using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.AutoComplete.Editors;
using Tango.BL;
using Tango.BL.ActionLogs;
using Tango.BL.Builders;
using Tango.BL.DTO;
using Tango.BL.Entities;
using Tango.BL.Enumerations;
using Tango.Core;
using Tango.Core.Commands;
using Tango.Logging;
using Tango.MachineStudio.Common;
using Tango.MachineStudio.Common.Notifications;
using Tango.MachineStudio.ThreadExtensions.Models;
using Tango.Settings;
using Tango.SharedUI;

namespace Tango.MachineStudio.ThreadExtensions.ViewModels
{
    public class TestResultsViewVM : ViewModel
    {
        private INotificationProvider _notification;
        private IActionLogManager _actionLogManager;

        private ObservablesContext _active_context;

        public event EventHandler SaveTestResults;

        #region Properties
        private SynchronizedObservableCollection<RmlExtensionTestResult> _selectedTestResults;

        public SynchronizedObservableCollection<RmlExtensionTestResult> SelectedTestResults
        {
            get { return _selectedTestResults; }
            set { _selectedTestResults = value; }
        }


        private ObservableCollection<TestResultViewVM> _resultTabs;

        public ObservableCollection<TestResultViewVM> ResultTabs
        {
            get { return _resultTabs; }
            set { _resultTabs = value; }
        }

        private TestResultViewVM _selectedTab;
        /// <summary>
        /// Gets or sets the selected tab.
        /// </summary>
        public TestResultViewVM SelectedTab
        {
            get { return _selectedTab; }
            set
            {
                _selectedTab = value;
                RaisePropertyChangedAuto();

                foreach (var tab in ResultTabs.Where(x => x != _selectedTab))
                {
                    tab.IsSelected = false;
                }

                if (_selectedTab != null)
                {
                    _selectedTab.IsSelected = true;
                }

                //EnableRenderingForSelectedTabGraphs();
            }
        }

        protected string _selectedMachineGuid;
        /// <summary>
        /// Gets or sets the selected machine.
        /// </summary>
        public String SelectedMachineGUID
        {
            get { return _selectedMachineGuid; }
            set
            {
                if (value != null && _selectedMachineGuid != value)
                {
                    _selectedMachineGuid = value;
                    SelectedMachineChanged();
                    RaisePropertyChangedAuto();
                    InvalidateRelayCommands();
                }
            }
        }

        private string _RMLExtentionGUID;

        public string RMLExtemtionGUID
        {
            get { return _RMLExtentionGUID; }
            set { _RMLExtentionGUID = value;
                OnRMLExtemtionGUIDChanged();
            }
        }

        private string _threadName;

        public string ThreadName
        {
            get { return _threadName; }
            set { _threadName = value;
                RaisePropertyChangedAuto(); }
        }


        #endregion

        #region Commands
        /// <summary>
        /// Gets or sets the add tab command.
        /// </summary>
        public RelayCommand AddTabCommand { get; set; }

        /// <summary>
        /// Gets or sets the remove tab command.
        /// </summary>
        public RelayCommand<TestResultViewVM> RemoveTabCommand { get; set; }
        
        /// <summary>
        /// Gets or sets the rename tab command.
        /// </summary>
        public RelayCommand RenameTabCommand { get; set; }

        public RelayCommand FlytoProcessParametersCommand { get; set; }

        public RelayCommand SaveCommand { get; set; }

        #endregion

        public TestResultsViewVM(INotificationProvider notification, IActionLogManager actionLogManager)
        {
            _notification = notification;
            _actionLogManager = actionLogManager;
            ResultTabs = new ObservableCollection<TestResultViewVM>();
            
            AddTabCommand = new RelayCommand(() => AddNewTab());
            RemoveTabCommand = new RelayCommand<TestResultViewVM>(RemoveTab);
            RenameTabCommand = new RelayCommand(RenameTab);

            FlytoProcessParametersCommand = new RelayCommand(FlytoProcessParameters);
            SaveCommand = new RelayCommand(Save, () => IsFree);
        }

