using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Tanshu.Accounts.BI;
using Tanshu.Accounts.Helpers;
using Tanshu.Accounts.Contracts;
using System.Windows.Forms;
using Tanshu.Common;

namespace Tanshu.Accounts.PointOfSale
{
    public class BillController
    {
        private SaleVoucherBO billInfo;
        private Dictionary<BillItemKey, SalesBillItemBO> bill = new Dictionary<BillItemKey, SalesBillItemBO>();
        Guid? newBillID;

        ISaleForm saleForm;
        private CustomerBO customer = new CustomerBI().GetCustomer(new Guid("F016CBAD-206C-42C0-BB1D-6006CE57BAB5"));
        public void InitGui(ISaleForm saleForm)
        {
            this.saleForm = saleForm;
            this.saleForm.SetCustomerDisplay(customer.Name);
            this.saleForm.SetUserName(Session.User.Name);

        }
        private void InitComponents()
        {
            InitModel();
            InitView();
        }

        private void InitView()
        {
            throw new NotImplementedException();
        }

        private void InitModel()
        {
            throw new NotImplementedException();
        }
        public void AddProductToGrid(Guid productID, BindingSource bindingSource)
        {
            BillHelperFunctions.AddProductToGrid(productID, bindingSource, bill);
            ShowAmount();
        }
        public void ShowCustomerList(bool reset)
        {
            if ((customer.CustomerID == new Guid("F016CBAD-206C-42C0-BB1D-6006CE57BAB5")) && (!reset))
            {
                using (SelectCustomer selectCustomer = new SelectCustomer(new CustomerBI().GetFilteredCustomers, true))
                {
                    selectCustomer.customerEvent += new CustomerEventHandler(selectCustomer_customerEvent);
                    selectCustomer.ShowDialog();
                    if (selectCustomer.SelectedItem != null)
                    {
                        customer = selectCustomer.SelectedItem;
                        saleForm.SetCustomerDisplay(customer.Name);
                    }
                    else
                    {
                        customer = new CustomerBI().GetCustomer(new Guid("F016CBAD-206C-42C0-BB1D-6006CE57BAB5"));
                    }
                }
            }
            else
            {
                customer = new CustomerBI().GetCustomer(new Guid("F016CBAD-206C-42C0-BB1D-6006CE57BAB5"));
                saleForm.SetCustomerDisplay(customer.Name);
            }
        }

        #region Save
        //    if (btnWaiter.Tag == null)
        //btnWaiter.Tag = new WaiterBI().GetWaiters()[0].WaiterID;

        public void Save(bool print, Guid waiterID, string tableID)
        {
            using (RoleBI roleBI = RoleFactoryBI.GetRoleBI(Roles.SALES_EDIT_BILL))
            {
                if ((billInfo != null) && (new SaleVoucherBI().IsBillPrinted(billInfo.VoucherID)) && (!roleBI.IsAllowed))
                {
                    throw new PermissionException("You do not have the permission to reprint a bill.");
                }
            }
            if (bill.Count != 0)
            {
                Guid? saved;
                if (billInfo == null)
                    saved = AddNewSale(print, waiterID, tableID);
                else
                    saved = UpdateSale(print, waiterID, tableID);
                if (saved.HasValue)
                {
                    if (newBillID.HasValue)
                        saleForm.CloseWindow();
                    else
                        PrintBill(print, saved.Value);
                }
                ClearBill();
            }
        }
        private Guid? AddNewSale(bool finalBill, Guid waiterID, string tableID)
        {
            if (billInfo != null)
            {
                MessageBox.Show("Error in AddNewSale, there is a previous sale in memory", "Error");
                return null;
            }


            #region SaleVoucher
            UserBO user = Session.User;
            SaleVoucherBO saleVoucher = new SaleVoucherBO
            {
                CustomerID = customer.CustomerID,
                Paid = false,
                //Paid = finalBill,
                TableID = tableID,
                WaiterID = waiterID,
                Printed = finalBill,
                Void = false,
                Date = DateTime.Now,
                Narration = "",
                Ref = "",
                Type = 'S',
                UserID = user.UserID
            };
            #endregion
            #region Inventories
            List<InventoryBO> iList = new SaleVoucherBI().SaleInventory(bill.Values, null);
            #endregion
            new SaleVoucherBI().Insert(saleVoucher, iList);
            return saleVoucher.VoucherID;

