Traffic Light Sim

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;

namespace TrafficLightSim
{
    public partial class Form1 : Form
    {
        protected Boolean norSouGrpActive = false;
        protected Boolean simulationRunning = false;


        protected int greenTime = 10; // in seconds
        protected int yellowTime = 3; // in seconds

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // INITIALIZE DEFAULT STATE

            // Set start button text
            startStopBtn.Text = "Start Simulation";

            // Set all lights to red
            northLight.BackColor = Color.Red;
            southLight.BackColor = Color.Red;
            eastLight.BackColor = Color.Red;
            westLight.BackColor = Color.Red;
        }

        private void consoleOutput(int type, string message)
        {
            switch (type)
            {
                case 0:
                    consoleLog.AppendText("DEBUG: " + message + "\n");
                    break;
                case 1:
                    consoleLog.AppendText("WARNING: " + message + "\n");
                    break;
                default:
                    consoleLog.AppendText("INFO: " + message + "\n");
                    break;
            }
        }

        private void startStopBtn_Click(object sender, EventArgs e)
        {
            if (!simulationRunning)
            {
                simulationRunning = !simulationRunning; // Invert simulationRunning
                norSouGrpActive = !norSouGrpActive;

                // Update startStopBtn text
                startStopBtn.Text = "Stop Simulation";

                // Set North South group to green

                changeState('g');

                consoleOutput(0, "Initialized. Starting the simulation loop.");
                simulationLoop();
            }
            else
            {
                simulationRunning = !simulationRunning; // Invert simulationRunning

                // Update startStopBtn text
                startStopBtn.Text = "Start Simulation";

                // Stop all traffic
                allTrafficStop();
            }

        }

        private async void simulationLoop()
        {
            while (simulationRunning)
            {
                //consoleOutput(0, "Lights changing to yellow in 10 seconds.");
                await Task.Delay(greenTime * 1000).ContinueWith(t => preLightChange());
            }
        }

        private async void preLightChange()
        {
            changeState('y');
            //consoleOutput(0, "Lights changing switching in 3 seconds.");
            await Task.Delay(yellowTime * 1000).ContinueWith(t => lightChange());
        }

        private void lightChange()
        {
            // Set current group to red
            changeState('r');
            // Invert current group
            norSouGrpActive = !norSouGrpActive;
            // Set new group to green
            changeState('g');
        }

        private void allTrafficStop()
        {
            northLight.BackColor = Color.Red;
            southLight.BackColor = Color.Red;
            eastLight.BackColor = Color.Red;
            westLight.BackColor = Color.Red;
        }

        private void changeState(char state)
        {
            if (norSouGrpActive)
            {
                switch (state)
                {
                    case 'g':
                        northLight.BackColor = Color.Green;
                        southLight.BackColor = Color.Green;
                        break;
                    case 'y':
                        northLight.BackColor = Color.Yellow;
                        southLight.BackColor = Color.Yellow;
                        break;
                    case 'r':
                        northLight.BackColor = Color.Red;
                        southLight.BackColor = Color.Red;
                        break;
                }
            }
            else if (!norSouGrpActive)
            {
                switch (state)
                {
                    case 'g':
                        eastLight.BackColor = Color.Green;
                        westLight.BackColor = Color.Green;
                        break;
                    case 'y':
                        eastLight.BackColor = Color.Yellow;
                        westLight.BackColor = Color.Yellow;
                        break;
                    case 'r':
                        eastLight.BackColor = Color.Red;
                        westLight.BackColor = Color.Red;
                        break;
                }
            }
        }

        private void resetBtn_Click(object sender, EventArgs e)
        {
            simulationRunning = !simulationRunning; // Invert simulationRunning

            // Update startStopBtn text
            startStopBtn.Text = "Start Simulation";

            // Stop all traffic

            allTrafficStop();
        }
    }
}