using System.Globalization;

namespace EnvelopeGenerator.Application.SQL;

/// <summary>
/// Extension method for converting objects to SQL parameter strings.
/// </summary>
public static class ParamsExtensions
{
    /// <summary>
    /// Converts a .NET object to its corresponding SQL-safe parameter string.
    /// </summary>
    /// <param name="obj">The object to convert.</param>
    /// <returns>A string representing the SQL parameter.</returns>
    public static string ToSqlParam(this object? obj)
    {
        if (obj is null)
            return "NULL";
        else if (obj is string strVal)
            return $"'{strVal}'";
        else if (obj is bool boolVal)
            return boolVal ? "1" : "0";
        else if (obj is double doubleVal)
            return $"'{doubleVal.ToString(CultureInfo.InvariantCulture)}'";
        else if (obj is int intVal)
            return intVal.ToString();
        else
            throw new NotSupportedException($"Type '{obj.GetType().FullName}' is not supported for SQL parameter conversion.");
    }
}