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 comal.timesheets.Products;
using System.Threading.Tasks;
using Xamarin.Forms.Xaml;

namespace comal.timesheets
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class RelocatePage : BasePage
    {
        Guid _warehouseid = Guid.Empty;
        String _warehousename = "Select Warehouse";
        Guid _areaid = Guid.Empty;
        String _areaname = "Select Area / Rack";
        Guid _locationid = Guid.Empty;
        String _locationname = "Select Location / Pack";
        Job job = new Job();

        public RelocatePage()
        {
            InitializeComponent();
        }

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

        private void Relocate_Clicked(object sender, 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 (row) =>
            {
                var area = row.ToObject<StockArea>();
                if (_areaid != area.ID)
                {
                    string chosenOption = await DisplayActionSheet("Change this Location's 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();

                            await warehouseBtn.TranslateTo(0, -15, 150);
                            await warehouseBtn.TranslateTo(0, 0, 150);

                            await areaBtn.TranslateTo(0, -15, 150);
                            await areaBtn.TranslateTo(0, 0, 150);

                            await locationBtn.TranslateTo(0, -15, 150);
                            await locationBtn.TranslateTo(0, 0, 150);

                            break;

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

        #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 += (row) =>
            {
                var warehouse = 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 += (row) =>
            {

                var area = 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 += (row) =>
            {

                var location = 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 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

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

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

            locationBtn.Text = _locationname;
            locationBtn.SetValue(Grid.ColumnSpanProperty, _locationid != Guid.Empty ? 2 : 3);
            locationBtn.Margin = new Thickness(10, 0, _locationid == Guid.Empty ? 5 : 0, 0);

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