
            var expectedProjects = new[]
            {
                "ComplianceNFs.Core",
                "ComplianceNFs.Infrastructure",
                "ComplianceNFs.Service",
                "ComplianceNFs.Monitor"
            };
            foreach (var proj in expectedProjects)
            {
                var csproj = Directory.GetFiles(solutionRoot, $"{proj}.csproj", SearchOption.AllDirectories).FirstOrDefault();
                NUnit.Framework.Assert.That(csproj, Is.Not.Null, $"Project {proj} not found.");
            }
        }

        [Test]
        public void CoreProject_ShouldContainRequiredTypesAndInterfaces()
        {
            var coreDll = Directory.GetFiles(solutionRoot, "ComplianceNFs.Core.dll", SearchOption.AllDirectories).FirstOrDefault();
            NUnit.Framework.Assert.That(coreDll, NUnit.Framework.Is.Not.Null, "ComplianceNFs.Core.dll not found. Build the solution first.");
            var asm = Assembly.LoadFrom(coreDll!);
            NUnit.Framework.Assert.That(asm.GetType("ComplianceNFs.Core.BuyingRecord"), NUnit.Framework.Is.Not.Null, "BuyingRecord class missing.");
            NUnit.Framework.Assert.That(asm.GetType("ComplianceNFs.Core.EnergyInvoice"), NUnit.Framework.Is.Not.Null, "EnergyInvoice class missing.");
            NUnit.Framework.Assert.That(asm.GetType("ComplianceNFs.Core.InvoiceStatus"), NUnit.Framework.Is.Not.Null, "InvoiceStatus enum missing.");
            var interfaces = new[]
            {
                "IMailListener",
                "IXmlParser",
                "IPdfParser",
                "IAccessDbRepository",
                "IAttachmentRepository"
            };
            foreach (var iface in interfaces)
            {
                NUnit.Framework.Assert.That(asm.GetType($"ComplianceNFs.Core.{iface}"), NUnit.Framework.Is.Not.Null, $"Interface {iface} missing.");
            }
        }

        [Test]
        public void InfrastructureProject_ShouldImplementCoreInterfaces()
        {
            var infraDll = Directory.GetFiles(solutionRoot, "ComplianceNFs.Infrastructure.dll", SearchOption.AllDirectories).FirstOrDefault();
            var coreDll = Directory.GetFiles(solutionRoot, "ComplianceNFs.Core.dll", SearchOption.AllDirectories).FirstOrDefault();
            NUnit.Framework.Assert.That(infraDll, NUnit.Framework.Is.Not.Null, "ComplianceNFs.Infrastructure.dll not found.");
            NUnit.Framework.Assert.That(coreDll, NUnit.Framework.Is.Not.Null, "ComplianceNFs.Core.dll not found.");
            var infraAsm = Assembly.LoadFrom(infraDll!);
            var coreAsm = Assembly.LoadFrom(coreDll!);
            var interfaceImpls = new (string iface, string impl)[]
            {
                ("IMailListener", "MailListener"),
                ("IXmlParser", "XmlParser"),
                ("IPdfParser", "PdfParser"),
                ("IAccessDbRepository", "AccessDbRepository"),
                ("IAttachmentRepository", "AttachmentRepository")
            };
            foreach (var (iface, impl) in interfaceImpls)
            {
                var ifaceType = coreAsm.GetType($"ComplianceNFs.Core.{iface}");
                var implType = infraAsm.GetType($"ComplianceNFs.Infrastructure.{impl}");
                NUnit.Framework.Assert.That(implType, NUnit.Framework.Is.Not.Null, $"Implementation {impl} missing.");
                NUnit.Framework.Assert.That(ifaceType, NUnit.Framework.Is.Not.Null, $"Interface {iface} missing in core assembly.");
                NUnit.Framework.Assert.That(ifaceType!.IsAssignableFrom(implType!), NUnit.Framework.Is.True, $"{impl} does not implement {iface}.");
            }
            var archiver = infraAsm.GetTypes().FirstOrDefault(t =>
                t.Name.Contains("Archiver") || t.Name.Contains("FileArchiver"));
            NUnit.Framework.Assert.That(archiver, NUnit.Framework.Is.Not.Null, "FileArchiver or equivalent not found.");
        }

