// 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.Collections.Immutable;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Completion;
using Microsoft.CodeAnalysis.LanguageService;

namespace Microsoft.CodeAnalysis.ExternalAccess.OmniSharp.Completion;

internal static class OmniSharpCompletionService
{
    public static async ValueTask<bool> ShouldTriggerCompletionAsync(
        this CompletionService completionService,
        Document document,
        int caretPosition,
        CompletionTrigger trigger,
        ImmutableHashSet<string>? roles,
        OmniSharpCompletionOptions options,
        CancellationToken cancellationToken)
    {
        var text = await document.GetValueTextAsync(cancellationToken).ConfigureAwait(false);
        return completionService.ShouldTriggerCompletion(document.Project, document.Project.Services, text, caretPosition, trigger, options.ToCompletionOptions(), document.Project.Solution.Options, roles);
    }

    public static Task<CompletionList> GetCompletionsAsync(
       this CompletionService completionService,
       Document document,
       int caretPosition,
       CompletionTrigger trigger,
       ImmutableHashSet<string>? roles,
       OmniSharpCompletionOptions options,
       CancellationToken cancellationToken)
    {
        return completionService.GetCompletionsAsync(document, caretPosition, options.ToCompletionOptions(), document.Project.Solution.Options, trigger, roles, cancellationToken);
    }

    public static Task<CompletionDescription?> GetDescriptionAsync(
       this CompletionService completionService,
       Document document,
       CompletionItem item,
       OmniSharpCompletionOptions options,
       CancellationToken cancellationToken)
    {
        return completionService.GetDescriptionAsync(document, item, options.ToCompletionOptions(), SymbolDescriptionOptions.Default, cancellationToken);
    }

    public static string? GetProviderName(this CompletionItem completionItem) => completionItem.ProviderName;
}