using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;

namespace PRSDesktop
{
    public class JobBillOfMaterialsItemGrid : DynamicDataGrid<JobBillOfMaterialsItem>
    {
        Guid empID = Guid.Empty;
        string empName = "";
        public JobBillOfMaterialsItemGrid()
        {
            Options.AddRange(
                DynamicGridOption.RecordCount,
                DynamicGridOption.SelectColumns,
                DynamicGridOption.AddRows,
                DynamicGridOption.ExportData,
                DynamicGridOption.FilterRows,
                DynamicGridOption.MultiSelect,
                DynamicGridOption.EditRows,
                DynamicGridOption.DeleteRows
            );
            HiddenColumns.Add(x => x.Dimensions.Unit.ID);
            HiddenColumns.Add(x => x.Dimensions.Unit.Format);
            HiddenColumns.Add(x => x.Dimensions.Unit.Formula);
            HiddenColumns.Add(x => x.Dimensions.Unit.HasLength);
            HiddenColumns.Add(x => x.Dimensions.Unit.HasWidth);
            HiddenColumns.Add(x => x.Dimensions.Unit.HasWeight);
            HiddenColumns.Add(x => x.Dimensions.Unit.HasHeight);
            HiddenColumns.Add(x => x.Dimensions.Unit.HasQuantity);
            HiddenColumns.Add(x => x.Dimensions.Length);
            HiddenColumns.Add(x => x.Dimensions.Width);
            HiddenColumns.Add(x => x.Dimensions.Height);
            HiddenColumns.Add(x => x.Dimensions.Weight);
            HiddenColumns.Add(x => x.Dimensions.Quantity);
            HiddenColumns.Add(x => x.Dimensions.UnitSize);
            HiddenColumns.Add(x => x.Dimensions.Value);
            HiddenColumns.Add(x => x.Product.ID);
            HiddenColumns.Add(x => x.Product.Code);
            HiddenColumns.Add(x => x.Product.Name);
            HiddenColumns.Add(x => x.Style.ID);
            HiddenColumns.Add(x => x.Style.Code);
            HiddenColumns.Add(x => x.Style.Description);
            HiddenColumns.Add(x => x.BillOfMaterials.ID);
            HiddenColumns.Add(x => x.Job.ID);
            HiddenColumns.Add(x => x.PurchaseOrderItem.ID);
            HiddenColumns.Add(x => x.PurchaseOrderItem.PurchaseOrderLink.PONumber);
            HiddenColumns.Add(x => x.PurchaseOrderItem.ReceivedDate);
            HiddenColumns.Add(x => x.PurchaseOrderItem.PONumber);

            AddButton("Create Requi", null, CreateRequi);
            AddButton("Create PO", null, CreatePO);

            GetEmpID();
        }        

        private bool CreateRequi(System.Windows.Controls.Button btn, CoreRow[] rows)
        {
            if (!rows.Any())
            {
                MessageBox.Show("Please select at least one row to add to Requi");
                return false;
            }

            JobRequisition jobRequi = new JobRequisition();
            jobRequi.Job.ID = JobID;
            jobRequi.Description = "New Requisition";

            var page = new JobRequisitionGrid();
            page.OnAfterSave += (form, items) => { MessageBox.Show("Success - Job Requisition Raised."); };
            return page.EditItems(new[] { jobRequi }, LoadJobRequiItems, true);
        }

        private CoreTable LoadJobRequiItems(Type arg)
        {
            Progress.Show("Working");
            var result = new CoreTable();
            result.LoadColumns(typeof(JobRequisitionItem));
            List<JobRequisitionItem> requiItems = new List<JobRequisitionItem>();
            foreach (CoreRow row in SelectedRows)
            {
                JobBillOfMaterialsItem BOMitem = row.ToObject<JobBillOfMaterialsItem>();
                JobRequisitionItem requiItem = new JobRequisitionItem();
                requiItem.Qty = BOMitem.Quantity;
                requiItem.Product.ID = BOMitem.Product.ID;
                requiItem.Product.Code = BOMitem.Product.Code;
                requiItem.Product.Name = BOMitem.Product.Name;
                requiItem.Style.ID = BOMitem.Style.ID;
                requiItem.Style.Code = BOMitem.Style.Code;
                requiItem.Style.Description = BOMitem.Style.Description;
                requiItem.Supplier.ID = BOMitem.Supplier.ID;
                requiItem.Supplier.Code = BOMitem.Supplier.Code;
                requiItem.Supplier.Name = BOMitem.Supplier.Name;
                requiItem.Dimensions.CopyFrom(BOMitem.Dimensions);
                requiItem.Job.ID = JobID;
                requiItems.Add(requiItem);
            }
            result.LoadRows(requiItems);
            Progress.Close();
            return result;
        }

