using System;
using System.Collections.Generic;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using GCHR.Model.Konto;

namespace GCHR.Control.Printing
{
    public class PageElement : UserControl
    {
        private const int PageMargin = 75;
        private const int HeaderHeight = 25;
        private const int LineHeight = 20;
        private const int ColumnWidth1 = 75;
        private const int ColumnWidth2 = 350;
        private const int ColumnWidth3 = 100;
        private const int ColumnWidth4 = 100;

        private readonly int _currentRow;
        private readonly int _rows;
        private readonly List<HaendlerKonto> _konten;
        private readonly String _aktuellePeriode;
        private readonly String _altePeriode;

        public PageElement(int currentRow, int rows, List<HaendlerKonto> konten, String aktuellePeriode, String altePeriode)
        {
            //Console.WriteLine("Test");
            Margin = new Thickness(PageMargin);
            _currentRow = currentRow;
            _rows = rows;
            _konten = konten;
            _aktuellePeriode = aktuellePeriode;
            _altePeriode = altePeriode;
        }

        public static int RowsPerPage(double height)
        {
            return (int)Math.Floor((height - (2 * PageMargin) - HeaderHeight) / LineHeight);
        }

        private static FormattedText MakeText(string text, bool rechtsbündig)
        {
            if (rechtsbündig)
                return new FormattedText(text, CultureInfo.CurrentCulture,
                    FlowDirection.RightToLeft, new Typeface("Tahoma"), 10, Brushes.Black);
            return new FormattedText(text, CultureInfo.CurrentCulture,
                                     FlowDirection.LeftToRight, new Typeface("Tahoma"), 10, Brushes.Black);
        }

        protected override void OnRender(DrawingContext dc)
        {
            var curPoint = new Point(0, 0);

            dc.DrawText(MakeText("Kontonummer", false), curPoint);
            curPoint.X += ColumnWidth1;
            /*for (int i = 1; i < 4; i++)
            {
                dc.DrawText(MakeText("Column " + i), curPoint);
                curPoint.X += ColumnWidth;
            }*/
            dc.DrawText(MakeText("Beschriftung", false), curPoint);
            curPoint.X += ColumnWidth2;
            curPoint.X += ColumnWidth3;
            String temp = "Neuer Wert - " + _aktuellePeriode;
            dc.DrawText(MakeText(temp, true), curPoint);
            curPoint.X += ColumnWidth4;
            temp = "Vormonat - " + _altePeriode;
            dc.DrawText(MakeText(temp, true), curPoint);

            curPoint.X = 0;
            curPoint.Y += LineHeight;

            dc.DrawRectangle(Brushes.Black, null, new Rect(curPoint, new Size(Width, 2)));
            curPoint.Y += HeaderHeight - LineHeight;

            // var numberGen = new Random();
            for (var i = _currentRow; i < _currentRow + _rows; i++)
            {
                HaendlerKonto konto = _konten[i];
                //Console.WriteLine("Aktuell: " + konto.Kontonummer);
                //dc.DrawText(MakeText(i.ToString()), curPoint);
                dc.DrawText(MakeText(konto.Kontonummer, false), curPoint);
                curPoint.X += ColumnWidth1;
                dc.DrawText(MakeText(konto.Bezeichnung, false), curPoint);
                curPoint.X += ColumnWidth2;
                curPoint.X += ColumnWidth3;
                dc.DrawText(MakeText(konto.Soll.ToString("0.00"), true), curPoint);
                curPoint.X += ColumnWidth4;
                dc.DrawText(MakeText(konto.Haben.ToString("0.00"), true), curPoint);
                
                /*for (int j = 1; j < 4; j++)
                {
                    dc.DrawText(MakeText(numberGen.Next().ToString()), curPoint);
                    curPoint.X += ColumnWidth;
                }*/
                curPoint.Y += LineHeight;
                curPoint.X = 0;
            }
        }
    }
}