using System;
using System.Configuration;
using System.Linq;
using LeafWeb.Core.DAL;
using LeafWeb.Core.Entities;
using LeafWeb.Core.Remote;

namespace LeafWeb.Web.Services
{
	public class JobService : IDisposable
	{
		protected readonly DataService DataService = new DataService();

		protected IPiscalClient GetPiscalClient()
		{
			return new PiscalSshClient(ConfigurationManager.ConnectionStrings["PiscalServer"].ConnectionString);
		}

		public void ProcessNextLeafInput()
		{
			var leafInputFile = DataService.GetNextUnprocessedLeafInputFile();
			if (leafInputFile == null) // no inputs, quit
				return;

			var inputFile = new PiscalLeafInputFile(leafInputFile);

			var piscalSshClient = GetPiscalClient();
			piscalSshClient.SubmitLeafInputFile(inputFile);

			DataService.SetLeafInputFileStatus(leafInputFile, LeafInputStatusType.ProcessStarted);
		}

		public void UpdateLeafInputStatus()
		{
			var leafInputFiles =
				DataService
				.GetLeafInputFiles(LeafInputStatusType.ProcessStarted)
				.Select(f => new PiscalLeafInputFile(f));

			var piscalClient = GetPiscalClient();
			foreach (var file in leafInputFiles)
			{
				var status = piscalClient.GetLeafInputStatus(file);
				switch (status)
				{
					case PiscalStatus.Success:
						// retrieve LeafOutput
						var outputFile = piscalClient.RetrieveLeafOutput(file);
						break;
					case PiscalStatus.Error:
						// record error
						break;
					case PiscalStatus.Running:
						// do nothing
						break;
				}
			}
		}

		public void Dispose()
		{
			DataService.Dispose();
		}
	}
}