using System;
using CeresSharp.Native;
using CeresSharp.Native.SafeHandles;

namespace CeresSharp.Advanced;

/// <summary>
/// Options for gradient checking.
/// </summary>
public sealed class GradientCheckerOptions : IDisposable
{
    private readonly GradientCheckerOptionsHandle _handle;
    private bool _disposed;

    /// <summary>
    /// Creates a new GradientCheckerOptions instance with default settings.
    /// </summary>
    public GradientCheckerOptions()
    {
        _handle = GradientCheckerOptionsHandle.Create();
    }

    /// <summary>
    /// Gets the native handle.
    /// </summary>
    internal GradientCheckerOptionsHandle Handle => _handle;

    /// <summary>
    /// Gets or sets the gradient check relative precision.
    /// </summary>
    public double GradientCheckRelativePrecision
    {
        get => CeresNative.ceres_wrapper_gradient_checker_options_get_gradient_check_relative_precision(_handle.DangerousGetHandle());
        set => CeresNative.ceres_wrapper_gradient_checker_options_set_gradient_check_relative_precision(_handle.DangerousGetHandle(), value);
    }

    /// <summary>
    /// Gets or sets the numeric derivative relative step size.
    /// </summary>
    public double NumericDerivativeRelativeStepSize
    {
        get => CeresNative.ceres_wrapper_gradient_checker_options_get_gradient_check_numeric_derivative_relative_step_size(_handle.DangerousGetHandle());
        set => CeresNative.ceres_wrapper_gradient_checker_options_set_gradient_check_numeric_derivative_relative_step_size(_handle.DangerousGetHandle(), value);
    }

    public void Dispose()
    {
        if (!_disposed)
        {
            _handle?.Dispose();
            _disposed = true;
        }
    }
}