// 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 Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.Formatting.Rules
{
    [NonDefaultable]
    internal readonly struct NextGetAdjustSpacesOperation
    {
        private readonly ImmutableArray<AbstractFormattingRule> _formattingRules;
        private readonly int _index;
 
        public NextGetAdjustSpacesOperation(
            ImmutableArray<AbstractFormattingRule> formattingRules,
            int index)
        {
            _formattingRules = formattingRules;
            _index = index;
        }
 
        private NextGetAdjustSpacesOperation NextOperation
            => new(_formattingRules, _index + 1);
 
        public AdjustSpacesOperation? Invoke(in SyntaxToken previousToken, in SyntaxToken currentToken)
        {
            // If we have no remaining handlers to execute, then we'll execute our last handler
            if (_index >= _formattingRules.Length)
            {
                return null;
            }
            else
            {
                // Call the handler at the index, passing a continuation that will come back to here with index + 1
                return _formattingRules[_index].GetAdjustSpacesOperation(in previousToken, in currentToken, NextOperation);
            }
        }
    }
}