        }
        private Guid? UpdateSale(bool finalBill, Guid waiterID, string tableID)
        {
            UserBO user = Session.User;
            #region Voucher and SaleVoucher
            SaleVoucherBO saleVoucher = new SaleVoucherBO
            {
                VoucherID = billInfo.VoucherID,
                timestamp = (byte[])billInfo.timestamp,
                UserID = billInfo.UserID,
                Date = billInfo.Date,
                CreationDate = DateTime.Now,
                LastEditDate = DateTime.Now,
                Narration = billInfo.Narration,
                Ref = "",
                Type = 'S',
                Alarm = billInfo.Alarm,
                BillID = billInfo.BillID,
                CustomerID = customer.CustomerID,
                KotID = billInfo.KotID,
                Paid = billInfo.Paid,
                Printed = billInfo.Printed || finalBill,
                TableID = tableID,
                Void = billInfo.Void,
                VoidReason = billInfo.VoidReason,
                WaiterID = waiterID,
                SaleTimestamp = (byte[])billInfo.SaleTimestamp
            };
            if ((!billInfo.Printed) && finalBill)
                saleVoucher.Date = null;
            #endregion
            #region Inventory
            List<InventoryBO> iList = new SaleVoucherBI().SaleInventory(bill.Values, billInfo.VoucherID);
            #endregion
            new SaleVoucherBI().Update(saleVoucher, iList);
            return saleVoucher.VoucherID;
        }
        #endregion
        public void VoidBill()
        {
            if (billInfo != null)
            {
                if (billInfo.Printed)
                {
                    using (RoleBI roleBI = RoleFactoryBI.GetRoleBI(Roles.SALES_VOID_BILL))
                    {
                        if (roleBI.IsAllowed)
                        {

                            if (MessageBox.Show("Are you sure you want to void this bill?", "Void Bill", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.Yes)
                            {
                                SelectVoidReason voidReason = new SelectVoidReason(GetVoidReason, true);
                                voidReason.ShowDialog();
                                if (voidReason.SelectedItem != null)
                                {
                                    new SaleVoucherBI().VoidBill(billInfo.VoucherID, voidReason.SelectedItem.Description);
                                    ClearBill();
                                }
                                else
                                {
                                    MessageBox.Show("Please Select a reason if you want to void the bill", "Bill NOT Voided", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                                }
                            }
                        }
                        else
                            throw new PermissionException("You do not have the permission to void a bill.");
                    }
                }
            }
        }
        CustomerBO selectCustomer_customerEvent(object sender, CustomerEventArgs e)
        {
            using (CustomersForm form = new CustomersForm(e.CustomerID, e.Phone))
            {
                form.ShowDialog();
                return form.Customer;
            }
        }
        private void PrintBill(bool finalBill, Guid voucherID)
        {
            using (RoleBI roleBI = RoleFactoryBI.GetRoleBI(Roles.SALES_PRINT_KOT))
                if (!roleBI.IsAllowed)
                    throw new PermissionException("You are not allowed to print KOT");

            if (!finalBill)
                Accounts.Print.Thermal.PrintKot(voucherID, bill.Values.ToList());
            else
            {
                using (RoleBI roleBI = RoleFactoryBI.GetRoleBI(Roles.SALES_PRINT_BILL))
                {
                    if (roleBI.IsAllowed)
                    {
                        Accounts.Print.Thermal.PrintBill(true, voucherID, bill.Values.ToList());

