// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Razor.PooledObjects;
 
namespace Microsoft.CodeAnalysis.Razor.Tooltip;
 
internal static class Extensions
{
    internal static async Task<string?> GetProjectAvailabilityTextAsync(
        this IComponentAvailabilityService componentAvailabilityService,
        string documentFilePath,
        string tagHelperTypeName,
        CancellationToken cancellationToken)
    {
        var projects = await componentAvailabilityService
            .GetComponentAvailabilityAsync(documentFilePath, tagHelperTypeName, cancellationToken)
            .ConfigureAwait(false);
 
        if (projects.IsEmpty)
        {
            return null;
        }
 
        using var _ = StringBuilderPool.GetPooledObject(out var builder);
 
        foreach (var (project, isAvailable) in projects.OrderBy(p => p.Project.DisplayName))
        {
            if (isAvailable)
            {
                continue;
            }
 
            if (builder.Length == 0)
            {
                builder.AppendLine();
                builder.Append($"⚠️ {SR.Not_Available_In}:");
            }
 
            builder.AppendLine();
            builder.Append("    ");
            builder.Append(project.DisplayName);
        }
 
        if (builder.Length == 0)
        {
            return null;
        }
 
        return builder.ToString();
    }
}