// 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 Microsoft.CodeAnalysis.Formatting.Rules;

namespace Microsoft.CodeAnalysis.Formatting;

/// <summary>
/// it holds onto space and wrapping operation need to run between two tokens.
/// </summary>
internal readonly struct TokenPairWithOperations
{
    public TokenStream TokenStream { get; }
    public AdjustSpacesOperation? SpaceOperation { get; }
    public AdjustNewLinesOperation? LineOperation { get; }

    public int PairIndex { get; }

    public TokenPairWithOperations(
        TokenStream tokenStream,
        int tokenPairIndex,
        AdjustSpacesOperation? spaceOperations,
        AdjustNewLinesOperation? lineOperations)
        : this()
    {
        Contract.ThrowIfNull(tokenStream);

        Contract.ThrowIfFalse(0 <= tokenPairIndex && tokenPairIndex < tokenStream.TokenCount - 1);

        this.TokenStream = tokenStream;
        this.PairIndex = tokenPairIndex;

        SpaceOperation = spaceOperations;
        LineOperation = lineOperations;
    }

    public SyntaxToken Token1
    {
        get
        {
            return this.TokenStream.GetToken(this.PairIndex);
        }
    }

    public SyntaxToken Token2
    {
        get
        {
            return this.TokenStream.GetToken(this.PairIndex + 1);
        }
    }
}