using Core;
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 System.Windows.Forms.DataVisualization.Charting;
using TrendingGUI.CoreReference;

namespace TrendingGUI
{
    public partial class Form1 : Form
    {
        private CoreReference.ITrending proxy;
        public static Dictionary<string, double[]> chartSeries;

        public Form1(CoreReference.ITrending proxy)
        {

            chartSeries = new Dictionary<string, double[]>();

            InitializeComponent();
            this.proxy = proxy;
            trendingChart.ChartAreas[0].AxisX.Title = "Seconds";
            trendingChart.ChartAreas[0].AxisX.TitleFont = new Font(new FontFamily("Arial"), 12);
            trendingChart.ChartAreas[0].AxisY.Title = "Value";
            trendingChart.ChartAreas[0].AxisY.TitleFont = new Font(new FontFamily("Arial"), 12);

            var tags = proxy.getTagsForDisplay();
            foreach (Tag t in tags.Keys)
            {
                comboBox1.Items.Add(t.Name);
            }

            StartDoing();
        }

        private void History(Value[] values, string name)
        {
            int i = 0;
            historyChart.Series[0].Points.Clear();
            historyChart.Series[0].Name = name;
            historyChart.ChartAreas[0].AxisX.Title = "Seconds";
            historyChart.ChartAreas[0].AxisX.TitleFont = new Font(new FontFamily("Arial"), 12);
            historyChart.ChartAreas[0].AxisY.Title = "Value";
            historyChart.ChartAreas[0].AxisY.TitleFont = new Font(new FontFamily("Arial"), 12);
            historyChart.ChartAreas[0].AxisX.Interval = 1;
            historyChart.Series[0].Enabled = true;

            foreach (var value in values.Reverse())
            {
                historyChart.Series[0].Points.AddXY(i++, value.value1);
            }
        }

        public void Update(Dictionary<Tag, double> tagValues)
        {
            List<string> strings = new List<string>();

            int pos = comboBox1.Text.Length;
            comboBox1.Items.Clear();
            comboBox1.Select(pos, 0);

            foreach (Tag t in tagValues.Keys)
            {
                comboBox1.Items.Add(t.Name);
                int index = getCBIndex(t.Name);

                if (index != -1)
                {
                    if (!checkedListBox1.GetItemChecked(index))
                        trendingChart.Series[t.Name].Enabled = false;
                    else trendingChart.Series[t.Name].Enabled = true;
                }

                if (chartSeries.ContainsKey(t.Name))
                {
                    chartSeries[t.Name][chartSeries[t.Name].Length - 1] = tagValues[t];
                    Array.Copy(chartSeries[t.Name], 1, chartSeries[t.Name], 0, chartSeries[t.Name].Length - 1);
                }
                else
                {
                    trendingChart.Series.Add(t.Name);
                    trendingChart.Series[t.Name].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Spline;
                    double[] myArray = new double[15];
                    for (int i = 0; i < 15; i++) myArray[i] = tagValues[t];
                    chartSeries.Add(t.Name, myArray);
                    checkedListBox1.Items.Add(t.Name, true);
                }
                strings.Add(t.Name);
            }

            UpdateSeries(strings);
            UpdateChart();
        }

        private int getCBIndex(string t)
        {

            int index = 0;
            foreach (string p in checkedListBox1.Items)
            {
                if (p == t) return index;
                else index++;
            }
            return -1;

        }


        private void UpdateSeries(List<string> strings)
        {
            foreach (string s in chartSeries.Keys.ToList())
            {
                if (!(strings.Contains(s)))
                {
                    trendingChart.Series[s].Points.Clear();
                    trendingChart.Series.Remove(trendingChart.Series[s]);
                    checkedListBox1.Items.Remove(s);
                    chartSeries.Remove(s);
                }
            }
        }



        private void UpdateChart()
        {
            int i;
            foreach (string s in chartSeries.Keys)
            {

                trendingChart.Series[s].Points.Clear();
                for (i = 0; i < chartSeries[s].Length - 1; i++)
                {
                    trendingChart.Series[s].Points.AddXY(i, chartSeries[s][i]);
                }
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            History(proxy.getValuesFromDatabaseGUI(comboBox1.Text), comboBox1.Text);
        }

        private void StartDoing()
        {
            timer1.Start();

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            Update(proxy.getTagsForDisplay());
        }
    }
}