using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;

namespace ChartSample
{
    public partial class Form1 : Form
    {
        public class SimpleCandleSeries
        {
            public string Name { get; set; }
            public List<SimpleCandle> Series { get; set; }
        }

        public class SimpleCandle
        {
            public decimal High { get; set; }
            public decimal Low { get; set; }
            public decimal Open { get; set; }
            public decimal Close { get; set; }
            public decimal Volume { get; set; }
            public DateTime dateTime { get; set; }
        }


        Random rnd = new Random();

        public Form1()
        {
            InitializeComponent();
            
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // Random candledata
            var data = new SimpleCandleSeries()
            {
                Name = "CandleData",
                Series = new List<SimpleCandle>()
            };

            decimal initopen = 10m;
            for (int i = 0; i < 120; i++)
            {
                if (i > 0) { initopen = data.Series[i - 1].Close; }
                int randompricechange = rnd.Next(-6, 8);
                data.Series.Add(new SimpleCandle() { dateTime = DateTime.Now.AddHours(i), Open = initopen, Close = initopen+ randompricechange, High = initopen+1, Low = initopen + randompricechange - 1, Volume = 1m });
            }

            //Paint candles
            CandleMain(data);

            //calc ema
            List<Skender.Stock.Indicators.Quote> CandleAsSkendersQuote = ConvertToSkendersQuote(data);
            List<Skender.Stock.Indicators.EmaResult> emaresult = Skender.Stock.Indicators.Indicator.GetEma(CandleAsSkendersQuote, 2).ToList();
            var decimals = emaresult.Select(f => f.Ema.GetValueOrDefault()).ToList();

            //paint ema
            PaintDecimalSeries("EMA ", decimals);
        }

        public List<Skender.Stock.Indicators.Quote> ConvertToSkendersQuote(SimpleCandleSeries simpleCandleSeries)
        {
            List<Skender.Stock.Indicators.Quote> quotes = new List<Skender.Stock.Indicators.Quote>();
            foreach (var item in simpleCandleSeries.Series)
            {
                quotes.Add(ConvertToSkendersQuote(item));
            }
            return quotes;
        }

        public Skender.Stock.Indicators.Quote ConvertToSkendersQuote(SimpleCandle simpleCandleSeries)
        {
            return new Skender.Stock.Indicators.Quote() { Close = simpleCandleSeries.Close, High = simpleCandleSeries.High, Date = simpleCandleSeries.dateTime, Low = simpleCandleSeries.Low, Open = simpleCandleSeries.Open, Volume = simpleCandleSeries.Volume };
        }

        public void CandleMain(SimpleCandleSeries simpleCandleSeries)
        {
            var find = chart1.Series.IndexOf(simpleCandleSeries.Name);
            if (find >= 0)
            {
                chart1.Series.RemoveAt(find);
            }

            chart1.Series.Add(simpleCandleSeries.Name);
            chart1.Series[simpleCandleSeries.Name].LegendText = simpleCandleSeries.Name;
            chart1.Series[simpleCandleSeries.Name].ChartType = SeriesChartType.Candlestick;
            chart1.Series[simpleCandleSeries.Name].XValueType = ChartValueType.String;
            chart1.Series[simpleCandleSeries.Name].YValueType = ChartValueType.Single;
            chart1.Series[simpleCandleSeries.Name].CustomProperties = "PriceDownColor=Green, PriceUpColor=Red";

            for (int i = 0; i < simpleCandleSeries.Series.Count; i++)
            {
                var ser = simpleCandleSeries.Series;
                chart1.Series[simpleCandleSeries.Name].Points.AddXY(ser[i].dateTime.ToLocalTime().ToString("ddd HH:mm"), ser[i].High, ser[i].Low, ser[i].Close, ser[i].Open);
            }
        }

        public void PaintDecimalSeries(string seriesname,List<decimal> values)
        {
            var find = chart1.Series.IndexOf(seriesname);
            if (find >= 0)
            {
                chart1.Series.RemoveAt(find);
            }
            chart1.Series.Add(seriesname);
            chart1.Series[seriesname].ChartType = SeriesChartType.Line;
            chart1.Series[seriesname].YValueType = ChartValueType.Single;
            chart1.Series[seriesname].BorderWidth = 2;
            chart1.Series[seriesname].Color = Color.Blue;
            chart1.Series[seriesname].BorderDashStyle = ChartDashStyle.Solid;


            for (int i = 0; i < values.Count; i++)
            {
                    chart1.Series[seriesname].Points.Add(new DataPoint() { YValues = new double[] { (double)values[i] } });
            }
        }
    }
}