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 WeifenLuo.WinFormsUI.Docking;
using LiveCharts;
using LiveCharts.Wpf;
using LiveCharts.WinForms;
using LiveCharts.Defaults;
using System.Windows.Media;

namespace friction
{
	public partial class PanelTrendGraph : DockContent
	{
		MainForm m_Owner = null;
		DataHandler m_DataHandler = null;

		string m_CurSpring = "";
		string m_CurTable = "";
		bool m_bHumidity = false;

		public PanelTrendGraph(MainForm owner, DataHandler data)
		{
			InitializeComponent();

			m_Owner = owner;
			m_DataHandler = data;


			Theme.Apply(this);
			Theme.Apply(trendChart);
			Theme.Apply(groupBox1);
			Theme.Apply(rbHumidity);
			Theme.Apply(rbTemp);


			trendChart.AxisX.Add(new Axis
			{
				Title = "Humidity",
			});

			trendChart.AxisY.Add(new Axis
			{
				Title = "RPN",
				MinValue = 0,
				MaxValue = 10,

				Sections = new SectionsCollection
				{
					new AxisSection
					{
						Value = 5,
						SectionWidth = 5,
						Fill = new SolidColorBrush
						{
							Color = System.Windows.Media.Color.FromArgb(Theme.Red.A, Theme.Red.R, Theme.Red.G, Theme.Red.B),
							Opacity = .75
						}
					},
					new AxisSection
					{
						//Label = "Good",
						Value = 3,
						SectionWidth = 2,
						Fill = new SolidColorBrush
						{
							Color = System.Windows.Media.Color.FromArgb(Theme.Yellow.A, Theme.Yellow.R, Theme.Yellow.G, Theme.Yellow.B),
							Opacity = .75
						}
					},
					new AxisSection
					{
						//Label = "Bad",
						Value = 0,
						SectionWidth = 3,
						Fill = new SolidColorBrush
						{
							Color = System.Windows.Media.Color.FromArgb(Theme.Green.A, Theme.Green.R, Theme.Green.G, Theme.Green.B),
							Opacity = .75
						}
					}
				}
			});

			trendChart.LegendLocation = LegendLocation.Right;
			trendChart.DataClick += TrendChart_DataClick;
		}

		public void Reset()
		{
			m_CurSpring = "";
			m_CurTable = "";
			m_bHumidity = false;
		}

		private void TrendChart_DataClick(object sender, ChartPoint chartPoint)
		{
		}

		public void UpdateGraph()
		{
			string strSpring = m_DataHandler.GetCurSpring();
			string strTable = m_DataHandler.GetCurTable();

			if (m_CurSpring == strSpring && m_CurTable == strTable && rbHumidity.Checked == m_bHumidity)
				return;


			var Chart = m_DataHandler.GetHumidityChart(strSpring, strTable);
			if (Chart.Count <= 0)
				return;

			string strTitle = "";
			double dMin = 0;
			double dMax = 0;
			if (rbHumidity.Checked == true)
			{
				strTitle = "Humidity";

				trendChart.AxisX[0].Title = strTitle;

				ChartValues<ScatterPoint>[] Points = {
					new ChartValues<ScatterPoint>(),
					new ChartValues<ScatterPoint>(),
					new ChartValues<ScatterPoint>() };

				var Values = new List<TrendLine.POINT>();

				foreach (var pnt in Chart)
				{
					if(pnt.TEMPERATURE < 0)
						Points[0].Add(new ScatterPoint(pnt.HUMIDITY, pnt.RPN, 2));
					else if(pnt.TEMPERATURE > 30)
						Points[2].Add(new ScatterPoint(pnt.HUMIDITY, pnt.RPN, 2));
					else
						Points[1].Add(new ScatterPoint(pnt.HUMIDITY, pnt.RPN, 2));

					Values.Add(new TrendLine.POINT { X = pnt.HUMIDITY, Y = pnt.RPN });
				}

				

