prs/prs.mobile.new/PRS.Mobile/Modules/Warehousing/OldWarehousing/WarehouseSelectionPage.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using Xamarin.Forms;
using XF.Material.Forms.UI;
using XF.Material.Forms.UI.Dialogs;
using System.Threading.Tasks;

namespace PRS.Mobile
{
    public delegate void ExitWarehousingSelectedEvent();
    public partial class WarehouseSelectionPage 
    {
        public event ExitWarehousingSelectedEvent OnExitSelected;
        #region Fields
        List<ProductShell> productShells = new List<ProductShell>();
        bool productsLoaded = false;
        bool loadedFromProducts = false;
        ScannerPage _scannerpage = null;
        Guid _warehouseid = Guid.Empty;
        String _warehousename = "Select Warehouse";
        Guid _areaid = Guid.Empty;
        String _areaname = "Select Area";
        Guid _locationid = Guid.Empty;
        String _locationname = "Select Location";
        bool _istransient = false;
        StockHoldingPage _holdingpage = null;
        Job job = new Job();

        #endregion

        #region Constructors
        public WarehouseSelectionPage() //(Employee employee)
        {
            InitializeComponent();
            AddToolbarItems();          
        }

        public WarehouseSelectionPage(string locationCode) //For loading from Products Module
        {
            loadedFromProducts = true;
            InitializeComponent();
            AddToolbarItems();
            LoadFromProductsModule(locationCode);
            UpdateScreen();
        }

        private void AddToolbarItems()
        {
            Title = "Warehousing";
            NavigationPage.SetHasBackButton(this, false);
            ToolbarItems.Clear();
            ToolbarItems.Add(new ToolbarItem("Exit", "", () =>
            {
                OnExitSelected?.Invoke();
                Navigation.PopAsync();
            }));
            ToolbarItems.Add(new ToolbarItem("Back", "", () =>
            {
                Navigation.PopAsync();
            }));
        }

        #endregion

        #region OnAppearing and Update Screen
        protected override void OnAppearing()
        {
            base.OnAppearing();

            if (_scannerpage != null)
                _scannerpage = null;

            if (_holdingpage != null)
                _holdingpage = null;

            UpdateScreen();

        }

        private void UpdateScreen()
        {
            Warehouse.Text = _warehousename;
            Warehouse.SetValue(Grid.ColumnSpanProperty, _warehouseid == Guid.Empty ? 3 : 2);
            Warehouse.Margin = new Thickness(10, 10, _warehouseid == Guid.Empty ? 5 : 0, 0);
            Warehouse_Clear.IsVisible = _warehouseid != Guid.Empty;
            Warehouse_Clear.Margin = new Thickness(0, 10, 5, 0);

            Area.Text = _areaname;
            Area.SetValue(Grid.ColumnSpanProperty, _areaid == Guid.Empty ? 3 : 2);
            Area.Margin = new Thickness(10, 0, _areaid == Guid.Empty ? 5 : 0, 0);
            Area_Clear.IsVisible = _areaid != Guid.Empty;
            Area_Clear.Margin = new Thickness(0, 0, 5, 0);

            Location_New.IsVisible = (_areaid != Guid.Empty) && (_locationid == Guid.Empty);
            Location_New.Margin = new Thickness(10, 0, 0, 0);

            Location.Text = _locationname;
            Location.SetValue(Grid.ColumnProperty, (_areaid != Guid.Empty) && (_locationid == Guid.Empty) ? 1 : 0);
            Location.SetValue(Grid.ColumnSpanProperty, _locationid != Guid.Empty ? 2 : _areaid != Guid.Empty ? 2 : 3);
            Location.Margin = new Thickness(Location_New.IsVisible ? 0 : 10, 0, _locationid == Guid.Empty ? 5 : 0, 0);

            Location_Clear.IsVisible = _locationid != Guid.Empty;
            Location_Clear.Margin = new Thickness(0, 0, 5, 0);

