namespace SQLInsight.Connectivity.Tests;

public class ConnectionStringsTests
{
    [Fact]
    public void SqlClient_defaults_to_mandatory_encryption_with_certificate_validation()
    {
        var cs = ConnectionStrings.ForSqlClient(new ConnectionTarget { Server = "sql01" });

        Assert.Contains("Encrypt=True", cs, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("Trust Server Certificate=True", cs, StringComparison.OrdinalIgnoreCase);
        Assert.Contains("Integrated Security=True", cs, StringComparison.OrdinalIgnoreCase);
        Assert.Contains("Application Name=\"SQLInsight Pro\"", cs, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public void Odbc_uses_configured_driver_and_sql_login()
    {
        var cs = ConnectionStrings.ForOdbc(new ConnectionTarget
        {
            Server = "legacy01",
            Authentication = AuthenticationMode.SqlLogin,
            UserName = "sqlinsight",
            Password = "secret",
            Encryption = EncryptionMode.Optional,
            OdbcDriver = "SQL Server",
        });

        Assert.Contains("Driver={SQL Server}", cs, StringComparison.OrdinalIgnoreCase);
        Assert.Contains("UID=sqlinsight", cs, StringComparison.OrdinalIgnoreCase);
        Assert.Contains("Encrypt=no", cs, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("Trusted_Connection", cs, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public void Sql_login_without_user_name_is_rejected()
    {
        var target = new ConnectionTarget { Server = "sql01", Authentication = AuthenticationMode.SqlLogin };

        Assert.Throws<ArgumentException>(() => ConnectionStrings.ForSqlClient(target));
    }
}

public class EntraTests
{
    [Fact]
    public void Entra_connection_string_carries_no_credentials()
    {
        var cs = ConnectionStrings.ForSqlClient(new ConnectionTarget { Server = "mi.abc.database.windows.net", Authentication = AuthenticationMode.EntraManagedIdentity });

        Assert.DoesNotContain("Integrated Security=True", cs, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("User ID", cs, StringComparison.OrdinalIgnoreCase);
        Assert.DoesNotContain("Password", cs, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public void Entra_is_not_offered_over_odbc()
    {
        Assert.Throws<NotSupportedException>(() => ConnectionStrings.ForOdbc(new ConnectionTarget { Server = "x", Authentication = AuthenticationMode.EntraDefault }));
    }

    [Theory]
    [InlineData(AuthenticationMode.EntraManagedIdentity, "Azure.Identity.ManagedIdentityCredential")]
    [InlineData(AuthenticationMode.EntraDefault, "Azure.Identity.DefaultAzureCredential")]
    public void Credential_type_follows_the_mode(AuthenticationMode mode, string type)
    {
        Assert.Equal(type, EntraCredentials.For(new ConnectionTarget { Server = "x", Authentication = mode }).GetType().FullName);
    }

    [Fact]
    public void Service_principal_needs_tenant_client_and_secret()
    {
        Assert.Throws<ArgumentException>(() => EntraCredentials.For(new ConnectionTarget { Server = "x", Authentication = AuthenticationMode.EntraServicePrincipal, UserName = "client" }));
    }
}