#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion


using HeuristicLab.Clients.Hive.WebJobManager.Services;
using HeuristicLab.Optimization;
using Microsoft.AspNetCore.SignalR;
using System;
using System.Linq;
using System.Reflection;
using HeuristicLab.Core;

namespace HeuristicLab.Clients.Hive.WebJobManager
{
    /// <summary>
    /// SignalR Hub for displaying the progress when uploading a Job.
    /// Also used to change child distribution and priority for inner tasks.
    /// </summary>
    public class ProgressHub : Hub
    {
        private WebLoginService weblog;
        private Guid userId;
        private FileOpeningService fileopener;
        private void loader()
        {
            weblog = WebLoginService.Instance;
            string uid = Context.QueryString["userid"];
            if (uid == null || uid == "" || Guid.Parse(uid) == Guid.Empty)
            {
                userId = Guid.Empty;
            }
            else
            {
                userId = Guid.Parse(uid);
                fileopener = weblog.getFileOpener(userId);
            }
        }

        /// <summary>
        /// First message from client
        /// </summary>
        /// <param name="receivedString">Client message</param>
        public void HandleMessage(string receivedString)
        {
            loader();
            Clients.Caller.processMessage("Connection Established");
            fileopener.Job.Progress.StatusChanged += runHub;
        }
        /// <summary>
        /// Changes name for the current job to be created
        /// </summary>
        /// <param name="name">Job name</param>
        public void ChangeNameResource(string name, string resource)
        {
            loader();
            if (name != null)
                fileopener.Job.Job.Name = name;
            if (resource != null && resource != "")
            {
                fileopener.Job.Job.ResourceNames += "/" + resource;
            }
        }
        /// <summary>
        /// Toggles distribute child task for a current task
        /// </summary>
        /// <param name="arr">2-dimensional int array. 
        /// First dimension is depth (arr.length == 4 means the item is 4 nodes deep)
        /// Second contains expirement info or batch info. (arr[][0] contains index to select the right experiment sub task,
        /// arr[][1] contains index to select right batch run subtask)</param>
        public void ToggleChild(int[][] arr)
        {
            loader();
            bool change = false;
            string name = "";
            HiveTask current = fileopener.Job.HiveTasks.ToList()[0];
            if (arr.Length == 0)
            {//check if upper job
                current.ItemTask.ComputeInParallel = !current.ItemTask.ComputeInParallel;
                change = current.ItemTask.ComputeInParallel;
                name = current.ItemTask.Name;
            }
            else
            {
                for (var i = 0; i < arr.Length; i++)
                {
                    //loop for depth

                    if (i == arr.Length - 1)//end of depth loop, right current is selected
                    {
                        if (current.ItemTask.Item is BatchRun)
                        {
                            current.ChildHiveTasks[arr[i][1]].ItemTask.ComputeInParallel = !current.ChildHiveTasks[arr[i][1]].ItemTask.ComputeInParallel;
                            change = current.ChildHiveTasks[arr[i][1]].ItemTask.ComputeInParallel;
                            name = current.ChildHiveTasks[arr[i][1]].ItemTask.Name;
                        }
                        else if (current.ItemTask.Item is Experiment)
                        {
                            current.ChildHiveTasks[arr[i][0]].ItemTask.ComputeInParallel = !current.ChildHiveTasks[arr[i][0]].ItemTask.ComputeInParallel;
                            change = current.ChildHiveTasks[arr[i][0]].ItemTask.ComputeInParallel;
                            name = current.ChildHiveTasks[arr[i][0]].ItemTask.Name;
                        }

                    }
                    else
                    {//not deep enough, select right path
                        if (current.ItemTask.Item is BatchRun)
                            current = current.ChildHiveTasks[arr[i][1]]; // select right batch
                        else if (current.ItemTask.Item is Experiment)
                            current = current.ChildHiveTasks[arr[i][0]]; // select right sub task from experiment
                    }
                }
            }
            if (change)
                Clients.Caller.saveComplete("Child distribution activated for " + name);
            else
                Clients.Caller.saveComplete("Child distribution deactivated for " + name);
        }
        public void changeName(int[][] arr, string name, int idname)
        {
            
            if (name != "" && name != null)
            {
                loader();
                string old = "";
                HiveTask current = fileopener.Job.HiveTasks.ToList()[0];
                if (arr.Length == 0)
                {//check if upper job
                    old = current.ItemTask.Name;
                    current.ItemTask.Name = name;