        [Test]
        public void ServiceProject_ShouldUseGenericHostAndRegisterServices()
        {
            var serviceDir = Directory.GetDirectories(solutionRoot, "ComplianceNFs.Service", SearchOption.TopDirectoryOnly).FirstOrDefault();
            NUnit.Framework.Assert.That(serviceDir, NUnit.Framework.Is.Not.Null, "ComplianceNFs.Service directory not found.");
            var programFile = Directory.GetFiles(serviceDir!, "Program.cs", SearchOption.AllDirectories).FirstOrDefault();
            NUnit.Framework.Assert.That(programFile, NUnit.Framework.Is.Not.Null, "Program.cs not found in Service project.");
            var code = File.ReadAllText(programFile!);
            NUnit.Framework.Assert.That(code.Contains("Host.CreateDefaultBuilder"), NUnit.Framework.Is.True, "Generic Host not used.");
            NUnit.Framework.Assert.That(code.Contains("ConfigureServices"), NUnit.Framework.Is.True, "DI registration missing.");
            NUnit.Framework.Assert.That(code.Contains("MailListener"), NUnit.Framework.Is.True, "MailListener not referenced in startup.");
            NUnit.Framework.Assert.That(code.Contains("appsettings.json"), NUnit.Framework.Is.True, "appsettings.json not referenced.");
        }

        [Test]
        public void MonitorProject_ShouldContainWPFArtifacts()
        {
            var monitorDir = Directory.GetDirectories(solutionRoot, "ComplianceNFs.Monitor", SearchOption.TopDirectoryOnly).FirstOrDefault();
            NUnit.Framework.Assert.That(monitorDir, NUnit.Framework.Is.Not.Null, "ComplianceNFs.Monitor directory not found.");
            NUnit.Framework.Assert.That(File.Exists(Path.Combine(monitorDir!, "MainWindow.xaml")), NUnit.Framework.Is.True, "MainWindow.xaml missing.");
            NUnit.Framework.Assert.That(File.Exists(Path.Combine(monitorDir!, "MonitorViewModel.cs")), NUnit.Framework.Is.True, "MonitorViewModel.cs missing.");
            var mainWindowCode = File.ReadAllText(Path.Combine(monitorDir!, "MainWindow.xaml"));
            NUnit.Framework.Assert.That(mainWindowCode.Contains("Force Scan"), NUnit.Framework.Is.True, "Force Scan button not found in MainWindow.xaml.");
        }

        [Test]
        public void AppSettings_ShouldContainRequiredKeys()
        {
            var appsettings = Directory.GetFiles(solutionRoot, "appsettings.json", SearchOption.AllDirectories).FirstOrDefault();
            NUnit.Framework.Assert.That(appsettings, NUnit.Framework.Is.Not.Null, "appsettings.json not found.");
            var json = File.ReadAllText(appsettings!);
            using var doc = JsonDocument.Parse(json);
            var root = doc.RootElement;
            NUnit.Framework.Assert.That(root.TryGetProperty("AccessConnectionString", out _), NUnit.Framework.Is.True, "AccessConnectionString missing.");
            NUnit.Framework.Assert.That(root.TryGetProperty("PostgresConnectionString", out _), NUnit.Framework.Is.True, "PostgresConnectionString missing.");
            NUnit.Framework.Assert.That(root.TryGetProperty("Mail", out _), NUnit.Framework.Is.True, "Mail settings missing.");
            NUnit.Framework.Assert.That(root.TryGetProperty("Tolerances", out _), NUnit.Framework.Is.True, "Tolerances missing.");
            NUnit.Framework.Assert.That(root.TryGetProperty("ArchiveBasePath", out _), NUnit.Framework.Is.True, "ArchiveBasePath missing.");
        }

        [Test]
        public void MatchingService_ShouldApplyTolerances()
        {
            // This is a stub: in a real test, instantiate MatchingService and test with in-memory data.
            NUnit.Framework.Assert.Pass("Stub: Implement in-memory test for MatchingService tolerances (±1%, ±0.5%).");
        }

        [Test]
        public void ComplianceService_ShouldComputeImpliedTaxWithinTolerance()
        {
            // This is a stub: in a real test, instantiate ComplianceService and test with in-memory data.
            NUnit.Framework.Assert.Pass("Stub: Implement in-memory test for ComplianceService implied tax logic (±1%).");
        }

        [Test]
        public void NotificationService_ShouldSendEmailOnMismatch()
        {
            // This is a stub: in a real test, mock NotificationService and verify email send on mismatch.
            NUnit.Framework.Assert.Pass("Stub: Implement NotificationService email send test.");
        }

        [Test]
        public void ArchivingService_ShouldMoveFilesToStatusFolders()
        {
            // This is a stub: in a real test, mock file system and verify archiving logic.
            NUnit.Framework.Assert.Pass("Stub: Implement ArchivingService file move test.");
        }
    }
}