using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using TradeIdeas.ServerConnection;
using TradeIdeas.TIProData;
using TradeIdeas.XML;
using System.Xml;
using static TradeIdeas.TIProGUI.GuiEnvironment;

namespace TradeIdeas.TIProGUI
{
    public partial class IndexPanel : UserControl
    {
        private struct GradientColor
        {
            public GradientInfo inf;
            public Color? color;
        };
        private IndexManager _indexManager;
        private string _symbol;
        public IndexPanel(String symbol)
        {
            _indexManager = IndexManager.Instance;
            _indexManager.receiveIndexEvent += _indexManager_receiveIndexEvent;
            _symbol = symbol;
            InitializeComponent();
            LabelsStayVisible(true);
        }

        private void _indexManager_receiveIndexEvent(List<IndicesData> data)
        {
            if (this.InvokeRequired)
            {
                this.BeginInvoke(new MethodInvoker(delegate
            {
                List<IndicesData> tempData = new List<IndicesData>();
                tempData = data;
                IndicesData dat1 = GetSymbolData(tempData,_symbol);
                if (!String.IsNullOrEmpty(dat1.Symbol))
                {
                    try
                    {
                        LabelsStayVisible(true);
                        string name = dat1.Name;
                        double? change = dat1.Change;
                        double? last = dat1.Last;
                        double? percentChange = dat1.PercentChange;
                        double? maxChange = dat1.MaxChange;
                        double? maxPercentChange = dat1.MaxPercentChange;
                        string prefix = "";
                        string arrow = "";
                        if (change < 0)
                        {
                            GradientColor gradCol = GetColor(change, maxChange);
                            Color? c = gradCol.color;
                            if (c.HasValue)
                            {
                                Color result = c.Value;
                                GradientInfo inf = gradCol.inf;
                                Color foreColor = GradientInfo.AltColor(result);
                                arrow = System.Net.WebUtility.HtmlDecode("&#9660;");//caret down
                                SetColor(result, foreColor);
                            }
                        }
                        if (change > 0)
                        {
                            GradientColor gradCol = GetColor(change, maxChange);
                            Color? c = gradCol.color;
                            if (c.HasValue)
                            {
                                Color result = c.Value;
                                GradientInfo inf = gradCol.inf;
                                Color foreColor = GradientInfo.AltColor(result);
                                prefix = "+";
                                arrow = System.Net.WebUtility.HtmlDecode("&#9650;");//caret up
                                SetColor(result, foreColor);
                            }
                        }
                        lblSymbol.Text = name;
                        lblArrow.Text = arrow;
                        lblChange.Text = prefix + String.Format("{0:0.00}", change);
                        lblLast.Text = String.Format("{0:0.00}", last);
                        lblChangePercent.Text = prefix + String.Format("{0:0.00}", percentChange) + "%";
                    }
                    catch { }
                }
            }));
            }
        }
        public string GetSymbol()
        {
            return _symbol;
        }
        private GradientColor GetColor(double? change,double? maxChange)
        {
            GradientInfo info = new GradientInfo();
            GradientColor retVal = new GradientColor();
            Color? colorVal = null;
            if (change.HasValue && maxChange.HasValue)
            {
                if (change < 0)
                {
                    double min = -1 * (double)maxChange;
                    double shade = (double)change;
                    info.Add(0, Color.White);
                    info.Add(min, Color.Red);
                    colorVal = info.GetColor(shade);
                    retVal.inf = info;
                    retVal.color = colorVal;
                }
                else if (change > 0)
                {
                    double max = (double)maxChange;
                    double shade = (double)change;
                    info.Add(max, Color.Green);
                    info.Add(0, Color.White);
                    colorVal = info.GetColor(shade);
                    retVal.inf = info;
                    retVal.color = colorVal;
                }

            }
            return retVal;
        }
        private void LabelsStayVisible(bool keepVisible)
        {
            lblSymbol.Visible = keepVisible;
            lblLast.Visible = keepVisible;
            lblChange.Visible = keepVisible;
            lblChangePercent.Visible = keepVisible;
            lblArrow.Visible = keepVisible;
        }
        private void SetColor(Color c,Color foreColor)
        {
            this.BackColor = c;
            lblSymbol.ForeColor = foreColor;
            lblLast.ForeColor = foreColor;
            lblChange.ForeColor = foreColor;
            lblChangePercent.ForeColor = foreColor;
            lblArrow.ForeColor = foreColor;
        }
        public void ChangeFont(Font font)
        {
            lblChange.Font = font;
            lblChangePercent.Font = font;
            lblLast.Font = font;
            lblSymbol.Font = font;
            lblArrow.Font = font;
            this.Font = font;
        }
        private IndicesData GetSymbolData(List<IndicesData> tempList,string symbol)
        {
            IndicesData temp = new IndicesData();
            foreach (IndicesData dat in tempList.ToList())
            {
                if (dat.Symbol == symbol)
                {
                    temp = dat;
                    break;
                }
            }
            return temp;
        }

        //the below two customized click handlers for this user control inspired from: https://stackoverflow.com/questions/9677062/user-control-click-event-not-working-when-clicking-on-text-inside-control
        public new event EventHandler Click
        {
            add
            {
                base.Click += value;
                foreach (Control control in Controls)
                {
                    control.Click += value;
                }
            }
            remove
            {
                base.Click -= value;
                foreach (Control control in Controls)
                {
                    control.Click -= value;
                }
            }
        }

        public new event MouseEventHandler MouseDoubleClick
        {
            add
            {
                base.MouseDoubleClick += value;
                foreach (Control control in Controls)
                {
                    control.MouseDoubleClick += value;
                }
            }
            remove
            {
                base.MouseDoubleClick -= value;
                foreach (Control control in Controls)
                {
                    control.MouseDoubleClick -= value;
                }
            }
        }
    }
}