				Values.Sort((a, b) => (a.X == b.X) ? 0 : (a.X < b.X) ? -1 : 1);
				TrendLine trendline = new TrendLine(Values);
				ChartValues<ScatterPoint> TrendPoints = new ChartValues<ScatterPoint>();
				TrendPoints.Add(new ScatterPoint(Values[0].X, trendline.GetY(Values[0].X)));
				TrendPoints.Add(new ScatterPoint(Values[Values.Count / 2].X, trendline.GetY(Values[Values.Count / 2].X)));
				TrendPoints.Add(new ScatterPoint(Values[Values.Count - 1].X, trendline.GetY(Values[Values.Count - 1].X)));

				System.Windows.Media.SolidColorBrush[] brushes = {
				System.Windows.Media.Brushes.DodgerBlue.Clone(),
				System.Windows.Media.Brushes.Green.Clone(),
				System.Windows.Media.Brushes.IndianRed.Clone() };
				foreach (var brush in brushes)
					brush.Opacity = 0.75;

				trendChart.Series = new SeriesCollection
				{
					new ScatterSeries
					{
						Title = "~ 0℃",
						Values = Points[0],
						Fill = brushes[0],
						Foreground = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromArgb(255, 255, 255, 255)),
					},
					new ScatterSeries
					{
						Title = "0℃ ~ 30℃",
						Values = Points[1],
						Fill = brushes[1],
					},
					new ScatterSeries
					{
						Title = "30℃ ~",
						Values = Points[2],
						Fill = brushes[2],
					},
					new LineSeries
					{
						Title = "Trend",
						Values = TrendPoints,
						PointGeometry = DefaultGeometries.None,
						StrokeThickness = 4,
					},
				};


				dMin = Chart.Min(r => r.HUMIDITY - 1);
				dMax = Chart.Max(r => r.HUMIDITY - 1);
			}
			else if(rbTemp.Checked == true)
			{
				strTitle = "Temperature";

				trendChart.AxisX[0].Title = strTitle;

				ChartValues<ScatterPoint>[] Points = {
					new ChartValues<ScatterPoint>(),
					new ChartValues<ScatterPoint>() };
				var Values = new List<TrendLine.POINT>();

				foreach (var pnt in Chart)
				{
					if(pnt.HUMIDITY <= 60)
						Points[0].Add(new ScatterPoint(pnt.TEMPERATURE, pnt.RPN, 2));
					else
						Points[1].Add(new ScatterPoint(pnt.TEMPERATURE, pnt.RPN, 2));

					Values.Add(new TrendLine.POINT { X = pnt.TEMPERATURE, Y = pnt.RPN });
				}

				Values.Sort((a, b) => (a.X == b.X) ? 0 : (a.X<b.X) ? -1 : 1);
				TrendLine trendline = new TrendLine(Values);
				ChartValues<ScatterPoint> TrendPoints = new ChartValues<ScatterPoint>();
				TrendPoints.Add(new ScatterPoint(Values[0].X, trendline.GetY(Values[0].X)));
				TrendPoints.Add(new ScatterPoint(Values[Values.Count / 2].X, trendline.GetY(Values[Values.Count / 2].X)));
				TrendPoints.Add(new ScatterPoint(Values[Values.Count - 1].X, trendline.GetY(Values[Values.Count - 1].X)));

				trendChart.Series = new SeriesCollection
				{
					new ScatterSeries
					{
						Title = "~ 60%",
						Values = Points[0],
						Foreground = System.Windows.Media.Brushes.SkyBlue,
					},
					new ScatterSeries
					{
						Title = "60% ~",
						Values = Points[1],
						Foreground = System.Windows.Media.Brushes.DarkBlue,
					},
					new LineSeries
					{
						Title = "Trend",
						Values = TrendPoints,
						PointGeometry = DefaultGeometries.None,
						StrokeThickness = 4,
					},
				};

				dMin = Chart.Min(r => r.TEMPERATURE - 1);
				dMax = Chart.Max(r => r.TEMPERATURE - 1);
			}
			

			trendChart.AxisX[0].MinValue = dMin;
			trendChart.AxisX[0].MaxValue = dMax;

			m_CurSpring = strSpring;
			m_CurTable = strTable;
			m_bHumidity = rbHumidity.Checked;
		}

		private void rbHumidity_CheckedChanged(object sender, EventArgs e)
		{
			UpdateGraph();
		}

		private void rbTemp_CheckedChanged(object sender, EventArgs e)
		{
			UpdateGraph();
		}
	}
}