using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Threading;
using System.Windows.Forms;
using Tanshu.Accounts.Contracts;
using Tanshu.Accounts.Entities;
using Tanshu.Accounts.Helpers;
using Tanshu.Accounts.Repository;

namespace Tanshu.Accounts.PointOfSale.Sales
{
    public partial class SalesForm : Form, ISaleForm
    {
        private ProductGroup _currentProductGroup;
        public SalesForm(BillController billController)
        {
            InitializeComponent();
            _billController = billController;
            billController.InitGui(this);
        }

        #region ISaleForm Members
        public void SetUserName(string name)
        {
            Text = name;
        }

        public void SetCustomerDisplay(string name)
        {
            btnCustomer.Text = name;
        }

        public void ShowInfo(Voucher voucher)
        {
            if (voucher.VoucherID == Guid.Empty)
            {
                txtTableID.Text = voucher.Table.Name;
                txtPax.Text = voucher.Pax.ToString();
            }
            else
            {
                txtBillID.Text = voucher.FullBillID;
                txtKotID.Text = "K-" + voucher.KotID.ToString();
                txtCreationDate.Text = voucher.CreationDate.ToString("HH:mm dd-MMM-yyyy");
                txtDate.Text = voucher.Date.ToString("HH:mm dd-MMM-yyyy");
                txtLastEditDate.Text = voucher.LastEditDate.ToString("HH:mm dd-MMM-yyyy");
                btnCustomer.Text = voucher.Customer.Name;
                txtTableID.Text = voucher.Table.Name;
                txtPax.Text = voucher.Pax.ToString();
            }
        }

        public BindingSource BindingSource
        {
            get { return bindingSource; }
        }

        public void CloseWindow()
        {
            Close();
        }

        #endregion

        private void SalesForm_KeyDown(object sender, KeyEventArgs e)
        {
            switch (e.KeyCode)
            {
                case Keys.F2:
                    {
                        btnQuantity_Click(sender, new EventArgs());
                        break;
                    }
                case Keys.F3:
                    {
                        btnDiscount_Click(sender, new EventArgs());
                        break;
                    }
                case Keys.F4:
                    {
                        if (!e.Alt)
                            _billController.ShowCustomers(false);
                        break;
                    }
                case Keys.F7:
                    {
                        //using (var selectProduct = new SelectProduct(ProductBI.GetFilteredProducts, true))
                        //{
                        //    selectProduct.ShowDialog();
                        //    if (selectProduct.SelectedItem != null)
                        //        _billController.AddProduct(selectProduct.SelectedItem.ProductID);
                        //}
                        break;
                    }
                case Keys.F8:
                    {
                        _billController.LoadBill(null);
                        break;
                    }
                case Keys.F11:
                    {
                        btnPrintBill_Click(sender, e);
                        break;
                    }
                case Keys.F12:
                    {
                        btnPrintKot_Click(sender, e);
                        break;
                    }
                case Keys.Delete:
                    {
                        _billController.SetQuantity(-1, false);
                        //_billController.ProductRemove();
                        break;
                    }
                case Keys.Add:
                    {
                        _billController.SetQuantity(1, false);
                        break;
                    }
                case Keys.Subtract:
                    {
                        _billController.SetQuantity(-1, 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:
                    {
                        _billController.CancelBillChanges();
                        break;
                    }
            }
        }

        private void SalesForm_Load(object sender, EventArgs e)
        {
            using (var bis = new SettingBI())
            {
                var showSC = bis.Get(x => x.Name == "Service Charge Enabled").Details == "yes";
                txtServiceCharge.Visible = showSC;
                lblServiceCharge.Visible = showSC;
            }
            _billController.FormLoad();
            FormState = SaleFormState.Waiting;
        }

        private void btnCustomer_Click(object sender, EventArgs e)
        {
            _billController.ShowCustomers(false);
        }