                    }
                    else
                        throw new PermissionException("You are not allowed to print KOT");
                }
            }
        }

        private List<StringType> GetVoidReason(Dictionary<string, string> filter)
        {
            List<StringType> list = new List<StringType>();
            list.Add(new StringType("Discount"));
            list.Add(new StringType("Printing Fault"));
            list.Add(new StringType("Item Changed"));
            list.Add(new StringType("Quantity Reduced"));
            list.Add(new StringType("Costing Bill for Party"));
            list.Add(new StringType("Cashier Mistake"));
            list.Add(new StringType("Management Freesale"));
            list.Add(new StringType("Other"));
            return list.Where(i => i.Description.ToLower().Contains(filter["Name"].ToLower().Trim())).ToList();
        }
        public void SetNewBillID(Guid voucherID)
        {
            this.newBillID = voucherID;
        }
        public SalesBillItemBO CurrentProduct(int index)
        {
            if ((index != -1) && (index < bill.Count))
                return bill.ElementAt(index).Value;
            else
                return null;

            //if (dgvProducts.Rows.Count == 0)
            //    return null;
            //SalesBillItemBO product = bill.ElementAt(dgvProducts.CurrentRow.Index).Value;
            //return product;
        }
        private void ShowAmount()
        {
            decimal taxAmount = bill.Values.Sum(b => b.TaxAmount);
            decimal discountAmount = bill.Values.Sum(b => b.DiscountAmount);
            decimal grossAmount = bill.Values.Sum(b => b.GrossAmount);
            decimal valueAmount = bill.Values.Sum(b => b.Value);
            decimal serviceChargeAmount = bill.Values.Sum(b => b.ServiceChargeAmount);
            //bill.Values.ToList();
            saleForm.ShowAmount(discountAmount, grossAmount, serviceChargeAmount, taxAmount, valueAmount, bill.Values.ToList());
        }
        public void SetDiscount(SalesBillItemBO product, decimal discount)
        {
            if (product == null)
                return;
            BillHelperFunctions.SetDiscount(product.productID, discount, customer, bill);
            ShowAmount();
        }
        public void SetAmount(SalesBillItemBO product, BindingSource bindingSource, decimal amount)
        {
            if (product == null)
                return;
            BillHelperFunctions.SetAmount(product, amount, bindingSource, bill);
            ShowAmount();
        }
        public bool ProductRemove(SalesBillItemBO product)
        {
            if (product == null)
                return false;
            if (product.Printed > 0)
            {
                using (RoleBI roleBI = RoleFactoryBI.GetRoleBI(Roles.SALES_EDIT_PRINTED_PRODUCT))
                {
                    if (roleBI.IsAllowed)
                    {
                        if (MessageBox.Show(string.Format("Already {0} items have been printed.\n\rAre you sure you want to delete this item?", product.Printed), "Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
                            return false;
                        //If BillList(Location).Printed <> 0 Then ItemsDeleted.Add("Deleted " & BillList(Location).Printed & " " & BillList(Location).Name & " from Bill No " & mBillNo)
                        bill.Remove(new BillItemKey(product.productID, product.Printed == 0));
                        ShowAmount();
                    }
                    else
                        throw new PermissionException("You are not allowed to delete already printed products");
                    return true;
                }
            }
            return false;
        }
        public void SetQuantity(SalesBillItemBO product, BindingSource bindingSource, decimal quantity, bool absolute, bool prompt)
        {
            if (product == null)
                return;
            BillHelperFunctions.SetQuantity(product, quantity, absolute, prompt, bindingSource, bill);
            ShowAmount();
        }

        public void ChangeRate(int index)
        {
            using (RoleBI roleBI = RoleFactoryBI.GetRoleBI(Roles.SALES_CHANGE_RATE))
            {
                if (roleBI.IsAllowed)
                {
                    SalesBillItemBO product = bill.ElementAt(index).Value;
                    decimal rate = 0;
                    InputBoxResult result = InputBox.Show("Enter Rate", "Rate", product.Price.ToString(), InputBox_Validating);
                    if (result.OK)
                        rate = Convert.ToDecimal(result.Text);
                    if (rate != 0)
                    {
                        BillHelperFunctions.SetRate(product.productID, rate, bill);
                        ShowAmount();
                    }
                }
                else
                    throw new PermissionException("You do not have permission to Change the Rate");