        #region Tabs modification
       
        /// <summary>
        /// Removes the specified tab.
        /// </summary>
        /// <param name="tab">The tab.</param>
        private void RemoveTab(TestResultViewVM tab)
        {
            if (ResultTabs.Count == 1)
                return;
            if (_notification.ShowQuestion("Are you sure you want to delete the selected tab?"))
            {
                 _active_context.RubbingResults.RemoveRange(tab.TestResult.RubbingResults);
                tab.TestResult.RubbingResults = null;
                
                _active_context.TensileResults.RemoveRange(tab.TestResult.TensileResults);
                tab.TestResult.TensileResults = null;
                
                _active_context.RmlExtensionTestResults.Remove(tab.TestResult);

                ResultTabs.Remove(tab);
                SelectedTab = ResultTabs.LastOrDefault();
                _active_context.SaveChanges();
               
            }
        }

        /// <summary>
        /// Adds a new tab.
        /// </summary>
        private bool AddNewTab(String name = null)
        {
            if (ResultTabs.Count > 7)
            {
                //_notification.ShowError("Cannot exceed the maximum number of 8 tabs. You can remove a tab, or create a new project.");
                return false;
            }

            if (name == null)
            {
                name = _notification.ShowTextInput("Enter tab name", "Tab Name", "Test");
            }
            
            if (!String.IsNullOrWhiteSpace(name))
            {
                var tab = CreateNewTestResultVM(name, (ResultTabs.Count + 1));
                ResultTabs.Add(tab);
                _active_context.RmlExtensionTestResults.Add(tab.TestResult);
                SelectedTab = tab;
                return true;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// Renames the tab.
        /// </summary>
        /// <param name="tab">The tab.</param>
        private void RenameTab()
        {
            if (SelectedTab != null)
            {
                var name = _notification.ShowTextInput("Enter tab name", "Tab Name", SelectedTab.TestResult.Name);

                if (!String.IsNullOrWhiteSpace(name))
                {
                    SelectedTab.TestResult.Name = name;
                }
            }
        }
        #endregion

        #region Loading test results

        private void OnRMLExtemtionGUIDChanged()
        {
            ResultTabs.Clear();
            SelectedTab = null;
        }

        private void SelectedMachineChanged()
        {
            ResultTabs.Clear();
            SelectedTab = null;
            LoadTestResults();
        }
        public async void LoadTestResults()
        {
            if (String.IsNullOrEmpty(SelectedMachineGUID))
            {
                _notification.ShowWarning(LogManager.Log($" Please, select machine.", LogCategory.Warning));
                return;
            }

            try
            {
                IsFree = false;
            if (_active_context != null)
            {
                _active_context.Dispose();
            }
            _active_context = ObservablesContext.CreateDefault();
            ResultTabs.Clear();
            LogManager.Log("Loading selected test results...");

                using (_notification.PushTaskItem("Loading Test Results Parameters ..."))
                {
                    var testResults = await new RMLExtensionTestResultsCollectionBuilder(_active_context).SetAll().ForRMLExtension(RMLExtemtionGUID).ForMachine(SelectedMachineGUID).WithRubbingAndTensileResults().BuildAsync();
                    SelectedTestResults = testResults.OrderBy(x => x.ResultIndex).ToSynchronizedObservableCollection();
                    foreach (var result in SelectedTestResults)
                    {
                        ResultTabs.Add(new TestResultViewVM(_notification, _actionLogManager) { TestResult = result, ThreadName = ThreadName });
                        if (result.ResultIndex == 1)
                        {
                            SelectedTab = ResultTabs[ResultTabs.Count - 1];
                        }
                    }
                    if (ResultTabs.Count == 0)
                    {
                        SelectedTab = CreateNewTestResultVM("Untitled", 1);
                        ResultTabs.Add(SelectedTab);
                        _active_context.RmlExtensionTestResults.Add(SelectedTab.TestResult);
                        await _active_context.SaveChangesAsync();
                    }
                }
                IsFree = true;
            }
            catch (Exception ex)
            {
                LogManager.Log(ex, $"Error loading TestResults.\n{ex.FlattenMessage()}");
            }
            finally
            {
                IsFree = true;
            }
        }

