using System;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using System.Globalization;
using System.Linq;
using System.Threading;
using System.Windows.Forms;
using Tanshu.Accounts.BI;
using Tanshu.Accounts.Contracts;
using Tanshu.Accounts.Helpers;
using Tanshu.Common;


namespace Tanshu.Accounts.PointOfSale
{
    public partial class SalesForm : Form
    {
        private static readonly Logging.SqlLogger Log = new Logging.SqlLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

        #region Waiting
        private List<Guid> selectedBills = new List<Guid>();
        private List<PendingBillsBO> pendingBills = new List<PendingBillsBO>();
        private PendingType pendingList = PendingType.Today;
        #endregion
        private SaleFormState _formState = SaleFormState.Waiting;
        #region Billing
        private Dictionary<BillItemKey, SalesBillItemBO> bill = new Dictionary<BillItemKey, SalesBillItemBO>();
        private CustomerBO customer = new CustomerBI().GetCustomer(new Guid("F016CBAD-206C-42C0-BB1D-6006CE57BAB5"));
        private Guid? _advanceID;
        #endregion
        private VoucherBO _billInfo;
        object lockObject = new object();
        Guid? _newBillID;

        readonly int _floor;
        public SalesForm()
        {
            InitializeComponent();
            btnCustomer.Text = customer.Name;
            lblUser.Text = CurrentUser.user.Name;
            var floorString = System.Configuration.ConfigurationManager.AppSettings["floor"];
            _floor = !string.IsNullOrEmpty(floorString) ? Convert.ToInt32(floorString.Trim()) : 0;
        }

        public SalesForm(Guid voucherID)
            : this()
        {
            _newBillID = voucherID;
        }

        private void SalesForm_KeyDown(object sender, KeyEventArgs e)
        {
            if (_formState == SaleFormState.Billing)
            {
                #region Billing KeyDown
                switch (e.KeyCode)
                {
                    case Keys.F2:
                        {
                            if (dgvProducts.Rows.Count > 0)
                                SetQuantity(CurrentProduct, 0, false, true);
                            break;
                        }
                    case Keys.F3:
                        {
                            btnDiscount_Click(sender, new EventArgs());
                            break;
                        }
                    case Keys.F4:
                        {
                            if (!e.Alt)
                                ShowCustomerList(false);
                            break;
                        }
                    case Keys.F5:
                        {
                            btnWaiter_Click(sender, new EventArgs());
                            break;
                        }
                    case Keys.F7:
                        {
                            using (SelectProduct selectProduct = new SelectProduct(new FiltersBI().GetFilteredProducts, true))
                            {
                                selectProduct.ShowDialog();
                                if (selectProduct.SelectedItem != null)
                                    AddProductToGrid(selectProduct.SelectedItem.ProductID);
                            }
                            break;
                        }
                    case Keys.F8:
                        {
                            LoadBillFromTable();
                            break;
                        }
                    case Keys.F9:
                        {
                            if (dgvProducts.Rows.Count > 0)
                                SetAmount(CurrentProduct, -1);
                            break;
                        }
                    case Keys.F10:
                        {
                            if (dgvProducts.Rows.Count > 0)
                                SetAmount(CurrentProduct, -1);
                            break;
                        }
                    case Keys.F11:
                        {
                            btnPrintBill_Click(sender, e);
                            break;
                        }
                    case Keys.F12:
                        {
                            btnPrintKot_Click(sender, e);
                            break;
                        }
                    case Keys.Delete:
                        {
                            if (dgvProducts.Rows.Count > 0)
                                ProductRemove(CurrentProduct);
                            break;
                        }
                    case Keys.Add:
                        {
                            if (dgvProducts.Rows.Count > 0)
                                SetQuantity(CurrentProduct, 1, false, false);
                            break;
                        }
                    case Keys.Subtract:
                        {
                            if (dgvProducts.Rows.Count > 0)
                                SetQuantity(CurrentProduct, -1, false, false);
                            break;
                        }
                    case Keys.Up:
                        {
                            if ((bindingSource.Position >= 1) && (!dgvProducts.Focused))
                                bindingSource.Position -= 1;
                            break;
                        }
                    case Keys.Down:
                        {
                            if ((bindingSource.Position < bindingSource.Count - 1) && (!dgvProducts.Focused))
                                bindingSource.Position += 1;
                            break;
                        }
                    case Keys.Escape:
                        {
                            if (bill.Count != 0)
                                if (MessageBox.Show("Cancel current bill?", "Cancel bill", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.No)
                                    return;
                            ClearBill();
                            break;
                        }
                }
                #endregion
            }
            else
            {
                #region Waiting KeyDown
                switch (e.KeyCode)
                {
                    case Keys.F6:
                        {
                            ChangeFormState(SaleFormState.Billing);
                            break;
                        }
                    case Keys.F8:
                        {
                            LoadBillFromTable();
                            break;
                        }
                }

