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

namespace Tanshu.Accounts.PointOfSale.Sales
{
    public partial class SalesForm : Form, ISaleForm
    {
        private readonly IDictionary<int, IList<Product>> _productDictionary;
        private readonly IList<ProductGroup> _productGroupList;
        private ProductGroup _currentProductGroup;
        public SalesForm(BillController billController)
        {
            InitializeComponent();
            _productDictionary = new Dictionary<int, IList<Product>>();

            this._billController = billController;
            billController.InitGui(this);
            using (var bi = new ProductGroupBI())
                _productGroupList = bi.List(x => x.Discontinued == false);
            using (var bi = new ProductBI())
                foreach (var item in _productGroupList)
                    _productDictionary.Add(item.ProductGroupID, bi.List(x => x.ProductGroup.ProductGroupID == item.ProductGroupID && x.Discontinued == false));
        }

        #region ISaleForm Members

        public void SetUserName(string name)
        {
            Text = name;
        }

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

        public void ShowInfo(string billID, string kotID, DateTime creationDate, DateTime date, DateTime lastEditDate,
                             string customer, string tableID, int waiterID, string waiter)
        {
            txtBillID.Text = billID;
            txtKotID.Text = kotID;
            txtCreationDate.Text = creationDate.ToString("HH:mm dd-MMM-yyyy");
            txtDate.Text = date.ToString("HH:mm dd-MMM-yyyy");
            txtLastEditDate.Text = lastEditDate.ToString("HH:mm dd-MMM-yyyy");
            btnCustomer.Text = customer;
            txtTableID.Text = tableID;
            btnWaiter.Tag = waiterID;
            btnWaiter.Text = string.Format("{0} - F5", waiter);
        }

        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.ShowCustomerList(false);
                        break;
                    }
                case Keys.F5:
                    {
                        btnWaiter_Click(sender, new EventArgs());
                        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)
        {
            _billController.FormLoad();
            FormState = SaleFormState.Waiting;
        }

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

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

        private void btnRate_Click(object sender, EventArgs e)
        {
            _billController.ChangeRate();
        }

        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 = dgv.Rows[e.RowIndex].DataBoundItem as BillItemValue;

            if (data.Tax == -1)
            {
                e.CellStyle.SelectionBackColor = Color.Blue;
                e.CellStyle.BackColor = Color.LightBlue;
            }
            else if (data.Printed)
            {
                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 (var selectWaiter = new SelectWaiter(WaiterBI.GetFilteredWaiters, true))
            {
                selectWaiter.waiterEvent += 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 = WaiterBI.GetWaiters()[0].WaiterID;
                }
            }
        }

        private Waiter selectWaiter_waiterEvent(object sender, WaiterEventArgs e)
        {
            Waiter waiter = e.Waiter;
            if (!Thread.CurrentPrincipal.IsInRole("Waiter/Master"))
                return waiter;

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

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

        private void btnModifier_Click(object sender, EventArgs e)
        {
            var item = _billController.CurrentProduct;
            if (item == null)
                return;

            int id;
            using (var bi = new ProductGroupBI())
                id = bi.GetProductGroupOfProduct(item.ProductID).ProductGroupID;
            _billController.ShowModifiers(id, item);
        }

        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.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;
            btnRate.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.MergeKot();
        }

        #region Helper Functions

        public void ClearBill(List<BillItemValue> bill)
        {
            txtBillID.Text = "";
            txtKotID.Text = "";
            txtCreationDate.Text = "";
            txtDate.Text = "";
            txtLastEditDate.Text = "";
            txtTableID.Text = "";
            btnWaiter.Text = "Waiter - F5";
            btnWaiter.Tag = null;
            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, List<BillItemValue> 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;
            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, _productGroupList, productTypeButton_Click);
                else
                    using (var bi = new FoodTableBI())
                        ControlFactory.GenerateTables(ref flpMain, new Point(75, 75), 0, bi.List(), tableButton_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.Name == "Previous" || item.Name == "Next")
            {
                int start = item.ProductGroupID;
                if (start < 0)
                    start = 0;
                ControlFactory.GenerateGroups(ref flpGroup, new Point(75, 75), start, _productGroupList, productTypeButton_Click);
            }
            else
            {
                _currentProductGroup = item;
                ControlFactory.GenerateProducts(ref flpMain, new Point(75, 75), 0,
                                                _productDictionary[item.ProductGroupID], productButton_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.Name == "Previous" || item.Name == "Next")
            {
                int start = item.ProductID;
                if (start < 0)
                    start = 0;
                ControlFactory.GenerateProducts(ref flpMain, new Point(75, 75), start, _productDictionary[_currentProductGroup.ProductGroupID], productButton_Click);
            }
            else
            {
                _billController.AddProduct(item);
            }
        }

        private void tableButton_Click(object sender, EventArgs e)
        {
            var button = sender as Button;
            if (button == null)
                return;
            var item = button.Tag as FoodTable;
            if (item.Name == "Previous" || item.Name == "Next")
            {
                var start = item.FoodTableID;
                if (start < 0)
                    start = 0;

                using (var bi = new FoodTableBI())
                    ControlFactory.GenerateTables(ref flpMain, new Point(75, 75), start, bi.List(), tableButton_Click);
            }
            else
            {
                var tableName = item.Name;
                _billController.LoadBill(tableName);
                txtTableID.Text = tableName;
                FormState = SaleFormState.Billing;
            }
        }

        private void btnPrintBill_Click(object sender, EventArgs e)
        {
            if (btnWaiter.Tag == null)
                btnWaiter.Tag = WaiterBI.GetWaiters()[0].WaiterID;
            _billController.SaveBill((int)btnWaiter.Tag, txtTableID.Text);

        }

        private void btnPrintKot_Click(object sender, EventArgs e)
        {
            if (btnWaiter.Tag == null)
                btnWaiter.Tag = WaiterBI.GetWaiters()[0].WaiterID;
            _billController.SaveKot((int)btnWaiter.Tag, txtTableID.Text);
        }

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

        private void btnDiscount_Click(object sender, EventArgs e)
        {
            _billController.ShowDiscount();
        }

        #endregion

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