        private TestResultViewVM CreateNewTestResultVM(string name, int index)
        {
            TestResultViewVM newtab = new TestResultViewVM(_notification, _actionLogManager) {  ThreadName = ThreadName };
            newtab.TestResult = new RmlExtensionTestResult() { RmlsExtensionsGuid = RMLExtemtionGUID, MachineGuid = SelectedMachineGUID, ResultIndex = index, Name = name, BtsrMax = 0.0, BtsrMin = 0.0, DryerTemperature = 0, TunnelTemperature = 0, TunnelFlow = 0.0, TunnelAvgTemperature = 0.0, TensionHeadMax = 0.0,
            TensionHeadMin = 0.0, TensioinAfterDryerMax = 0.0, TensionAfterDryerMin = 0.0, TensionWinderMax = 0.0, TensionWinderMin = 0.0, PullerTensionMax = 0.0, PullerTensionMin = 0.0, ExitTensionMax = 0.0, ExitTensionMin = 0.0, SeverityZone1Max = 0.0, SeverityZone1Min = 0.0, SeverityZone2Max = 0.0, SeverityZone2Min = 0.0,
            RefLubVersion="", RefCof = 0.0, RefLub = 0.0, ThreadLubVersion = "", ThreadCof = 0.0, ThreadLub = 0.0, Conclusions="", Comment=""};
            var rubbingresults = new SynchronizedObservableCollection<RubbingResult>();
            rubbingresults.Add(new RubbingResult() { RmlExtensionTestResultsGuid = newtab.TestResult.Guid, TestResultColor = TestResultColors.CYAN });
            rubbingresults.Add(new RubbingResult() { RmlExtensionTestResultsGuid = newtab.TestResult.Guid, TestResultColor = TestResultColors.MAGENTA });
            rubbingresults.Add(new RubbingResult() { RmlExtensionTestResultsGuid = newtab.TestResult.Guid, TestResultColor = TestResultColors.YELLOW });
            rubbingresults.Add(new RubbingResult() { RmlExtensionTestResultsGuid = newtab.TestResult.Guid, TestResultColor = TestResultColors.BLACK });
            newtab.TestResult.RubbingResults = rubbingresults;

            var tensileresults = new SynchronizedObservableCollection<TensileResult>();
            tensileresults.Add(new TensileResult() { RmlExtensionTestResultsGuid = newtab.TestResult.Guid, TestResultColor = TestResultColors.CYAN, ColorPercent = 100 });
            tensileresults.Add(new TensileResult() { RmlExtensionTestResultsGuid = newtab.TestResult.Guid, TestResultColor = TestResultColors.BLACK, ColorPercent = 100 });
            tensileresults.Add(new TensileResult() { RmlExtensionTestResultsGuid = newtab.TestResult.Guid, TestResultColor = TestResultColors.CYAN, ColorPercent = 200 });
            tensileresults.Add(new TensileResult() { RmlExtensionTestResultsGuid = newtab.TestResult.Guid, TestResultColor = TestResultColors.BLACK, ColorPercent = 200 });
            tensileresults.Add(new TensileResult() { RmlExtensionTestResultsGuid = newtab.TestResult.Guid, TestResultColor = TestResultColors.WHITE, ColorPercent = null });
            newtab.TestResult.TensileResults = tensileresults;

            return newtab;
        }

        #endregion
        #region Save
        public void FlytoProcessParameters()
        {

        }

        public async void Save()
        {
            if (String.IsNullOrEmpty(SelectedMachineGUID))
            {
                _notification.ShowWarning(LogManager.Log($"Could not save Test Results. Please, select machine.", LogCategory.Warning));
                return;
            }
            try
            {
                IsFree = false;
                await Task.Factory.StartNew(() =>
                {
                    foreach (var tab in ResultTabs)
                    {
                        tab.TestResult.LastUpdated = DateTime.UtcNow;
                    }
                    _active_context.SaveChanges();
                });
               
                LoadTestResults();
            }
            catch (Exception ex)
            {
                LogManager.Log(ex, "Could not save test results.");
                _notification.ShowError($"An error occurred while trying to save test results.\n{ex.Message}");
            }
            finally
            {
                IsFree = true;
                EventHandler handler = SaveTestResults;
                handler?.Invoke(this, new EventArgs());
            }
        }

        #endregion
    }
}