task5 is done

src/main/java/task_5/BattleException.java

@@ -0,0 +1,7 @@
+package task_5;
+
+public class BattleException extends RuntimeException {
+    public BattleException(String message) {
+        super(message);
+    }
+}

src/main/java/task_5/BattleSimulator.java

@@ -0,0 +1,49 @@
+package task_5;
+
+import lombok.extern.slf4j.Slf4j;
+
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.Random;
+@Slf4j
+public class BattleSimulator {
+    public static void main(String[] args) {
+        BattleSimulator battleSimulator = new BattleSimulator();
+        Hero hero = new Hero();
+        hero.setHeroName("Ivan");
+        hero.setCurrentMana(50);
+        hero.setInventory(new ArrayList<>());
+        hero.getInventory().add(new MagicItem("Bluster1", 10, 10));
+        hero.getInventory().add(new MagicItem("Bluster2", 15, 5));
+        hero.getInventory().add(new MagicItem("Bluster3", 14, 20));
+        hero.getInventory().add(new MagicItem("Bluster4", 16, 13));
+        hero.getInventory().add(new MagicItem("Bluster5", 6, 14));
+        try {
+            battleSimulator.simulateBattle(hero, 10);
+        } catch (RuntimeException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public void simulateBattle(Hero hero, int numTurns) {
+        if (hero.getInventory()==null || hero.getInventory().isEmpty()) {
+            throw new NoItemsException(hero.getHeroName() + " no have inventary");
+        }
+        Random rnd = new Random();
+        int randomNumber;
+        for (int i = 0; i < numTurns; i++) {
+            try {
+                Thread.sleep(2000);
+            } catch (InterruptedException e) {
+                log.info(e.getStackTrace());
+            }
+            try {
+                randomNumber = rnd.nextInt(hero.getInventory().size());
+                hero.useItem(hero.getInventory().get(randomNumber));
+            } catch (RuntimeException e) {
+                e.printStackTrace();
+            }
+
+        }
+    }
+}

src/main/java/task_5/Hero.java

@@ -0,0 +1,61 @@
+package task_5;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class Hero {
+    private String heroName;
+    private int currentMana;
+    private List<MagicItem> inventory;
+    private Map<String, Long> itemUsages = new HashMap<>();
+
+    public Hero() {
+    }
+
+    public Hero(String heroName, int currentMana, List<MagicItem> inventory) {
+        this.heroName = heroName;
+        this.currentMana = currentMana;
+        this.inventory = inventory;
+    }
+
+    public void useItem(MagicItem magicItem) {
+        if (!inventory.contains(magicItem)) {
+            throw new BattleException(heroName + " dont have " + magicItem.getItemName());
+        }
+        if (magicItem.getManaCost() > currentMana) {
+            throw new BattleException(heroName + " dont have mana to use " + magicItem.getItemName());
+        }
+        long l = itemUsages.get(magicItem.getItemName());
+        if ((System.currentTimeMillis() - l) < magicItem.getCooldown()) {
+            throw new BattleException(heroName + " dont have opportunity to use " + magicItem.getItemName() + " because its dont restore after use");
+        }
+        currentMana -= magicItem.getManaCost();
+        itemUsages.put(magicItem.getItemName(), System.currentTimeMillis());
+        System.out.println(heroName + " use " + magicItem.getItemName());
+    }
+
+    public String getHeroName() {
+        return heroName;
+    }
+
+    public void setHeroName(String heroName) {
+        this.heroName = heroName;
+    }
+
+    public int getCurrentMana() {
+        return currentMana;
+    }
+
+    public void setCurrentMana(int currentMana) {
+        this.currentMana = currentMana;
+    }
+
+    public List<MagicItem> getInventory() {
+        return inventory;
+    }
+
+    public void setInventory(List<MagicItem> inventory) {
+        this.inventory = inventory;
+    }
+}

src/main/java/task_5/MagicItem.java

@@ -0,0 +1,49 @@
+package task_5;
+
+public class MagicItem {
+    private String itemName;
+    private int manaCost;
+    private int cooldown;
+
+    public MagicItem() {
+    }
+
+    public MagicItem(String itemName, int manaCost, int cooldown) {
+        setItemName(itemName);
+        setManaCost(manaCost);
+        setCooldown(cooldown);
+    }
+
+    public String getItemName() {
+        return itemName;
+    }
+
+    public void setItemName(String itemName) {
+        if (itemName.isBlank()) {
+            throw new IllegalArgumentException("name not be empty");
+        }
+        this.itemName = itemName;
+    }
+
+    public int getManaCost() {
+        return manaCost;
+    }
+
+    public void setManaCost(int manaCost) {
+        if (manaCost<=0) {
+            throw new IllegalArgumentException("mana cost must be ,ore than 0");
+        }
+        this.manaCost = manaCost;
+    }
+
+    public int getCooldown() {
+        return cooldown;
+    }
+
+    public void setCooldown(int cooldown) {
+        if (cooldown<=0) {
+            throw new IllegalArgumentException("cool down must be ,ore than 0");
+        }
+        this.cooldown = cooldown;
+    }
+}

src/main/java/task_5/NoItemsException.java

@@ -0,0 +1,7 @@
+package task_5;
+
+public class NoItemsException extends RuntimeException {
+    public NoItemsException(String message) {
+        super(message);
+    }
+}