///
/// Copyright (c) 2018 Sensus Slovensko a.s.
///
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Windows.Forms;
using TBF.Resources;
using TBF.UiBridge;
using GraphLib;
using log4net;

namespace TBF.UI.Graphs
{
    public partial class GraphsTabPageCtrl : UserControl
    {
		static readonly ILog log = LogManager.GetLogger(typeof(GraphsTabPageCtrl));


		static readonly GraphInfo[] SupportedGraphs = new GraphInfo[] {
			new GraphInfo { FileName = "Flow",             Caption = string.Format("Q [m3/h]") },
			new GraphInfo { FileName = "Pressure up",      Caption = string.Format("Pr up [bar]") },
			new GraphInfo { FileName = "Pressure down",    Caption = string.Format("Pr dw [bar]") },
			new GraphInfo { FileName = "Temperature up",   Caption = string.Format("T up [°C]") },
			new GraphInfo { FileName = "Temperature down", Caption = string.Format("T dw [°C]") },
			new GraphInfo { FileName = "Temperature div",  Caption = string.Format("T di [°C]") },
			new GraphInfo { FileName = "Div start",        Caption = string.Format("Div start") },
			new GraphInfo { FileName = "Div end",          Caption = string.Format("Div end") },
		};


		PlotterGraphPaneEx.LayoutMode layoutMode;
		CheckBox[] checkBoxes;
		string selectedGraphsPath;
        int selectedBatchNr;
        string selectedTestName;

        public GraphsTabPageCtrl()
        {
            InitializeComponent();

			/// checkBoxes array must be initialized before other actions
            checkBoxes = new CheckBox[] { checkBox1, checkBox2, checkBox3, checkBox4, checkBox5, checkBox6, checkBox7, checkBox8 };

			Localize();

			UpdateCheckBoxesVisibility();

            layoutMode = GraphLib.PlotterGraphPaneEx.LayoutMode.NORMAL;     /// Default value
            if (Program.LocalSettings != null)
            {
                checkBox1.Checked = Program.LocalSettings.Graph1_On;
                checkBox2.Checked = Program.LocalSettings.Graph2_On;
                checkBox3.Checked = Program.LocalSettings.Graph3_On;
                checkBox4.Checked = Program.LocalSettings.Graph4_On;
                checkBox5.Checked = Program.LocalSettings.Graph5_On;
                checkBox6.Checked = Program.LocalSettings.Graph6_On;
                checkBox7.Checked = Program.LocalSettings.Graph7_On;
                checkBox8.Checked = Program.LocalSettings.Graph8_On;
                layoutMode = Program.LocalSettings.GraphsLayoutMode;        /// Override the default value
            }

			layoutModeComboBox.Text = layoutMode.ToString();
			for (PlotterGraphPaneEx.LayoutMode mode = 0; mode <= PlotterGraphPaneEx.LayoutMode.TILES_HOR; mode++)
			{
				layoutModeComboBox.Items.Add(mode.ToString());
			}

			UpdateTestsHistory(testsHistoryTreeView);
			
			selectedGraphsPath = null;

			//Bridge.ProcessDataHandler += delegate(object sender, ProcessDataEventArgs args)
			//{
			//    if (InvokeRequired)
			//    {
			//        Invoke(new EventHandler<ProcessDataEventArgs>(OnProcessData), sender, args);
			//    }
			//    else OnProcessData(sender, args);
			//};
		}

		//void OnProcessData(object sender, ProcessDataEventArgs args)
		//{

		//    if (!paused && isRunning == true)
		//    {
		//        try
		//        {
		//            gPane.starting_idx += Math.Min(RichTextBoxFinds.BenchControl.StateMachine.;
		//            UpdateScrollBar();
		//            gPane.Invalidate();
		//        }
		//        catch { }
		//    }
		//}

		void Localize()
		{
			refreshButton.Text = Strings.Refresh;
			for (int i = 0; i < checkBoxes.Length; i++)
			{
				if (i < SupportedGraphs.Length)
				{
					checkBoxes[i].Text = SupportedGraphs[i].Caption;
				}
			}
		}

		void UpdateCheckBoxesVisibility()
		{
			for (int i = 0; i < checkBoxes.Length; i++)
			{
				checkBoxes[i].Visible = (i < SupportedGraphs.Length);
			}
		}

		private void refreshButton_Click(object sender, EventArgs e)
		{
			UpdateTestsHistory(testsHistoryTreeView);
		}

		void UpdateTestsHistory(TreeView treeView)
		{
			try
			{
				string[] batches = Directory.GetDirectories(Program.GraphsDir);
                int[] batchNrs = new int[batches.Length];
                int i = 0;
                foreach (var b in batches)
                {
                    int nr;
                    if (int.TryParse(Path.GetFileName(b), out nr))
                    {
                        batchNrs[i++] = nr;
                    }
                }
                Array.Sort(batchNrs);

