using BarcodeLib;
using BiskLog_Point_Of_Sale.Classes;
using BiskLog_Point_Of_Sale.Company_Setup;
using BiskLog_Point_Of_Sale.Dialogs;
using BiskLog_Point_Of_Sale.Multiple_Login;
using BiskLog_Point_Of_Sale.Properties;
using Microsoft.Reporting.WinForms;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Point_Of_Sale_Managment
{
    public partial class ReceiptModule : Form
    {
        SqlConnection cn;
        SqlCommand cm;
        SqlDataReader dr;
        DatabaseConn conn = new DatabaseConn();
        bool soldToCustomer = false;
        public static List<ReceiptObject> receiptClasses = new List<ReceiptObject>();
        public static List<bottom> receiptClasses2 = new List<bottom>();
        string printLocation = "";
        string printerReceiptDefault = Settings.Default.ReceiptPrinter;
        private decimal m_balance, m_tendered, m_vat = 0;
        private string receiptID;
        public ReceiptModule(string receiptID = null)
        {
            InitializeComponent();
            cn = new SqlConnection(conn.MyConnection());
            holding.Left = (ClientSize.Width - holding.Width) / 2;
            if (!String.IsNullOrEmpty(receiptID))
                this.receiptID = receiptID;
        }

        private async void SaleCancellation_Load(object sender, EventArgs e)
        {
            if (!String.IsNullOrEmpty(receiptID))
            {
                textBox1.Text = receiptID;
                holding.Visible = true;
                await getReceipt(textBox1.Text);
                holding.Visible = false;
            }

        }
        private void SaleCancellation_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Escape)
            {
                this.Close();
            }
        }
        private async void TextBox1_TextChanged(object sender, EventArgs e)
        {
            holding.Visible = true;
            await getReceipt(textBox1.Text);
            holding.Visible = false;
        }
        public void cancelSales(string transactionKey)
        {
            SqlTransaction transaction;
            cn.Open();
            transaction = cn.BeginTransaction();
            try
            {
                cm = new SqlCommand("Update tblCart set status = @status where branchID = @branch and transno = @transno", cn);
                cm.Parameters.AddWithValue("@status", "CANCELLED");
                cm.Parameters.AddWithValue("@transno", transactionKey);
                cm.Parameters.AddWithValue("@branch", Settings.Default.BranchID);
                cm.Transaction = transaction;
                cm.ExecuteNonQuery();

                cm = new SqlCommand("Insert into tblCancelledTransactions (transno,dateCancelled,cancelledBy,branchID,countID) " +
                    "values (@transno,@dateCancelled,@cancelledBy,@branchID,@countID)", cn);
                cm.Parameters.AddWithValue("@dateCancelled", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"));
                cm.Parameters.AddWithValue("@transno", transactionKey);
                cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                cm.Parameters.AddWithValue("@cancelledBy", MainLogin.login_user);
                cm.Parameters.AddWithValue("@countID", transactionKey + Settings.Default.BranchID + DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                cm.Transaction = transaction;
                cm.ExecuteNonQuery();

                if (soldToCustomer)
                {
                    cm = new SqlCommand("Declare @debit decimal(19,2) = Case when (Select paid from CreditPurchases where receiptID = @transaction and branchID = @branchID) is not null then " +
                        "(Select paid from CreditPurchases where receiptID = @transaction and branchID = @branchID) else " +
                        "(Select SUM(total) from tblCart where transno = @transaction and branchID = @branchID) end " +
                        "Declare @customerID varchar(50) = (Select customerID from tblCustomerPurchases where transactionID = @transaction and branchID = @branchID) " +

                        "Declare @total decimal(19,2) = Case when (Select SUM(debit - credit) from CustomerAccounts where branchID = @branchID " +
                        "and customerID = @customerID) is null then 0 else (Select SUM(debit - credit) from CustomerAccounts where branchID = @branchID and customerID = @customerID) end " +
                        "set @total = (@total + @debit) - @credit " +
                        "Insert into CustomerAccounts(customerID, transactionID, date, debit, credit, balance, comments, branchID, countID) " +
                        "Values(@customerID, @transactionID, @date, @debit, @credit, @total, @comments, @branchID, @countID) " +
                        "Delete from tblCustomerPurchases where transactionID = @transaction and branchID = @branchID and customerID = @customerID", cn);
                    cm.Parameters.AddWithValue("@transaction", transactionKey);
                    cm.Parameters.AddWithValue("@transactionID", DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                    cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                    cm.Parameters.AddWithValue("@credit", 0);
                    cm.Parameters.AddWithValue("@comments", "ReceiptID with transaction ID : " + transactionKey + " was cancelled");
                    cm.Parameters.AddWithValue("@date", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"));
                    cm.Parameters.AddWithValue("@countID", transactionKey + Settings.Default.BranchID + DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                    cm.Transaction = transaction;
                    cm.ExecuteNonQuery();
                }

