using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Windows.Forms;
using Tanshu.Accounts.Helpers;
using Tanshu.Accounts.Contracts;
using Tanshu.Accounts.Repository;
using Tanshu.Accounts.Entities;
using Tanshu.Accounts.Entities.Auth;

namespace Tanshu.Accounts.PointOfSale
{
    public partial class ProductsForm : Form
    {
        bool createOnly = false;
        IList<Product> productList = new List<Product>();

        #region Form Load
        public ProductsForm()
        {
            InitializeComponent();
        }

        private void Products_Load(object sender, EventArgs e)
        {
            productList = ProductBI.GetProducts();
            bsProducts.DataSource = productList;
            FillCombos();
            bsProducts.MoveFirst();
        }

        private void FillCombos()
        {
            bsProductGroups.DataSource = new ProductGroupBI().GetProductGroups();
            bsTax.DataSource = TaxBI.GetTaxes();
        }
        #endregion

        #region Buttons
        private void btnAdd_Click(object sender, EventArgs e)
        {
            if (btnAdd.Text == "&Add")
            {
                bsProducts.AddNew();
                LockControls(true);
                this.lblNavLocation.Text = "Add New";
                txtName.Select();
            }
            else
            {
                if (!ValidateValues())
                {
                    MessageBox.Show("Missing Information: Please check the form.");
                    bsProducts.CancelEdit();
                }
                else
                {
                    bsProducts.EndEdit();
                    Save(true);
                    if (createOnly)
                        btnExit_Click(sender, e);
                    else
                    {
                        productList = ProductBI.GetProducts();
                        bsProducts.DataSource = productList;
                        LockControls(false);
                    }
                }
            }
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {
            if (btnDelete.Text == "&Delete")
            {
                if (productList.Count() > 0)
                {
                    if (MessageBox.Show("Are you sure?", "Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.Yes)
                    {
                        if (ProductBI.Delete(productList.Single(p => p.Code == Convert.ToInt32(txtUniqueID.Text)).ProductID))
                        {
                            productList = ProductBI.GetProducts();
                            btnNavFirst_Click(sender, e);
                        }
                    }
                }
            }

            else
            {
                LockControls(false);
                bsProducts.CancelEdit();
            }

        }

        private void btnUpdate_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("Are you sure?", "Update", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.Yes)
            {
                Save(false);
                bsProducts.ResetItem(bsProducts.Position);
            }
        }
        #endregion

        #region Add / Edit / Delete
        private bool ValidateValues()
        {
            if (txtName.Text.Trim().Length == 0)
                return false;
            if (cmbProductGroup.SelectedValue == null)
                return false;
            if (cmbSalesTax.SelectedValue == null)
                return false;
            return true;
        }

        private bool Save(bool addNew)
        {
            #region Setup Products
            Product product = new Product();
            if (!addNew)
                product = (Product)bsProducts.Current;
            product.Name = txtName.Text;
            product.Units = txtUnits.Text;
            product.ProductGroup = new ProductGroupBI().GetProductGroup((int)cmbProductGroup.SelectedValue);
            product.SalePrice = Convert.ToDecimal(txtSalePrice.Text);
            product.Discontinued = chkDiscontinued.Checked;
            product.Tax = new Tax();
            if (addNew)
                ProductBI.Insert(product);
            else
                ProductBI.Update(product);

            return true;
            #endregion
        }
        #endregion

        private void btnExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void LockControls(bool enable)
        {
            if (enable)
            {
                btnAdd.Text = "&Save";
                btnDelete.Text = "&Cancel";
            }
            else
            {
                btnAdd.Text = "&Add";
                btnDelete.Text = "&Delete";
            }
            btnExit.Enabled = !enable;
            btnLast.Enabled = !enable;
            btnNavPrev.Enabled = !enable;
            btnNavNext.Enabled = !enable;
            btnUpdate.Enabled = !enable;
            btnNavFirst.Enabled = !enable;
        }

        private void btnAddCategory_Click(object sender, EventArgs e)
        {
            ProductTypes frm = new ProductTypes();
            frm.ShowDialog();
            frm.Dispose();
            FillCombos();
            cmbProductGroup.SelectedIndex = 0;
        }


        #region Move Buttons
        private void btnNavFirst_Click(object sender, EventArgs e)
        {
            this.bsProducts.MoveFirst();
        }
        private void btnNavPrev_Click(object sender, EventArgs e)
        {
            this.bsProducts.MovePrevious();
        }
        private void btnNavNext_Click(object sender, EventArgs e)
        {
            this.bsProducts.MoveNext();
        }
        private void btnLast_Click(object sender, EventArgs e)
        {
            this.bsProducts.MoveLast();
        }
        private void lblNavLocation_Click(object sender, EventArgs e)
        {
            using (SelectProduct selectProduct = new SelectProduct(ProductBI.GetFilteredProducts, true))
            {
                selectProduct.ShowDialog();
                if (selectProduct.SelectedItem != null)
                {
                    bsProducts.Position = GetPosition(productList, selectProduct.SelectedItem.ProductID);
                }
            }
        }
        #endregion
        #region Binding Source Events
        private void bsProducts_AddingNew(object sender, AddingNewEventArgs e)
        {
            e.NewObject = new Product();
        }

        private void bsProducts_PositionChanged(object sender, EventArgs e)
        {
            this.lblNavLocation.Text = string.Format("{0} of {1}", bsProducts.Position + 1, bsProducts.Count);
        }
        #endregion
        private int GetPosition(IList<Product> list, int id)
        {
            for (int i = 0; i < list.Count; i++)
            {
                if (list[i].ProductID == id)
                    return i;
            }
            return 0;

        }
    }
}