        public Guid JobID { get; set; }

        public Guid BillOfMaterialsID { get; set; }

        public event DataModelUpdateEvent OnUpdateDataModel;

        protected override void DoAdd(bool OpenEditorOnDirectEdit = false)
        {
            if (BillOfMaterialsID.Equals(Guid.Empty) || BillOfMaterialsID.Equals(CoreUtils.FullGuid))
                MessageBox.Show("Please select a Bill Of Materials first!");
            else
                base.DoAdd();
        }

        protected override JobBillOfMaterialsItem CreateItem()
        {
            var result = base.CreateItem();
            result.BillOfMaterials.ID = BillOfMaterialsID;
            result.Job.ID = JobID;
            return result;
        }

        protected override void Reload(Filters<JobBillOfMaterialsItem> criteria, Columns<JobBillOfMaterialsItem> columns,
            ref SortOrder<JobBillOfMaterialsItem> sort, Action<CoreTable, Exception> action)
        {
            criteria.Add(new Filter<JobBillOfMaterialsItem>(x => x.BillOfMaterials.ID).IsEqualTo(BillOfMaterialsID));
            base.Reload(criteria, columns, ref sort, action);
        }

        #region Create PO
        private void GetEmpID()
        {
            CoreTable table = new Client<Employee>().Query(new Filter<Employee>(x => x.UserLink.UserID).IsEqualTo(ClientFactory.UserID), new Columns<Employee>(x => x.ID, x => x.Name));
            if (table.Rows.Any())
            {
                empID = Guid.Parse(table.Rows.FirstOrDefault().Values[0].ToString());
                empName = table.Rows.FirstOrDefault().Values[1].ToString();
            }
        }

        private bool CreatePO(System.Windows.Controls.Button btn, CoreRow[] rows)
        {
            if (!rows.Any())
            {
                MessageBox.Show("Please select at least one row to add to PO");
                return false;
            }
            PurchaseOrder purchaseOrder = new PurchaseOrder();
            purchaseOrder.Notes = "Created from Job BOM Review Screen" + System.Environment.NewLine;
            purchaseOrder.RaisedBy.ID = empID;
            var page = new SupplierPurchaseOrders();
            page.OnAfterSave += (form, items) =>
            {
                PurchaseOrderOnSave(form, items.Cast<PurchaseOrder>().ToArray());
                MessageBox.Show("Success - New Purchase Order Created (" + purchaseOrder.PONumber + ")");
            };
            return page.EditItems(new[] { purchaseOrder }, LoadPurchaseOrderItems, true);
        }

        private void PurchaseOrderOnSave(IDynamicEditorForm form, PurchaseOrder[] items)
        {
            Progress.Show("Working");

            Guid POID = items[0].ID;

            CoreTable table = new Client<PurchaseOrderItem>().Query(new Filter<PurchaseOrderItem>(x => x.PurchaseOrderLink.ID).IsEqualTo(POID),
                new Columns<PurchaseOrderItem>(x => x.ID, x => x.Product.ID, x => x.Qty, x => x.Dimensions.UnitSize, x => x.DueDate, x => x.Job.ID));

            if (table.Rows.Any())
            {
                var poItems = AddPOItems(table, new List<PurchaseOrderItem>());

                var BOMItems = MatchBOMItems(poItems, new List<JobBillOfMaterialsItem>());

                if (BOMItems.Count > 0)
                    SaveAndRefreshScreen(BOMItems);
            }
            Progress.Close();
        }

        private void SaveAndRefreshScreen(List<JobBillOfMaterialsItem> bomItems)
        {
            new Client<JobBillOfMaterialsItem>().Save(bomItems, "Updated on Create Purchase Order from BOM Dashboard");
            Dispatcher.BeginInvoke(() =>
            {
                Refresh(false, true);
            });
        }