                foreach (DataGridViewRow row in dataGridView1.Rows)
                {
                    cm = new SqlCommand("Declare @baseunit varchar(150) = (Select baseUnit from tblProduct where pcode = @pcode) " +
                        "Declare @dquantity int = Case when @baseUnit = @unit then 1 * @quantity else " +
                        "(Select[quantity/unit] * @quantity as quantity from ProductAltUnit where pcode = @pcode and unitCode = @unit and branchID = @branchID) end " +
                        "Declare @newQuantity int = (Select MAX(quantity) + MIN(@dquantity) from tblInventory where pcode = @pcode and branchID = @branchID) " +
                        "Update tblInventory set quantity = @newQuantity where pcode = @pcode and branchID = @branchID " +
                        "Insert into tblInventoryEntries(pcode, quantity, date, countID, branchID) values (@pcode, @newQuantity, @date, @countID, @branchID)", cn);
                    cm.Parameters.AddWithValue("@quantity", row.Cells[3].Value.ToString());
                    cm.Parameters.AddWithValue("@unit", row.Cells[7].Value.ToString());
                    cm.Parameters.AddWithValue("@pcode", row.Cells[6].Value.ToString());
                    cm.Parameters.AddWithValue("@date", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"));
                    cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                    cm.Parameters.AddWithValue("@countID", transactionKey + Settings.Default.BranchID + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"));
                    cm.Transaction = transaction;
                    cm.ExecuteNonQuery();
                }

                transaction.Commit();
                cn.Close();
                string title = "Cancelled";
                string message = "Receipt with transaction number " + transactionKey + " has been cancelled successfully";
                NoAction noAction = new NoAction(title, message);
                noAction.BringToFront();
                noAction.ShowDialog();
            }
            catch (Exception ex)
            {
                transaction.Rollback();
                cn.Close();
                ErrorLogging.WriteToFile(ex.ToString());
            }
        }
        public async Task getReceipt(string key)
        {
            m_balance = 0;
            m_tendered = 0;
            m_vat = 0;
            int i = 1;
            try
            {
                dataGridView1.Invoke(new Action(() =>
                {
                    decimal total = (decimal)0.00;
                    decimal discount = (decimal)0.00;
                    decimal vat = (decimal)0.00;
                    dataGridView1.Rows.Clear();
                    cn.Open();
                    cm = new SqlCommand("Exec usp_fetch_receipts_by_transaction_number @BranchID = @branch,@TransNumber = @transno", cn);
                    cm.Parameters.AddWithValue("@transno", key);
                    cm.Parameters.AddWithValue("@branch", Settings.Default.BranchID);
                    dr = cm.ExecuteReader();
                    bool found = dr.HasRows;
                    while (dr.Read())
                    {
                        dataGridView1.Rows.Add(i, dr["Product"].ToString().ToUpper(), dr["Price"].ToString().ToUpper(), dr["quantity"].ToString(),
                            dr["unitName"].ToString(), dr["total"].ToString(), dr["ProductID"].ToString(), dr["unit"].ToString());
                        lblBalance.Text = $" {Settings.Default.currrencyCode} {dr["balance"].ToString()}";
                        lblTendered.Text = $" {Settings.Default.currrencyCode} {dr["tendered"].ToString()}";
                        lblDiscount.Text = $" {Settings.Default.currrencyCode} {dr["discount"].ToString()}";
                        lblDate.Text = dr["date"].ToString();
                        lblCashier.Text = dr["cashier"].ToString();
                        lblCustomer.Text = !String.IsNullOrEmpty(dr["name_key1"].ToString()) ? dr["name_key1"].ToString() : "Walk-In Purchase";
                        discount = decimal.Parse(dr["discount"].ToString());
                        vat = decimal.Parse(!String.IsNullOrEmpty(dr["vat"].ToString()) ? dr["vat"].ToString() : "0");
                        lblVAT.Text = $" {Settings.Default.currrencyCode} {vat}";
                        total += decimal.Parse(dr["total"].ToString());
                        m_balance = decimal.Parse(dr["balance"].ToString());
                        m_tendered = decimal.Parse(dr["tendered"].ToString());
                        m_vat = vat;
                        i++;
                    }
                    dr.Close();
                    cn.Close();
                    lblSubTotal.Text = $" {Settings.Default.currrencyCode} {total}";
                    lblBillTotal.Text = $" {Settings.Default.currrencyCode} {total - discount + vat}";
                    if (found)
                    {
                        detailsBox.Visible = true;
                        btnPrint.Enabled = true;
                        btnCancel.Enabled = true;
                    }
                    else
                    {
                        detailsBox.Visible = false;
                        btnPrint.Enabled = false;
                        btnCancel.Enabled = false;
                    }
                }));
            }
            catch (Exception ex)
            {
                ErrorLogging.WriteToFile(ex.ToString());
                cn.Close();
            }
        }
        private void TextBox1_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;
            }
        }
        private void BtnCancel_Click(object sender, EventArgs e)
        {
            string title = "Confirm Cancellation";
            string message = "Are you sure you would like to cancel this transaction ?";
            Confirmation confirmation = new Confirmation(title, message);
            confirmation.BringToFront();
            confirmation.ShowDialog();
            if (confirmation.DialogResult == DialogResult.Yes)
            {
                if (Settings.Default.cancellationConfirmation)
                {
                    Prompt promptCancel = new Prompt();
                    promptCancel.BringToFront();
                    promptCancel.ShowDialog();
                    if ((promptCancel.DialogResult == DialogResult.OK) && (promptCancel.confirmed))
                    {
                        cancelSales(textBox1.Text);
                        ClearModule();
                    }
                }
                else
                {
                    cancelSales(textBox1.Text);
                    ClearModule();
                }
            }
        }
        private void ClearModule()
        {
            dataGridView1.Rows.Clear();
            textBox1.Text = "";
            lblBalance.Text = "";
            lblTendered.Text = "";
            lblDiscount.Text = "";
            lblDate.Text = "";
            lblCashier.Text = "";
            lblCustomer.Text = "";

