// Copyright (c) .NET Foundation and contributors. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.

using System;
using System.IO;
using Microsoft.DotNet.Tools.Test.Utilities;
using Xunit;

namespace Microsoft.DotNet.Tests.EndToEnd
{
    public class GivenDotNetLinuxInstallers
    {
        [Fact]
        public void ItHasExpectedDependencies()
        {
            var installerFile = Environment.GetEnvironmentVariable("SDK_INSTALLER_FILE");
            if (string.IsNullOrEmpty(installerFile))
            {
                return;
            }

            var ext = Path.GetExtension(installerFile);
            switch (ext)
            {
                case ".deb":
                    DebianPackageHasDependencyOnAspNetCoreStoreAndDotnetRuntime(installerFile);
                    return;
                case ".rpm":
                    RpmPackageHasDependencyOnAspNetCoreStoreAndDotnetRuntime(installerFile);
                    return;
            }
        }

        private void DebianPackageHasDependencyOnAspNetCoreStoreAndDotnetRuntime(string installerFile)
        {
            // Example output:

            // $ dpkg --info dotnet-sdk-2.1.105-ubuntu-x64.deb

            // new debian package, version 2.0.
            // size 75660448 bytes: control archive=29107 bytes.
            //     717 bytes,    11 lines      control              
            // 123707 bytes,  1004 lines      md5sums              
            //     1710 bytes,    28 lines   *  postinst             #!/usr/bin/env
            // Package: dotnet-sdk-2.1.104
            // Version: 2.1.104-1
            // Architecture: amd64
            // Maintainer: Microsoft <dotnetcore@microsoft.com>
            // Installed-Size: 201119
            // Depends: dotnet-runtime-2.0.6, aspnetcore-store-2.0.6
            // Section: devel
            // Priority: standard
            // Homepage: https://dotnet.github.io/core
            // Description: Microsoft .NET Core SDK - 2.1.104

            new TestCommand("dpkg")
                .ExecuteWithCapturedOutput($"--info {installerFile}")
                .Should().Pass()
                    .And.HaveStdOutMatching(@"Depends:.*\s?dotnet-runtime-\d+(\.\d+){2}")
                    .And.HaveStdOutMatching(@"Depends:.*\s?aspnetcore-store-\d+(\.\d+){2}");
        }

        private void RpmPackageHasDependencyOnAspNetCoreStoreAndDotnetRuntime(string installerFile)
        {
            // Example output:

            // $ rpm -qpR dotnet-sdk-2.1.105-rhel-x64.rpm

            // dotnet-runtime-2.0.7 >= 2.0.7
            // aspnetcore-store-2.0.7 >= 2.0.7
            // /bin/sh
            // /bin/sh
            // rpmlib(PayloadFilesHavePrefix) <= 4.0-1
            // rpmlib(CompressedFileNames) <= 3.0.4-1

            new TestCommand("rpm")
                .ExecuteWithCapturedOutput($"-qpR {installerFile}")
                .Should().Pass()
                    .And.HaveStdOutMatching(@"dotnet-runtime-\d+(\.\d+){2} >= \d+(\.\d+){2}")
                    .And.HaveStdOutMatching(@"aspnetcore-store-\d+(\.\d+){2} >= \d+(\.\d+){2}");
        }
    }
}
