using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Comal.Classes;
using Comal.Classes.SecurityDescriptors;
using InABox.Configuration;
using Xamarin.Forms.Xaml;
using InABox.Core;
using InABox.Mobile;
using InABox.Mobile.Shared;

namespace PRS.Mobile
{


    
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class SiteModule
    {
        private JobShell _job;

        private SiteModuleSettings _settings;
        
        private CancellationTokenSource _pollingToken;
        
        public SiteModule()
        {
            _settings = new LocalConfiguration<SiteModuleSettings>().Load();
            
            InitializeComponent();
            
            ProgressVisible = true;
            
            SiteDocuments.IsVisible = Security.IsAllowed<CanViewJobDocumentMileStoneFiles>();
            
            // ** Not Yet Implemented **
            //CanApproveJobRequisitions.IsVisible = InABox.Core.Security.CanView<PurchaseOrder>()
            
            Manufacturing.IsVisible = Security.IsAllowed<CanViewManufacturingOnMobile>();

            JobTasks.IsVisible = Security.IsAllowed<CanViewOthersTasks>();
            JobRequis.IsVisible = Security.IsAllowed<ViewMobileStoreRequisModule>();
            
            Task.Run(() =>
            {
                App.Data.Jobs.Refresh(false);
                _job = App.Data.Jobs.FirstOrDefault(x => x.ID == _settings.JobID);
            }).BeginInvokeOnMainThread((task) =>
            {
                SelectJob.Text = _job?.DisplayName ?? "Select Job";
                SiteForms.Alert = "";
                SelectJob.IsEnabled = true;
                EnableModules();
                ProgressVisible = false;
            });         
        }

        protected override void OnAppearing()
        {
            _pollingToken = new CancellationTokenSource();
            StartMonitoringITPForms();
            StartMonitoringForms();
            StartMonitoringTasks();
            base.OnAppearing();

        }

        protected override void OnDisappearing()
        {
            base.OnDisappearing();
            _pollingToken.Cancel();
        }
        
        private void StartMonitoringITPForms()
        {
            var token = _pollingToken.Token;
            Task.Run(() =>
                {
                    
                    while (!_pollingToken.Token.IsCancellationRequested)
                    {
                        Guid jobid = _job?.ID ?? Guid.Empty;
                        if (App.Data.IsConnected() && (jobid != Guid.Empty))
                        {
                            var _model = new JobITPFormModel(App.Data,
                                () => new Filter<JobITPForm>(x => x.Parent.Job.ID).IsEqualTo(jobid).And(x=>x.Form.ID).IsNotEqualTo(Guid.Empty)
                            );
                            _model.Refresh(true);
                            Dispatcher.BeginInvokeOnMainThread(() =>
                            {
                                int count = _model.Items.Count(x => x.Completed.IsEmpty());
                                SiteITPForms.Alert = count > 0
                                    ? count.ToString()
                                    : "";
                            });
                        }
                        else
                            Dispatcher.BeginInvokeOnMainThread(() =>
                            {
                                SiteITPForms.Alert = "";
                            });

                        Task.Delay(TimeSpan.FromSeconds(30), token)
                            .Wait(token);
                    }
                },
                token
            );
        }
        
        private void StartMonitoringForms()
        {
            var token = _pollingToken.Token;
            Task.Run(() =>
                {
                    
                    while (!_pollingToken.Token.IsCancellationRequested)
                    {
                        Guid jobid = _job?.ID ?? Guid.Empty;
                        if (App.Data.IsConnected() && (jobid != Guid.Empty))
                        {
                            JobFormModel _model = new JobFormModel(App.Data,
                                () => new Filter<JobForm>(x => x.Parent.ID).IsEqualTo(jobid));
                            _model.Refresh(true);
                            Dispatcher.BeginInvokeOnMainThread(() =>
                            {
                                int count = _model.Items.Count(x => x.Completed.IsEmpty());
                                SiteForms.Alert = count > 0
                                    ? count.ToString()
                                    : "";
                            });
                        }
                        else
                            Dispatcher.BeginInvokeOnMainThread(() =>
                            {
                                SiteForms.Alert = "";
                            });