            lblVAT.Text = "";
            lblSubTotal.Text = "";
            lblBillTotal.Text = "";
            detailsBox.Visible = false;
            btnPrint.Enabled = false;
            btnCancel.Enabled = false;
        }
        public Image getBarcodeImage(string Bcode)
        {
            Barcode barcodeAPI = new Barcode();
            Color foreColor = Color.Black;
            Color backColor = Color.Transparent;
            return barcodeAPI.Encode(TYPE.UPCA, Bcode, foreColor, backColor, 290, 120);
        }
        private async void btnPrint_Click(object sender, EventArgs e)
        {
            holding.Visible = true;
            Task task = new Task<int>(() =>
            {
                PreparePrint();
                return 1;
            });
            task.Start();
            await task;
            holding.Visible = false;
        }
        private async Task PreparePrint()
        {
            try
            {
                textBox1.Invoke(new Action(() =>
                {
                    receiptClasses.Clear();
                    receiptClasses2.Clear();
                    MemoryStream ms = new MemoryStream();
                    getBarcodeImage(textBox1.Text).Save(ms, ImageFormat.Png);
                    byte[] imageBytes = ms.ToArray();
                    string barcodeStringImage = Convert.ToBase64String(imageBytes);

                    bottom bottomReceipt = new bottom(lblVAT.Text, textBox1.Text, lblCashier.Text, m_balance, m_tendered, lblDiscount.Text, lblDate.Text,
                           lblSubTotal.Text, lblBillTotal.Text, Form1.bCompanyName, Form1.branchName, Form1.branchLocation, Form1.branchTel, Form1.tin, Form1.vatno,
                           barcodeStringImage);
                    receiptClasses2.Add(bottomReceipt);

                    foreach (DataGridViewRow row in dataGridView1.Rows)
                    {
                        ReceiptObject receipt = new ReceiptObject(row.Cells[1].Value.ToString(), decimal.Parse(row.Cells[2].Value.ToString()),
                            int.Parse(row.Cells[3].Value.ToString()), decimal.Parse(row.Cells[5].Value.ToString()));
                        receiptClasses.Add(receipt);
                    }

                    if (printerReceiptDefault == "Microsoft XPS Document Writer" || printerReceiptDefault == "Microsoft Print to PDF")
                    {
                        FolderBrowserDialog folder = new FolderBrowserDialog();
                        DialogResult result = folder.ShowDialog();
                        if (result == DialogResult.OK && !String.IsNullOrEmpty(folder.SelectedPath))
                        {
                            printLocation = folder.SelectedPath;
                            LocalReport report = new LocalReport();
                            string path = Path.GetDirectoryName(Application.ExecutablePath);
                            string fullpath = Path.GetDirectoryName(Application.ExecutablePath).Remove(path.Length - 10) +
                                @"\Receipt.rdlc";
                            report.ReportPath = fullpath;
                            report.DataSources.Add(new ReportDataSource("ReceiptReport", receiptClasses));
                            report.DataSources.Add(new ReportDataSource("ReceiptRest", receiptClasses2));
                            ReceiptConfig.PrintToPrinter(report, printLocation, printerReceiptDefault);
                        }
                    }
                    else
                    {
                        printLocation = "";
                        LocalReport report = new LocalReport();
                        string path = Path.GetDirectoryName(Application.ExecutablePath);
                        string fullpath = Path.GetDirectoryName(Application.ExecutablePath).Remove(path.Length - 10) +
                               @"\Receipt.rdlc";
                        report.ReportPath = fullpath;
                        report.DataSources.Add(new ReportDataSource("ReceiptReport", receiptClasses));
                        report.DataSources.Add(new ReportDataSource("ReceiptRest", receiptClasses2));
                        ReceiptConfig.PrintToPrinter(report, printLocation, printerReceiptDefault);
                    }
                }));
            }
            catch (Exception ex)
            {

            }
        }
    }
}