// 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.Net;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Server.IIS.FunctionalTests.Utilities;
using Microsoft.AspNetCore.Server.IntegrationTesting.IIS;
using Microsoft.AspNetCore.Testing.xunit;
using Xunit;

namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
{
    [Collection(PublishedSitesCollection.Name)]
    public class StartupExceptionTests : LogFileTestBase
    {
        private readonly PublishedSitesFixture _fixture;

        public StartupExceptionTests(PublishedSitesFixture fixture)
        {
            _fixture = fixture;
        }

        [ConditionalTheory]
        [InlineData("CheckLargeStdErrWrites")]
        [InlineData("CheckLargeStdOutWrites")]
        [InlineData("CheckOversizedStdErrWrites")]
        [InlineData("CheckOversizedStdOutWrites")]
        public async Task CheckStdoutWithLargeWrites_TestSink(string mode)
        {
            var deploymentParameters = _fixture.GetBaseDeploymentParameters(_fixture.InProcessTestSite, publish: true);
            deploymentParameters.TransformArguments((a, _) => $"{a} {mode}");
            var deploymentResult = await DeployAsync(deploymentParameters);

            await AssertFailsToStart(deploymentResult);
            var expectedString = new string('a', 30000);
            Assert.Contains(TestSink.Writes, context => context.Message.Contains(expectedString));
            EventLogHelpers.VerifyEventLogEvent(deploymentResult, EventLogHelpers.InProcessThreadExitStdOut(deploymentResult, "12", expectedString));
        }

        [ConditionalTheory]
        [InlineData("CheckLargeStdErrWrites")]
        [InlineData("CheckLargeStdOutWrites")]
        [InlineData("CheckOversizedStdErrWrites")]
        [InlineData("CheckOversizedStdOutWrites")]
        public async Task CheckStdoutWithLargeWrites_LogFile(string mode)
        {
            var deploymentParameters = _fixture.GetBaseDeploymentParameters(_fixture.InProcessTestSite, publish: true);
            deploymentParameters.TransformArguments((a, _) => $"{a} {mode}");
            deploymentParameters.EnableLogging(_logFolderPath);

            var deploymentResult = await DeployAsync(deploymentParameters);

            await AssertFailsToStart(deploymentResult);

            var contents = GetLogFileContent(deploymentResult);
            var expectedString = new string('a', 30000);

            Assert.Contains(expectedString, contents);
            EventLogHelpers.VerifyEventLogEvent(deploymentResult, EventLogHelpers.InProcessThreadExitStdOut(deploymentResult, "12", expectedString));
        }

        [ConditionalFact]
        public async Task CheckValidConsoleFunctions()
        {
            var deploymentParameters = _fixture.GetBaseDeploymentParameters(_fixture.InProcessTestSite, publish: true);
            deploymentParameters.TransformArguments((a, _) => $"{a} CheckConsoleFunctions");

            var deploymentResult = await DeployAsync(deploymentParameters);

            await AssertFailsToStart(deploymentResult);

            Assert.Contains(TestSink.Writes, context => context.Message.Contains("Is Console redirection: True"));
        }

        private async Task AssertFailsToStart(IISDeploymentResult deploymentResult)
        {
            var response = await deploymentResult.HttpClient.GetAsync("/HelloWorld");

            Assert.Equal(HttpStatusCode.InternalServerError, response.StatusCode);

            StopServer();
        }

        [ConditionalFact]
        public async Task Gets500_30_ErrorPage()
        {
            var deploymentParameters = _fixture.GetBaseDeploymentParameters(_fixture.InProcessTestSite, publish: true);
            deploymentParameters.TransformArguments((a, _) => $"{a} EarlyReturn");

            var deploymentResult = await DeployAsync(deploymentParameters);

            var response = await deploymentResult.HttpClient.GetAsync("/HelloWorld");
            Assert.False(response.IsSuccessStatusCode);
            Assert.Equal(HttpStatusCode.InternalServerError, response.StatusCode);

            var responseText = await response.Content.ReadAsStringAsync();
            Assert.Contains("500.30 - ANCM In-Process Start Failure", responseText);
        }
    }
}