﻿// 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.Diagnostics.CodeAnalysis;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.Editor.Wpf;
using Microsoft.VisualStudio.Shell.TableControl;

namespace Microsoft.VisualStudio.LanguageServices.FindUsages
{
    internal partial class StreamingFindUsagesPresenter
    {
        /// <summary>
        /// Represents a single entry (i.e. row) in the ungrouped FAR table.
        /// </summary>
        private abstract class Entry
        {
            public readonly RoslynDefinitionBucket DefinitionBucket;

            protected Entry(RoslynDefinitionBucket definitionBucket)
                => DefinitionBucket = definitionBucket;

            public bool TryGetValue(string keyName, out object? content)
            {
                content = GetValue(keyName);
                return content != null;
            }

            private object? GetValue(string keyName)
            {
                switch (keyName)
                {
                    case StandardTableKeyNames2.Definition:
                        return DefinitionBucket;

                    case StandardTableKeyNames2.DefinitionIcon:
                        return DefinitionBucket?.DefinitionItem.Tags.GetFirstGlyph().GetImageMoniker();
                }

                return GetValueWorker(keyName);
            }

            protected abstract object? GetValueWorker(string keyName);

            public virtual bool TryCreateColumnContent(string columnName, [NotNullWhen(true)] out FrameworkElement? content)
            {
                content = null;
                return false;
            }
        }
    }
}
