// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System;
using System.Collections.Generic;
using Microsoft.AspNetCore.Razor.Language;
 
namespace Microsoft.CodeAnalysis.Razor.Completion;
 
internal sealed class ElementCompletionResult
{
    public IReadOnlyDictionary<string, IEnumerable<TagHelperDescriptor>> Completions { get; }
 
    private ElementCompletionResult(IReadOnlyDictionary<string, IEnumerable<TagHelperDescriptor>> completions)
    {
        Completions = completions;
    }
 
    internal static ElementCompletionResult Create(Dictionary<string, HashSet<TagHelperDescriptor>> completions)
    {
        if (completions is null)
        {
            throw new ArgumentNullException(nameof(completions));
        }
 
        var readonlyCompletions = new Dictionary<string, IEnumerable<TagHelperDescriptor>>(
            capacity: completions.Count,
            comparer: completions.Comparer);
 
        foreach (var (key, value) in completions)
        {
            readonlyCompletions.Add(key, value);
        }
 
        return new ElementCompletionResult(readonlyCompletions);
    }
}