// 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.Linq;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Formatting;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis.Simplification;

namespace Microsoft.CodeAnalysis.CSharp.Extensions
{
    internal static partial class CastExpressionSyntaxExtensions
    {
        public static ExpressionSyntax Uncast(this CastExpressionSyntax node)
        {
            var leadingTrivia = node.OpenParenToken.LeadingTrivia
                .Concat(node.OpenParenToken.TrailingTrivia)
                .Concat(node.Type.GetLeadingTrivia())
                .Concat(node.Type.GetTrailingTrivia())
                .Concat(node.CloseParenToken.LeadingTrivia)
                .Concat(node.CloseParenToken.TrailingTrivia)
                .Concat(node.Expression.GetLeadingTrivia())
                .Where(t => !t.IsElastic());

            var trailingTrivia = node.GetTrailingTrivia().Where(t => !t.IsElastic());

            var resultNode = node.Expression
                .WithLeadingTrivia(leadingTrivia)
                .WithTrailingTrivia(trailingTrivia)
                .WithAdditionalAnnotations(Simplifier.Annotation);

            resultNode = SimplificationHelpers.CopyAnnotations(from: node, to: resultNode);

            return resultNode;
        }
    }
}