                }
                else
                {
                    for (var i = 0; i < arr.Length; i++)
                    {//loop for depth
                        if (i == arr.Length - 1)
                        {//Right depth reached, change name for current
                            if (current.ItemTask.Item is BatchRun)
                            {
                                old = current.ChildHiveTasks[arr[i][1]].ItemTask.Name;
                                current.ChildHiveTasks[arr[i][1]].ItemTask.Name = name;
                            }
                            else if (current.ItemTask.Item is Experiment)
                            {
                                old = current.ChildHiveTasks[arr[i][0]].ItemTask.Name;
                                current.ChildHiveTasks[arr[i][0]].ItemTask.Name = name;
                            }

                        }
                        else
                        {//not deep enough, choose right path
                            if (current.ItemTask.Item is BatchRun)
                                current = current.ChildHiveTasks[arr[i][1]]; // select right batch
                            else if (current.ItemTask.Item is Experiment)
                                current = current.ChildHiveTasks[arr[i][0]]; // select right sub task from experiment
                        }
                    }
                }
                Clients.Caller.processName(name, idname);
                Clients.Caller.saveComplete( old + " renamed to " + name);
            }
        }
        public void changeRepit(int[][] arr, int repit)
        {
            loader();
            HiveTask current = fileopener.Job.HiveTasks.ToList()[0];
            string Name = "failed";
            if (arr.Length == 0)
            {//check if upper job
                if (current.ItemTask.Item is BatchRun)
                {
                    var b = (BatchRun)current.ItemTask.Item;
                    b.Repetitions = repit;
                    Name = current.ItemTask.Name;
                }

            }
            else
            {
                for (var i = 0; i < arr.Length; i++)
                {//loop for depth
                    if (i == arr.Length - 1)
                    {//Right depth reached, change name for current
                        if (current.ChildHiveTasks[arr[i][0]].ItemTask.Item is BatchRun)
                        {
                            var b = (BatchRun)current.ChildHiveTasks[arr[i][0]].ItemTask.Item;
                            b.Repetitions = repit;
                            Name = current.ChildHiveTasks[arr[i][0]].ItemTask.Name;
                        }
                    }
                    else
                    {//not deep enough, choose right path
                        if (current.ItemTask.Item is BatchRun)
                            current = current.ChildHiveTasks[arr[i][1]]; // select right batch
                        else if (current.ItemTask.Item is Experiment)
                            current = current.ChildHiveTasks[arr[i][0]]; // select right sub task from experiment
                    }
                }
            }
            if (Name == "failed")
                Clients.Caller.createAlert("Something went wrong while changing the repititions, please try again", "danger");
            else
                Clients.Caller.saveComplete("Repititions changed to "+repit+ " for " + Name);

        }
        /// <summary>
        /// Change priority for a node
        /// </summary>
        /// <param name="arr">2-dimensional int array. 
        /// First dimension is depth (arr.length == 4 means the item is 4 nodes deep)
        /// Second contains expirement info or batch info. (arr[][0] contains index to select the right experiment sub task,
        /// arr[][1] contains index to select right batch run subtask)</param>
        /// <param name="prior">Selected priority</param>
        public void ChangePriority(int[][] arr, int prior)
        {
            string name = "";
            loader();
            HiveTask current = fileopener.Job.HiveTasks.ToList()[0];
            if (arr.Length == 0)
            {//check if upper job
                current.Task.Priority = prior;
                name = current.ItemTask.Name;
            }
            else
            {
                for (var i = 0; i < arr.Length; i++)
                {//loop for depth


                    if (i == arr.Length - 1)
                    {//Right depth reached, change priority for current
                        if (current.ItemTask.Item is BatchRun)
                        {
                            current.ChildHiveTasks[arr[i][1]].Task.Priority = prior;
                            name = current.ChildHiveTasks[arr[i][0]].ItemTask.Name;
                        }
                        else if (current.ItemTask.Item is Experiment)
                        {
                            current.ChildHiveTasks[arr[i][0]].Task.Priority = prior;
                            name = current.ChildHiveTasks[arr[i][0]].ItemTask.Name;
                        }