            ReceiveGrid.Opacity = _locationid != Guid.Empty ? 1.0F : 0.3F;
            IssueGrid.Opacity = _locationid != Guid.Empty ? 1.0F : 0.3F;
            MoveGrid.Opacity = _locationid != Guid.Empty ? 1.0F : 0.3F;
            TransferGrid.Opacity = _locationid != Guid.Empty ? 1.0F : 0.3F;
            StocktakeGrid.Opacity = _locationid != Guid.Empty ? 1.0F : 0.3F;
        }
        void LoadFromProductsModule(string locationCode)
        {
            CoreTable table = new Client<StockLocation>().Query(
                new Filter<StockLocation>(x => x.Code).IsEqualTo(locationCode),
                new Columns<StockLocation>(
                    x => x.ID,
                    x => x.Description,
                    x => x.Area.Warehouse.ID,
                    x => x.Area.Warehouse.Description,
                    x => x.Area.ID,
                    x => x.Area.Description
                    ),
                null
                );
            if (table.Rows.Any())
            {
                CoreRow row = table.Rows.FirstOrDefault();
                StockLocation location = row.ToObject<StockLocation>();
                _warehouseid = location.Area.Warehouse.ID;
                _warehousename = location.Area.Warehouse.Description;
                _areaid = location.Area.ID;
                _areaname = location.Area.Description;
                _locationid = location.ID;
                _locationname = location.Description;
            }
        }
        #endregion

        #region Warehouse/Area/Location buttons clicked
        void Warehouse_Clicked(System.Object sender, System.EventArgs e)
        {
            GenericSelectionPage page = new GenericSelectionPage(
                "Select Warehouse",
                    new SelectionViewModel<StockWarehouse>(
                    new Filter<StockWarehouse>(X => X.Active).IsEqualTo(true),
                    new Expression<Func<StockWarehouse, object>>[] { X => X.Description },
                    new Expression<Func<StockWarehouse, object>>[] { },
                    new SortOrder<StockWarehouse>(x => x.Description)
                )
            );
            page.OnItemSelected += (o,e) =>
            {

                var warehouse = e.Row.ToObject<StockWarehouse>();
                if (_warehouseid != warehouse.ID)
                {
                    _warehouseid = warehouse.ID;
                    _warehousename = warehouse.Description;
                    _areaid = Guid.Empty;
                    _areaname = "Select Area";
                    _locationid = Guid.Empty;
                    _locationname = "Select Location";
                }
            };
            Navigation.PushAsync(page);
        }

        void Area_Clicked(System.Object sender, System.EventArgs e)
        {

            Filter<StockArea> areafilter = new Filter<StockArea>(X => X.Active).IsEqualTo(true);
            if (_warehouseid != Guid.Empty)
                areafilter = areafilter.And(x => x.Warehouse.ID).IsEqualTo(_warehouseid);

            GenericSelectionPage page = new GenericSelectionPage(
                "Select Area",
                    new SelectionViewModel<StockArea>(
                    areafilter,
                    new Expression<Func<StockArea, object>>[] { X => X.Description },
                    new Expression<Func<StockArea, object>>[] { x => x.Warehouse.ID, x => x.Warehouse.Description },
                    new SortOrder<StockArea>(x => x.Description)
                )
            );
            page.OnItemSelected += (o,e) =>
            {

                var area = e.Row.ToObject<StockArea>();
                if (_areaid != area.ID)
                {
                    _warehouseid = area.Warehouse.ID;
                    _warehousename = area.Warehouse.Description;
                    _areaid = area.ID;
                    _areaname = area.Description;
                    _locationid = Guid.Empty;
                    _locationname = "Select Location";
                }
            };
            Navigation.PushAsync(page);
        }

        void Location_Clicked(System.Object sender, System.EventArgs e)
        {
            Filter<StockLocation> filter = new Filter<StockLocation>(X => X.Active).IsEqualTo(true);
            if (_warehouseid != Guid.Empty)
                filter = filter.And(x => x.Warehouse.ID).IsEqualTo(_warehouseid);
            if (_areaid != Guid.Empty)
                filter = filter.And(x => x.Area.ID).IsEqualTo(_areaid);

