using System;
using System.Windows.Forms;
using Tanshu.Accounts.Repository;
using Tanshu.Accounts.Entities;
using System.Text.RegularExpressions;

namespace Tanshu.Accounts.PointOfSale
{
    public partial class ProductForm : Form
    {
        private Guid? _productID;
        public ProductForm(Guid? productID)
        {
            _productID = productID;
            InitializeComponent();
        }

        private void ProductForm_Load(object sender, EventArgs e)
        {
            FillCombos();
            using (var bis = new SettingBI())
                ShowServiceChargeControls(bis.Get(x => x.Name == "Service Charge Enabled").Details == "yes");

            if (_productID.HasValue)
            {
                Product product;
                using (var bi = new ProductBI())
                    product = bi.Get(x => x.ProductID == _productID.Value);
                txtName.Text = product.Name;
                txtUnits.Text = product.Units;
                txtPrice.Text = product.Price.ToString("#.##");
                chkHasHappyHour.Checked = product.HasHappyHour;
                cmbVat.SelectedValue = product.Vat.TaxID;
                cmbServiceTax.SelectedValue = product.ServiceTax.TaxID;
                txtServiceCharge.Text = product.ServiceCharge.ToString("#.##");
                chkIsActive.Checked = product.IsActive;
                chkIsScTaxable.Checked = product.IsScTaxable;
                chkIsNotAvailable.Checked = product.IsNotAvailable;
                cmbProductGroup.SelectedValue = product.ProductGroup.ProductGroupID;
            }
            else
            {
                txtName.Focus();
            }
        }

        private void ShowServiceChargeControls(bool enabled)
        {
            lblServiceCharge.Visible = enabled;
            txtServiceCharge.Visible = enabled;
            chkIsScTaxable.Visible = enabled;
        }
        private void FillCombos()
        {
            using (var bi = new ProductGroupBI())
                bsProductGroups.DataSource = bi.List();
            using (var bi = new TaxBI())
            {
                bsServiceTax.DataSource = bi.List();
                bsVat.DataSource = bi.List();
            }
        }

        private void btnAddCategory_Click(object sender, EventArgs e)
        {
            using (var frm = new ProductGroupListForm())
                frm.ShowDialog();
            FillCombos();
            cmbProductGroup.SelectedIndex = -1;
        }

        private void btnOk_Click(object sender, EventArgs e)
        {
            var product = new Product();
            if (_productID.HasValue)
                product.ProductID = _productID.Value;

            if (string.IsNullOrEmpty(txtName.Text.Trim()))
            {
                MessageBox.Show("Product name cannot be blank.");
                txtName.Focus();
                return;
            }
            product.Name = txtName.Text.Trim();
            product.Units = txtUnits.Text.Trim();

            if (string.IsNullOrEmpty(txtPrice.Text.Trim()))
                txtPrice.Text = "0";
            if (!Regex.IsMatch(txtPrice.Text, @"^\d*([.]\d{1,5})?$"))
            {
                MessageBox.Show("Price is not valid, it must be a decimal >= 0");
                txtPrice.Focus();
                return;
            }
            else
                product.Price = decimal.Parse(txtPrice.Text.Trim());

            product.HasHappyHour = chkHasHappyHour.Checked;

            // Tax
            if (cmbVat.SelectedItem == null)
            {
                MessageBox.Show("Please choose VAT");
                cmbVat.Focus();
                return;
            }
            product.Vat = (Tax)cmbVat.SelectedItem;

            if (cmbServiceTax.SelectedItem == null)
            {
                MessageBox.Show("Please choose Service Tax");
                cmbServiceTax.Focus();
                return;
            }
            product.ServiceTax = (Tax)cmbServiceTax.SelectedItem;

            if (string.IsNullOrEmpty(txtServiceCharge.Text.Trim()))
                txtServiceCharge.Text = "0";
            if (!Regex.IsMatch(txtServiceCharge.Text, @"^0*([.]\d{1,5})?$"))
            {
                MessageBox.Show("Service Charge is not valid, it must be a decimal >= 0 and < 1");
                txtServiceCharge.Focus();
                return;
            }
            else
                product.ServiceCharge = decimal.Parse(txtServiceCharge.Text.Trim());

            product.IsScTaxable = chkIsScTaxable.Checked;
            product.IsActive = chkIsActive.Checked;
            product.IsNotAvailable = chkIsNotAvailable.Checked;

            //Group
            if (cmbProductGroup.SelectedItem == null)
            {
                MessageBox.Show("Please choose Product Group");
                cmbProductGroup.Focus();
                return;
            } 
            product.ProductGroup = (ProductGroup)cmbProductGroup.SelectedItem;

            using (var bi = new ProductBI())
            {
                if (_productID.HasValue)
                    bi.Update(product);
                else
                    bi.Insert(product);
                bi.SaveChanges();
            }
            MessageBox.Show("Update / Save Successful");
            this.Close();
        }

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