                #endregion
            }
        }

        #region Helper Functions
        private void ClearBill()
        {
            ShowCustomerList(true);
            this._billInfo = null;
            this.txtBillID.Text = "";
            this.txtKotID.Text = "";
            this.txtCreationDate.Text = "";
            this.txtDate.Text = "";
            this.txtLastEditDate.Text = "";
            this.txtNarration.Text = "";
            this.txtUserID.Text = "";
            this.txtTableID.Text = "";
            this.btnWaiter.Text = "Waiter - F5";
            this.btnWaiter.Tag = null;
            txtGrossTax.Text = "0.00";
            txtDiscount.Text = "0.00";
            txtGrossAmount.Text = "0.00";
            txtAmount.Text = "0.00";
            bill.Clear();
            _advanceID = null;
            bindingSource.DataSource = bill.Values;
            ChangeFormState(SaleFormState.Waiting);
        }
        private void AddProductToGrid(Guid productID)
        {
            BillHelperFunctions.AddProductToGrid(productID, bindingSource, bill);
            CalculateAmount();
        }

        private void SetQuantity(SalesBillItemBO product, decimal quantity, bool absolute, bool prompt)
        {
            if (product == null)
                return;
            BillHelperFunctions.SetQuantity(product, quantity, absolute, prompt, bindingSource, bill);
            CalculateAmount();
        }
        private void SetAmount(SalesBillItemBO product, decimal amount)
        {
            if (product == null)
                return;
            BillHelperFunctions.SetAmount(product, amount, bindingSource, bill);
            CalculateAmount();
        }
        private void SetDiscount(SalesBillItemBO product, decimal discount)
        {
            if (product == null)
                return;
            BillHelperFunctions.SetDiscount(product.productID, discount, customer, bill);
            CalculateAmount();
            return;
        }
        private bool ProductRemove(SalesBillItemBO product)
        {
            if (product == null)
                return false;
            if (product.Printed > 0)
            {
                if (!Thread.CurrentPrincipal.IsInRole("Sales/EditPrintedProduct"))
                {
                    MessageBox.Show("You are not allowed to delete already printed products");
                    return false;
                }
                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));
            CalculateAmount();
            return true;
        }
        private void InputBox_Validating(object sender, InputBoxValidatingArgs e)
        {
        }

        private void button_Click(object sender, EventArgs e)
        {
            var button = sender as Button;
            if (button == null)
                return;
            var tag = (Guid)button.Tag;
            AddProductToGrid(tag);
        }
        private void CalculateAmount()
        {
            txtGrossTax.Text = string.Format("{0:#0.00}", bill.Values.Sum(b => b.TotalTax));
            txtDiscount.Text = string.Format("{0:#0.00}", bill.Values.Sum(b => b.DiscountAmount));
            txtGrossAmount.Text = string.Format("{0:#0.00}", bill.Values.Sum(b => b.GrossAmount));
            txtAmount.Text = string.Format("{0:#0.00}", Math.Round(bill.Values.Sum(b => b.Value)));
            bindingSource.DataSource = bill.Values.ToList();
            dgvProducts.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.DisplayedCells);
        }

        private void btnPrintBill_Click(object sender, EventArgs e)
        {
            var val = Save(true);
            if (val == null)
                return;
            PrintBill(val.VoucherID);
            ClearBill(); 
        }
        private void btnPrintKot_Click(object sender, EventArgs e)
        {
            var val = Save(false);
            if (val == null)
                return;
            PrintKOT(val.VoucherID);
            ClearBill(); 
        }
        private void btnCancel_Click(object sender, EventArgs e)
        {
            if (bill.Count != 0)
                if (MessageBox.Show("Cancel current bill?", "Cancel bill", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.No)
                    return;
            ClearBill();
        }