        private List<PurchaseOrderItem> AddPOItems(CoreTable table, List<PurchaseOrderItem> poItems)
        {
            foreach (CoreRow row in table.Rows)
            {
                PurchaseOrderItem poItem = row.ToObject<PurchaseOrderItem>();
                poItems.Add(poItem);
            }
            return poItems;
        }

        private List<JobBillOfMaterialsItem> MatchBOMItems(List<PurchaseOrderItem> poItems, List<JobBillOfMaterialsItem> bomItems)
        {
            foreach (CoreRow row in SelectedRows)
            {
                JobBillOfMaterialsItem bomItem = row.ToObject<JobBillOfMaterialsItem>();
                foreach (var item in poItems)
                {
                    if (string.IsNullOrWhiteSpace(bomItem.Dimensions.UnitSize))
                        bomItem.Dimensions.UnitSize = QueryUnitSize(bomItem.Product.ID);

                    if (string.IsNullOrWhiteSpace(item.Dimensions.UnitSize))
                        item.Dimensions.UnitSize = QueryUnitSize(item.Product.ID);

                    if (bomItem.Job.ID == Guid.Empty)
                        bomItem.Job.ID = QueryJobID(bomItem.BillOfMaterials.ID);

                    if (item.Job.ID == Guid.Empty)
                        item.Job.ID = QueryJobID(bomItem.BillOfMaterials.ID);

                    if (MatchBOMItemToPOItem(bomItem, item))
                        bomItems.Add(UpdateBOMItemWithPODetails(bomItem, item));
                }
            }
            return bomItems;
        }

        private JobBillOfMaterialsItem UpdateBOMItemWithPODetails(JobBillOfMaterialsItem bomItem, PurchaseOrderItem item)
        {
            bomItem.PurchaseOrderItem.ID = item.ID;
            bomItem.PurchaseOrderItem.DueDate = item.DueDate;
            return bomItem;
        }

        private string QueryUnitSize(Guid productID)
        {
            CoreTable table = new Client<Product>().Query(new Filter<Product>(x => x.ID).IsEqualTo(productID),
                new Columns<Product>(x => x.Dimensions.UnitSize));
            return table.Rows.FirstOrDefault().Get<string>("Dimensions.UnitSize");
        }

        private Guid QueryJobID(Guid iD)
        {
            CoreTable table = new Client<JobBillOfMaterials>().Query(new Filter<JobBillOfMaterials>(x => x.ID).IsEqualTo(iD),
                new Columns<JobBillOfMaterials>(x => x.Job.ID));
            return table.Rows.FirstOrDefault().Get<JobBillOfMaterials, Guid>(x => x.Job.ID);
        }

        private bool MatchBOMItemToPOItem(JobBillOfMaterialsItem bomItem, PurchaseOrderItem item)
        {
            if (bomItem.Product.ID == item.Product.ID &&
                                bomItem.Dimensions.UnitSize == item.Dimensions.UnitSize &&
                                bomItem.Job.ID == item.Job.ID)
                return true;
            else
                return false;
        }

        private CoreTable LoadPurchaseOrderItems(Type arg)
        {
            Progress.Show("Working");
            var result = new CoreTable();
            result.LoadColumns(typeof(PurchaseOrderItem));
            List<PurchaseOrderItem> items = new List<PurchaseOrderItem>();
            foreach (CoreRow row in SelectedRows)
            {
                JobBillOfMaterialsItem BOMItem = row.ToObject<JobBillOfMaterialsItem>();
                PurchaseOrderItem POItem = new PurchaseOrderItem();
                POItem.Product.ID = BOMItem.Product.ID;
                POItem.Product.Code = BOMItem.Product.Code;
                POItem.Product.Name = BOMItem.Product.Name;
                POItem.Description = BOMItem.Product.Name;
                POItem.Qty = BOMItem.Quantity;
                POItem.Dimensions.CopyFrom(BOMItem.Dimensions);
                POItem.Style.ID = BOMItem.Style.ID;
                POItem.Style.Code = BOMItem.Style.Code;
                POItem.Style.Description = BOMItem.Style.Description;
                POItem.Job.ID = BOMItem.Job.ID;
                POItem.Dimensions.UnitSize = BOMItem.Dimensions.UnitSize;
                items.Add(POItem);
            }
            result.LoadRows(items);
            Progress.Close();
            return result;
        }

        #endregion
    }
}