        private void btnVoid_Click(object sender, EventArgs e)
        {
            try
            {
                _billController.VoidBill();
            }
            catch (PermissionException ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void btnPrice_Click(object sender, EventArgs e)
        {
            try
            {
                _billController.SetPrice();
            }
            catch (Exception ex)
            {
                if (!(ex is ValidationException) && !(ex is PermissionException))
                    throw;
            }
        }

        private void btnClear_Click(object sender, EventArgs e)
        {
            _billController.CancelBillChanges();
        }

        private void dgvProducts_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            var dgv = sender as DataGridView;
            var data = (KeyValuePair<BillItemKey, BillItemValue>)dgv.Rows[e.RowIndex].DataBoundItem;

            if (data.Key.BillItemType == BillItemType.Kot)
            {
                e.CellStyle.SelectionBackColor = Color.Blue;
                e.CellStyle.BackColor = Color.LightBlue;
            }
            else if (data.Value.inventory.Kot != null)
            {
                e.CellStyle.SelectionBackColor = Color.HotPink;
                e.CellStyle.BackColor = Color.LightPink;
            }
            else
            {
                e.CellStyle.SelectionBackColor = Color.Green;
                e.CellStyle.BackColor = Color.LightGreen;
            }
            if (dgv.Columns[e.ColumnIndex].Name.Equals("DisplayColumn"))
                e.Value = data.Value.Display;
            else if (dgv.Columns[e.ColumnIndex].Name.Equals("QuantityColumn"))
            {
                if (data.Key.BillItemType != BillItemType.Kot)
                    e.Value = data.Value.inventory.Quantity;
                else
                    e.Value = "";
            }
        }

        private void btnSettle_Click(object sender, EventArgs e)
        {
            _billController.SettleBill();
        }

        private void btnModifier_Click(object sender, EventArgs e)
        {
            _billController.ShowModifiers();
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {
            _billController.SetQuantity(-1, false);
        }

        private void btnMoveTable_Click(object sender, EventArgs e)
        {
            _billController.MoveTable();
        }

        private void btnMore_Click(object sender, EventArgs e)
        {
            var button = sender as Button;
            if (button == null)
                return;
            if (button.Text == "More")
                MoreButton(true);
            else if (button.Text == "Less")
                MoreButton(false);
            else
                throw new InvalidOperationException("Button State incorrect");
        }

        private void MoreButton(bool more)
        {
            btnMore.Text = more ? "Less" : "More";
            btnQuantity.Visible = !more;
            btnPrice.Visible = more;
            btnDelete.Visible = !more;
            btnDiscount.Visible = !more;
            btnModifier.Visible = !more;
            btnMoveTable.Visible = more;
            btnMoveKot.Visible = more;
            btnVoid.Visible = more;
            btnSplitBill.Visible = more;
        }

        private void btnMoveKot_Click(object sender, EventArgs e)
        {
            _billController.MoveKot();
        }

        #region Helper Functions

        public void ClearBill(BillDict bill)
        {
            txtBillID.Text = "";
            txtKotID.Text = "";
            txtCreationDate.Text = "";
            txtDate.Text = "";
            txtLastEditDate.Text = "";
            txtTableID.Text = "";
            txtPax.Text = "";
            txtGrossTax.Text = "0.00";
            txtDiscount.Text = "0.00";
            txtServiceCharge.Text = "0.00";
            txtGrossAmount.Text = "0.00";
            txtAmount.Text = "0.00";
            bindingSource.CurrencyManager.Position = 0; //Hack for Mono
            bindingSource.DataSource = bill;
            MoreButton(false);
            FormState = SaleFormState.Waiting;
        }