            GenericSelectionPage page = new GenericSelectionPage(
                "Select Location",
                    new SelectionViewModel<StockLocation>(
                    filter,
                    new Expression<Func<StockLocation, object>>[] { x => x.Code, X => X.Description },
                    new Expression<Func<StockLocation, object>>[] { x => x.Area.Warehouse.ID, x => x.Area.Warehouse.Description, x => x.Area.ID, x => x.Area.Description,
                    x => x.Job.ID, x => x.Job.JobNumber, x => x.Job.Name},
                    new SortOrder<StockLocation>(x => x.Description)
                )
            );
            page.OnItemSelected += (o,e) =>
            {

                var location = e.Row.ToObject<StockLocation>();
                if (_locationid != location.ID)
                {
                    _warehouseid = location.Area.Warehouse.ID;
                    _warehousename = location.Area.Warehouse.Description;
                    _areaid = location.Area.ID;
                    _areaname = location.Area.Description;
                    _locationid = location.ID;
                    _locationname = location.Description;
                    job.ID = location.Job.ID;
                    job.JobNumber = location.Job.JobNumber;
                    job.Name = location.Job.Name;
                }
            };
            Navigation.PushAsync(page);
        }
        #endregion

        #region Scanner
        void Scan_Clicked(System.Object sender, System.EventArgs e)
        {
            _scannerpage = new ScannerPage();
            _scannerpage.ItemScanned = async (args) => OnScan(args);
            Navigation.PushModalAsync(_scannerpage);
        }

        private async void OnScan(ScannerPageItemScannedArgs args)
        {
            if (Guid.TryParse(args.Text, out Guid id))
            {
                CoreTable result = new Client<StockLocation>().Query(
                    new Filter<StockLocation>(X => X.ID).IsEqualTo(id),
                    new Columns<StockLocation>(
                        x => x.Warehouse.ID,
                        X => X.Warehouse.Description,
                        X => X.Area.ID,
                        X => X.Area.Description,
                        x => x.ID,
                        X => X.Description,
                        x => x.Type
                    )
                );
                if (result.Rows.Any())
                {
                    CoreRow r = result.Rows.First();
                    _warehouseid = r.Get<StockLocation, Guid>(c => c.Warehouse.ID);
                    _warehousename = r.Get<StockLocation, String>(c => c.Warehouse.Description);
                    _areaid = r.Get<StockLocation, Guid>(c => c.Area.ID);
                    _areaname = r.Get<StockLocation, String>(c => c.Area.Description);
                    _locationid = r.Get<StockLocation, Guid>(c => c.ID);
                    _locationname = r.Get<StockLocation, String>(c => c.Description);
                    _istransient = r.Get<StockLocation, StockLocationType>(x => x.Type) == StockLocationType.Transient;
                }
            }
        }
        
        #endregion

        #region Holding Page Load Types
        async void LoadHoldingPage(StockMovementBatchType type)
        {
            if (_locationid == Guid.Empty)
                return;

            var progress = await MaterialDialog.Instance.LoadingDialogAsync(message: "Loading Stock Holding");
            _holdingpage = new StockHoldingPage(_locationid, _locationname, _istransient, type, job);
            await progress.DismissAsync();

            await Navigation.PushAsync(_holdingpage);
        }

        async void ReceiveTapped(System.Object sender, System.EventArgs e)
        {
            LoadHoldingPage(StockMovementBatchType.Receipt);
        }

        async void StockTakeTapped(System.Object sender, System.EventArgs e)
        {
            LoadHoldingPage(StockMovementBatchType.Stocktake);
        }

        async void IssueTapped(System.Object sender, System.EventArgs e)
        {
            LoadHoldingPage(StockMovementBatchType.Issue);
        }

        async void TransferTapped(System.Object sender, System.EventArgs e)
        {
            LoadHoldingPage(StockMovementBatchType.Transfer);
        }
        #endregion

