using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using HeuristicLab.Services.Optimization.ControllerService.Interfaces;
using HeuristicLab.Optimization;
using HeuristicLab.Algorithms.GeneticAlgorithm;
using HeuristicLab.Problems.TravelingSalesman;
using HeuristicLab;
using System.Reflection;
using HeuristicLab.Services.Optimization.ControllerService.Model;
using HeuristicLab.Core;
using System.Collections;
using HeuristicLab.Clients.Hive;
using System.Threading;
using HeuristicLab.Data;
using System.IO;
using Microsoft.WindowsAzure;
using Microsoft.WindowsAzure.StorageClient;
using HeuristicLab.Services.Optimization.ControllerService.Azure;
using System.Data;

namespace HeuristicLab.Services.Optimization.ControllerService {
  public class MockupScenarioManager : IScenarioManager {
    private static List<Model.Job> jobs;
    private static Dictionary<string, List<Model.Run>> jobResults;
    private static IDataAccessLayer dal = DataAccessLayerProvider.GetLayer();
    private Dictionary<string, IScenarioMapper> mappers = new Dictionary<string, IScenarioMapper>();
    private static object lockable = new object();

    static MockupScenarioManager() {
      jobs = new List<Model.Job>() {
        new Model.Job() { DateCreated = DateTime.Now, Id = "1", Name="Webscheduled TSP", Resource="TESTGROUP", State=JobState.Finished },
        new Model.Job() { DateCreated = DateTime.Now, Id = "2", Name="Webscheduled TSP 2", Resource="TESTGROUP", State=JobState.Calculating }
      };
      jobResults = new Dictionary<string, List<Model.Run>>();
      jobResults["1"] = new List<Model.Run>() {
        new Model.Run() {
          Id = "Webscheduled TSP Run 1",
          Name = "Webscheduled TSP Run 1",
          Results = new List<Parameter>() {
            new Parameter() { 
              Value = new HeuristicLab.Services.Optimization.ControllerService.Model.DecimalValue(){
                Name = "AbsoluteDifferenceBestKnownToBest",
                Value = 0
              },
              Type = ParameterType.Decimal
            },
            new Parameter() { 
              Value = new HeuristicLab.Services.Optimization.ControllerService.Model.DecimalValue(){
                Name = "BestKnownQuality",
                Value = 1600
              },              
              Type = ParameterType.Decimal
            },
            new Parameter() { 
              Value = new HeuristicLab.Services.Optimization.ControllerService.Model.DecimalValue(){
                Name = "BestQuality",
                Value = 1600
              },              
              Type = ParameterType.Decimal
            },
            new Parameter() { 
              Value = new HeuristicLab.Services.Optimization.ControllerService.Model.DecimalValue(){
                Name = "CurrentAverageQuality",
                Value = 1600
              },              
              Type = ParameterType.Decimal
            },
            new Parameter() { 
              Value = new HeuristicLab.Services.Optimization.ControllerService.Model.DecimalValue(){
                Name = "CurrentBestQuality",
                Value = 1600
              },              
              Type = ParameterType.Decimal
            },
            new Parameter() { 
              Value = new HeuristicLab.Services.Optimization.ControllerService.Model.DecimalValue(){
                Name = "CurrentWorstQuality",
                Value = 1600
              },              
              Type = ParameterType.Decimal
            },
            new Parameter() { 
              Value = new HeuristicLab.Services.Optimization.ControllerService.Model.DecimalValue(){
                Name = "Evaluated Solutions",
                Value = 99100
              },              
              Type = ParameterType.Decimal
            },
            new Parameter() { 
              Value = new HeuristicLab.Services.Optimization.ControllerService.Model.DecimalValue(){
                Name = "Generations",
                Value = 1000
              },              
              Type = ParameterType.Decimal
            },
            new Parameter() { 
              Value = new HeuristicLab.Services.Optimization.ControllerService.Model.DecimalValue(){
                Name = "RelativeDifferenceBestKnownToBest",
                Value = 0
              },              
              Type = ParameterType.Decimal
            },
            new Parameter() { 
              Value = new HeuristicLab.Services.Optimization.ControllerService.Model.DecimalMatrix {
                Name = "Qualities",
                RowNames = new string[] { "CurrentBestQuality", "CurrentAverageQuality", "CurrentWorstQuality", "BestQuality", "BestKnownQuality" },
                Value = new double[][] {
                  // Best Quality
                  new double[]{4000, 3900, 3950, 2500, 3000, 2700, 2300, 2200, 1700, 1850, 1600},
                  // Average
                  new double[]{6000, 5000, 5650, 3750, 4500, 4050, 3450, 3300, 2550, 2775, 2400},
                  // Worst Quality
                  new double[]{8000, 7200, 7350, 5000, 6000, 5400, 4600, 4400, 3400, 3700, 3200},
                  // Best Quality
                  new double[]{4000, 3900, 3950, 2500, 3000, 2700, 2300, 2200, 1700, 1850, 1600},
                  // Best Known Quality
                  new double[]{4000, 3900, 3950, 2500, 3000, 2700, 2300, 2200, 1700, 1850, 1600},
                }
              },              
              Type = ParameterType.Decimal
            }
          }
        }
      };
    }

