using System.Text.Json;
using Omika.Core.Compatibility;
using Omika.Data.Connection;
using Omika.Data.HfSql.Connection;
using Omika.Data.SchemaDetection;

namespace Omika.Tests.Connection;


/// <summary>
/// Tests d'intégration OLE DB HFSQL réels.
///
/// Ces tests nécessitent un serveur HFSQL accessible et le provider OLE DB
/// <c>PCSOFT.HFSQL</c> installé. Ils sont ignorés automatiquement si la
/// configuration locale n'est pas disponible ou si le serveur est injoignable.
///
/// Aucun secret n'est affiché : les assertions portent uniquement sur les
/// modes d'accès observés.
/// </summary>
public class HfSqlOleDbIntegrationTests
{
    private const string ConfigPath = @"D:\Avalonia\Omika\config\hfsql-test.local.json";

    private sealed class TestConfig
    {
        public int Port { get; set; }
        public string Server { get; set; } = "";
        public string ProtectionPlusSecret { get; set; } = "";
        public FilePasswordsConfig FilePasswords { get; set; } = new();
        public DatabaseConfig Batik { get; set; } = new();
        public DatabaseConfig Omika { get; set; } = new();
    }

    private sealed class FilePasswordsConfig
    {
        public string? ProtectionStd { get; set; }
        public string? ProtectionPlus { get; set; }
    }

    private sealed class DatabaseConfig
    {
        public string Credential { get; set; } = "";
        public string Database { get; set; } = "";
        public string User { get; set; } = "";
        public string? OriginalDatabaseName { get; set; }
    }

    private static TestConfig? LoadConfig()
    {
        if (!File.Exists(ConfigPath))
            return null;

        try
        {
            var json = File.ReadAllText(ConfigPath);
            return JsonSerializer.Deserialize<TestConfig>(
                json,
                new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
        }
        catch
        {
            return null;
        }
    }

    private static HfSqlConnectionOptions BuildOptions(TestConfig config, DatabaseConfig db)
    {
        return new HfSqlConnectionOptions
        {
            Server = config.Server,
            Port = config.Port,
            Database = db.Database,
            User = db.User,
            Credential = db.Credential,
            FilePasswords = new HfSqlFilePasswordOptions
            {
                ProtectionStd = config.FilePasswords.ProtectionStd,
                ProtectionPlus = config.FilePasswords.ProtectionPlus
            }
        };
    }

    [Fact]
    public async Task ResolveAsync_Batik_Client_IsAccessible()
    {
        var config = LoadConfig();
        if (config is null)
            return; // config absente : test ignoré

        var options = BuildOptions(config, config.Batik);
        var factory = new HfSqlOleDbConnectionFactory();
        var resolver = new HfSqlFileAccessResolver(factory, options);

        var files = new List<HfSqlFileAccessProfile>
        {
            new() { LogicalFile = "Client", ExpectedGroup = "ProtectionStd" }
        };

        try
        {
            var result = await resolver.ResolveAsync(files);
            Assert.True(result["Client"].IsAccessible,
                $"Client Batik doit être accessible (mode observé : {result["Client"].ObservedAccess})");
        }
        catch (Exception ex) when (IsServerUnavailable(ex))
        {
            return; // serveur injoignable : test ignoré
        }
    }

    [Fact]
    public async Task ResolveAsync_Omika_Client_IsAccessible()
    {
        var config = LoadConfig();
        if (config is null)
            return;

        var options = BuildOptions(config, config.Omika);
        var factory = new HfSqlOleDbConnectionFactory();
        var resolver = new HfSqlFileAccessResolver(factory, options);

        var files = new List<HfSqlFileAccessProfile>
        {
            new() { LogicalFile = "Client", ExpectedGroup = "ProtectionStd" }
        };

        try
        {
            var result = await resolver.ResolveAsync(files);
            Assert.True(result["Client"].IsAccessible,
                $"Client Omika doit être accessible (mode observé : {result["Client"].ObservedAccess})");
        }
        catch (Exception ex) when (IsServerUnavailable(ex))
        {
            return;
        }
    }

    // --- Détection de schéma réelle (BATIK_TEST / OMIKA_TEST) -----------------

    [Fact]
    public async Task DetectAsync_BatikTest_ReturnsBatik()
    {
        var config = LoadConfig();
        if (config is null)
            return; // config absente : test ignoré

        var options = BuildOptions(config, config.Batik);
        var factory = new HfSqlOleDbConnectionFactory();
        await using var connection = new HfSqlOleDbConnection(factory, options);
        var detector = new DatabaseSchemaDetector(connection);

        try
        {
            var result = await detector.DetectAsync();
            Assert.True(result.IsSuccess,
                $"La détection Batik a échoué : {string.Join("; ", result.Errors)}");
            Assert.Equal(DatabaseSchemaVersion.Batik, result.Value);
        }
        catch (Exception ex) when (IsServerUnavailable(ex))
        {
            return; // serveur injoignable : test ignoré
        }
    }

    [Fact]
    public async Task DetectAsync_OmikaTest_ReturnsOmika()
    {
        var config = LoadConfig();
        if (config is null)
            return; // config absente : test ignoré

        var options = BuildOptions(config, config.Omika);
        var factory = new HfSqlOleDbConnectionFactory();
        await using var connection = new HfSqlOleDbConnection(factory, options);
        var detector = new DatabaseSchemaDetector(connection);

        try
        {
            var result = await detector.DetectAsync();
            Assert.True(result.IsSuccess,
                $"La détection Omika a échoué : {string.Join("; ", result.Errors)}");
            Assert.Equal(DatabaseSchemaVersion.Omika, result.Value);
        }
        catch (Exception ex) when (IsServerUnavailable(ex))
        {
            return; // serveur injoignable : test ignoré
        }
    }

    private static bool IsServerUnavailable(Exception ex)
    {
        // Le provider OLE DB peut lever des exceptions natives au teardown.
        // On ignore les erreurs de connexion (serveur injoignable) mais on
        // propage les erreurs de logique.
        var message = ex.Message;
        return message.Contains("provider", StringComparison.OrdinalIgnoreCase)
               || message.Contains("serveur", StringComparison.OrdinalIgnoreCase)
               || message.Contains("server", StringComparison.OrdinalIgnoreCase)
               || message.Contains("connexion", StringComparison.OrdinalIgnoreCase)
               || message.Contains("connection", StringComparison.OrdinalIgnoreCase)
               || message.Contains("E_FAIL", StringComparison.OrdinalIgnoreCase)
               || message.Contains("0x80004005", StringComparison.OrdinalIgnoreCase);
    }
}