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.BI;

namespace Tanshu.Accounts.PointOfSale
{
    public partial class ProductsForm : Form
    {
        bool createOnly = false;
        List<ProductDisplayBO> productList = new List<ProductDisplayBO>();
        Guid? _productID;
        ProductBO product;
        #region Form Load
        public ProductsForm(Guid? productID)
        {
            _productID = productID;
            InitializeComponent();
        }

        private void Products_Load(object sender, EventArgs e)
        {
            FillCombos();
            if (_productID.HasValue)
            {
                using (var connection = new SqlDAO.SqlConnectionDAO())
                {
                    using (var dao = new SqlDAO.ProductDAO(connection))
                    {
                        product = dao.GetProduct(_productID.Value);
                    }
                }

                txtUniqueID.Text = product.Code.ToString();
                txtName.Text = product.Name;
                cmbUnits.SelectedItem = product.Units;
                cmbProductGroups.SelectedValue = product.ProductGroupID;
                txtSalePrice.Text = product.SalePrice.ToString();
                cmbVat.SelectedValue = product.VatID;
                cmbServiceTax.SelectedValue = product.ServiceTaxID;
                chkDiscontinued.Checked = product.Discontinued;
                btnSave.Text = "&Update";
                btnDelete.Enabled = true;
            }
            else
            {
                btnSave.Text = "&Save";
                btnDelete.Enabled = false;
            }
        }

        private void FillCombos()
        {
            string[] units = { "Can", "Gms", "Rs.", "Piece", "Liter", "Plate", "Kg.", "Bottle", "Pack" };
            bsUnits.DataSource = units;
            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.ProductDAO(connection))
                {
                    bsProductGroups.DataSource = dao.GetProductGroups();
                    bsVat.DataSource = dao.GetTaxes();
                    bsServiceTax.DataSource = dao.GetTaxes();
                }
            }
        }
        #endregion

        #region Buttons
        private void btnDelete_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("Are you sure?", "Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) != DialogResult.Yes)
                return;


            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.ProductDAO(connection))
                {
                    if (dao.Delete(product.ProductID))
                    {
                        btnCancel_Click(sender, e);
                    }
                }
            }
        }

        private void btnUpdate_Click(object sender, EventArgs e)
        {
            if (!ValidateValues())
            {
                MessageBox.Show("Missing Information: Please check the form.");
                txtName.Focus();
            }
            else if (MessageBox.Show("Are you sure?", "Update", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.Yes)
            {
                Save();
                btnCancel_Click(sender, e);
            }
        }
        #endregion

        #region Add / Edit / Delete
        private bool ValidateValues()
        {
            bool returnType;
            returnType = (bool)(txtName.Text.Trim().Length > 0 ? true : false);
            returnType = (cmbVat.SelectedValue == null ? false : true);
            returnType = (cmbServiceTax.SelectedValue == null ? false : true);
            return returnType;
        }

        private void Save()
        {
            if (product == null)
                product = new ProductBO();
            product.Name = txtName.Text;
            product.Units = cmbUnits.Text;
            product.ProductGroupID = new Guid(cmbProductGroups.SelectedValue.ToString());
            product.SalePrice = Convert.ToDecimal(txtSalePrice.Text);
            if (cmbServiceTax.SelectedValue != null)
                product.ServiceTaxID = new Guid(cmbServiceTax.SelectedValue.ToString());
            product.Discontinued = chkDiscontinued.Checked;
            product.VatID = new Guid(cmbVat.SelectedValue.ToString());
            using (var connection = new SqlDAO.SqlConnectionDAO())
            {
                using (var dao = new SqlDAO.ProductDAO(connection))
                {
                    if (product.ProductID == new Guid())
                        dao.Insert(product);
                    else
                        dao.Update(product);
                }
            } 
        }
        #endregion

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

        private void btnAddCategory_Click(object sender, EventArgs e)
        {
            using (var frm = new ProductGroups())
            {
                frm.ShowDialog();
            }
            FillCombos();
            cmbProductGroups.SelectedIndex = 0;
        }
        public ProductBO Product
        {
            get { return null; }
        }
    }
}