03. LastStop - C# Fundamentals EXAM G1 - 10.03.2019

using System;
using System.Collections.Generic;
using System.Linq;

namespace _10._03._2019_Mid_Exam
{
    class LastStop
    {
        static void Main(string[] args)
        {
            List<int> numbers = Console.ReadLine()
                                .Split()
                                .Select(int.Parse)
                                .ToList();

            string command = Console.ReadLine();
            while (command != "END")
            {
                string[] instructions = command.Split();
                string currentInstruction = instructions[0];

                if (currentInstruction == "Reverse")
                {
                    numbers.Reverse();
                }

                else if (instructions.Length - 1 > 0)
                {

                    int paintingNumber = int.Parse(instructions[1]);

                    if (currentInstruction == "Change")
                    {
                        if (numbers.Contains(paintingNumber))
                        {
                            int changeNumber = int.Parse(instructions[2]);
                            int currentIndex = numbers.IndexOf(paintingNumber);

                            numbers.Remove(paintingNumber);
                            numbers.Insert(currentIndex, changeNumber);

                        }
                        else
                        {
                            command = Console.ReadLine();
                            continue;
                        }
                    }

                    else if (currentInstruction == "Hide")
                    {
                        if (numbers.Contains(paintingNumber))
                        {
                            numbers.Remove(paintingNumber);
                        }
                        else
                        {
                            command = Console.ReadLine();
                            continue;
                        }
                    }

                    else if (currentInstruction == "Switch")
                    {
                        int secondPaintingNumber = int.Parse(instructions[2]);
                        bool isContains = numbers.Contains(paintingNumber) && numbers.Contains(secondPaintingNumber);

                        if (isContains)
                        {
                            int currentPaintIndex = numbers.IndexOf(paintingNumber);
                            int changePaintIndex = numbers.IndexOf(secondPaintingNumber);

                            numbers.RemoveAt(currentPaintIndex);
                            numbers.Insert(currentPaintIndex, secondPaintingNumber);
                            numbers.RemoveAt(changePaintIndex);
                            numbers.Insert(changePaintIndex, paintingNumber);
                        }
                        else
                        {
                            command = Console.ReadLine();
                            continue;
                        }
                    }

                    else if (currentInstruction == "Insert")
                    {
                        int index = paintingNumber + 1;
                        paintingNumber = int.Parse(instructions[2]);
                        bool isInside = 0 <= index && index <= numbers.Count - 1;
                        if (isInside)
                        {
                            numbers.Insert(index, paintingNumber);
                        }
                        else
                        {
                            command = Console.ReadLine();
                            continue;
                        }
                    }
                }


                command = Console.ReadLine();
            }

            Console.WriteLine(string.Join(' ', numbers));
        }
    }
}