        public void ShowAmount(decimal discountAmount, decimal grossAmount, decimal serviceChargeAmount,
                               decimal taxAmount, decimal valueAmount, BillDict bill)
        {
            txtGrossTax.Text = string.Format("{0:#0.00}", taxAmount);
            txtDiscount.Text = string.Format("{0:#0.00}", discountAmount);
            txtServiceCharge.Text = string.Format("{0:#0.00}", serviceChargeAmount);
            txtGrossAmount.Text = string.Format("{0:#0.00}", grossAmount);
            txtAmount.Text = string.Format("{0:#0.00}", Math.Round(valueAmount));
            bindingSource.DataSource = bill.ToList();
            dgvProducts.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.DisplayedCells);
        }

        public SaleFormState FormState
        {
            set
            {
                flpGroup.Controls.Clear();
                flpMain.Controls.Clear();
                if (value == SaleFormState.Billing)
                    ControlFactory.GenerateGroups(ref flpGroup, new Point(75, 75), 0, Cache.ProductGroups(), productTypeButton_Click, productTypePage_Click);
                else
                    using (var bi = new FoodTableBI())
                        ControlFactory.GenerateTables(ref flpMain, new Point(75, 75), 0, bi.List(x => x.IsActive), tableButton_Click, tablePage_Click);

            }
        }
        private void productTypeButton_Click(object sender, EventArgs e)
        {
            var button = sender as Button;
            if (button == null)
                return;
            var item = button.Tag as ProductGroup;
            if (item == null)
                return;
            _currentProductGroup = item;
            ControlFactory.GenerateProducts(ref flpMain, new Point(75, 75), 0,
                                            item.Products, productButton_Click, productPage_Click);
        }

        private void productTypePage_Click(object sender, EventArgs e)
        {
            var button = sender as Button;
            if (button == null)
                return;
            var start = (int)button.Tag;
            if (start < 0)
                start = 0;
            ControlFactory.GenerateGroups(ref flpGroup, new Point(75, 75), start, Cache.ProductGroups(), productTypeButton_Click, productTypePage_Click);
        }

        private void productButton_Click(object sender, EventArgs e)
        {
            var button = sender as Button;
            if (button == null)
                return;
            var item = button.Tag as Product;
            if (item.IsNotAvailable)
                return;
            _billController.AddProduct(item);
        }

        private void productPage_Click(object sender, EventArgs e)
        {
            var button = sender as Button;
            if (button == null)
                return;
            var item = button.Tag as Product;
            var start = (int)button.Tag;
            if (start < 0)
                start = 0;
            ControlFactory.GenerateProducts(ref flpMain, new Point(75, 75), start, _currentProductGroup.Products, productButton_Click, productPage_Click);
        }

        private void tableButton_Click(object sender, EventArgs e)
        {
            var button = sender as Button;
            if (button == null)
                return;
            var item = button.Tag as FoodTable;
            var tableName = item.Name;
            _billController.LoadBill(tableName);
            FormState = SaleFormState.Billing;
        }

        private void tablePage_Click(object sender, EventArgs e)
        {
            var button = sender as Button;
            if (button == null)
                return;
            var start = (int)button.Tag;
            if (start < 0)
                start = 0;
            using (var bi = new FoodTableBI())
                ControlFactory.GenerateTables(ref flpMain, new Point(75, 75), start, bi.List(x => x.IsActive), tableButton_Click, tablePage_Click);
        }
        private void btnPrintBill_Click(object sender, EventArgs e)
        {
            _billController.SaveBill();
        }

        private void btnPrintKot_Click(object sender, EventArgs e)
        {
            _billController.SaveKot();
        }

        private void btnQuantity_Click(object sender, EventArgs e)
        {
            _billController.SetQuantity(0, true);
        }

        private void btnDiscount_Click(object sender, EventArgs e)
        {
            try
            {
                _billController.SetDiscount();
            }
            catch (Exception ex)
            {
                if (!(ex is ValidationException) && !(ex is PermissionException))
                    throw;
            }
        }

        #endregion

        private void btnSplitBill_Click(object sender, EventArgs e)
        {
            _billController.SplitBill();
        }
    }
}