using System;
using System.Linq;
using InABox.Core;
using InABox.Mobile;
using Xamarin.Forms.Xaml;
using ZXing;

namespace PRS.Mobile
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class RequisitionEditItemsView : RequisitionEditView
    {
        public RequisitionEditItemsView()
        {
            InitializeComponent();
        }

        public override void Refresh()
        {
            
        }

        private void Complete_Clicked(object sender, MobileButtonClickEventArgs args)
        {
            DoChanged(nameof(RequisitionShell.Filled));
        }

        private void ScanView_OnScanResult(ZXing.Result result)
        {

        }

        public void AddItem()
        {
            if (ViewModel.Mode == RequisitionEditMode.PickStock)
                AddScannerItems();
            else
                AddSiteItems();
        }
        
        private void RequisitionItem_Clicked(object sender, EventArgs e)
        {
            if ((sender as MobileCard)?.BindingContext is RequisitionItemShell item)
            {
                if (ViewModel.Mode == RequisitionEditMode.PickStock)
                    EditScannerItem(item);
                else
                    EditSiteItem(item);
            }
        }
        
        private void EditScannerItem(RequisitionItemShell item)
        {
            var editor = new RequisitionItemScanner(item);
            editor.OnSave += (sender, args) =>
            {
                SaveScannerItem(item, args);
                item.Save("Updated on Mobile Device");
            };
            Navigation.PushAsync(editor);
        }

        private void AddScannerItems()
        {
            var editor = new RequisitionItemScanner(null);
            editor.OnSave += (sender, args) =>
            {
                var item = ViewModel.Items.AddItem();
                item.RequisitionID = ViewModel.Item.ID;
                item.RequisitionJobID = ViewModel.Item.JobID;
                SaveScannerItem(item, args);
                item.Save("Created on Mobile Device");
            };
            Navigation.PushAsync(editor);
        }

        private static void SaveScannerItem(RequisitionItemShell item, RequisitionItemScannerSaveArgs args)
        {
            item.ProductID = args.Holding.ProductID;
            item.ProductCode = args.Holding.ProductCode;
            item.ProductName = args.Holding.ProductName;
            item.StyleID = args.Holding.StyleID;
            item.StyleCode = args.Holding.StyleCode;
            item.StyleDescription = args.Holding.StyleDescription;
            item.DimensionsUnitID = args.Holding.DimensionsUnitID;
            item.DimensionsHeight = args.Holding.DimensionsHeight;
            item.DimensionsLength = args.Holding.DimensionsLength;
            item.DimensionsWidth = args.Holding.DimensionsWidth;
            item.DimensionsWeight = args.Holding.DimensionsWeight;
            item.DimensionsQuantity = args.Holding.DimensionsQuantity;
            item.DimensionsValue = args.Holding.DimensionsValue;
            item.DimensionsUnitSize = args.Holding.DimensionsUnitSize;
            item.TargetJRI = args.JobRequisitionItemID;
            item.LocationID = args.Holding.LocationID;
            item.ActualQuantity = args.Quantity;
        }


        private void AddSiteItems()
        {
            var editor = new RequisitionItemEditor(null);
            editor.Saving += (sender, args) =>
            {
                var item = ViewModel.Items.AddItem();
                item.RequisitionID = ViewModel.Item.ID;
                item.RequisitionJobID = ViewModel.Item.JobID;
                SaveSiteItem(item,args);
            };
            Navigation.PushAsync(editor);
        }
        
        private void EditSiteItem(RequisitionItemShell item)
        {
            var editor = new RequisitionItemEditor(item);
            editor.Saving += (sender, args) =>
            {
                SaveSiteItem(item,args);
            };
            Navigation.PushAsync(editor);
        }

        private void SaveSiteItem(RequisitionItemShell item, RequisitionItemEditorSaveArgs args)
        {
            if (args.Product != null)
            {
                item.ProductID = args.Product.ID;
                item.ProductCode = args.Product.Code;
                item.ProductName = args.Product.Name;
                item.StyleID = args.Product.DefaultStyleID;
                item.StyleCode = args.Product.DefaultStyleCode;
                item.StyleDescription = args.Product.DefaultStyleDescription;
                item.DimensionsUnitID = args.Product.DimensionsUnitID;
                item.DimensionsHeight = args.Product.DimensionsHeight;
                item.DimensionsLength = args.Product.DimensionsLength;
                item.DimensionsWidth = args.Product.DimensionsWidth;
                item.DimensionsWeight = args.Product.DimensionsWeight;
                item.DimensionsQuantity = args.Product.DimensionsQuantity;
                item.DimensionsValue = args.Product.DimensionsValue;
                item.DimensionsUnitSize = args.Product.DimensionsUnitSize;
                if (args.Product.ImageID != Guid.Empty)
                {
                    item.ImageID = args.Product.ImageID;
                    if (item.ImageID != Guid.Empty)
                       ViewModel.Items.Images[item.ImageID] = args.Image;
                }
                else
                    item.ImageID = SaveRequisitionImage(args);
            }
            else
            {
                item.ProductID = Guid.Empty;
                item.ProductCode = "";
                item.ProductName = "";
                item.StyleID = Guid.Empty;
                item.StyleCode = "";
                item.StyleDescription = "";
                item.DimensionsUnitID = Guid.Empty;
                item.DimensionsHeight = 0.0F;
                item.DimensionsLength = 0.0F;
                item.DimensionsWidth = 0.0F;
                item.DimensionsWeight = 0.0F;
                item.DimensionsQuantity = 0.0F;
                item.DimensionsValue = 0.0F;
                item.DimensionsUnitSize = "";
                item.ImageID = SaveRequisitionImage(args);
            }

            item.Description = args.Description ?? string.Empty;

            item.Quantity = args.Quantity;
            
            item.Save("Created on Mobile Device");
            ViewModel.Items.Refresh(false);
        }

        private Guid SaveRequisitionImage(RequisitionItemEditorSaveArgs args)
        {
            if ((args.ImageID == Guid.Empty) && (args.Image?.Any() == true))
            {
                var docmodel = new DocumentModel(App.Data, () => new Filter<Document>().None());
                docmodel.Refresh(true);
                var doc = docmodel.AddItem();
                doc.Data = args.Image;
                doc.FileName = $"Requisition Item{DateTime.Now:yyyy-MM-dd-hh-mm-ss.zzz}.jpg";
                doc.CRC = CoreUtils.CalculateCRC(args.Image);
                doc.TimeStamp = DateTime.Now;
                doc.Save("Created on Mobile Device");
                ViewModel.Items.Images[doc.ID] = args.Image;
                return doc.ID;
            }
            return args.ImageID;
        }
    }
}