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

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        static bool GoPauseState=true;
        static bool isRunning = false;
        Thread calcThread;
        Thread timeThread;
        public Form1()
        {
            InitializeComponent();
        }
        private void SimulateCalc()
        {
            int countTo = progressBar1.Maximum;
            while(countTo!=0)
            {
                countTo--;
                progressBar1.PerformStep();
                Thread.Sleep(1);
            }
            timeThread.Abort();
            isRunning = false;
            
        }
        private int SetResult()
        {
            int pom = 1;
            int num = Int32.Parse(textBox1.Text);

            if (num == 0)
                throw new Exception("Argument is 0");

            while (true)
            {
                if (num == 1)
                    break;
                pom *= num;
                num--;
            }
            Silnia.Text = pom.ToString();
            return pom;
        }
        private void CountTime()
        {
            int timer = 0;
            while(true)
            {
                Thread.Sleep(1000);
                timer++;
                SinceStart.Text = timer.ToString();
            }
        }
        private void StartStopButton_Click(object sender, EventArgs e)
        {
            if (isRunning)
            {
                
            }
            else
            {
                try
                {
                    int value = SetResult();
                    isRunning = true;
                    progressBar1.Maximum = value;
                    progressBar1.Step = 1;
                    progressBar1.Value = 0;

                    calcThread = new Thread(() => SimulateCalc());
                    calcThread.Start();

                    timeThread = new Thread(() => CountTime());
                    timeThread.Start();
                }
                catch(Exception)
                {

                }
            }
            
        }

        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                if (GoPauseState)
                {
                    calcThread.Suspend();
                    timeThread.Suspend();

                    button2.Text = "Go";
                    GoPauseState = false;
                }
                else
                {
                    calcThread.Resume();
                    timeThread.Resume();

                    button2.Text = "Pause";
                    GoPauseState = true;                 
                }
            }
            catch(Exception)
            {

            }

        }
        private void Form1_Load(object sender, EventArgs e)
        {
        }
        private void progressBar1_Click(object sender, EventArgs e)
        {
            
        }
    }
}