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

namespace Action_Tire_Payment_Processor
{
    public partial class GiftCardRegistrationForm : Form
    {
        public GiftCardRegistrationForm()
        {
            InitializeComponent();
        }

        private void btnOK_Click(object sender, EventArgs e)
        {
            int GiftCardNumber = 0;
            int GiftCardNumberTo = 0;
            float CardAmount = 0.00f;

            try
            {
                GiftCardNumber = int.Parse(tbGiftCardNumber.Text);
            }
            catch (Exception ex)
            {
                MessageBox.Show("An invalid Gift Card # has been entered.");
                tbGiftCardNumber.Focus();
                return;
            }
            try
            {
                if (!tbGiftCardNumberEnd.Text.Trim().Equals(""))
                {
                    GiftCardNumberTo = int.Parse(tbGiftCardNumberEnd.Text);
                }
                else
                {
                    GiftCardNumberTo = GiftCardNumber;
                }
                if (GiftCardNumber > GiftCardNumberTo) throw new Exception("Invalid Card Number Range");
            }
            catch
            {
                MessageBox.Show("An invalid Card # range has been entered.");
                tbGiftCardNumberEnd.Focus();
                return;
            }
            try
            {
                CardAmount = float.Parse(tbAmount.Text);
                if (CardAmount <= 0f) throw new Exception("Bad Amount");
            }
            catch
            {
                MessageBox.Show("An invalid $ amount has been entered.");
                tbAmount.Focus();
                return;
            }

            string query = "SELECT * FROM Gift_Card_Registry WHERE CardNbr >= @CARDNUMBER AND CardNbr <= @CARDNUMBERTO";
            SqlCommand cmd = new SqlCommand(query, Database.sql);
            cmd.Parameters.AddWithValue("@CARDNUMBER", GiftCardNumber);
            cmd.Parameters.AddWithValue("@CARDNUMBERTO", GiftCardNumberTo);
            DataTable results = Database.Query(cmd);

            if (results.Rows.Count == 1)
            {
                MessageBox.Show("Card #" + GiftCardNumber + " is already registered with a balance of $" + results.Rows[0]["Balance"]);
                return;
            }
            if (results.Rows.Count > 1)
            {
                string cards = "There are "+results.Rows.Count+" existing cards within the specified range.\nPlease see the list of the duplicates below and refine the Card # range so that it does not include any of the existing cards.\n";
                foreach (DataRow r in results.Rows)
                {
                    cards += r["CardNbr"].ToString();
                    if (r != results.Rows[results.Rows.Count-1])
                    {
                        cards += ", ";
                    }
                }
                MessageBox.Show(cards);
                return;
            }

            IEnumerable<int> cardNumbers = Enumerable.Range(GiftCardNumber, (GiftCardNumberTo-GiftCardNumber)+1);

            string msg = "";

            foreach (int c in cardNumbers)
            {
                query = "INSERT INTO Gift_Card_Registry (CardNbr, CardType, OriginalAmount, Balance) VALUES (@CardNumber, @CardType, @OriginalAmount, @Balance)";
                cmd = new SqlCommand(query, Database.sql);
                cmd.Parameters.AddWithValue("@CardNumber", c);
                cmd.Parameters.AddWithValue("@CardType", "Gift Card");
                cmd.Parameters.AddWithValue("@OriginalAmount", CardAmount);
                cmd.Parameters.AddWithValue("@Balance", CardAmount);
                Database.NonQuery(cmd);

                query = "INSERT INTO Gift_Card_Transactions (StoreID, TransType, Amount, CardNbr, CardType, DateCreated, CreatedBy) VALUES " +
                    "(@StoreID, @TransType, @Amount, @CardNbr, @CardType, GetDate(), @CreatedBy)";
                cmd = new SqlCommand(query, Database.sql);
                cmd.Parameters.AddWithValue("@StoreID", Settings.GetOption("STORE"));
                cmd.Parameters.AddWithValue("@TransType", "load");
                cmd.Parameters.AddWithValue("@Amount", CardAmount);
                cmd.Parameters.AddWithValue("@CardNbr", c);
                cmd.Parameters.AddWithValue("@CardType", "Gift Card");
                cmd.Parameters.AddWithValue("@CreatedBy", Environment.UserName);
                Database.NonQuery(cmd);

                msg += "Gift Card #" + c + " registered with a balance of $" + String.Format("{0:C}", CardAmount) + "\n";
            }

            MessageBox.Show(msg);

            this.DialogResult = DialogResult.OK;
            this.Close();
        }

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

        private void tbAmount_TextChanged(object sender, EventArgs e)
        {

        }

        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";
        }
    }
}