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

namespace Multi_Demo
{
    public partial class mainForm : Form
    {
        public struct Invoices
        {
            public int number;
            public DateTime date;
            public int customerNumber;
            public double invoiceAmount;
            public int Aging;
        }

        public static Invoices[] theInvoice = new Invoices[100];
        public static int arraySize = 0;
        public mainForm()
        {
            InitializeComponent();
        }

        private void loadButton_Click(object sender, EventArgs e)
        {
            openDialog.ShowDialog();

            String fileName = "";

            try
            {
                fileName = openDialog.FileName;
            }
            catch { }

            if (File.Exists(fileName) && fileName.Contains(".csv") )
            {
                loadCSV(fileName);

                showButton.Enabled = true;

            }
            else
            {
                MessageBox.Show("Invalid Filename...");
            }

        }

        public static void loadCSV(String theFileName)
        {
            StreamReader inFile = new StreamReader(theFileName);
            int currentIndex = 0;
            bool isOk = true;
            while (!inFile.EndOfStream)
            {
                String aLine = inFile.ReadLine();
                String[] theInvoices = aLine.Split(',');
                Invoices aInvoice;

                isOk = Int32.TryParse(theInvoices[0], out aInvoice.number);
                if (isOk == false)
                {
                    MessageBox.Show("Invalid Invoice Number" + theInvoices[0] + " Line" + currentIndex+1);
                }

                isOk = DateTime.TryParse(theInvoices[1], out aInvoice.date);
                if (isOk == false)
                {
                    MessageBox.Show("Invalide Date" + theInvoices[1] + " Line" + currentIndex + 1);
                }

                isOk = Int32.TryParse(theInvoices[2], out aInvoice.customerNumber);
                if (isOk == false)
                {
                    MessageBox.Show("Invalid Customer Number" + theInvoices[2] + " Line" + currentIndex + 1);
                }

                isOk = Double.TryParse(theInvoices[3], out aInvoice.invoiceAmount);
                if (isOk == false)
                {
                    MessageBox.Show("Invalid Amount" + theInvoices[3] + " Line" + currentIndex + 1);
                }

                isOk = Int32.TryParse(theInvoices[4], out aInvoice.Aging);
                if (isOk == false)
                {
                    MessageBox.Show("Invalid Aging" + theInvoices[4] + " Line" + currentIndex + 1);
                }

                theInvoice[currentIndex] = aInvoice;
                currentIndex++;
            }
            inFile.Close();

            arraySize = currentIndex;
        }

        private void showButton_Click(object sender, EventArgs e)
        {
            detailedForm details = new detailedForm();
            details.Show();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Environment.Exit(0);
        }
    }
}