fight with boss

using System;

internal class Program
{
    static void Main(string[] args)
    {
        const string MagicFireballCommand = "Fireball";
        const string MagicHealthRegenCommand = "Regen";
        const string MagicVampireCommand = "Vampire";
        const string MagicSplitDamageCommand = "Split damage";
        const string NormalPunchCommand = "Punch";
        const string RunAwayCommand = "Run!";

        Random random = new Random();

        int minPlayerDamage = 1;
        int maxPlayerDamage = 20;
        int playerDamage;
        int minStartPlayerHealth = 50;
        int maxStartPlayerHealth = 100;
        int manaPlayer = 10;
        int maxManaPlayer = 50;
        int manaPlayerRegen = 2;
        float playerHealth = random.Next(minStartPlayerHealth, maxStartPlayerHealth);

        int minEnemyDamage = 2;
        int maxEnemyDamage = 30;
        int enemyDamage;
        int minStartEnemyHealth = 80;
        int maxStartEnemyHealth = 200;
        int enemyHealth = random.Next(minStartEnemyHealth, maxStartEnemyHealth);

        int fireballDamage = 20;
        int quantityRegenHealth = 35;
        float coefficentVampireHealthRegen = 0.5f;
        int numberOfMagicVampireAttack = 0;
        int numberOfRunAwayCommand = 0;

        int minNumberForCriticalDamage = 1;
        int maxNumberForCriticalDamage = 5;
        int minCoefficentCriticalDamage = 2;
        int maxCoefficentCriticalDamage = 4;
        int coefficentCriticalDamage;
        int probablyCriticalDamage;
        int needNumberForCriticalDamage;

        while (playerHealth > 0 && enemyHealth > 0 && numberOfRunAwayCommand == 0)
        {
            string? userInput;
            int quantityManaForMagicFireball = 3;
            int quantityManaForMagicVampire = 5;
            int quantityManaForMagicHealthRegen = 5;
            int quantityManaForMagicSplitDamage = 4;
            int coefficentSplitDamage = 2;

            probablyCriticalDamage = random.Next(minNumberForCriticalDamage, maxNumberForCriticalDamage);
            needNumberForCriticalDamage = random.Next(minNumberForCriticalDamage, maxNumberForCriticalDamage);
            coefficentCriticalDamage = random.Next(minCoefficentCriticalDamage, maxCoefficentCriticalDamage);
            playerDamage = random.Next(minPlayerDamage, maxPlayerDamage);
            enemyDamage = random.Next(minEnemyDamage, maxEnemyDamage);

            Console.WriteLine($"{playerHealth} - здоровья игрока. {manaPlayer} - мана игрока.");
            Console.WriteLine($"{enemyHealth} - здоровья босса.");
            Console.WriteLine();

            Console.WriteLine($"У вас есть несколько комнд для боя с боссом:\n" +
                $"{NormalPunchCommand} - нанести обычный удар.\n" +
                $"{MagicFireballCommand} - удар огненным шаром. Необходимо {quantityManaForMagicFireball} ед маны.\n" +
                $"{MagicVampireCommand} - забрать половину нанесенного урона себе. Необходимо {quantityManaForMagicVampire} маны и" +
                $"Меньше 50% здоровья\n" +
                $"{MagicHealthRegenCommand} - восстановить {quantityRegenHealth} жизней. Необходимо {quantityManaForMagicHealthRegen} маны\n" +
                $"{MagicSplitDamageCommand} - уменьшить урон наносимый противником в 2 раза. Можно использовать " +
                $"только после применения {MagicVampireCommand}. Необходимо {quantityManaForMagicSplitDamage} маны\n" +
                $"{RunAwayCommand} - сбежать с поля боя.");
            Console.WriteLine();

            Console.Write("Введите команду: ");
            userInput = Console.ReadLine();

            switch (userInput)
            {
                case NormalPunchCommand:
                    if (probablyCriticalDamage == needNumberForCriticalDamage)
                    {
                        playerDamage *= coefficentCriticalDamage;
                        enemyHealth -= playerDamage;
                    }
                    else
                    {
                        enemyHealth -= playerDamage;
                    }

                    break;

