// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#nullable disable

using System.CommandLine;
using Microsoft.DotNet.Cli.Utils;
using Microsoft.VisualStudio.SolutionPersistence.Model;
using Microsoft.VisualStudio.SolutionPersistence.Serializer;

namespace Microsoft.DotNet.Cli.Commands.Solution.Migrate;

internal sealed class SolutionMigrateCommand : CommandBase<SolutionMigrateCommandDefinition>
{
    private readonly string _slnFileOrDirectory;
    private readonly IReporter _reporter;

    public SolutionMigrateCommand(ParseResult parseResult, IReporter reporter = null)
        : base(parseResult)
    {
        _slnFileOrDirectory = parseResult.GetValue(Definition.Parent.SlnArgument);
        _reporter = reporter ?? Reporter.Output;
    }


    public override int Execute()
    {
        string slnFileFullPath = SlnFileFactory.GetSolutionFileFullPath(_slnFileOrDirectory);
        if (slnFileFullPath.HasExtension(".slnx"))
        {
            throw new GracefulException(CliCommandStrings.CannotMigrateSlnx);
        }
        string slnxFileFullPath = Path.ChangeExtension(slnFileFullPath, "slnx");
        try
        {
            ConvertToSlnxAsync(slnFileFullPath, slnxFileFullPath, CancellationToken.None).Wait();
            return 0;
        }
        catch (Exception ex)
        {
            throw new GracefulException(ex.Message, ex);
        }
    }

    private async Task ConvertToSlnxAsync(string filePath, string slnxFilePath, CancellationToken cancellationToken)
    {
        SolutionModel solution = SlnFileFactory.CreateFromFileOrDirectory(filePath);
        await SolutionSerializers.SlnXml.SaveAsync(slnxFilePath, solution, cancellationToken);
        _reporter.WriteLine(CliCommandStrings.SlnxGenerated, slnxFilePath);
    }
}