// 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.Threading;
using System.Threading.Tasks;
using Roslyn.Utilities;

namespace Microsoft.CodeAnalysis.Navigation;

internal interface INavigableLocation
{
    /// <summary>
    /// Navigates to a location opening or presenting it in a UI if necessary.  This work must happen quickly. Any
    /// expensive async work must be done by whatever component creates this value. This method is async only to
    /// allow final clients to call this from a non-UI thread while allowing the navigation to jump to the UI
    /// thread.
    /// </summary>
    Task<bool> NavigateToAsync(NavigationOptions options, CancellationToken cancellationToken);
}

internal sealed class NavigableLocation(Func<NavigationOptions, CancellationToken, Task<bool>> callback) : INavigableLocation
{
    private readonly Func<NavigationOptions, CancellationToken, Task<bool>> _callback = callback;

    public Task<bool> NavigateToAsync(NavigationOptions options, CancellationToken cancellationToken)
    {
        cancellationToken.ThrowIfCancellationRequested();
        return _callback(options, cancellationToken);
    }

    public static class TestAccessor
    {
#pragma warning disable VSTHRD200 // Use "Async" suffix for async methods
        public static Task<INavigableLocation?> Create(bool value)
#pragma warning restore VSTHRD200 // Use "Async" suffix for async methods
        {
            return Task.FromResult<INavigableLocation?>(
                new NavigableLocation((_, _) => value ? SpecializedTasks.True : SpecializedTasks.False));
        }
    }
}