        private SalesBillItemBO CurrentProduct
        {
            get
            {
                if (dgvProducts.Rows.Count == 0)
                    return null;
                SalesBillItemBO product = bill.ElementAt(dgvProducts.CurrentRow.Index).Value;
                return product;
            }
        }
        private void btnQuantity_Click(object sender, EventArgs e)
        {
            if (dgvProducts.Rows.Count > 0)
                SetQuantity(CurrentProduct, 0, false, true);
        }
        private void btnDiscount_Click(object sender, EventArgs e)
        {
            if (dgvProducts.Rows.Count > 0)
                SetDiscount(CurrentProduct, -1);
        }
        #endregion

        private void SalesForm_Load(object sender, EventArgs e)
        {
            ChangeFormState(SaleFormState.Waiting);
            if (_newBillID.HasValue)
            {
                LoadBill(_newBillID.Value);
                ChangeFormState(SaleFormState.Billing);
            }
            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.ProductDAO(connection))
                {
                    Dictionary<string, string> filter = new Dictionary<string, string>();
                    filter.Add("Name", "");
                    filter.Add("ProductGroup", "");
                    var buttons = dao.GetFilteredProducts(filter);
                    ControlFactory.GenerateButtons(ref pnlBilling, new Rectangle(489, 94, 481, 385), 6, 6, 2, buttons, new ButtonClickDelegate(button_Click));
                }
            }
        }

        private void ChangeFormState(SaleFormState state)
        {
            _formState = state;
            if (state == SaleFormState.Billing)
            {
                pnlWaiting.Visible = false;
                pnlBilling.Visible = true;
            }
            else
            {
                pnlWaiting.Visible = true;
                pnlBilling.Visible = false;
                ListUnpaidBills();
            }
        }

        #region Save Bill

        private VoucherBO Save(bool finalBill)
        {
            decimal? amount = null;
            VoucherBO oldVoucher = null;
            if (_billInfo != null)
                oldVoucher = new VoucherBI().GetVoucher(_billInfo.VoucherID);

            if (oldVoucher != null && oldVoucher.Printed)
            {
                if (!Thread.CurrentPrincipal.IsInRole("Sales/EditBill"))
                {
                    MessageBox.Show("You are not authorized to access");
                    return null;
                }
                amount = oldVoucher.Amount;
            }
            if (bill.Count == 0)
                return null;

            //
            if (_advanceID.HasValue)
            {
                var billAmount = Math.Round(bill.Values.Sum(b => b.Value));
                decimal advanceAmount = 0;
                using (var connection = new SqlDAO.SqlConnectionDAO())
                {
                    using (var dao = new SqlDAO.AdvanceDAO(connection))
                    {
                        advanceAmount = dao.Get(_advanceID.Value).Amount;
                    }
                }

                if (advanceAmount > billAmount)
                {
                    if (MessageBox.Show("Advance adjusted amount more than bill amount, advance will not be adjusted.\n\rContinue will bill print?", "Advace adjustment error",
                                    MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
                        return null;
                    else
                        _advanceID = null;
                }
            }
            var saved = _billInfo == null ? AddNewSale(finalBill) : UpdateSale(finalBill);
            if (amount != null)
                Log.Warn(string.Format("{4} modified bill no {0}/{1} from (Rs. {2:#,00}) to (Rs. {3:#,00})", _billInfo.BillID, _billInfo.TableID, amount.Value, saved.Amount, Thread.CurrentPrincipal.Identity.Name));
            if (_newBillID.HasValue)
                this.Close();
            return saved;
        }
        private void PrintBill(Guid voucherID)
        {
            if (!Thread.CurrentPrincipal.IsInRole("Sales/PrintBill"))
                MessageBox.Show("You are not authorized to access");
            else
            {
                Print.Thermal.PrintBill(voucherID);
                Print.Thermal.PrintCustomerKot("KOT", voucherID, bill.Values.ToList());
            }
        }
        private void PrintKOT(Guid voucherID)
        {
            if (!Thread.CurrentPrincipal.IsInRole("Sales/PrintKOT"))
                MessageBox.Show("You are not authorized to access");
            else
                Print.Thermal.PrintWaiterKot("KOT", voucherID, bill.Values.ToList());
        }
        private VoucherBO AddNewSale(bool finalBill)
        {
            if (_billInfo != null)
            {
                MessageBox.Show("Error in AddNewSale, there is a previous sale in memory", "Error");
                return null;
            }

