Biskilog/BISKILOG POS PREMIUM/POSDialogs/CustomerSettlePayment .cs

using BiskLog_Point_Of_Sale.Multiple_Login;
using BiskLog_Point_Of_Sale.Properties;
using System;
using System.Data.SqlClient;
using System.Drawing;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Point_Of_Sale_Managment
{
    public partial class CustomerSettlePayment : Form
    {
        string currency;
        SalesPOS selling;
        decimal balponit, paymentponit, carryForward;
        public CustomerSettlePayment(SalesPOS sales, decimal carryForward)
        {
            InitializeComponent();
            currency = Settings.Default.currrencyCode + " ";
            selling = sales;
            this.carryForward = carryForward;
        }

        private void settlePayment_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Escape)
            {
                this.Close();
            }
        }
        private void button16_Click(object sender, EventArgs e)
        {
            payment.AppendText("1");
        }
        private void button17_Click(object sender, EventArgs e)
        {
            payment.AppendText("2");
        }
        private void button18_Click(object sender, EventArgs e)
        {
            payment.AppendText("3");
        }
        private void button19_Click(object sender, EventArgs e)
        {
            payment.AppendText(".");
        }
        private void button15_Click(object sender, EventArgs e)
        {
            payment.AppendText("0");
        }
        private void button11_Click(object sender, EventArgs e)
        {
            payment.Text = "";
        }
        private void button14_Click(object sender, EventArgs e)
        {
            payment.AppendText("6");
        }
        private void button13_Click(object sender, EventArgs e)
        {
            payment.AppendText("5");
        }
        private void button12_Click(object sender, EventArgs e)
        {
            payment.AppendText("4");
        }
        private void button10_Click(object sender, EventArgs e)
        {
            payment.AppendText("9");
        }
        private void button9_Click(object sender, EventArgs e)
        {
            payment.AppendText("8");
        }
        private void btnSave_Click(object sender, EventArgs e)
        {
            payment.AppendText("7");
        }
        private void settlePayment_Load(object sender, EventArgs e)
        {
            payment.Focus();
            if (carryForward > 0 && carryForward < SalesPOS.mainTotal)
            {
                cost.Text = currency + (SalesPOS.mainTotal);
                owe.Text = currency + (SalesPOS.mainTotal - carryForward);
            }
            else if(carryForward > 0 && carryForward > SalesPOS.mainTotal)
            {
                cost.Text = currency + (SalesPOS.mainTotal);
                owe.Text = currency + (0);
                bal.Text = currency + (carryForward - SalesPOS.mainTotal);
            }
            else
            {
                cost.Text = currency + SalesPOS.mainTotal.ToString();
                owe.Text = currency + SalesPOS.mainTotal.ToString();
            }
        }
        private void payment_TextChanged(object sender, EventArgs e)
        {
            if (!String.IsNullOrEmpty(payment.Text))
            {
                decimal amount = decimal.Parse(payment.Text);
                if (!String.IsNullOrEmpty(payment.Text))
                {
                    arrangement(amount);
                }
                else
                {
                    arrangement(decimal.Parse("0.00"));
                }
            }
            else
            {
                payment.Text = "0.00";
            }

        }
        public void arrangement(decimal payment)
        {
            decimal paid = 0;
            if (carryForward > 0)
            {
                paid = SalesPOS.mainTotal - payment - carryForward;
            }
            else
            {
                paid = SalesPOS.mainTotal - payment;
            }

            paymentponit = payment;

            if (paid < 0)
            {
                bal.Text = currency + (paid * -1).ToString();
                balponit = decimal.Parse((paid * -1).ToString());
                owe.Text = currency + 0.00;
            }
            else if (paid == 0)
            {
                bal.Text = currency + paid.ToString();
                balponit = decimal.Parse(paid.ToString());
                owe.Text = currency + 0.00;
            }
            else
            {
                owe.Text = currency + paid.ToString();
                bal.Text = currency + 0.00;
                balponit = decimal.Parse("00.00");
            }
        }
        private void payment_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 8)
            {
                //accepts backspace
            }
            else if ((e.KeyChar < 48) || (e.KeyChar > 57)) //ascii code 48-57 between 0-9
            {
                e.Handled = true;
            }
            else if (e.KeyChar == 46)
            {
                // accepts . character
            }
        }

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

        private void Close_MouseEnter(object sender, EventArgs e)
        {
            close.BackColor = Color.Crimson;
        }

        private void Close_MouseLeave(object sender, EventArgs e)
        {
            close.BackColor = Color.Transparent;
        }

        private async void Button21_Click(object sender, EventArgs e)
        {
            if (owe.Text.Equals(currency + 0.00))
            {
                Task<int> task = new Task<int>(() => selling.creditSale(0, paymentponit));
                task.Start();
                int result = await task;
                if (result == 1)
                {

                    string title = "Success";
                    string message = "Payment made successfully";
                    NoAction noAction = new NoAction(title, message);
                    noAction.BringToFront();
                    noAction.ShowDialog();
                    this.Close();
                }
                else
                {

                    string title = "Error Occurred";
                    string message = "Sorry an error occurred while making payment, please try again";
                    NoAction noAction = new NoAction(title, message);
                    noAction.BringToFront();
                    noAction.ShowDialog();
                }
            }
            else
            {
                string title = "Full amount not paid";
                string message = "Would you like to take the cash tendered and credit the arrears to the customer's account ?";
                Confirmation noAction = new Confirmation(title, message);
                noAction.BringToFront();
                noAction.ShowDialog();
                if (noAction.DialogResult == DialogResult.Yes)
                {

                    Task<int> task = new Task<int>(() => selling.creditSale(decimal.Parse(owe.Text.Substring(currency.Length)), paymentponit));
                    task.Start();
                    int result = await task;
                    if (result == 1)
                    {

                        string title1 = "Success";
                        string message1 = "Payment made successfully";
                        NoAction noAction1 = new NoAction(title1, message1);
                        noAction1.BringToFront();
                        noAction1.ShowDialog();
                        this.Close();
                    }
                    else
                    {

                        string title2 = "Error Occurred";
                        string message2 = "Sorry an error occurred while making payment, please try again";
                        NoAction noAction2 = new NoAction(title2, message2);
                        noAction2.BringToFront();
                        noAction2.ShowDialog();
                    }
                }
            }
        }
    }
}