// 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.Threading.Tasks;
using Microsoft.CodeAnalysis.Text;
using Microsoft.VisualStudio.Language.Intellisense.AsyncCompletion;
using Microsoft.VisualStudio.Language.Intellisense.AsyncCompletion.Data;
using Microsoft.VisualStudio.Text;
using Microsoft.VisualStudio.Text.Editor;
using RoslynCompletionList = Microsoft.CodeAnalysis.Completion.CompletionList;
 
namespace Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.AsyncCompletion;
 
/// <summary>
/// Contains data need to be tracked over an entire IAsyncCompletionSession completion
/// session for various operations.
/// </summary>
internal sealed class CompletionSessionData
{
    private const string RoslynCompletionSessionData = nameof(RoslynCompletionSessionData);
    public bool TargetTypeFilterSelected { get; set; }
    public bool HasSuggestionItemOptions { get; set; }
 
    public SnapshotPoint? ExpandedItemTriggerLocation { get; set; }
    public TextSpan? CompletionListSpan { get; set; }
    public CompletionList<CompletionItem>? CombinedSortedList { get; set; }
    public Task<(CompletionContext, RoslynCompletionList)>? ExpandedItemsTask { get; set; }
    public bool IsExclusive { get; set; }
    public bool NonBlockingCompletionEnabled { get; }
 
    private CompletionSessionData(IAsyncCompletionSession session)
    {
        // Editor has to separate options control the behavior of block waiting computation of completion items.
        // When set to true, `NonBlockingCompletionOptionId` takes precedence over `ResponsiveCompletionOptionId`
        // and is equivalent to `ResponsiveCompletionOptionId` to true and `ResponsiveCompletionThresholdOptionId` to 0.
        var nonBlockingCompletionEnabled = session.TextView.Options.GetOptionValue(DefaultOptions.NonBlockingCompletionOptionId);
        var responsiveCompletionEnabled = session.TextView.Options.GetOptionValue(DefaultOptions.ResponsiveCompletionOptionId);
        NonBlockingCompletionEnabled = nonBlockingCompletionEnabled || responsiveCompletionEnabled;
    }
 
    public static CompletionSessionData GetOrCreateSessionData(IAsyncCompletionSession session)
        => session.Properties.GetOrCreateSingletonProperty(RoslynCompletionSessionData, () => new CompletionSessionData(session));
}