using Omika.HfSqlProbe;

namespace Omika.Tests.Tools;

/// <summary>
/// Tests unitaires du probe HFSQL ODBC — appelle les VRAIES classes
/// du projet <c>Omika.HfSqlProbe</c>. Aucune connexion réelle.
/// </summary>
public class HfSqlProbeTests
{
    // =========================================================================
    // SqlIdentifierValidator
    // =========================================================================

    [Theory]
    [InlineData("Client")]
    [InlineData("ProbeTest")]
    [InlineData("CL_PKID")]
    [InlineData("Marker")]
    [InlineData("a")]
    [InlineData("A")]
    [InlineData("_")]
    [InlineData("_test")]
    [InlineData("Client123")]
    [InlineData("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_____")]
    public void ValidateSqlIdentifier_ValidNames_Accepted(string name)
    {
        Assert.True(SqlIdentifierValidator.IsValid(name),
            $"Valid identifier rejected: '{name}'");
        _ = SqlIdentifierValidator.Validate(name);
    }

    [Theory]
    [InlineData("")]
    [InlineData(" ")]
    [InlineData("123Client")]   // starts with digit
    [InlineData("Client;DROP TABLE")]
    [InlineData("Client--")]
    [InlineData("Client/*x*/")]
    [InlineData("Client x")]
    [InlineData("Client\t")]
    [InlineData("Client\n")]
    [InlineData("Client\r")]
    [InlineData("Client\r\n")]
    [InlineData("Client\nDROP")]
    [InlineData("Client'")]
    [InlineData("Client\"")]
    [InlineData("[Client]")]
    [InlineData("`Client`")]
    [InlineData("Client.Name")]
    [InlineData("Client\\Name")]
    [InlineData("C lien")]
    [InlineData("C;DROP")]
    public void ValidateSqlIdentifier_InvalidNames_Rejected(string name)
    {
        Assert.False(SqlIdentifierValidator.IsValid(name),
            $"Invalid identifier accepted: '{name}'");
        Assert.Throws<ArgumentException>(() => SqlIdentifierValidator.Validate(name));
    }

    // =========================================================================
    // ConnectionStringRedactor
    // =========================================================================

    [Fact]
    public void Redact_RemovesPWD()
    {
        string input = "DSN=Test;PWD=MySecret123;UID=admin;Database=TestDB";
        string result = ConnectionStringRedactor.Redact(input);
        Assert.DoesNotContain("MySecret123", result);
        Assert.Contains("PWD=***", result);
    }

    [Fact]
    public void Redact_RemovesUID()
    {
        string input = "DSN=Test;UID=admin123;PWD=pass";
        string result = ConnectionStringRedactor.Redact(input);
        Assert.DoesNotContain("admin123", result);
        Assert.Contains("UID=***", result);
    }

    [Fact]
    public void Redact_RemovesPasswordKey()
    {
        string input = "DSN=Test;Password=SuperSecret;Server=localhost";
        string result = ConnectionStringRedactor.Redact(input);
        Assert.DoesNotContain("SuperSecret", result);
    }

    [Fact]
    public void Redact_PreservesNonCredentials()
    {
        string input = "DSN=HFSQL_Test;Server=localhost;Database=TestDB";
        string result = ConnectionStringRedactor.Redact(input);
        Assert.Contains("DSN=HFSQL_Test", result);
        Assert.Contains("Server=localhost", result);
        Assert.Contains("Database=TestDB", result);
    }

    [Fact]
    public void Redact_CaseInsensitive()
    {
        string input = "DSN=X;pwd=secret123";
        string result = ConnectionStringRedactor.Redact(input);
        Assert.DoesNotContain("secret123", result);
        Assert.Contains("PWD=***", result);
    }

    [Fact]
    public void Redact_SpecialCharsInPassword()
    {
        string input = "DSN=X;Password=aB12!@#$";
        string result = ConnectionStringRedactor.Redact(input);
        Assert.DoesNotContain("aB12!@#$", result);
    }

    [Fact]
    public void Redact_EmptyPassword_Works()
    {
        string input = "DSN=X;PWD=;Server=Y";
        string result = ConnectionStringRedactor.Redact(input);
        Assert.Contains("PWD=***", result);
    }

    // =========================================================================
    // ProbeArgumentParser
    // =========================================================================

    [Theory]
    [InlineData("capabilities")]
    [InlineData("CAPABILITIES")]
    [InlineData("Capabilities")]
    public void NormalizeCommand_RecognizesCapabilities(string cmd)
    {
        Assert.Equal("capabilities", ProbeArgumentParser.NormalizeCommand([cmd]));
    }