    public MockupScenarioManager() {
      
    }

    public string DispatchScenario(Model.User user, Model.OptimizationScenario scenario, JobExecutionDetails details) {
      // does nothing
      return "guid";
    }

    public IList<Model.Job> GetJobs(User user) {
      return jobs;
    }

    public Model.Job GetJob(User user, string id) {
      return (from j in jobs where j.Id == id select j).FirstOrDefault();
    }


    public bool DeleteJob(User user, string id) {
      jobs.RemoveAll(j => j.Id == id);
      return true;
    }

    public IList<Model.Run> GetJobResults(User user, string id) {      
      return jobResults[id];
    }

    private static string AssemblyDirectory {
      get {
        string codeBase = Assembly.GetExecutingAssembly().CodeBase;
        UriBuilder uri = new UriBuilder(codeBase);
        string path = Uri.UnescapeDataString(uri.Path);
        return Path.GetDirectoryName(path);
      }
     }

    private IScenarioMapper CompileMapper(string scenarioMapper) {
       // http://stackoverflow.com/questions/3188882/compile-and-run-dynamic-code-without-generating-exe
      using (var csCodeProvider = new Microsoft.CSharp.CSharpCodeProvider()) {
        var cp = new System.CodeDom.Compiler.CompilerParameters() {
          GenerateInMemory = true
        };

        var referencedPaths = Directory.GetFiles(AssemblyDirectory, "*.dll");
        foreach (var loadedAssembly in referencedPaths) {
          cp.ReferencedAssemblies.Add(loadedAssembly);
        }
        cp.ReferencedAssemblies.Add("System.dll");
        cp.ReferencedAssemblies.Add("System.Core.dll");
        cp.ReferencedAssemblies.Add("System.Data.dll");
        cp.ReferencedAssemblies.Add("System.Xml.dll");
        cp.ReferencedAssemblies.Add("System.Xml.Linq.dll");

        var res = csCodeProvider.CompileAssemblyFromSource(
          cp,
          scenarioMapper
        );

        foreach (var error in res.Errors) {
          Console.WriteLine(error);
        }
        
        var firstMapper = res.CompiledAssembly.GetTypes().Where(p => typeof(IScenarioMapper).IsAssignableFrom(p)).FirstOrDefault();        
        return Activator.CreateInstance(firstMapper) as IScenarioMapper;
      }
    }

    public bool AddScenario(User user, string scenarioName, string scenarioXml, string scenarioMapper) {     
      // create scenario mapper
      var mapper = CompileMapper(scenarioMapper);
      if (mapper == null)
        return false;
      
      // insert into table & blob store
      var scenDao = dal.ScenarioDao;
      var blobDao = dal.BlobDao;
      
      Guid scenarioXmlGuid = Guid.NewGuid();
      Guid scenarioMapperGuid = Guid.NewGuid();
      string scenarioXmlId = scenarioName + "_" + scenarioXmlGuid.ToString();
      string scenarioMapperId = scenarioName + "_" + scenarioMapperGuid.ToString();
      if (!blobDao.Add(new StringEntry() { Key = scenarioXmlId, Text = scenarioXml }))
        return false;
      if (!blobDao.Add(new StringEntry() { Key = scenarioMapperId, Text = scenarioMapper }))
        return false;
      if (!scenDao.Add(new ScenarioEntity(scenarioName, scenarioXmlId, scenarioMapperId)))
        return false;

      // everything stored in the DB -> add mapper to dictionary
      if (!mappers.ContainsKey(scenarioName)) {
        lock (lockable) {
          if (!mappers.ContainsKey(scenarioName))
            mappers[scenarioName] = mapper;
        }
      }
      return true;
    }

    public bool DeleteScenario(User user, string scenarioName) {
      // delete from table & blob store
      var scenarioDao = dal.ScenarioDao;
      var blobDao = dal.BlobDao;

      var entity = scenarioDao.FindByName(scenarioName);
      if (entity == null)
        return false;

      blobDao.DeleteByKey(entity.Mapper);
      blobDao.DeleteByKey(entity.Scenario);
      scenarioDao.DeleteByName(scenarioName);            
      return true;
    }


    public string SaveExperiment(User user, Model.Experiment experiment) {
      throw new NotImplementedException();
    }


    public IEnumerable<string> GetExperimentNames(User user) {
      throw new NotImplementedException();
    }


    public bool DeleteExperiment(User user, string experiment) {
      throw new NotImplementedException();
    }


    public Model.Task GetTaskData(User u, string jobId, string taskId) {
      throw new NotImplementedException();
    }

    public Model.Job GetTasks(User u, string jobId) {
      throw new NotImplementedException();
    }


    public Model.Experiment GetExperimentByName(User user, string scenario) {
      throw new NotImplementedException();
    }


    public bool DispatchExperiment(User user, Model.Experiment exp, JobExecutionDetails details) {
      throw new NotImplementedException();
    }


    string IScenarioManager.SaveExperiment(User user, Model.Experiment experiment) {
      throw new NotImplementedException();
    }

    public IEnumerable<Model.Experiment> GetExperiments(User user, bool namesOnly = false) {
      throw new NotImplementedException();
    }

    public Model.Experiment GetExperimentById(User user, string nodeId) {
      throw new NotImplementedException();
    }
  }
}