// 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.Threading.Tasks;
using Microsoft.CodeAnalysis.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.Recommendations;
 
[Trait(Traits.Feature, Traits.Features.KeywordRecommending)]
public sealed class CaseKeywordRecommenderTests : KeywordRecommenderTests
{
    [Fact]
    public async Task TestNotAtRoot_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
@"$$");
    }
 
    [Fact]
    public async Task TestNotAfterClass_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            class C { }
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterGlobalStatement_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            System.Console.WriteLine();
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotAfterGlobalVariableDeclaration_Interactive()
    {
        await VerifyAbsenceAsync(SourceCodeKind.Script,
            """
            int i = 0;
            $$
            """);
    }
 
    [Fact]
    public async Task TestNotInUsingAlias()
    {
        await VerifyAbsenceAsync(
@"using Goo = $$");
    }
 
    [Fact]
    public async Task TestNotInGlobalUsingAlias()
    {
        await VerifyAbsenceAsync(
@"global using Goo = $$");
    }
 
    [Fact]
    public async Task TestNotInEmptyStatement()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"$$"));
    }
 
    [Fact]
    public async Task TestNotAfterExpr()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"var q = goo $$"));
    }
 
    [Fact]
    public async Task TestNotAfterDottedName()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"var q = goo.Current $$"));
    }
 
    [Fact]
    public async Task TestAfterSwitch()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterCase()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                case 0:
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterDefault()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                default:
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterPatternCase()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                case String s:
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterOneStatement()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                default:
                  Console.WriteLine();
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterOneStatementPatternCase()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                case String s:
                  Console.WriteLine();
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterTwoStatements()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                default:
                  Console.WriteLine();
                  Console.WriteLine();
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterBlock()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                default: {
                }
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterBlockPatternCase()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                case String s: {
                }
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterIfElse()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                default:
                  if (goo) {
                  } else {
                  }
                $$
            """));
    }
 
    [Fact]
    public async Task TestNotAfterIncompleteStatement()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
            """
            switch (expr) {
                default:
                   Console.WriteLine(
                $$
            """));
    }
 
    [Fact]
    public async Task TestNotInsideBlock()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
            """
            switch (expr) {
                default: {
                  $$
            """));
    }
 
    [Fact]
    public async Task TestAfterIf()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                default:
                  if (goo)
                    Console.WriteLine();
                $$
            """));
    }
 
    [Fact]
    public async Task TestNotAfterIf()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
            """
            switch (expr) {
                default:
                  if (goo)
                    $$
            """));
    }
 
    [Fact]
    public async Task TestAfterWhile()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                default:
                  while (true) {
                  }
                $$
            """));
    }
 
    [Fact]
    public async Task TestAfterGotoInSwitch()
    {
        await VerifyKeywordAsync(AddInsideMethod(
            """
            switch (expr) {
                default:
                  goto $$
            """));
    }
 
    [Fact]
    public async Task TestNotAfterGotoOutsideSwitch()
    {
        await VerifyAbsenceAsync(AddInsideMethod(
@"goto $$"));
    }
}