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

namespace comal.timesheets
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class PurchaseOrderModule : ContentPage
    {
        List<PurchaseOrderShell> purchaseOrderShells = new List<PurchaseOrderShell>();
        bool bLoading = true;
        List<string> filterOptions = new List<string>();
        bool firstLoad = true;
        public PurchaseOrderModule()
        {
            InitializeComponent();
            LoadList();
        }

        private async void LoadList()
        {
            await Task.Run(() =>
            {
                bLoading = true;
                purchaseOrderShells.Clear();
                filterOptions.Clear();
                filterOptions.Add("All");

                CoreTable table = DoQuery();

                if (table.Rows.Any())
                    LoadAndDisplayFromTable(table);
            });
        }

        private void LoadAndDisplayFromTable(CoreTable table)
        {
            foreach (CoreRow row in table.Rows)
            {
                purchaseOrderShells.Add(GenerateShellFromRow(row));
            }
            firstLoad = false;
            DisplayList();
        }

        private void DisplayList()
        {
            Device.BeginInvokeOnMainThread(() =>
            {
                searchEnt.Text = "";
                filterOptionsControl.Options = filterOptions;
                filterOptionsControl.CreateRadioButtonsAndSetDefault(filterOptions.First());
                purchaseOrderListView.ItemsSource = purchaseOrderShells;
                filterOptionsControl.OnFilterOptionChanged += FilterOptionsControl_OnFilterOptionChanged;
                bLoading = false;
            });
        }

        private PurchaseOrderShell GenerateShellFromRow(CoreRow row)
        {
            var list = CheckListForNulls(row);

            var purchaseOrderShell = CreateShell(list);

            AddFilterOptions(purchaseOrderShell);

            return purchaseOrderShell;
        }

        private void AddFilterOptions(PurchaseOrderShell purchaseOrderShell)
        {
            if (!string.IsNullOrWhiteSpace(purchaseOrderShell.SupplierName))
            {
                if (!filterOptions.Contains(purchaseOrderShell.SupplierName))
                {
                    filterOptions.Add(purchaseOrderShell.SupplierName);
                }
            }
        }

        private PurchaseOrderShell CreateShell(List<object> list)
        {
            PurchaseOrderShell purchaseOrderShell = new PurchaseOrderShell()
            {
                ID = Guid.Parse(list[0].ToString()),
                PONumber = list[1].ToString(),
                DueDate = "Due: " + DateTime.Parse(list[2].ToString()).ToString("dd-MMMM-yy"),
                Status = list[3].ToString(),
                SupplierID = Guid.Parse(list[4].ToString()),
                SupplierName = list[5].ToString(),
                Notes = list[6].ToString()
            };
            return purchaseOrderShell;
        }

        private List<object> CheckListForNulls(CoreRow row)
        {
            List<object> list = row.Values;
            if (list[0] == null) { list[0] = Guid.Empty; } //0
            if (list[1] == null) { list[1] = ""; } //1
            if (list[2] == null) { list[2] = DateTime.MinValue; } //2
            if (list[3] == null) { list[3] = ""; } //3
            if (list[4] == null) { list[4] = Guid.Empty; } //4
            if (list[5] == null) { list[5] = ""; } //5
            if (list[6] == null) { list[6] = ""; } //6

            return list;
        }

        private CoreTable DoQuery()
        {
            return new Client<PurchaseOrder>().Query
                    (
                    new Filter<PurchaseOrder>(x => x.ClosedDate).IsEqualTo(DateTime.MinValue),
                    new Columns<PurchaseOrder>(
                        x => x.ID, //0
                        x => x.PONumber, //1
                        x => x.DueDate, //2
                        x => x.Status, //3
                        x => x.SupplierLink.ID, //4
                        x => x.SupplierName, //5
                        x => x.Notes //6
                        ),
                    new SortOrder<PurchaseOrder>(x => x.DueDate, SortDirection.Descending)
                    );
        }