    [Fact]
    public void NormalizeCommand_EmptyArgs_ReturnsEmpty()
    {
        Assert.Equal("", ProbeArgumentParser.NormalizeCommand([]));
    }

    [Theory]
    [InlineData("")]
    [InlineData("unknown")]
    public void IsValidCommand_RejectsUnknown(string cmd)
    {
        Assert.False(ProbeArgumentParser.IsValidCommand(cmd));
    }

    [Theory]
    [InlineData("capabilities")]
    [InlineData("transaction")]
    [InlineData("returning")]
    [InlineData("omika-guid")]
    [InlineData("--help")]
    public void IsValidCommand_AcceptsKnown(string cmd)
    {
        Assert.True(ProbeArgumentParser.IsValidCommand(cmd));
    }

    [Fact]
    public void Parse_ParsesConnectionStringOption()
    {
        var options = ProbeArgumentParser.Parse(
            ["--connection-string", "DSN=Test;UID=u;PWD=p"]);
        Assert.Equal("DSN=Test;UID=u;PWD=p", options.ConnectionString);
    }

    [Fact]
    public void Parse_ParsesAllowWriteProbeFlag()
    {
        var options = ProbeArgumentParser.Parse(["--allow-write-probe"]);
        Assert.True(options.AllowWriteProbe);
    }

    [Fact]
    public void Parse_ParsesTableAndIdColumn()
    {
        var options = ProbeArgumentParser.Parse(
            ["--table", "MyTable", "--id-column", "PKID"]);
        Assert.Equal("MyTable", options.Table);
        Assert.Equal("PKID", options.IdColumn);
    }

    [Fact]
    public void Parse_ParsesSchema()
    {
        var options = ProbeArgumentParser.Parse(["--schema", "batik"]);
        Assert.Equal("batik", options.Schema);
    }

    [Fact]
    public void Parse_DoesNotSetAllowWriteProbeByDefault()
    {
        var options = ProbeArgumentParser.Parse([]);
        Assert.False(options.AllowWriteProbe);
    }

    // =========================================================================
    // Write gate
    // =========================================================================

    [Theory]
    [InlineData("transaction")]
    [InlineData("returning")]
    public void IsWriteCommand_WriteCommandsRequireGate(string cmd)
    {
        Assert.True(ProbeArgumentParser.IsWriteCommand(cmd),
            $"'{cmd}' must require --allow-write-probe.");
    }

    [Theory]
    [InlineData("capabilities")]
    [InlineData("")]
    [InlineData("unknown")]
    public void IsWriteCommand_ReadCommandsDoNotRequireGate(string cmd)
    {
        Assert.False(ProbeArgumentParser.IsWriteCommand(cmd));
    }

    // =========================================================================
    // ProbeSqlBuilder
    // =========================================================================

    [Fact]
    public void SqlBuilder_InsertReturning_ValidatesAllIdentifiers()
    {
        string sql = ProbeSqlBuilder.BuildInsertReturning("TestTable", "TestPKID", "Marker");
        Assert.Contains("INSERT INTO TestTable", sql);
        Assert.Contains("VALUES (?)", sql);
        Assert.Contains("RETURNING TestPKID", sql);
        Assert.DoesNotContain("'", sql);
    }

    [Fact]
    public void SqlBuilder_RejectsInvalidTable()
    {
        var ex = Assert.Throws<ArgumentException>(
            () => ProbeSqlBuilder.BuildInsertReturning("Bad;DROP", "PKID", "Marker"));
        Assert.Contains("Bad;DROP", ex.Message);
    }

    [Fact]
    public void SqlBuilder_RejectsInvalidMarkerColumn()
    {
        Assert.Throws<ArgumentException>(
            () => ProbeSqlBuilder.BuildInsertMarker("Table", "x y"));
    }

    [Fact]
    public void SqlBuilder_RejectsInvalidIdColumn()
    {
        Assert.Throws<ArgumentException>(
            () => ProbeSqlBuilder.BuildInsertReturning("Table", "PKID--", "M"));
    }

    [Fact]
    public void SqlBuilder_CountByMarker_Parameterized()
    {
        string sql = ProbeSqlBuilder.BuildCountByMarker("TestTable", "Marker");
        Assert.Contains("SELECT COUNT(*)", sql);
        Assert.Contains("WHERE Marker = ?", sql);
        Assert.DoesNotContain("'", sql);
    }

    [Fact]
    public void SqlBuilder_InsertMarker_Parameterized()
    {
        string sql = ProbeSqlBuilder.BuildInsertMarker("T", "Col");
        Assert.Contains("INSERT INTO T (Col)", sql);
        Assert.Contains("VALUES (?)", sql);
    }
}