        #region Warehouse/Area/Location Clear buttons
        void Warehouse_Clear_Clicked(System.Object sender, System.EventArgs e)
        {
            _warehouseid = Guid.Empty;
            _warehousename = "Select Warehouse";
            _areaid = Guid.Empty;
            _areaname = "Select Area";
            _locationid = Guid.Empty;
            _locationname = "Select Location";
            UpdateScreen();
        }

        void Area_Clear_Clicked(System.Object sender, System.EventArgs e)
        {
            _areaid = Guid.Empty;
            _areaname = "Select Area";
            _locationid = Guid.Empty;
            _locationname = "Select Location";
            UpdateScreen();
        }

        void Location_Clear_Clicked(System.Object sender, System.EventArgs e)
        {
            _locationid = Guid.Empty;
            _locationname = "Select Location";
            UpdateScreen();
        }
        #endregion

        #region Change/new Stock Location
        void NewLocationClicked(System.Object sender, System.EventArgs e)
        {
            StockLocation location = new StockLocation();
            location.Active = true;
            location.Warehouse.ID = _warehouseid;
            location.Warehouse.Description = _warehousename;
            location.Area.Warehouse.ID = _warehouseid;
            location.Area.Warehouse.Description = _warehousename;
            location.Area.ID = _areaid;
            location.Area.Description = _areaname;

            LocationDetailsPage page = new LocationDetailsPage(location);

            page.OnSave += (o, loc) =>
            {

                if (String.IsNullOrWhiteSpace(loc.Code))
                {
                    MaterialDialog.Instance.AlertAsync(message: "Code may not be blank!");
                    return false;
                }

                if (String.IsNullOrWhiteSpace(loc.Description))
                {
                    MaterialDialog.Instance.AlertAsync(message: "Description may not be blank!");
                    return false;
                }

                if (loc.Area.ID == Guid.Empty)
                {
                    MaterialDialog.Instance.AlertAsync(message: "Area may not be blank!");
                    return false;
                }

                CoreTable others = new Client<StockLocation>().Query(
                    new Filter<StockLocation>(x => x.Code).IsEqualTo(loc.Code).And(x => x.ID).IsNotEqualTo(loc.ID),
                    new Columns<StockLocation>(x => x.ID)
                );
                if (others.Rows.Any())
                {
                    MaterialDialog.Instance.AlertAsync(message: "Location Code already exists!");
                    return false;
                }

                try
                {
                    new Client<StockLocation>().Save(loc, "Created Location");
                }
                catch (Exception err)
                {
                    MaterialDialog.Instance.AlertAsync(message: "Unable to save Location\n" + err.Message);
                    return false;
                }
                _warehouseid = loc.Area.Warehouse.ID;
                _warehousename = loc.Area.Warehouse.Description;
                _areaid = loc.Area.ID;
                _areaname = loc.Area.Description;
                _locationid = loc.ID;
                _locationname = loc.Description;
                try
                {
                    job.ID = loc.Job.ID;
                    job.JobNumber = loc.Job.JobNumber;
                    job.Name = loc.Job.Name;
                }
                catch { }
                return true;
            };

            Navigation.PushAsync(page);
        }

        void MoveLocation(System.Object sender, System.EventArgs e)
        {
            if (_locationid == Guid.Empty)
                return;

            Filter<StockArea> areafilter = new Filter<StockArea>(X => X.Active).IsEqualTo(true);

            GenericSelectionPage page = new GenericSelectionPage(
                "Move Stock Location to:",
                    new SelectionViewModel<StockArea>(
                    areafilter,
                    new Expression<Func<StockArea, object>>[] { X => X.Description },
                    new Expression<Func<StockArea, object>>[] { x => x.Warehouse.ID, x => x.Warehouse.Description },
                    new SortOrder<StockArea>(x => x.Description)
                )
            );
            page.OnItemSelected += async (o,e) =>
            {

                var area = e.Row.ToObject<StockArea>();
                if (_areaid != area.ID)
                {
                    string chosenOption = await DisplayActionSheet("Change this Location Area?", "Cancel", null, "Yes", "No");
                    switch (chosenOption)
                    {
                        case "No":
                            break;
                        case "Cancel":
                            break;
                        case "Yes":
                            StockLocation location = new StockLocation();
                            location.ID = _locationid;
                            location.Area.ID = area.ID;
                            location.Warehouse.ID = area.Warehouse.ID;
                            new Client<StockLocation>().Save(location, "Updated Stock Area", (o, err) => { });
                            _warehouseid = area.Warehouse.ID;
                            _warehousename = area.Warehouse.Description;
                            _areaid = area.ID;
                            _areaname = area.Description;
                            UpdateScreen();
                            break;

