using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace PRS.Mobile
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class StoreRequiList 
    {
        List<RequiShell> requiShells = new List<RequiShell>();
        public StoreRequiList()
        {
            InitializeComponent();
            RequiItems.HoldingsLoaded = true;
            if (Device.RuntimePlatform.Equals(Device.iOS))
            {
                imageBtn0.Margin = new Thickness(0);
                imageBtn0.VerticalOptions = LayoutOptions.FillAndExpand;
                imageBtn0.HeightRequest = 160;
                takerequinow.Margin = new Thickness(0);
                takerequinow.VerticalOptions = LayoutOptions.FillAndExpand;
                takerequinow.HeightRequest = 160;
                storereqimg.Margin = new Thickness(0);
                storereqimg.HeightRequest = 120;
            }
        }

        protected override void OnAppearing()
        {
            LoadList();
            base.OnAppearing();
        }

        private void LoadList()
        {
            Task.Run(() =>
            {
                requiShells.Clear();

                CoreTable table = DoRequisitionQuery();
                while (table == null)
                    table = DoRequisitionQuery();

                foreach (var row in table.Rows)
                {
                    RequiShell requiShell = new RequiShell();
                    requiShell.ID = row.Get<Requisition, Guid>(x => x.ID);
                    requiShell.Number = "No. " + row.Get<Requisition,int>(x => x.Number);
                    requiShell.Due = "Due " + row.Get<Requisition, DateTime>(x => x.Due).ToString("dd MMM yy");
                    requiShell.Contact = "Contact: " + row.Get<Requisition, string>(x => x.RequestedBy.Name);
                    requiShell.Job = "(" + row.Get<Requisition, string>(x => x.JobLink.JobNumber) + ") " + row.Get<Requisition, string>(x => x.JobLink.Name);
                    requiShell.Request = row.Get<Requisition, string>(x => x.Request);
                    string notes = CheckNotes(row.Get<Requisition, string[]>(x => x.Notes));
                    requiShell.Request = requiShell.Request + System.Environment.NewLine + notes;

                    requiShells.Add(requiShell);
                }
                Device.BeginInvokeOnMainThread(() =>
                {
                    requisListView.ItemsSource = null;
                    requisListView.ItemsSource = requiShells;
                    listLbl.Text = "List of Unfilled Requis (" + requiShells.Count + ")";
                });
            });
        }

        private CoreTable DoRequisitionQuery()
        {
            try
            {
                return new Client<Requisition>().Query(
                            new Filter<Requisition>(x => x.Filled).IsEqualTo(DateTime.MinValue),
                            new Columns<Requisition>(ColumnTypeFlags.None).Add(
                                x => x.ID, 
                                x => x.Number,
                                x => x.Due,
                                x => x.RequestedBy.Name,
                                x => x.JobLink.JobNumber,
                                x => x.JobLink.Name,
                                x => x.Request,
                                x => x.Notes
                                ),
                            new SortOrder<Requisition>(x => x.Due)
                        );
            }
            catch (Exception ex)
            {
                InABox.Mobile.MobileLogging.Log(ex);
                return null;
            }
        }

        private string CheckNotes(string[] notes)
        {
            string combinednotes = "----------" + System.Environment.NewLine + "NOTES: " + System.Environment.NewLine;
            if (notes.Count() > 0)
            {
                foreach (var note in notes)
                {
                    combinednotes = combinednotes + note + System.Environment.NewLine;
                }
            }
            return combinednotes;
        }

        private void Requi_Clicked(object sender, EventArgs e)
        {
            RequiShell requiShell = requisListView.SelectedItem as RequiShell;
            StoreRequiScannerPage storeRequiScannerPage = new StoreRequiScannerPage(requiShell.ID);
            Navigation.PushAsync(storeRequiScannerPage);
        }

        private void TakeStockNow_Tapped(object sender, EventArgs e)
        {
            StoreRequiScannerPage page = new StoreRequiScannerPage(Guid.Empty);
            Navigation.PushAsync(page);
        }

        private void NewRequiRequest_Tapped(object sender, EventArgs e)
        {
            StoreRequiConfirmationPage storeRequiConfirmationPage = new StoreRequiConfirmationPage();
            Navigation.PushAsync(storeRequiConfirmationPage);
        }
    }

    public class RequiShell
    {
        public Guid ID { get; set; }
        public string Number { get; set; }
        public string Due { get; set; }
        public string Contact { get; set; }
        public string Job { get; set; }

        public string Request { get; set; }

        public RequiShell()
        {
            ID = Guid.Empty;
            Number = "";
            Due = "";
            Due = "";
            Job = "";
            Request = "";
        }
    }
}