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

            var user = CurrentUser.user;
            var voucher = new VoucherBO
            {
                CustomerID = customer.CustomerID,
                PaidStatus = PaidStatus.Pending,
                TableID = txtTableID.Text,
                WaiterID = (Guid)btnWaiter.Tag,
                Printed = finalBill,
                Date = DateTime.Now,
                Narration = txtNarration.Text,
                UserID = user.UserID,
                Floor = _floor,
                AdvanceID = _advanceID
            };
            voucher.Inventories = new VoucherBI().SaleInventory(bill.Values, null);
            return new VoucherBI().Insert(voucher);
        }
        private VoucherBO UpdateSale(bool finalBill)
        {
            if (btnWaiter.Tag == null)
                btnWaiter.Tag = new WaiterBI().GetWaiters()[0].WaiterID;

            var user = CurrentUser.user;
            var voucher = new VoucherBO
            {
                VoucherID = _billInfo.VoucherID,
                UserID = _billInfo.UserID,
                Date = _billInfo.Date,
                Narration = _billInfo.Narration,
                Alarm = _billInfo.Alarm,
                CustomerID = customer.CustomerID,
                PaidStatus = _billInfo.PaidStatus,
                Printed = _billInfo.Printed || finalBill,
                TableID = txtTableID.Text,
                VoidReason = _billInfo.VoidReason,
                WaiterID = (Guid)btnWaiter.Tag,
                Floor = _floor,
                AdvanceID = _advanceID
            };
            if ((!_billInfo.Printed) && finalBill)
                voucher.Date = null;
            voucher.Inventories = new VoucherBI().SaleInventory(bill.Values, _billInfo.VoucherID);
            return new VoucherBI().Update(voucher);
        }
        #endregion


        private void LoadBillFromTable()
        {
            InputBoxResult result = InputBox.Show("Enter Table Number", "Table", "0", InputBox_Validating);
            if (result.OK)
            {
                txtTableID.Text = result.Text.Trim();
                if ((txtTableID.Text != "C") && (txtTableID.Text != "") && (!txtTableID.Text.Contains(".")))
                {
                    Guid? tID = new VoucherBI().GetPendingVoucherID(txtTableID.Text, _floor);
                    if (tID.HasValue)
                    {
                        LoadBill(tID.Value);
                        ChangeFormState(SaleFormState.Billing);
                    }
                }
                else
                    ClearBill();
            }
        }

        private void LoadBill(Guid voucherID)
        {
            ClearBill();
            _billInfo = new VoucherBI().GetVoucher(voucherID);

            this.txtBillID.Text = _billInfo.BillID;
            this.txtKotID.Text = _billInfo.KotID;
            this.txtCreationDate.Text = _billInfo.CreationDate.ToString("HH:mm dd-MMM-yyyy");
            this.txtDate.Text = _billInfo.Date.Value.ToString("HH:mm dd-MMM-yyyy");
            this.txtLastEditDate.Text = _billInfo.LastEditDate.ToString("HH:mm dd-MMM-yyyy");
            this.txtNarration.Text = _billInfo.Narration;
            this.txtUserID.Text = _billInfo.User.Name;
            this.customer = _billInfo.Customer;
            this.btnCustomer.Text = this.customer.Name;
            this.txtTableID.Text = _billInfo.TableID;
            this.btnWaiter.Tag = _billInfo.WaiterID;
            this._advanceID = _billInfo.AdvanceID;
            this.btnWaiter.Text = string.Format("{0} - F5", _billInfo.Waiter.Name);

            foreach (var inventory in _billInfo.Inventories)
            {
                var 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,
                    Vat = inventory.Vat,
                    ServiceTax = inventory.ServiceTax
                });
            }
            CalculateAmount();

        }

        #region Waiting

        private void btnStartBill_Click(object sender, EventArgs e)
        {
            ChangeFormState(SaleFormState.Billing);
        }

        private void btnSelectBill_Click(object sender, EventArgs e)
        {
            if (bsPending.Current != null)
            {
                LoadBill(((PendingBillsBO)bsPending.Current).voucherID);
                ChangeFormState(SaleFormState.Billing);
            }
        }

        private void tmrPending_Tick(object sender, EventArgs e)
        {
            if (chkRefresh.Checked)
                ListUnpaidBills();
        }