        private void FilterOptionsControl_OnFilterOptionChanged(string filterOption)
        {
            if (filterOption == filterOptionsControl.CurrentOption)
                return;

            bLoading = true;
            searchEnt.Text = "";
            bLoading = false;

            filterOptionsControl.CurrentOption = filterOption;
            if (filterOption == "All")
            {
                purchaseOrderListView.ItemsSource = purchaseOrderShells;
                listCountLbl.Text = "Number of items in list: " + purchaseOrderShells.Count;
            }
            else
            {
                var list = purchaseOrderShells.Where(x => x.SupplierName.Equals(filterOption));
                purchaseOrderListView.ItemsSource = list;
                listCountLbl.Text = "Number of items in list: " + list.Count();
            }
        }

        private async void PurchaseOrder_Clicked(object sender, EventArgs e)
        {
            PurchaseOrderShell purchaseOrderShell = purchaseOrderListView.SelectedItem as PurchaseOrderShell;
            PurchaseOrderDetails details = new PurchaseOrderDetails(purchaseOrderShell);
            Navigation.PushAsync(details);
        }

        private void SearchEnt_Changed(object sender, EventArgs e)
        {
            if (bLoading)
                return;
            if (!string.IsNullOrWhiteSpace(searchEnt.Text))
            {
                RunSearch();
            }
            else
            {
                listCountLbl.Text = "Number of items in list: " + purchaseOrderShells.Count;
                purchaseOrderListView.ItemsSource = purchaseOrderShells;
            }
        }

        private async void RunSearch()
        {
            await Task.Run(() =>
            {
                List<PurchaseOrderShell> searchList = new List<PurchaseOrderShell>();
                if (filterOptionsControl.CurrentOption == "All")
                {
                    searchList = purchaseOrderShells;
                }
                else
                {
                    var newList = purchaseOrderShells.Where(x => x.SupplierName.Equals(filterOptionsControl.CurrentOption));
                    foreach (var shell in newList)
                    {
                        searchList.Add(shell);
                    }
                }

                var list = searchList.Where(x =>
                x.PONumber.Contains(searchEnt.Text) || x.PONumber.Contains(UpperCaseFirst(searchEnt.Text)) || x.PONumber.Contains(searchEnt.Text.ToLower()) || x.PONumber.Contains(searchEnt.Text.ToUpper()) ||
                x.Notes.Contains(searchEnt.Text) || x.Notes.Contains(UpperCaseFirst(searchEnt.Text)) || x.Notes.Contains(searchEnt.Text.ToLower()) || x.Notes.Contains(searchEnt.Text.ToUpper()) ||
                x.SupplierName.Contains(searchEnt.Text) || x.SupplierName.Contains(UpperCaseFirst(searchEnt.Text)) || x.SupplierName.Contains(searchEnt.Text.ToLower()) || x.SupplierName.Contains(searchEnt.Text.ToUpper()) ||
                x.Status.Contains(searchEnt.Text) || x.Status.Contains(UpperCaseFirst(searchEnt.Text)) || x.Status.Contains(searchEnt.Text.ToLower()) || x.Status.Contains(searchEnt.Text.ToUpper()) ||
                x.DueDate.Contains(searchEnt.Text) || x.DueDate.Contains(UpperCaseFirst(searchEnt.Text)) || x.DueDate.Contains(searchEnt.Text.ToLower()) || x.DueDate.Contains(searchEnt.Text.ToUpper())
                );
                Device.BeginInvokeOnMainThread(() =>
                {
                    listCountLbl.Text = "Number of items in list: " + list.Count();
                    purchaseOrderListView.ItemsSource = list;
                });
            });
        }
        static String UpperCaseFirst(string s)
        {
            char[] a = s.ToCharArray();
            a[0] = char.ToUpper(a[0]);
            return new string(a);
        }
    }
}