///
/// Copyright (c) 2021 Sensus Slovensko a.s.
///
using System;
using System.IO;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;
using Common.Iperl;
using System.Globalization;
using System.Drawing;

namespace FeatureVectorCalculator
{
    public partial class CalculatorWnd : Form
    {
        public const int MaxOptoDataCount = 40000;
        public const bool Downsample = true;
        public const bool Extend = true;


        OptoTelegramRaw[] optoData;
        Int64 volumeRawExtLast;
        Int64 timestampExtLast;


        public CalculatorWnd()
        {
            InitializeComponent();

            optoData = new OptoTelegramRaw[MaxOptoDataCount];
            for (int i = 0; i < MaxOptoDataCount; i++)
            {
                optoData[i] = new OptoTelegramRaw();
            }
        }

        void ClearOutput()
        {
            resultsTextBox.Clear();
            tabControl1.TabPages[0].Controls.Clear();
            tabControl1.TabPages[1].Controls.Clear();
            tabControl1.TabPages[2].Controls.Clear();
            tabControl1.TabPages[3].Controls.Clear();
            tabControl1.TabPages[4].Controls.Clear();
            tabControl1.TabPages[5].Controls.Clear();
            tabControl1.TabPages[6].Controls.Clear();
            tabControl1.TabPages[7].Controls.Clear();
        }

        private void browseButton_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();

            if (ofd.ShowDialog() == DialogResult.OK)
            {
                rawFileComboBox.Text = ofd.FileName;
                ProcessRawDataFile(ofd.FileName);
            }
        }

        void ProcessRawDataFile(string fileName)
        {
            int counter = 0;
            int startIx = -1;
            int endIx = -1;

            ClearOutput();

            resultsTextBox.Text = string.Format("File name: {0}{1}", fileName, Environment.NewLine);

            try
            {
                using (StreamReader reader = new StreamReader(fileName))
                {
                    string line;
                    while ((line = reader.ReadLine()) != null && counter < MaxOptoDataCount)
                    {
                        int ix = line.IndexOf(" :\t");
                        string[] items = line.Split('\t');

                        if (items.Length > 18)
                        {
                            string telegram = string.Format("{0}\t{1}\t{2}\t{3}\t{4}\t{5}\t{6}\r\n",
                                                            items[2], items[3], items[4], items[5], items[6], items[7], items[8]);

                            if (optoData[counter].UpdateFromString(telegram, counter, 0, ref volumeRawExtLast, ref timestampExtLast))
                            {
                                if (line.EndsWith("####  start test  ####"))
                                {
                                    startIx = counter;
                                    optoData[counter].Flags = OptoTelegramFlags.OK_TestStart;
                                }
                                else if (line.EndsWith("####  end of test  ####"))
                                {
                                    endIx = counter;
                                    optoData[counter].Flags = OptoTelegramFlags.OK_TestEnd;
                                }
                                else
                                {
                                    optoData[counter].Flags = OptoTelegramFlags.OK;
                                }
                            }

                            optoData[counter].RefFlow = float.Parse(items[15].Replace(',', '.'), CultureInfo.InvariantCulture);
                        }
                        else
                        {
                            optoData[counter].Flags = OptoTelegramFlags.InvalidTelegram;
                        }

                        counter++;
                    }

                    reader.Close();
                }
            }
            catch (Exception exc)
            {
                MessageBox.Show(string.Format("Exception: {0}", exc.Message));
                return;
            }

            int start = Extend ? 0 : startIx;
            int end = Extend ? (counter - 1) : endIx;
            float[] offsetV, kOhmsR, kOhmsC, dutFlow, refFlow, flowRatio, magField, emfV;
            PointF[] outliers, extendedOutliers;
            float[] featureVector = Common.StatisticalMetrics.Calculate(optoData, counter, start, end, Downsample,
                                                                        out offsetV, out kOhmsR, out kOhmsC, out dutFlow,
                                                                        out refFlow, out flowRatio, out magField, out emfV,
                                                                        out outliers, out extendedOutliers);

            for (int i = 0; i < Math.Min(9, featureVector.Length); i++)
            {
                resultsTextBox.Text += string.Format("X{0} = {1}{2}", i + 1, featureVector[i], Environment.NewLine);
            }

            float period = Downsample ? 0.5F : 0.125F;
            if (offsetV != null)   tabControl1.TabPages[0].Controls.Add(SignalChart.GetChart(offsetV,   period, "OffsetV",   "OffsetV [μV]"));
            if (kOhmsR != null)    tabControl1.TabPages[1].Controls.Add(SignalChart.GetChart(kOhmsR,    period, "kOhmsR",    "kΩ"));
            if (kOhmsC != null)    tabControl1.TabPages[2].Controls.Add(SignalChart.GetChart(kOhmsC,    period, "kOhmsC",    "kΩ"));
            if (dutFlow != null)   tabControl1.TabPages[3].Controls.Add(SignalChart.GetChart(dutFlow,   period, "dutFlow",   "L/h"));
            if (refFlow != null)   tabControl1.TabPages[4].Controls.Add(SignalChart.GetChart(refFlow,   period, "refFlow",   "L/h"));
            if (flowRatio != null) tabControl1.TabPages[5].Controls.Add(SignalChart.GetChart(flowRatio, period, "flowRatio", "", true, extendedOutliers, outliers));
            if (magField != null)  tabControl1.TabPages[6].Controls.Add(SignalChart.GetChart(magField,  period, "magField",  "μV", false));
            if (emfV != null)      tabControl1.TabPages[7].Controls.Add(SignalChart.GetChart(emfV,      period, "emfV",      "μV"));
        }
    }
}