                case MagicFireballCommand:
                    if (manaPlayer >= quantityManaForMagicFireball)
                    {
                        manaPlayer -= quantityManaForMagicFireball;
                        enemyHealth -= fireballDamage;
                        manaPlayer -= quantityManaForMagicFireball;
                    }
                    else
                    {
                        if (probablyCriticalDamage == needNumberForCriticalDamage)
                        {
                            playerDamage *= coefficentCriticalDamage;
                            enemyHealth -= playerDamage;
                        }
                        else
                        {
                            enemyHealth -= playerDamage;
                        }
                    }

                    break;

                case MagicVampireCommand:
                    if (manaPlayer >= quantityManaForMagicVampire && playerHealth <= maxStartPlayerHealth * coefficentVampireHealthRegen && numberOfMagicVampireAttack <= manaPlayer)
                    {
                        manaPlayer -= quantityManaForMagicVampire;
                        enemyHealth -= playerDamage;
                        playerHealth += playerDamage * coefficentVampireHealthRegen;
                        numberOfMagicVampireAttack++;
                    }
                    else
                    {
                        if (probablyCriticalDamage == needNumberForCriticalDamage)
                        {
                            playerDamage *= coefficentCriticalDamage;
                            enemyHealth -= playerDamage;
                        }
                        else
                        {
                            enemyHealth -= playerDamage;
                        }
                    }

                    break;

                case MagicHealthRegenCommand:
                    if (manaPlayer >= quantityManaForMagicHealthRegen)
                    {
                        playerHealth += quantityRegenHealth;
                        manaPlayer -= quantityManaForMagicHealthRegen;

                        if (playerHealth > maxStartPlayerHealth)
                        {
                            playerHealth = maxStartPlayerHealth;
                        }
                    }
                    else
                    {
                        if (probablyCriticalDamage == needNumberForCriticalDamage)
                        {
                            playerDamage *= coefficentCriticalDamage;
                            enemyHealth -= playerDamage;
                        }
                        else
                        {
                            enemyHealth -= playerDamage;
                        }
                    }

                    break;

                case MagicSplitDamageCommand:
                    if (numberOfMagicVampireAttack > 0 && quantityManaForMagicSplitDamage <= manaPlayer)
                    {
                        enemyDamage = enemyDamage / coefficentSplitDamage;
                        manaPlayer -= quantityManaForMagicSplitDamage;
                    }
                    else
                    {
                        if (probablyCriticalDamage == needNumberForCriticalDamage)
                        {
                            playerDamage *= coefficentCriticalDamage;
                            enemyHealth -= playerDamage;
                        }
                        else
                        {
                            enemyHealth -= playerDamage;
                        }
                    }

                    break;

                case RunAwayCommand:
                    numberOfRunAwayCommand++;
                    Console.Clear();

                    break;

                default:
                    Console.WriteLine("Вы промахнулись и нанесли 0 единиц урона.\nНажмите любую клавишу...");
                    Console.ReadKey();

                    break;
            }

            if (manaPlayer > maxManaPlayer)
            {
                manaPlayer = maxManaPlayer;
            }

            if (playerHealth > maxStartPlayerHealth)
            {
                playerHealth = maxStartPlayerHealth;
            }

            if (numberOfRunAwayCommand > 0)
            {
                Console.WriteLine($"Вы сбежали с поля боя.\n" +
                $"Ваши жизни {playerHealth}\n" +
                $"Жизни противника: {enemyHealth}\n" +
                $"Нажмите любую клавишу...");
                Console.ReadKey();
                return;
            }

            if (probablyCriticalDamage == needNumberForCriticalDamage)
            {
                enemyDamage *= coefficentCriticalDamage;
                playerHealth -= enemyDamage;
            }
            else
            {
                playerHealth -= enemyDamage;
            }

            manaPlayer += manaPlayerRegen;

            Console.Clear();
        }

        if (playerHealth <= 0 && enemyHealth > 0)
        {
            Console.WriteLine($"Босс победил.\n" +
                $"Ваши жизни {playerHealth}\n" +
                $"Жизни противника: {enemyHealth}\n");
        }
        else if (playerHealth > 0 && enemyHealth <= 0)
        {
            Console.WriteLine($"Вы победили!\n" +
             $"Ваши жизни {playerHealth}\n" +
            $"Жизни противника: {enemyHealth}\n");
        }
        else if (playerHealth <= 0 && enemyHealth <= 0)
        {
            Console.WriteLine($"Ничья. Оба мертвы.\n" +
             $"Ваши жизни {playerHealth}\n" +
            $"Жизни противника: {enemyHealth}\n");
        }

        Console.ReadKey();
    }
}