using System.Globalization;
using Avalonia.Data.Converters;

namespace JdeScoping.SecureStoreManager.Converters;

/// <summary>
/// Inverts a boolean value.
/// </summary>
public class InverseBooleanConverter : IValueConverter
{
    /// <summary>
    /// Converts a boolean value to its inverted counterpart.
    /// </summary>
    /// <param name="value">The boolean value to invert.</param>
    /// <param name="targetType">The target type (ignored).</param>
    /// <param name="parameter">An optional parameter (ignored).</param>
    /// <param name="culture">The culture information (ignored).</param>
    /// <returns>The inverted boolean value, or false if the input is not a boolean.</returns>
    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        if (value is bool boolValue)
        {
            return !boolValue;
        }
        return false;
    }

    /// <summary>
    /// Converts a value back to a boolean by inverting it.
    /// </summary>
    /// <param name="value">The value to invert.</param>
    /// <param name="targetType">The target type (ignored).</param>
    /// <param name="parameter">An optional parameter (ignored).</param>
    /// <param name="culture">The culture information (ignored).</param>
    /// <returns>The inverted boolean value, or false if the input is not a boolean.</returns>
    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        if (value is bool boolValue)
        {
            return !boolValue;
        }
        return false;
    }
}

/// <summary>
/// Converts a boolean to a visibility icon (eye open/closed).
/// </summary>
public class BooleanToVisibilityIconConverter : IValueConverter
{
    /// <summary>
    /// Converts a boolean to a visibility icon string.
    /// </summary>
    /// <param name="value">The boolean value indicating visibility.</param>
    /// <param name="targetType">The target type (ignored).</param>
    /// <param name="parameter">An optional parameter (ignored).</param>
    /// <param name="culture">The culture information (ignored).</param>
    /// <returns>"Hide" if true, "Show" if false or input is not boolean.</returns>
    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        if (value is bool isVisible)
        {
            // Use simple text icons for cross-platform compatibility
            return isVisible ? "Hide" : "Show";
        }
        return "Show";
    }

    /// <summary>
    /// Converts a value back (not implemented for visibility icons).
    /// </summary>
    /// <param name="value">The value to convert back (ignored).</param>
    /// <param name="targetType">The target type (ignored).</param>
    /// <param name="parameter">An optional parameter (ignored).</param>
    /// <param name="culture">The culture information (ignored).</param>
    /// <returns>Not implemented.</returns>
    /// <exception cref="NotImplementedException">Always thrown.</exception>
    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

/// <summary>
/// Converts null to bool (null = false, not null = true).
/// </summary>
public class NullToBoolConverter : IValueConverter
{
    /// <summary>
    /// Converts a value to a boolean based on null status.
    /// </summary>
    /// <param name="value">The value to check for null.</param>
    /// <param name="targetType">The target type (ignored).</param>
    /// <param name="parameter">An optional parameter (ignored).</param>
    /// <param name="culture">The culture information (ignored).</param>
    /// <returns>True if value is not null, false otherwise.</returns>
    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        return value != null;
    }

    /// <summary>
    /// Converts a value back (not implemented for null checks).
    /// </summary>
    /// <param name="value">The value to convert back (ignored).</param>
    /// <param name="targetType">The target type (ignored).</param>
    /// <param name="parameter">An optional parameter (ignored).</param>
    /// <param name="culture">The culture information (ignored).</param>
    /// <returns>Not implemented.</returns>
    /// <exception cref="NotImplementedException">Always thrown.</exception>
    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

/// <summary>
/// Converts a string to bool (empty = false, not empty = true).
/// </summary>
public class StringToBoolConverter : IValueConverter
{
    /// <summary>
    /// Converts a string to a boolean based on whether it's empty or null.
    /// </summary>
    /// <param name="value">The string value to check.</param>
    /// <param name="targetType">The target type (ignored).</param>
    /// <param name="parameter">An optional parameter (ignored).</param>
    /// <param name="culture">The culture information (ignored).</param>
    /// <returns>True if string is not null or whitespace, false otherwise.</returns>
    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        if (value is string str)
        {
            return !string.IsNullOrWhiteSpace(str);
        }
        return false;
    }

    /// <summary>
    /// Converts a value back (not implemented for string checks).
    /// </summary>
    /// <param name="value">The value to convert back (ignored).</param>
    /// <param name="targetType">The target type (ignored).</param>
    /// <param name="parameter">An optional parameter (ignored).</param>
    /// <param name="culture">The culture information (ignored).</param>
    /// <returns>Not implemented.</returns>
    /// <exception cref="NotImplementedException">Always thrown.</exception>
    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}