        private void ListUnpaidBills()
        {
            lock (lockObject)
            {
                pendingBills = new VoucherBI().GetPendingBills(pendingList, _floor);
                bsPending.DataSource = pendingBills;
                var alarmBills = new VoucherBI().GetPendingBills(PendingType.Alarms, _floor).OrderBy(b => b.AlarmTime).ToList();
                if (alarmBills.Count > 0)
                {
                    var al = alarmBills.First();
                    var seconds = al.AlarmTime.Value.Subtract(DateTime.Now).TotalSeconds;
                    lblUser.Text = seconds <= 0 ? string.Format("Alarm {0:hh:MM}", al.AlarmTime) : CurrentUser.user.Name;
                }
                else
                {
                    lblUser.Text = CurrentUser.user.Name;
                }
            }
        }

        private void dgvPending_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            try
            {
                DataGridView dgv = sender as DataGridView;
                PendingBillsBO data = dgv.Rows[e.RowIndex].DataBoundItem as PendingBillsBO;
                if (data.Printed)
                    e.CellStyle.BackColor = Color.LightSlateGray;
            }
            catch
            {
                // Catch and swallow exception when DataGridView attemps to get values for removed rows.
            }
        }

        private void tcPending_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch (tcPending.SelectedTab.Text)
            {
                case "Today":
                    pendingList = PendingType.Today;
                    break;
                case "Week":
                    pendingList = PendingType.Week;
                    break;
                case "All":
                    pendingList = PendingType.All;
                    break;
                case "Alarms":
                    pendingList = PendingType.Alarms;
                    break;
            }
            ListUnpaidBills();
        }

        private void dgvPending_CellValuePushed(object sender, DataGridViewCellValueEventArgs e)
        {
            if (e.ColumnIndex != 0) return;
            if ((bool)e.Value)
                selectedBills.Add(pendingBills[e.RowIndex].voucherID);
            else
                selectedBills.Remove(pendingBills[e.RowIndex].voucherID);
        }

        private void dgvPending_CellValueNeeded(object sender, DataGridViewCellValueEventArgs e)
        {
            if (e.ColumnIndex != 0) return;
            if (e.RowIndex > pendingBills.Count - 1) return;
            e.Value = selectedBills.Contains(pendingBills.ElementAt(e.RowIndex).voucherID);
        }
        #endregion

        #region Billing
        private void btnCustomer_Click(object sender, EventArgs e)
        {
            ShowCustomerList(false);
        }

        private void ShowCustomerList(bool reset)
        {
            if ((customer.CustomerID == new Guid("F016CBAD-206C-42C0-BB1D-6006CE57BAB5")) && (!reset))
            {
                using (SelectCustomer selectCustomer = new SelectCustomer(new FiltersBI().GetFilteredCustomers, true))
                {
                    selectCustomer.customerEvent += new CustomerEventHandler(selectCustomer_customerEvent);
                    selectCustomer.ShowDialog();
                    if (selectCustomer.SelectedItem != null)
                    {
                        customer = selectCustomer.SelectedItem;
                        btnCustomer.Text = customer.Name;
                    }
                    else
                    {
                        customer = new CustomerBI().GetCustomer(new Guid("F016CBAD-206C-42C0-BB1D-6006CE57BAB5"));
                    }
                }
            }
            else if (!reset)
            {
                using (CustomersForm form = new CustomersForm(customer.CustomerID, customer.Phone))
                {
                    form.ShowDialog();
                }
            }
            else
            {
                customer = new CustomerBI().GetCustomer(new Guid("F016CBAD-206C-42C0-BB1D-6006CE57BAB5"));
                btnCustomer.Text = customer.Name;

            }
        }

        CustomerBO selectCustomer_customerEvent(object sender, CustomerEventArgs e)
        {
            using (CustomersForm form = new CustomersForm(e.CustomerID, e.Phone))
            {
                form.ShowDialog();
                return form.Customer;
            }
        }

        #endregion


        private void dgvPending_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            if ((dgvProducts.Rows.Count > 0) && (dgvPending.CurrentRow != null))
            {
                LoadBill(((PendingBillsBO)bsPending.Current).voucherID);
                ChangeFormState(SaleFormState.Billing);
            }
        }

        private void btnRefresh_Click(object sender, EventArgs e)
        {
            ListUnpaidBills();
        }

        private void btnVoid_Click(object sender, EventArgs e)
        {
            if (_billInfo != null)
            {
                if ((_billInfo.Printed) && (!Thread.CurrentPrincipal.IsInRole("Sales/VoidPrintedBill")))
                    MessageBox.Show("Cannot void a paid bill");
                else 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 VoucherBI().VoidBill(_billInfo.VoucherID, voidReason.SelectedItem.Description, CurrentUser.user.UserID);
                        ClearBill();
                    }
                    else
                    {
                        MessageBox.Show("Please Select a reason if you want to void the bill", "Bill NOT Voided", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                    }
                }
            }
        }

