using namespace std;

#include <iostream>
#include <string>
#include <cstdlib>
int hp = 100;
int enemy = 100;
int damage;
int enemyDamage;
int game = 1;
int mana = 40;
string action;
int magicSwitch = 0;
int main()
{
    while (game > 0) {
        cout << "An enemy appears!" << endl;
        cout << "What will you do?" << endl;
        cout << "a(attack) i(inventory) s(spells) r(run): ";
        getline(cin, action);

        if (action == "a") {
            damage = rand() % 20;
            enemy = enemy - damage;
             if (damage == 0) {
                 cout << "The enemy evaded your attack!" << endl;
             }
            cout << "You strike the enemy for " << damage << " damage"<<endl;
            enemyDamage = rand() % 15;
            cout << "The enemy strikes back for " << enemyDamage << " damage!" << endl;
            hp = hp - enemyDamage;
        }
        if (action == "i") {

        }
        if (hp <= 0) {
            cout << "Oh dear, you are dead!" << endl;
            game = game - 1;
            return 0;
        }
        if (enemy <= 0) {
            cout << "The enemy has been defeated!" << endl;
            game = game - 1;
        }
        if (action == "s" && mana >= 10) {
            cout << "Which spell do you wish to cast? (1-3)" << endl;
            cout << "1. Fireball (10 mana)." << endl;
            cout << "2. Magic missile! (15 mana)." << endl;
            cout << "3. Heal (20 mana)" << endl;
            cin >> magicSwitch;
        }
        switch (magicSwitch) {
        case 1: cout << "You cast Fireball!" << endl;
            enemy = enemy - damage * 2;
            mana = mana - 10;
            cout << enemy << endl;
            break;
        case 2: cout << "You cast Magic missile!" << endl;
            enemy = enemy - damage - enemy / 3;
            mana = mana - 15;
            cout << enemy << endl;
            break;
        case 3: cout << "You cast Heal!" << endl;
            hp = hp + damage;
            mana = mana - 20;
            cout << hp << endl;
            break;
        default:  cout << "Which spell do you wish to cast? (1-3)" << endl;
            cout << "1. Fireball (10 mana)." << endl;
            cout << "2. Magic missile! (15 mana)." << endl;
            cout << "3. Heal (20 mana)" << endl;
            break;
        }
        if (mana < 10 && action == "s"){
            cout << "You don't have enough mana!" << endl;
        }
    }

        return 0;
}