using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Action_Tire_Payment_Processor
{
    public partial class CardInfoForm : Form
    {
        public string CardType;
        public string CardTypeGroup;
        public string TransactionType;
        public string CardHolder;

        public bool CardSwiped = false;
        public bool Searching = false;

        public CardInfoForm()
        {
            InitializeComponent();
            updatePanels();
        }

        private void btnOK_Click(object sender, EventArgs e)
        {
            if (TransactionType.Equals("sale") && !rbTTROA.Checked && tbOrderNumber.Text.Length != 9)
            {
                MessageBox.Show("An invalid Order # has been entered.");
                tbOrderNumber.Focus();
                return;
            }

            if (!TransactionType.Equals("refund"))
            {
                if (tbCardNumber.Text.Equals(""))
                {
                    MessageBox.Show("Invalid Card Number");
                    tbCardNumber.Focus();
                    return;
                }
                if (tbAmount.Text.Equals("") || tbAmount.Text.Equals(".00"))
                {
                    MessageBox.Show("Amount is required to process payment.");
                    tbAmount.Focus();
                    return;
                }
                if (tbFirstName.Text.Equals(""))
                {
                    MessageBox.Show("First Name is required to process payment.");
                    tbFirstName.Focus();
                    return;
                }
                if (tbLastName.Text.Equals(""))
                {
                    MessageBox.Show("Last Name is required to process payment.");
                    tbLastName.Focus();
                    return;
                }
                if (!CardSwiped && (tbAddress.Text.Equals("") || tbCity.Text.Equals("") || tbState.Text.Equals("") || tbZip.Text.Equals("")))
                {
                    MessageBox.Show("Address, City, State, and Zip are required to process manual payment.");
                    return;
                }
                if (tbState.Text.Length > 2)
                {
                    MessageBox.Show("Please use a two-letter abbreviation for the state.");
                    tbState.Focus();
                    return;
                }
                if (tbPhone.Text.Equals(""))
                {
                    MessageBox.Show("Phone # is required to process payment.");
                    tbPhone.Focus();
                    return;
                }
                if (tbExpirationDate.Text.Length < 5)
                {
                    MessageBox.Show("Invalid expiration date.");
                    tbExpirationDate.Focus();
                    return;
                }

                if (CardType == null)
                {
                    MessageBox.Show("Invalid card number.");
                    tbCardNumber.Focus();
                    return;
                }

                if (CardType.Equals("A") && tbCardNumber.Text.Length != 15)
                {
                    MessageBox.Show("Incorrect number of digits for American Express card type.");
                    tbCardNumber.Focus();
                    return;
                }
                if (CardTypeGroup.Equals("VMD") && tbCardNumber.Text.Length != 16)
                {
                    MessageBox.Show("Incorrect number of digits for " +
                        (CardType.Equals("V") ? "Visa" : "") +
                        (CardType.Equals("M") ? "MasterCard" : "") +
                        (CardType.Equals("D") ? "Discover" : "") +
                        " card type.");
                    tbCardNumber.Focus();
                    return;
                }
            }
            else // This is a refund
            {
                if (tbTransactionID.Text.Equals(""))
                {
                    MessageBox.Show("Transaction ID is required to process a refund.");
                    tbTransactionID.Focus();
                    return;
                }
            }
            this.DialogResult = DialogResult.OK;
            this.Close();
        }

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

        private bool invalidName = false;

        private void tbFirstName_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.ShiftKey || e.KeyCode == Keys.Back || e.KeyCode == Keys.Space || e.KeyCode == Keys.ControlKey || e.Alt) return; 
            if (!(e.KeyCode <= Keys.Z && e.KeyCode >= Keys.A) &&
                (e.KeyCode != Keys.Oemcomma) &&
                (e.KeyCode != Keys.Back) &&
                (e.KeyCode != Keys.Shift))
            {
                invalidName = true;
            }
        }

        private void tbFirstName_KeyPress(object sender, KeyPressEventArgs e)
        {
            e.Handled = invalidName;
            invalidName = false;
        }

        private void tbAmount_TextChanged(object sender, EventArgs e)
        {

        }
        
        private void rbTT_CheckedChanged(object sender, EventArgs e)
        {
            updatePanels();
        }

        public void updatePanels()
        {
            if (rbTTRefund.Checked)
            {
                TransactionType = "refund";
                pnlTransactionID.Visible = true;
                pnlPayment.Visible = false;
                this.Size = new Size(460, 300);
            }
            else
            {
                TransactionType = "sale";
                pnlTransactionID.Visible = false;
                pnlPayment.Visible = true;
                this.Size = new Size(460, 613);
            }
            if (rbTTROA.Checked)
            {
                lblOrderNumber.Text = "Customer #";
                lblOrderFormat.Text = "";
            }
            else
            {
                lblOrderNumber.Text = "Order #";
                lblOrderFormat.Text = "##-######";
            }
        }

        private void tbCardNumber_TextChanged(object sender, EventArgs e)
        {
            if (tbCardNumber.Text.Length < 1) return;
            char T = tbCardNumber.Text[0];
            if (T == '3') CardType = "A";
            if (T == '4') CardType = "V";
            if (T == '5') CardType = "M";
            if (T == '6') CardType = "D";

            if (CardType == "V" || CardType == "M" || CardType == "D") CardTypeGroup = "VMD";
            else CardTypeGroup = CardType;
        }

        private static string GetNumbers(string input)
        {
            return new string(input.Where(c => char.IsDigit(c)).ToArray());
        }

        private void tbAmount_Leave(object sender, EventArgs e)
        {
            if (tbAmount.Text.IndexOf('.') == -1) tbAmount.Text += ".00";
            if (tbAmount.Text.Length == 1 && tbAmount.Text[0] == '.') tbAmount.Text = "0" + tbAmount.Text;
            if (tbAmount.Text.Length >= 1 && tbAmount.Text[tbAmount.Text.Length - 1] == '.') tbAmount.Text += "00";
            if (tbAmount.Text.Length >= 3 && tbAmount.Text[tbAmount.Text.Length - 2] == '.') tbAmount.Text += "0";
        }

        private void tbCardNumber_Leave(object sender, EventArgs e)
        {
            tbCardNumber.Text = GetNumbers(tbCardNumber.Text);
        }

        private void tbExpirationDate_TextChanged(object sender, EventArgs e)
        {

        }
    }
}