// 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.Generic;
using System.Globalization;
using System.Linq;
using Microsoft.CodeAnalysis.Collections;
using Microsoft.CodeAnalysis.Completion;
using Microsoft.CodeAnalysis.Shared.TestHooks;
using Roslyn.Utilities;

namespace Microsoft.CodeAnalysis.ExternalAccess.VSTypeScript.Api;

internal abstract class VSTypeScriptCompletionServiceWithProviders : CompletionService
{
    // Pass in NullProvider since it's only used for testing project reference based CompletionProvider,
    // which TypeScript does not need.
    internal VSTypeScriptCompletionServiceWithProviders(Workspace workspace)
        : base(workspace.Services.SolutionServices, AsynchronousOperationListenerProvider.NullProvider)
    {
    }

    internal sealed override CompletionRules GetRules(CompletionOptions options)
        => GetRulesImpl();

    internal abstract CompletionRules GetRulesImpl();

    internal sealed override void FilterItems(
       Document document,
       IReadOnlyList<MatchResult> matchResults,
       string filterText,
       IList<MatchResult> builder)
        => FilterItemsImpl(document, matchResults, filterText, builder);

    internal virtual void FilterItemsImpl(
        Document document,
        IReadOnlyList<MatchResult> matchResults,
        string filterText,
        IList<MatchResult> builder)
    {
#pragma warning disable RS0030 // Do not used banned APIs
        var filteredItems = FilterItems(document, matchResults.SelectAsArray(item => item.CompletionItem), filterText);
#pragma warning restore RS0030 // Do not used banned APIs

        using var helper = new PatternMatchHelper(filterText);
        builder.AddRange(filteredItems.Select(item => helper.GetMatchResult(item, includeMatchSpans: false, CultureInfo.CurrentCulture)));
    }
}