				treeView.Nodes.Clear();
                for (int j = batchNrs.Length - 1; j >= Math.Max(0, batchNrs.Length - 40); j--)
				{
                    string batchNrSstr = batchNrs[j].ToString();
                    string b = Path.Combine(Program.GraphsDir, batchNrSstr);
                    string rootNodeName = batchNrSstr;
					if ((TBF.BenchControl.Sequences.ProcessData.BatchRslts != null) && rootNodeName.Equals(TBF.BenchControl.Sequences.ProcessData.BatchRslts.Batch.BatchNr.ToString()))
					{
						rootNodeName = Strings.current;
					}
					TreeNode node = new TreeNode(rootNodeName);
					node.Tag = null;
					treeView.Nodes.Add(node);
					string[] tests = Directory.GetDirectories(b);
					foreach (var t in tests)
					{
                        string testNameStr = Path.GetFileName(t);
                        TreeNode subnode = new TreeNode(testNameStr);
						node.Nodes.Add(subnode);
						string[] repetitions = Directory.GetDirectories(t);
						if (repetitions.Length == 1)
						{
                            subnode.Tag = string.Format("{0}~{1}~{2}", repetitions[0], batchNrSstr, testNameStr);
						}
						else if (repetitions.Length > 1)
						{
							subnode.Tag = null;
							foreach (var r in repetitions)
							{
                                string repetStr = Path.GetFileName(r);
                                TreeNode subsubnode = new TreeNode(repetStr);
                                subsubnode.Tag = string.Format("{0}~{1}~{2}/{3}", r, batchNrSstr, testNameStr, repetStr);
								subnode.Nodes.Add(subsubnode);
							}
						}
						else
						{
							subnode.Tag = null;
						}
					}
				}
			}
			catch (Exception exc)
			{
				log.ErrorFormat("UpdateTestsHistory() failed: {0}", exc.Message);
			}
		}


		private void testsHistoryTreeView_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
		{
			if (e.Node.Tag is string)
			{
                string[] fields = (e.Node.Tag as string).Split(new char[]{'~'});
                selectedGraphsPath = fields[0];
                selectedBatchNr = int.Parse(fields[1]);
                selectedTestName = fields[2];
                ShowGraphs(plotterDisplayEx, selectedGraphsPath, selectedBatchNr, selectedTestName);
			}
		}


		void ShowGraphs(PlotterDisplayEx display, string path, int batchNr, string testName)
		{
            if (path == null) return;       /// No batch selected yet

            Color[] colors = {  Color.DarkRed, 
								Color.DarkSlateGray,
								Color.DarkCyan, 
								Color.DarkGreen, 
								Color.DarkBlue ,
								Color.DarkMagenta,                              
								Color.DeepPink,
                                Color.DarkGreen };

			float[] gridY = { 0.0002f, 0.0005f, 0.001f, 0.002f, 0.005f, 0.01f, 0.02f, 0.05f, 0.1f, 0.2f, 0.5f, 1, 2, 5, 10, 20, 50, 100, 200, 500 };

			this.SuspendLayout();

			display.Smoothing = System.Drawing.Drawing2D.SmoothingMode.None;
			display.SetDisplayRangeX(0, 300);
			display.PanelLayout = layoutMode;
			display.BackgroundColorTop = Color.White;
			display.BackgroundColorBot = Color.White;
			display.SolidGridColor = Color.LightGray;
			display.DashedGridColor = Color.LightGray;

			display.DataSources.Clear();

            bool first = true;
			for (int i = 0; i < checkBoxes.Length; i++)
			{
				if (checkBoxes[i].Checked && SupportedGraphs.Length > i)
				{
					DataSource dataSrc = new DataSource();

					float ymin;
					float ymax;
					int samplesCount = dataSrc.LoadSamples(Path.Combine(path, SupportedGraphs[i].FileName), out ymin, out ymax);

