// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;
using System.ComponentModel;
using System.Diagnostics.Contracts;

/// <summary>
/// A container for all shared <see cref="AppContext"/> configuration switches for the MVVM Toolkit.
/// </summary>
internal static class Configuration
{
    /// <summary>
    /// The configuration property name for <see cref="IsINotifyPropertyChangingDisabled"/>.
    /// </summary>
    private const string DisableINotifyPropertyChangingSupport = "MVVMTOOLKIT_DISABLE_INOTIFYPROPERTYCHANGING";

    /// <summary>
    /// Indicates whether or not support for <see cref="INotifyPropertyChanging"/> is disabled.
    /// </summary>
    public static readonly bool IsINotifyPropertyChangingDisabled = GetConfigurationValue(DisableINotifyPropertyChangingSupport);

    /// <summary>
    /// Gets a configuration value for a specified property.
    /// </summary>
    /// <param name="propertyName">The property name to retrieve the value for.</param>
    /// <returns>The value of the specified configuration setting.</returns>
    [Pure]
    private static bool GetConfigurationValue(string propertyName)
    {
        if (AppContext.TryGetSwitch(propertyName, out bool isEnabled))
        {
            return isEnabled;
        }

        return false;
    }
}