            }
        }
        private void InputBox_Validating(object sender, InputBoxValidatingArgs e)
        {
        }
        private void LoadBill(Guid voucherID)
        {
            ClearBill();
            List<InventoryDisplayBO> iList = new List<InventoryDisplayBO>();
            new SaleVoucherBI().GetSaleVoucher(voucherID, ref billInfo, ref iList);

            this.customer = new CustomerBI().GetCustomer(billInfo.CustomerID);
            saleForm.ShowInfo(billInfo.BillID, billInfo.KotID, billInfo.CreationDate, billInfo.Date.Value, billInfo.LastEditDate, customer.Name, billInfo.TableID, billInfo.WaiterID, new WaiterBI().GetWaiter(billInfo.WaiterID).Name);

            foreach (InventoryDisplayBO inventory in iList)
            {
                if (inventory.ComplexProductID.HasValue)
                {
                    BillItemKey key = new BillItemKey(inventory.ComplexProductID.Value, inventory.Quantity == 0);
                    if (!bill.ContainsKey(key))
                    {
                        decimal rate = 0, quantity = 0;
                        string name = "";
                        new SaleVoucherBI().GetComplexBillInformation(voucherID, inventory.ComplexProductID.Value, ref rate, ref quantity, ref name);
                        bill.Add(key, new SalesBillItemBO
                        {
                            productID = inventory.ComplexProductID.Value,
                            Discount = inventory.Discount,
                            Name = name,
                            Price = rate,
                            Printed = quantity,
                            Quantity = quantity,
                            Tax = inventory.Tax,
                        });

                    }
                }
                else
                {
                    BillItemKey key = new BillItemKey(inventory.ProductID, inventory.Quantity == 0);
                    bill.Add(key, new SalesBillItemBO
                    {
                        productID = inventory.ProductID,
                        Discount = inventory.Discount,
                        Name = inventory.ProductName,
                        Price = inventory.Rate,
                        Printed = inventory.Quantity,
                        Quantity = inventory.Quantity,
                        Tax = inventory.Tax,
                    });
                }
            }
            ShowAmount();

        }
        public void LoadBillFromTable(string tableName)
        {
            if (!string.IsNullOrEmpty(tableName))
            {
                Guid? tID = new SaleVoucherBI().GetPendingVoucherID(tableName);
                if (tID.HasValue)
                {
                    LoadBill(tID.Value);
                }

            }
            else
            {
                InputBoxResult result = InputBox.Show("Enter Table Number", "Table", "0", InputBox_Validating);
                if (result.OK)
                {
                    string tableID = result.Text.Trim();
                    if ((tableID != "C") && (tableID != "") && (!tableID.Contains(".")))
                    {
                        Guid? tID = new SaleVoucherBI().GetPendingVoucherID(tableID);
                        if (tID.HasValue)
                        {
                            LoadBill(tID.Value);
                        }
                    }
                    else
                        ClearBill();
                }
            }
        }

        public void CancelBillChanges()
        {
            if (bill.Count != 0)
                if (MessageBox.Show("Cancel current bill?", "Cancel bill", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.No)
                    return;
            ClearBill();

        }
        public void ClearBill()
        {
            billInfo = null;
            ShowCustomerList(true);
            bill.Clear();
            saleForm.ClearBill(bill);
        }
        public void FormLoad()
        {
            if (newBillID.HasValue)
            {
                LoadBill(newBillID.Value);
            }

        }

        internal void SettleBill()
        {
            if (billInfo == null)
                return;
            SettleOptions option = SettleOptions.Cancel;
            using (BillSettleForm frm = new BillSettleForm())
            {
                frm.ShowDialog();
                option = frm.optionChosen;
            }
            switch (option)
            {
                case SettleOptions.Cancel:
                    break;
                case SettleOptions.Cash:

            }
            throw new NotImplementedException();
        }
    }
}
// How to load a bill
//LoadBill(((PendingBillsBO)bsPending.Current).voucherID);
//               ChangeFormState(SaleFormState.Billing);