using System.Diagnostics;
using System.IO;
using System.Threading.Tasks;
using UnifiedFarmLauncher.Models;

namespace UnifiedFarmLauncher.Services
{
    public class AttachService
    {
        private readonly SshService _sshService;
        private readonly WorkerControllerService _controllerService;

        public AttachService(SshService sshService, WorkerControllerService controllerService)
        {
            _sshService = sshService;
            _controllerService = controllerService;
        }

        public async Task AttachToWorkerAsync(WorkerConfig worker, string workerType, bool commandOnly = false, string? command = null)
        {
            await _controllerService.DeployAttachHelperAsync(worker);

            var remoteBasePath = await _sshService.GetWorkerBasePathAsync(worker);
            var remoteHelper = Path.Combine(remoteBasePath, "attach-helper.ps1");

            var paramsBlock = $"-WorkerName \"{worker.Name}\" -WorkerType \"{workerType}\"";
            if (commandOnly)
            {
                paramsBlock += " -CommandOnly";
            }
            if (!string.IsNullOrEmpty(command))
            {
                paramsBlock += $" -Command \"{command}\"";
            }

            // Use Windows path format (backslashes) and ensure it's properly quoted
            // Add -NoExit to keep window open and ensure output is visible
            // Use -Command with & to properly invoke the script and avoid pipeline input issues
            var escapedHelper = remoteHelper.Replace("'", "''");
            var remoteCmd = $"powershell.exe -NoLogo -NoProfile -NoExit -ExecutionPolicy Bypass -Command \"& '{escapedHelper}' {paramsBlock}\"";

            _sshService.StartInteractiveSsh(worker, remoteCmd);
        }
    }
}