                    /// Following section of code makes sure graps 1, 2 and graphs 3, 4, 5 use the same scale (Y-axis)
                    DataSource dummyDS = new DataSource();
                    float y1, y2, y3, y4;
                    switch (i)
                    {
                        case 0:
                        default:
                            break;
                        case 1:
                            dummyDS.LoadSamples(Path.Combine(path, SupportedGraphs[2].FileName), out y1, out y2);
                            if (y1 < ymin) ymin = y1;
                            if (y2 > ymax) ymax = y2;
                            break;
                        case 2:
                            dummyDS.LoadSamples(Path.Combine(path, SupportedGraphs[1].FileName), out y1, out y2);
                            if (y1 < ymin) ymin = y1;
                            if (y2 > ymax) ymax = y2;
                            break;
                        case 3:
                            dummyDS.LoadSamples(Path.Combine(path, SupportedGraphs[4].FileName), out y1, out y2);
                            dummyDS.LoadSamples(Path.Combine(path, SupportedGraphs[5].FileName), out y3, out y4);
                            if (y1 < ymin) ymin = y1;
                            if (y2 > ymax) ymax = y2;
                            if (y3 < ymin) ymin = y3;
                            if (y4 > ymax) ymax = y4;
                            break;
                        case 4:
                            dummyDS.LoadSamples(Path.Combine(path, SupportedGraphs[3].FileName), out y1, out y2);
                            dummyDS.LoadSamples(Path.Combine(path, SupportedGraphs[5].FileName), out y3, out y4);
                            if (y1 < ymin) ymin = y1;
                            if (y2 > ymax) ymax = y2;
                            if (y3 < ymin) ymin = y3;
                            if (y4 > ymax) ymax = y4;
                            break;
                        case 5:
                            dummyDS.LoadSamples(Path.Combine(path, SupportedGraphs[3].FileName), out y1, out y2);
                            dummyDS.LoadSamples(Path.Combine(path, SupportedGraphs[4].FileName), out y3, out y4);
                            if (y1 < ymin) ymin = y1;
                            if (y2 > ymax) ymax = y2;
                            if (y3 < ymin) ymin = y3;
                            if (y4 > ymax) ymax = y4;
                            break;
                    }

                    if (first)
                    {
                        first = false;
                        dataSrc.Name = string.Format("{0}   {1}   {2}", batchNr, testName, SupportedGraphs[i].Caption);
                    }
                    else
                    {
                        dataSrc.Name = SupportedGraphs[i].Caption;
                    }
					dataSrc.OnRenderXAxisLabel += RenderXLabel;
					dataSrc.OnRenderYAxisLabel = RenderYLabel;
					dataSrc.AutoScaleY = false;
					dataSrc.SetDisplayRangeY(ymin * 0.9f, ymax * 1.1f);

					float d = ymax * 1.1f - ymin * 0.9f;
					int j = gridY.Length - 1;
					while ((2 * gridY[j] > d) && (j > 0)) j--;
					dataSrc.SetGridDistanceY(gridY[j]);

					dataSrc.GraphColor = colors[i % colors.Length];

					display.DataSources.Add(dataSrc);
				}
			}

			this.ResumeLayout();
			display.Refresh();
		}


		private string RenderXLabel(DataSource s, int idx)
		{
			if (s.AutoScaleX)
			{
				//if (idx % 2 == 0)
				return ((int)(s.Samples[idx].X)).ToString();
				//else
				//	return string.Empty;
			}
			else
			{
				return ((int)(s.Samples[idx].X)).ToString();
			}
		}

		private string RenderYLabel(DataSource s, float value)
		{
            return value.ToString(Config.Utils.SignificantDigitsToFmt(value, 2));
		}

		private void checkBox1_CheckedChanged(object sender, EventArgs e) { Program.LocalSettings.Graph1_On = checkBox1.Checked; AnyCBChanged(); }
		private void checkBox2_CheckedChanged(object sender, EventArgs e) { Program.LocalSettings.Graph2_On = checkBox2.Checked; AnyCBChanged(); }
		private void checkBox3_CheckedChanged(object sender, EventArgs e) { Program.LocalSettings.Graph3_On = checkBox3.Checked; AnyCBChanged(); }
		private void checkBox4_CheckedChanged(object sender, EventArgs e) { Program.LocalSettings.Graph4_On = checkBox4.Checked; AnyCBChanged(); }
		private void checkBox5_CheckedChanged(object sender, EventArgs e) { Program.LocalSettings.Graph5_On = checkBox5.Checked; AnyCBChanged(); }
		private void checkBox6_CheckedChanged(object sender, EventArgs e) { Program.LocalSettings.Graph6_On = checkBox6.Checked; AnyCBChanged(); }
        private void checkBox7_CheckedChanged(object sender, EventArgs e) { Program.LocalSettings.Graph7_On = checkBox7.Checked; AnyCBChanged(); }
        private void checkBox8_CheckedChanged(object sender, EventArgs e) { Program.LocalSettings.Graph8_On = checkBox8.Checked; AnyCBChanged(); }

		void AnyCBChanged()
		{
            ShowGraphs(plotterDisplayEx, selectedGraphsPath, selectedBatchNr, selectedTestName);
		}

		private void layoutModeComboBox_SelectedIndexChanged(object sender, EventArgs e)
		{
			for (PlotterGraphPaneEx.LayoutMode mode = 0; mode <= PlotterGraphPaneEx.LayoutMode.TILES_HOR; mode++)
			{
				if (layoutModeComboBox.Text.Equals(mode.ToString()) && (layoutMode != mode))
				{
					Program.LocalSettings.GraphsLayoutMode = layoutMode = mode;
                    ShowGraphs(plotterDisplayEx, selectedGraphsPath, selectedBatchNr, selectedTestName);
				}
			}
		}
	}

	class GraphInfo
	{
		public string FileName;		/// Name of a file written y the plotter
		public string Caption;		/// Displayed graph lable
	}
}