                    }
                    else
                    {//not deep enough, choose right path
                        if (current.ItemTask.Item is BatchRun)
                            current = current.ChildHiveTasks[arr[i][1]]; // select right batch
                        else if (current.ItemTask.Item is Experiment)
                            current = current.ChildHiveTasks[arr[i][0]]; // select right sub task from experiment
                    }
                }
            }
            Clients.Caller.saveComplete("Priority changed for " + name);
        }
        /// <summary>
        /// Used by event 'ProgressChanged' from current uploading Job
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public void runHub(object sender, EventArgs e)
        {
            loader();
            int value = 0;

            switch (fileopener.Job.Progress.Status)
            {
                case "Connecting to server...":
                    value = 0;
                    break;
                case "Uploading Job...":
                    value = 10;
                    break;
                case "Uploading plugins...":
                    value = 30;
                    break;
                case "Uploading tasks...":
                    value = 50;
                    break;
                case "Upload finished":
                    value = 100;
                    break;
                default://Tasks are uploading individually
                    value = (int)(50 + (40 * fileopener.Job.Progress.ProgressValue));
                    break;

            }
            //send info to client
            Clients.Caller.processMessage(fileopener.Job.Progress.Status, value);

        }
        public void paraEdit(int[][] arr, string problem, string name, string type, string value)
        {


            loader();
            HiveTask current = fileopener.Job.HiveTasks.ToList()[0];
            if (arr.Length == 0)
            {//check if upper job
                if (current.ItemTask.Item is Algorithm)
                {
                    searchEditPara(current, problem, name, type, value);
                }
            }
            else
            {
                for (var i = 0; i < arr.Length; i++)
                {//loop for depth
                    if (i == arr.Length - 1)
                    {//Right depth reached, change priority for current
                        if (current.ItemTask.Item is BatchRun)
                        {
                            current = current.ChildHiveTasks[arr[i][1]];
                        }
                        else if (current.ItemTask.Item is Experiment)
                        {
                            current = current.ChildHiveTasks[arr[i][0]];
                        }
                        if (current.ItemTask.Item is Algorithm)
                        {
                            searchEditPara(current, problem, name, type, value);
                        }
                    }
                    else
                    {//not deep enough, choose right path
                        if (current.ItemTask.Item is BatchRun)
                            current = current.ChildHiveTasks[arr[i][1]]; // select right batch
                        else if (current.ItemTask.Item is Experiment)
                            current = current.ChildHiveTasks[arr[i][0]]; // select right sub task from experiment
                    }
                }
            }
        }
        /// <summary>
        /// Generic parameter setter
        /// </summary>
        /// <param name="curr">Current task to edit </param>
        /// <param name="problem">Problem parameter or normal parameter</param>
        /// <param name="name">Property name</param>
        /// <param name="type">Datatype</param>
        /// <param name="value">New value</param>
        private void searchEditPara(HiveTask curr, string problem, string name, string type, string value)
        {
            var prob = problem == "True" ? true : false;

            var dattype = Type.GetType(type);
            if (dattype == null)
            {//Use assemblies to find correct datatype
                foreach (var a in AppDomain.CurrentDomain.GetAssemblies())
                {
                    dattype = a.GetType(type);
                    if (dattype != null)
                        break;
                }
            }
            //find parse method
            var parse = dattype.GetMethod("Parse", new[] { typeof(string) });

            if (parse != null)
            {
                //Parses string to correct datatype
                var val = parse.Invoke(null, new object[] { value });

                //BUGGERS
                // if (name == "DominateOnEqualQualities" || name == "PlusSelection" || name == "ReevaluteElites")
                //   val = ((BoolValue)val).Value;

                // if (name == "ReduceToPopulationSize")
                //name += "Parameter";
                if (val != null)
                {
                    try
                    {
                        IAlgorithm alg = (IAlgorithm)curr.ItemTask.Item;
                        if (prob)
                            alg.Problem.Parameters[name].ActualValue = (IItem)val;
                        else
                        {
                            alg.Parameters[name].ActualValue = (IItem)val;
                        }
                        Clients.Caller.saveComplete("Parameter saved for " + name);
                    }
                    catch (NullReferenceException e)
                    {
                        Console.WriteLine("NullRefException: " + name + " - " + type);
                    }
                    catch (TargetException e)
                    {
                        Console.WriteLine("TargetException: " + name + " - " + type);
                    }
                    catch (NotSupportedException e)
                    {
                        Clients.Caller.createAlert("Parameter " + name + " could not be changed for it is a fixed parameter. All changes done in this view are not saved to Hive.", "danger");
                    }
                }
                else
                    Clients.Caller.createAlert("Format wrong for " + name + " of type " + type + ". Make sure you follow the right format pattern.", "warning");


            }

        }

    }
}