        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();
        }
        private void btnRate_Click(object sender, EventArgs e)
        {
            if (!Thread.CurrentPrincipal.IsInRole("Sales/ChangeRate"))
                MessageBox.Show("You are not authorized to access");
            else
            {
                if (dgvProducts.Rows.Count > 0)
                {
                    SalesBillItemBO product = bill.ElementAt(dgvProducts.CurrentRow.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);
                        CalculateAmount();
                    }
                }
            }
        }

        private void btnClear_Click(object sender, EventArgs e)
        {
            ClearBill();
        }

        private void btnPaidCash_Click(object sender, EventArgs e)
        {
            var user = CurrentUser.user;
            new VoucherBI().DeclareBillsPaid(user.UserID, selectedBills, PaidStatus.Cash);
            ListUnpaidBills();
        }

        private void btnPaidCC_Click(object sender, EventArgs e)
        {
            var user = CurrentUser.user;
            new VoucherBI().DeclareBillsPaid(user.UserID, selectedBills, PaidStatus.CreditCard);
            ListUnpaidBills();
        }

        private void btnAlarm_Click(object sender, EventArgs e)
        {
            if (bsPending.Current != null)
            {
                PendingBillsBO billAlarm = (PendingBillsBO)bsPending.Current;
                InputBoxResult result = InputBox.Show(
                    string.Format("Alarm for Bill {0} Rs. {1}", billAlarm.BillNo, billAlarm.Amount),
                    "Alarm",
                    string.Format("{0:dd-MMM-yyy HH:mm}", billAlarm.LastEdited),
                    InputBox_Validating);
                if (result.OK)
                {
                    DateTime alarmTime;
                    if (result.Text == string.Empty)
                    {
                        new VoucherBI().SetAlarm(billAlarm.voucherID, null);
                        MessageBox.Show("Alarm Cleared", "Alarm Cleared", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                    else if (DateTime.TryParseExact(result.Text, "dd-MMM-yyyy HH:mm", new CultureInfo("en-US"), DateTimeStyles.None, out alarmTime))
                    {
                        new VoucherBI().SetAlarm(billAlarm.voucherID, alarmTime);
                        MessageBox.Show("Alarm set", "Alarm Set", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                    else
                    {
                        MessageBox.Show("Alarm NOT set, please try again", "Alarm NOT Set", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
            }
        }

        private void btnBillList_Click(object sender, EventArgs e)
        {
            if (!Thread.CurrentPrincipal.IsInRole("Security/CreateUser"))
                return;

            var result = InputBox.Show("Bill No", "Bill No", "", InputBox_Validating);
            if (result.OK)
            {
                var voucher = new VoucherBI().GetVoucher(result.Text);
                if (voucher == null)
                    return;
                LoadBill(voucher.VoucherID);
                ChangeFormState(SaleFormState.Billing);
            }



            //#region Filters
            //decimal? minValue = 0, maxValue = 0;
            //decimal valTemp;
            //DateTime? fromDate = DateTime.Now, toDate = DateTime.Now; // used in filters
            //DateTime dateTemp;
            //bool? showVoided;

