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 Übungen_LF6_WinFormanwendung
{
    public partial class Klassenarbeit_030517_AlexanderDegen : Form
    {
        int anzahlDatensätze = 0;
        string fileName;

        //Datenspeicher
        List<OrderDetails> Bestellungen = new List<OrderDetails>();
        List<string> VorhandeneOrderIDs = new List<string>();

        public Klassenarbeit_030517_AlexanderDegen()
        {
            InitializeComponent();
        }

        private void button_ende_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        
        private void CSVLesen_Click(object sender, EventArgs e)
        {
            openFileDialog1.Filter = "CSV-Datei (*.csv)|*.csv|Textdatei (*.txt)|*.txt|Alle Dateien(*.*)|*.*";

            if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                
                fileName = openFileDialog1.FileName;
                textBoxFileName.Text = openFileDialog1.FileName;
                               
            }

        }

        private void buttonAnzeige_Click(object sender, EventArgs e)
        {
            
            try
            {

                //Dateileseroutine 
                StreamReader tr = new StreamReader(fileName);

                // Header überlesen
                string zeile = tr.ReadLine();
                String[] CSVHeader = zeile.Split(';');
                //Header Füllen
                textBox_Header_OrderID.Text = CSVHeader[0];
                textBox_Header_ProductID.Text = CSVHeader[1];
                textBox_Header_UnitPrize.Text = CSVHeader[2];
                textBox_Header_Quantity.Text = CSVHeader[3];
                textBox_Header_Discount.Text = CSVHeader[4];

                while (!tr.EndOfStream)
                {
                    zeile = "";
                    zeile = tr.ReadLine();
                    string[] CSVREADLINE = zeile.Split(';');
                    OrderDetails obj = new OrderDetails(CSVREADLINE);
                    
                    if(!VorhandeneOrderIDs.Contains(obj.ORDERID))
                    {
                        VorhandeneOrderIDs.Add(obj.ORDERID);
                    }                    

                    anzahlDatensätze += 1;
                    Bestellungen.Add(obj);
                    //Listboxen füllen
                    listBoxOrderID.Items.Add(CSVREADLINE[0]);
                    listBoxProductID.Items.Add(CSVREADLINE[1]);
                    listBox_UnitPrize.Items.Add(CSVREADLINE[2]);
                    listBox_Quantity.Items.Add(CSVREADLINE[3]);
                    listBox_Discount.Items.Add(CSVREADLINE[4]);
                }

                // close the stream
                tr.Close();

            }
            catch (Exception ex)
            {

                Console.WriteLine("Fehler: {0}", ex.ToString());
            }

           
        
    }

        private void button_GesUmsatz_Click(object sender, EventArgs e)
        {
            double gesUmsatz = 0f;
            foreach(OrderDetails obj in Bestellungen)
            {
                gesUmsatz += Convert.ToDouble(obj.UNITPRIZE) * Convert.ToDouble(obj.QUANTITY);
            }
            textBox_GesUmsatz.Text = gesUmsatz.ToString();
        }

        private void button_SalePerProduct_Click(object sender, EventArgs e)
        {
            
        }

        private void button_RechnungProOrder_Click(object sender, EventArgs e)
        {

        }

        private void button_UmsatzNetto_Click(object sender, EventArgs e)
        {
            double nettoUmsatz = 0f;
            double bruttoUmsatz = 0f;
            foreach (OrderDetails obj in Bestellungen)
            {
                bruttoUmsatz = Convert.ToDouble(obj.UNITPRIZE) * Convert.ToDouble(obj.QUANTITY);
                nettoUmsatz += bruttoUmsatz - bruttoUmsatz * Convert.ToDouble(obj.DISCOUNT);
            }
            nettoUmsatz = Math.Round(nettoUmsatz, 2);
            textBox_UmsatzNetto.Text = nettoUmsatz.ToString();
        }

        private void button_SummeSales_Click(object sender, EventArgs e)
        {
            int summeSales = 0;

            foreach (OrderDetails obj in Bestellungen)
            {
                summeSales += Convert.ToInt32(obj.QUANTITY);
            }

            textBox_SummeSales.Text = summeSales.ToString();
            
    }

        private void button_Summe_Bestellung_Click(object sender, EventArgs e)
        {
            int anzahlBestellungen = 0;
            foreach (OrderDetails obj in Bestellungen)
            {
                if(VorhandeneOrderIDs.Contains(obj.ORDERID))
                anzahlBestellungen += Convert.ToInt32(obj.QUANTITY);
            }

            textBox_Summe_Bestellung.Text = anzahlBestellungen.ToString();
        }

        
    }
    
}