                        default:
                            break;
                    }
                }
            };
            Navigation.PushAsync(page);
        }
        #endregion

        void Find_Clicked(object sender, EventArgs e)
        {
            if (loadedFromProducts)
            {
                Navigation.PopAsync();
            }
            else
            {
                if (App.Data.Products.Loaded)
                {
                    ProductList2 products = new ProductList2();
                    products.OnExitSelected += () => 
                    {
                        Navigation.PopAsync();
                    };
                    Navigation.PushAsync(products);
                }
                else
                {
                    ProductList2 products = new ProductList2();
                    products.OnExitSelected += () =>
                    {
                        Navigation.PopAsync();
                    };
                    Navigation.PushAsync(products);
                }
            }

        }

        //being replaced
        //void Find_Clicked(System.Object sender, System.EventArgs e)
        //{

        //    GenericSelectionPage products = new GenericSelectionPage(
        //        "Select Product",
        //        new SelectionViewModel<Product>(
        //            new Filter<Product>(X => X.Expired).IsEqualTo(DateTime.MinValue),
        //            new Expression<Func<Product, object>>[] { X => X.Code, X => X.Name },
        //            new Expression<Func<Product, object>>[] { },
        //            new SortOrder<Product>(x => x.Code)
        //        )
        //    );
        //    products.AutoClose = false;
        //    products.OnItemSelected += (p) =>
        //    {

        //        var product = p.ToObject<Product>();
        //        GenericSelectionPage holdings = new GenericSelectionPage(
        //            "Select Stock Holding",
        //            new SelectionViewModel<StockHolding>(
        //                new Filter<StockHolding>(X => X.Product.ID).IsEqualTo(product.ID),
        //                new Expression<Func<StockHolding, object>>[] { },
        //                new Expression<Func<StockHolding, object>>[] {
        //                    X => X.Location.Area.Warehouse.ID,
        //                    x=>x.Location.Area.Warehouse.Code,
        //                    x=>x.Location.Area.Warehouse.Description,
        //                    x => x.Location.Area.ID,
        //                    x=>x.Location.Area.Code,
        //                    x=>x.Location.Area.Description,
        //                    x => x.Location.ID,
        //                    x=>x.Location.Code,
        //                    x=>x.Location.Description,
        //                    x=>x.Style.Code,
        //                    x=>x.Units
        //                },
        //                new SortOrder<StockHolding>(x => x.Location.Area.Warehouse.Code).ThenBy(x=>x.Location.Area.Code).ThenBy(x=>x.Location.Code),
        //                (r) => String.Format("{0} {1}: {2} ({3} {4})",
        //                    r.Get<StockHolding, String>(x => x.Location.Area.Warehouse.Code),
        //                    r.Get<StockHolding, String>(x => x.Location.Area.Code),
        //                    r.Get<StockHolding, String>(x => x.Location.Code),
        //                    r.Get<StockHolding, double>(x => x.Units),
        //                    r.Get<StockHolding, String>(x => x.Style.Code)
        //                )
        //            )
        //        );
        //        holdings.OnItemSelected += (h) =>
        //        {

        //            var holding = h.ToObject<StockHolding>();
        //            _warehouseid = holding.Location.Area.Warehouse.ID;
        //            _warehousename = holding.Location.Area.Warehouse.Description;
        //            _areaid = holding.Location.Area.ID;
        //            _areaname = holding.Location.Area.Description;
        //            _locationid = holding.Location.ID;
        //            _locationname = holding.Location.Description;

        //            // Close the Product Page as well :=)
        //            Navigation.PopAsync();

        //        };
        //        Navigation.PushAsync(holdings);

        //    };
        //    Navigation.PushAsync(products);
        //}
    }
}