            //InputBoxResult result = InputBox.Show("Start Date", "Start Date", string.Format("{0:dd-MMM-yyy}", fromDate), InputBox_Validating);
            //if ((result.OK) && (DateTime.TryParseExact(result.Text, "dd-MMM-yyyy", new CultureInfo("en-US"), DateTimeStyles.None, out dateTemp)))
            //{
            //    fromDate = dateTemp;
            //}
            //result = InputBox.Show("Finish Date", "Finish Date", string.Format("{0:dd-MMM-yyy}", toDate), InputBox_Validating);
            //if ((result.OK) && (DateTime.TryParseExact(result.Text, "dd-MMM-yyyy", new CultureInfo("en-US"), DateTimeStyles.None, out dateTemp)))
            //{
            //    toDate = dateTemp;
            //}
            //result = InputBox.Show("Minimum Value", "Minimum Value", "0", InputBox_Validating);
            //if ((result.OK) && (decimal.TryParse(result.Text, out valTemp)))
            //{
            //    minValue = valTemp;
            //}
            //result = InputBox.Show("Maximum Value", "Maximum Value", "0", InputBox_Validating);
            //if ((result.OK) && (decimal.TryParse(result.Text, out valTemp)))
            //{
            //    maxValue = valTemp;
            //}
            //DialogResult dResult = MessageBox.Show("Show Un-Voided Bills only", "Un-Voided", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
            //if (dResult == DialogResult.Yes)
            //    showVoided = false;
            //else if (dResult == DialogResult.No)
            //    showVoided = true;
            //else
            //    showVoided = null;
            //#endregion
            //List<PendingBillsBO> billList = ManagementBI.GetBillList(fromDate, toDate, minValue, maxValue, showVoided);
            //using (SelectBill selectBill = new SelectBill(billList, true))
            //{
            //    selectBill.ShowDialog();
            //    if (selectBill.SelectedItem != null)
            //    {
            //        LoadBill(selectBill.SelectedItem.voucherID);
            //        ChangeFormState(SaleFormState.Billing);

            //    }
            //}
        }

        private void dgvProducts_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            DataGridView dgv = sender as DataGridView;
            SalesBillItemBO data = dgv.Rows[e.RowIndex].DataBoundItem as SalesBillItemBO;

            if (data.Printed > 0)
            {
                e.CellStyle.SelectionBackColor = Color.HotPink;
                e.CellStyle.BackColor = Color.LightPink;
            }
            else
            {
                e.CellStyle.SelectionBackColor = Color.Green;
                e.CellStyle.BackColor = Color.LightGreen;
            }
        }

        private void btnWaiter_Click(object sender, EventArgs e)
        {
            using (SelectWaiter selectWaiter = new SelectWaiter(new WaiterBI().GetFilteredWaiters, true))
            {
                selectWaiter.waiterEvent += new WaiterEventHandler(selectWaiter_waiterEvent);
                selectWaiter.ShowDialog();
                if (selectWaiter.SelectedItem != null)
                {
                    btnWaiter.Text = string.Format("{0} - F5", selectWaiter.SelectedItem.Name);
                    btnWaiter.Tag = selectWaiter.SelectedItem.WaiterID;
                }
                else
                {
                    btnWaiter.Text = "Select Waiter - F5";
                    btnWaiter.Tag = new WaiterBI().GetWaiters()[0].WaiterID;
                }
            }
        }
        WaiterBO selectWaiter_waiterEvent(object sender, WaiterEventArgs e)
        {
            WaiterBO waiter = e.Waiter;
            if (!Thread.CurrentPrincipal.IsInRole("Waiter/Master"))
                return waiter;

            switch (e.Action)
            {
                case 1: // Add
                    new WaiterBI().Insert(waiter);
                    e.Handled = true;
                    return waiter;
                case 2: // Edit
                    new WaiterBI().Update(waiter);
                    e.Handled = true;
                    return waiter;
                case 3: // Delete
                    e.Handled = new WaiterBI().Delete(waiter.WaiterID);
                    return new WaiterBI().GetWaiter(1);
                default:
                    throw new ArgumentException();
            }
        }

        private void btnResetCustomer_Click(object sender, EventArgs e)
        {
            ShowCustomerList(true);
        }

        private void btnPaidStaff_Click(object sender, EventArgs e)
        {
            var user = CurrentUser.user;
            new VoucherBI().DeclareBillsPaid(user.UserID, selectedBills, PaidStatus.Staff);
            ListUnpaidBills();
        }

        private void btnPaidCredit_Click(object sender, EventArgs e)
        {
            var user = CurrentUser.user;
            new VoucherBI().DeclareBillsPaid(user.UserID, selectedBills, PaidStatus.Credit);
            ListUnpaidBills();
        }

        private void btnAdvance_Click(object sender, EventArgs e)
        {
            if (_billInfo != null && _billInfo.AdvanceID.HasValue)
                return;
            using (var frm = new AdjustAdvanceForm(true))
            {
                frm.ShowDialog();
                _advanceID = frm.AdvanceID;
            }

        }

        private void btnPaidNc_Click(object sender, EventArgs e)
        {
            var user = CurrentUser.user;
            new VoucherBI().DeclareBillsPaid(user.UserID, selectedBills, PaidStatus.Nc);
            ListUnpaidBills();
        }
    }
}