' 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.
 
Imports System.Collections.Immutable
Imports System.Composition
Imports System.Diagnostics.CodeAnalysis
Imports Microsoft.CodeAnalysis.CodeFixes
Imports Microsoft.CodeAnalysis.PooledObjects
Imports Microsoft.CodeAnalysis.UseObjectInitializer
Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
 
Namespace Microsoft.CodeAnalysis.VisualBasic.UseObjectInitializer
    <ExportCodeFixProvider(LanguageNames.VisualBasic, Name:=PredefinedCodeFixProviderNames.UseObjectInitializer), [Shared]>
    Friend NotInheritable Class VisualBasicUseObjectInitializerCodeFixProvider
        Inherits AbstractUseObjectInitializerCodeFixProvider(Of
            SyntaxKind,
            ExpressionSyntax,
            StatementSyntax,
            ObjectCreationExpressionSyntax,
            MemberAccessExpressionSyntax,
            AssignmentStatementSyntax,
            LocalDeclarationStatementSyntax,
            VariableDeclaratorSyntax,
            VisualBasicUseNamedMemberInitializerAnalyzer)
 
        <ImportingConstructor>
        <SuppressMessage("RoslynDiagnosticsReliability", "RS0033:Importing constructor should be [Obsolete]", Justification:="Used in test code: https://github.com/dotnet/roslyn/issues/42814")>
        Public Sub New()
        End Sub
 
        Protected Overrides Function GetAnalyzer() As VisualBasicUseNamedMemberInitializerAnalyzer
            Return VisualBasicUseNamedMemberInitializerAnalyzer.Allocate()
        End Function
 
        Protected Overrides Function GetNewStatement(
                statement As StatementSyntax, objectCreation As ObjectCreationExpressionSyntax,
                matches As ImmutableArray(Of Match(Of ExpressionSyntax, StatementSyntax, MemberAccessExpressionSyntax, AssignmentStatementSyntax))) As StatementSyntax
            Dim newStatement = statement.ReplaceNode(
                objectCreation,
                GetNewObjectCreation(objectCreation, matches))
 
            Dim totalTrivia = ArrayBuilder(Of SyntaxTrivia).GetInstance()
            totalTrivia.AddRange(statement.GetLeadingTrivia())
            totalTrivia.Add(SyntaxFactory.ElasticMarker)
 
            For Each match In matches
                For Each trivia In match.Statement.GetLeadingTrivia()
                    If trivia.Kind = SyntaxKind.CommentTrivia Then
                        totalTrivia.Add(trivia)
                        totalTrivia.Add(SyntaxFactory.ElasticMarker)
                    End If
                Next
            Next
 
            Return newStatement.WithLeadingTrivia(totalTrivia)
        End Function
 
        Private Shared Function GetNewObjectCreation(
                objectCreation As ObjectCreationExpressionSyntax,
                matches As ImmutableArray(Of Match(Of ExpressionSyntax, StatementSyntax, MemberAccessExpressionSyntax, AssignmentStatementSyntax))) As ObjectCreationExpressionSyntax
 
            Return UseInitializerHelpers.GetNewObjectCreation(
                objectCreation,
                SyntaxFactory.ObjectMemberInitializer(
                    CreateFieldInitializers(objectCreation, matches)))
        End Function
 
        Private Shared Function CreateFieldInitializers(
                objectCreation As ObjectCreationExpressionSyntax,
                matches As ImmutableArray(Of Match(Of ExpressionSyntax, StatementSyntax, MemberAccessExpressionSyntax, AssignmentStatementSyntax))) As SeparatedSyntaxList(Of FieldInitializerSyntax)
            Dim nodesAndTokens = ArrayBuilder(Of SyntaxNodeOrToken).GetInstance()
 
            AddExistingItems(objectCreation, nodesAndTokens)
 
            For i = 0 To matches.Length - 1
                Dim match = matches(i)
 
                Dim rightValue = match.Initializer
                If i < matches.Length - 1 Then
                    rightValue = rightValue.WithoutTrailingTrivia()
                End If
 
                Dim initializer = SyntaxFactory.NamedFieldInitializer(
                    keyKeyword:=Nothing,
                    dotToken:=match.MemberAccessExpression.OperatorToken,
                    name:=SyntaxFactory.IdentifierName(match.MemberName),
                    equalsToken:=match.Statement.OperatorToken,
                    expression:=rightValue).WithPrependedLeadingTrivia(SyntaxFactory.ElasticMarker)
 
                nodesAndTokens.Add(initializer)
                If i < matches.Length - 1 Then
                    Dim comma = SyntaxFactory.Token(SyntaxKind.CommaToken).
                                              WithTrailingTrivia(match.Initializer.GetTrailingTrivia())
                    nodesAndTokens.Add(comma)
                End If
            Next
 
            Dim result = SyntaxFactory.SeparatedList(Of FieldInitializerSyntax)(nodesAndTokens)
            nodesAndTokens.Free()
            Return result
        End Function
    End Class
End Namespace