' 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 Microsoft.CodeAnalysis.Text
Imports Microsoft.CodeAnalysis.Utilities
Imports Microsoft.CodeAnalysis.VisualBasic.CodeGeneration
Imports Microsoft.CodeAnalysis.VisualBasic.Syntax

Namespace Microsoft.CodeAnalysis.VisualBasic.Wrapping.SeparatedSyntaxList
    Partial Friend Class VisualBasicParameterWrapper
        Inherits AbstractVisualBasicSeparatedSyntaxListWrapper(Of ParameterListSyntax, ParameterSyntax)

        Protected Overrides ReadOnly Property Align_wrapped_items As String = FeaturesResources.Align_wrapped_parameters
        Protected Overrides ReadOnly Property Indent_all_items As String = FeaturesResources.Indent_all_parameters
        Protected Overrides ReadOnly Property Indent_wrapped_items As String = FeaturesResources.Indent_wrapped_parameters
        Protected Overrides ReadOnly Property Unwrap_all_items As String = FeaturesResources.Unwrap_all_parameters
        Protected Overrides ReadOnly Property Unwrap_and_indent_all_items As String = FeaturesResources.Unwrap_and_indent_all_parameters
        Protected Overrides ReadOnly Property Unwrap_list As String = FeaturesResources.Unwrap_parameter_list
        Protected Overrides ReadOnly Property Wrap_every_item As String = FeaturesResources.Wrap_every_parameter
        Protected Overrides ReadOnly Property Wrap_long_list As String = FeaturesResources.Wrap_long_parameter_list

        Public Overrides ReadOnly Property Supports_UnwrapGroup_WrapFirst_IndentRest As Boolean = True
        Public Overrides ReadOnly Property Supports_WrapEveryGroup_UnwrapFirst As Boolean = True
        Public Overrides ReadOnly Property Supports_WrapLongGroup_UnwrapFirst As Boolean = True

        Protected Overrides ReadOnly Property ShouldMoveCloseBraceToNewLine As Boolean = False

        Protected Overrides Function FirstToken(listSyntax As ParameterListSyntax) As SyntaxToken
            Return listSyntax.OpenParenToken
        End Function

        Protected Overrides Function LastToken(listSyntax As ParameterListSyntax) As SyntaxToken
            Return listSyntax.CloseParenToken
        End Function

        Protected Overrides Function GetListItems(listSyntax As ParameterListSyntax) As SeparatedSyntaxList(Of ParameterSyntax)
            Return listSyntax.Parameters
        End Function

        Protected Overrides Function TryGetApplicableList(node As SyntaxNode) As ParameterListSyntax
            Return node.GetParameterList()
        End Function

        Protected Overrides Function PositionIsApplicable(
                root As SyntaxNode, position As Integer, declaration As SyntaxNode,
                containsSyntaxError As Boolean, listSyntax As ParameterListSyntax) As Boolean

            Dim generator = VisualBasicSyntaxGenerator.Instance
            Dim attributes = generator.GetAttributes(declaration)

            ' We want to offer this feature in the header of the member.  For now, we consider
            ' the header to be the part after the attributes, to the end of the parameter list.
            Dim firstToken = If(attributes?.Count > 0,
                attributes.Last().GetLastToken().GetNextToken(),
                declaration.GetFirstToken())

            Dim lastToken = listSyntax.GetLastToken()

            Dim headerSpan = TextSpan.FromBounds(firstToken.SpanStart, lastToken.Span.End)
            If Not headerSpan.IntersectsWith(position) Then
                Return False
            End If

            If containsSyntaxError AndAlso ContainsOverlappingSyntaxError(declaration, headerSpan) Then
                Return False
            End If

            Return True
        End Function
    End Class
End Namespace