// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using System.IO;
using System.Linq;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Testing;
using Xunit;

namespace Microsoft.AspNetCore.Mvc.Razor.ViewCompilation
{
    public class ApplicationWithParseErrorsTest :
        IClassFixture<ApplicationWithParseErrorsTest.ApplicationWithParseErrorsFixture>
    {
        public ApplicationWithParseErrorsTest(ApplicationWithParseErrorsFixture fixture)
        {
            Fixture = fixture;
        }

        public ApplicationWithParseErrorsFixture Fixture { get; }

        [Fact]
        public void PublishingPrintsParseErrors()
        {
            var indexPath = Path.Combine(Fixture.ApplicationPath, "Views", "Home", "Index.cshtml");
            var viewImportsPath = Path.Combine(Fixture.ApplicationPath, "Views", "Home", "About.cshtml");
            var expectedErrors = new[]
            {
                indexPath + " (0): The code block is missing a closing \"}\" character.  Make sure you have a matching \"}\" character for all the \"{\" characters within this block, and that none of the \"}\" characters are being interpreted as markup.",
                viewImportsPath + " (1): A space or line break was encountered after the \"@\" character.  Only valid identifiers, keywords, comments, \"(\" and \"{\" are valid at the start of a code block and they must occur immediately following \"@\" with no space in between.",

            };

            // Act & Assert
            Assert.Throws<Exception>(() => Fixture.CreateDeployment());

            // Assert
            var output = Fixture.TestSink.Writes.Select(w => w.State.ToString().Trim()).ToList();

            foreach (var error in expectedErrors)
            {
                Assert.Contains(error, output);
            }
        }

        public class ApplicationWithParseErrorsFixture : ApplicationTestFixture
        {
            public ApplicationWithParseErrorsFixture()
                : base("ApplicationWithParseErrors")
            {
            }

            public TestSink TestSink { get; } = new TestSink();

            public override ILogger CreateLogger()
            {
                return new TestLoggerFactory(TestSink, enabled: true).CreateLogger($"{ApplicationName}");
            }
        }
    }
}