// 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 System.Linq;
using Microsoft.DotNet.Cli;
using Microsoft.DotNet.Cli.CommandLine;
using Microsoft.DotNet.Cli.Sln.Internal;
using Microsoft.DotNet.Cli.Utils;
using Microsoft.DotNet.Tools.Common;

namespace Microsoft.DotNet.Tools.Sln.Add
{
    internal class AddProjectToSolutionCommand : CommandBase
    {
        private readonly AppliedOption _appliedCommand;
        private readonly string _fileOrDirectory;

        public AddProjectToSolutionCommand(
            AppliedOption appliedCommand, 
            string fileOrDirectory,
            ParseResult parseResult) : base(parseResult)
        {
            if (appliedCommand == null)
            {
                throw new ArgumentNullException(nameof(appliedCommand));
            }
            _appliedCommand = appliedCommand;

            _fileOrDirectory = fileOrDirectory;
        }

        public override int Execute()
        {
            SlnFile slnFile = SlnFileFactory.CreateFromFileOrDirectory(_fileOrDirectory);

            if (_appliedCommand.Arguments.Count == 0)
            {
                throw new GracefulException(CommonLocalizableStrings.SpecifyAtLeastOneProjectToAdd);
            }

            PathUtility.EnsureAllPathsExist(_appliedCommand.Arguments, CommonLocalizableStrings.ProjectDoesNotExist);

            var fullProjectPaths = _appliedCommand.Arguments
                                                  .Select(Path.GetFullPath)
                                                  .ToList();

            var preAddProjectCount = slnFile.Projects.Count;

            foreach (var fullProjectPath in fullProjectPaths)
            {
                slnFile.AddProject(fullProjectPath);
            }

            if (slnFile.Projects.Count > preAddProjectCount)
            {
                slnFile.Write();
            }

            return 0;
        }
    }
}