                        Task.Delay(TimeSpan.FromSeconds(30), token)
                            .Wait(token);
                    }
                },
                token
            );
        }

        private void StartMonitoringTasks()
        {
            var token = _pollingToken.Token;
            Task.Run(
                async () =>
                {
                    while (!_pollingToken.Token.IsCancellationRequested)
                    {
                        Guid jobid = _job?.ID ?? Guid.Empty;
                        if (App.Data.IsConnected() && (jobid != Guid.Empty))
                        {
                            var _model = new JobKanbanModel(
                                App.Data,
                                () => new Filter<Kanban>(x => x.JobLink.ID).IsEqualTo(jobid)
                            );
                            _model.Refresh(true);
                            Dispatcher.BeginInvokeOnMainThread(() =>
                            {
                                int count = _model.Items.Count(x=>x.Status == KanbanStatus.Open);
                                JobTasks.Alert = count > 0
                                    ? count.ToString()
                                    : "";
                            });
                        }
                        else
                            Dispatcher.BeginInvokeOnMainThread(() =>
                            {
                                JobTasks.Alert = "";
                            });
                        
                        Task.Delay(TimeSpan.FromSeconds(30), token)
                            .Wait(token);

                    }
                },
                token
            );
        }
        
        protected override void UpdateTransportStatus()
        {
            base.UpdateTransportStatus();
            EnableModules();
        }

        private void EnableModules()
        {
            foreach (var menu in Menu.Items)
                menu.IsEnabled = App.Data.IsConnected() && (_job != null);
        }

        private void SelectJobBtn_Clicked(object sender, EventArgs e)
        {
            SelectionPage jobs = new JobSelectionPage(
                (job) =>
                {
                    var  _sitesettings = new LocalConfiguration<SiteDocumentsSettings>().Load();
                    _sitesettings.FolderID = Guid.Empty;
                    new LocalConfiguration<SiteDocumentsSettings>().Save(_sitesettings);
                    
                    new LocalConfiguration<SiteModuleSettings>().Save(new SiteModuleSettings() { JobID = job.ID });
                    _job = job;
                    SelectJob.Text = _job?.DisplayName ?? "Select Job";
                    SiteForms.Alert = "";
                });
            Navigation.PushAsync(jobs);
        }
        
        private void SiteITPForms_OnTapped(MobileModuleItem sender, ModuleMenuItemTappedArgs args)
        {
            Navigation.PushAsync(new SiteITPs(_job));
        }

        private void SiteDocuments_OnTapped(MobileModuleItem sender, ModuleMenuItemTappedArgs args)
        {
            Navigation.PushAsync(new SiteDocuments(_job));
        }

        private void SiteForms_OnTapped(MobileModuleItem sender, ModuleMenuItemTappedArgs args)
        {
            Navigation.PushAsync(new SiteForms(_job));
        }

        private void GeneralDocuments_OnTapped(MobileModuleItem sender, ModuleMenuItemTappedArgs args)
        {
            Navigation.PushAsync(new JobWebDocuments(_job));
        }

        // private void JobRequisitions_OnTapped(ModuleMenuItem sender, ModuleMenuItemTappedArgs args)
        // {
        //     throw new NotImplementedException();
        // }
        
        private void Manufacturing_OnTapped(MobileModuleItem sender, ModuleMenuItemTappedArgs args)
        {
            Navigation.PushAsync(new SiteManufacturing(_job));
        }

        private void JobTasks_OnTapped(MobileModuleItem sender, ModuleMenuItemTappedArgs args)
        {
            var model = new JobKanbanModel(
                App.Data,
                () => new Filter<Kanban>(x => x.JobLink.ID).IsEqualTo(_job?.ID ?? CoreUtils.FullGuid),
                () => CoreRepository.CacheFileName<Kanban>($"{_job.ID}.")
            );
            model.ItemAdded += (o, createdArgs) =>
            {
                createdArgs.Item.JobID = _job.ID;
                createdArgs.Item.JobNumber = _job.JobNumber;
                createdArgs.Item.JobName = _job.Name;
            };

            var jobtasks = new KanbanList()
            {
                Model = model,
                Title = _job?.DisplayName ?? "Job Tasks"
            };
            Navigation.PushAsync(jobtasks);
        }

        private void JobRequis_OnTapped(MobileModuleItem sender, ModuleMenuItemTappedArgs args)
        {
            Navigation.PushAsync(new RequisitionList(_job, RequisitionEditMode.EditRequest));
        }
    }
}