// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#nullable disable

using Microsoft.AspNetCore.Razor.Language.Syntax.InternalSyntax;
using Xunit;

namespace Microsoft.AspNetCore.Razor.Language.Legacy;

public class CSharpTokenizerCommentTest : CSharpTokenizerTestBase
{
    private new SyntaxToken IgnoreRemaining => (SyntaxToken)base.IgnoreRemaining;

    [Fact]
    public void Next_Ignores_Star_At_EOF_In_RazorComment()
    {
        TestTokenizer(
            "@* Foo * Bar * Baz *",
            SyntaxFactory.Token(SyntaxKind.RazorCommentTransition, "@"),
            SyntaxFactory.Token(SyntaxKind.RazorCommentStar, "*"),
            SyntaxFactory.Token(SyntaxKind.RazorCommentLiteral, " Foo * Bar * Baz *"));
    }

    [Fact]
    public void Next_Ignores_Star_Without_Trailing_At()
    {
        TestTokenizer(
            "@* Foo * Bar * Baz *@",
            SyntaxFactory.Token(SyntaxKind.RazorCommentTransition, "@"),
            SyntaxFactory.Token(SyntaxKind.RazorCommentStar, "*"),
            SyntaxFactory.Token(SyntaxKind.RazorCommentLiteral, " Foo * Bar * Baz "),
            SyntaxFactory.Token(SyntaxKind.RazorCommentStar, "*"),
            SyntaxFactory.Token(SyntaxKind.RazorCommentTransition, "@"));
    }

    [Fact]
    public void Next_Returns_RazorComment_Token_For_Entire_Razor_Comment()
    {
        TestTokenizer(
            "@* Foo Bar Baz *@",
            SyntaxFactory.Token(SyntaxKind.RazorCommentTransition, "@"),
            SyntaxFactory.Token(SyntaxKind.RazorCommentStar, "*"),
            SyntaxFactory.Token(SyntaxKind.RazorCommentLiteral, " Foo Bar Baz "),
            SyntaxFactory.Token(SyntaxKind.RazorCommentStar, "*"),
            SyntaxFactory.Token(SyntaxKind.RazorCommentTransition, "@"));
    }

    [Fact]
    public void Next_Returns_Comment_Token_For_Entire_Single_Line_Comment()
    {
        TestTokenizer("// Foo Bar Baz", SyntaxFactory.Token(SyntaxKind.CSharpComment, "// Foo Bar Baz"));
    }

    [Fact]
    public void Single_Line_Comment_Is_Terminated_By_Newline()
    {
        TestTokenizer("// Foo Bar Baz\na", SyntaxFactory.Token(SyntaxKind.CSharpComment, "// Foo Bar Baz"), IgnoreRemaining);
    }

    [Fact]
    public void Multi_Line_Comment_In_Single_Line_Comment_Has_No_Effect()
    {
        TestTokenizer("// Foo/*Bar*/ Baz\na", SyntaxFactory.Token(SyntaxKind.CSharpComment, "// Foo/*Bar*/ Baz"), IgnoreRemaining);
    }

    [Fact]
    public void Next_Returns_Comment_Token_For_Entire_Multi_Line_Comment()
    {
        TestTokenizer("/* Foo\nBar\nBaz */", SyntaxFactory.Token(SyntaxKind.CSharpComment, "/* Foo\nBar\nBaz */"));
    }

    [Fact]
    public void Multi_Line_Comment_Is_Terminated_By_End_Sequence()
    {
        TestTokenizer("/* Foo\nBar\nBaz */a", SyntaxFactory.Token(SyntaxKind.CSharpComment, "/* Foo\nBar\nBaz */"), IgnoreRemaining);
    }

    [Fact]
    public void Unterminated_Multi_Line_Comment_Captures_To_EOF()
    {
        TestTokenizer("/* Foo\nBar\nBaz", SyntaxFactory.Token(SyntaxKind.CSharpComment, "/* Foo\nBar\nBaz"), IgnoreRemaining);
    }

    [Fact]
    public void Nested_Multi_Line_Comments_Terminated_At_First_End_Sequence()
    {
        TestTokenizer("/* Foo/*\nBar\nBaz*/ */", SyntaxFactory.Token(SyntaxKind.CSharpComment, "/* Foo/*\nBar\nBaz*/"), IgnoreRemaining);
    }

    [Fact]
    public void Nested_Multi_Line_Comments_Terminated_At_Full_End_Sequence()
    {
        TestTokenizer("/* Foo\nBar\nBaz* */", SyntaxFactory.Token(SyntaxKind.CSharpComment, "/* Foo\nBar\nBaz* */"), IgnoreRemaining);
    }
}
