using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using System.Diagnostics;

namespace MonteCarloPi
{
    public partial class Form1 : Form
    {
        private Int64 losowania;
        private int threadNr;
        private int howManyThreads;
        public Stopwatch timer;
        private double[,] results;
        private int processors;

        public Form1()
        {
            InitializeComponent();
        }

        private void calculateBtn_Click(object sender, EventArgs e)
        {
            this.losowania = Convert.ToInt64(losowaniaBox.Text);
            this.threadNr = Convert.ToInt16(resultBox.Text);
            this.howManyThreads = threadNr;
            Random r = new Random();
            this.results = new double[threadNr, 3];
            calculateBtn.Enabled = false;
            this.timer = Stopwatch.StartNew();
            progressBar1.Value = 0;
            textBox3.AppendText("Uruchomiono program.\n");
            for (int i = 0; i < threadNr; i++)
            {
                BackgroundWorker m_oBackgroundWorker = new BackgroundWorker();

                m_oBackgroundWorker.DoWork += new DoWorkEventHandler(m_oBackGroundWorker_DoWork);
                m_oBackgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(m_oBackGroundWorker_RunWorkerCompleted);
               // m_oBackgroundWorker.ProgressChanged += new ProgressChangedEventHandler(m_oBackGroundWorker_ProgressChanged);
               // m_oBackgroundWorker.WorkerReportsProgress = true;

                int[] parameters = new int[2];
                parameters[0] = i;
                parameters[1] = r.Next();

                m_oBackgroundWorker.RunWorkerAsync(parameters);
            }

        }

        private void m_oBackGroundWorker_DoWork(object sender, DoWorkEventArgs e)
        {
            BackgroundWorker m_oBackGroundWorker = sender as BackgroundWorker;
            int[] parameters = (int[])e.Argument;
            int indeks = parameters[0];
            long trafienie = 0;
            long losowaniaWatek = losowania/threadNr;

            Random rand = new Random(parameters[1]);


            for (int i = 1; i < losowaniaWatek; i++)
            {
                if (Math.Pow(rand.NextDouble(), 2) + Math.Pow(rand.NextDouble(), 2) <= 1)
                {
                    trafienie++;
                }
            }
            this.results[indeks, 0] = trafienie;
            this.results[indeks, 1] = 4.0 * trafienie / losowaniaWatek;

            //double bezwzgledna = Math.Abs(Math.PI - aproksymacja);
            processors = Environment.ProcessorCount;

          // for (int nCounter = 1; nCounter <= 100; nCounter += 1)
          //  {
            //    Thread.Sleep(1000);
           //    m_oBackGroundWorker.ReportProgress(nCounter, results);
         //  }

        }

     /*   void m_oBackGroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            if (0 == (e.ProgressPercentage % 5))
            {
                textBox3.AppendText(e.ProgressPercentage.ToString() + "\n");
            }
            progressBar1.Value = e.ProgressPercentage;
            */



        private void m_oBackGroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            if (Interlocked.Decrement(ref howManyThreads) == 0)
            {
                timer.Stop();
                double sum = 0;

                for (int i = 0; i < results.GetLength(0);i++)
                {
                    sum += results[i, 1];
                }
                double aproksymacja = (sum / results.GetLength(0));
                textBox3.Text = "Aproksymacja " + aproksymacja + "\n";
                double time = timer.Elapsed.TotalSeconds;
                textBox3.AppendText("Czas obliczeń " + time.ToString() + "\n");
                textBox3.AppendText("Bezwzględna " + Math.Abs(Math.PI - aproksymacja) + "\n");
                textBox3.AppendText("Ilość procesorów " + processors);
                calculateBtn.Enabled = true;
            }
        }


        //metody do guzików i textboxow
        private void losowaniaBox_TextChanged(object sender, EventArgs e)
        {



        }

        private void resultBox_TextChanged(object sender, EventArgs e)
        {

        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void textBox3_TextChanged(object sender, EventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}