// ReSharper disable ClassNeverInstantiated.Global
// ReSharper disable InvertIf
namespace TeamCity.CSharpInteractive;

internal class CommandsRunner : ICommandsRunner
{
    private readonly ICommandRunner[] _commandRunners;
    private readonly IStatistics _statistics;

    public CommandsRunner(
        ICommandRunner[] commandRunners,
        IStatistics statistics)
    {
        _commandRunners = commandRunners;
        _statistics = statistics;
    }

    public IEnumerable<CommandResult> Run(IEnumerable<ICommand> commands)
    {
        using (_statistics.Start())
        {
            foreach (var command in commands)
            {
                var processed = false;
                foreach (var runner in _commandRunners)
                {
                    var result = runner.TryRun(command);
                    if (result.Success.HasValue)
                    {
                        processed = true;
                        yield return result;
                        break;
                    }
                }

                if (!processed)
                {
                    yield return new CommandResult(command, default);
                }
            }
        }
    }
}