added insuranceSum calculation missing breed, age factors and yearly premium

src/main/java/com/pfefferminzia/petinsurance/Main.java

@@ -0,0 +1,15 @@
+package com.pfefferminzia.petinsurance;
+
+import java.time.LocalDate;
+import com.pfefferminzia.petinsurance.animals.Dog;
+import com.pfefferminzia.petinsurance.calculations.Calculations;
+import com.pfefferminzia.petinsurance.tariffs.Tariff;
+
+public class Main {
+    public static void main(String[] args) {
+        Dog dog = new Dog(LocalDate.of(2020, 4, 14), "Husky");
+        Calculations calc = new Calculations();
+        System.out.println(calc.calculateInsuranceSum(dog, Tariff.OPTIMAL, LocalDate.of(2026, 1, 2)));
+        
+    }
+}

src/main/java/com/pfefferminzia/petinsurance/animals/Animal.java

@@ -0,0 +1,10 @@
+package com.pfefferminzia.petinsurance.animals;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+
+public sealed interface Animal permits Dog, Cat, SmallAnimal {
+    
+    LocalDate birthday();
+    BigDecimal getBaseInsuranceSum();
+}

src/main/java/com/pfefferminzia/petinsurance/animals/Cat.java

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+package com.pfefferminzia.petinsurance.animals;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+
+public final record Cat(LocalDate birthday) implements Animal {
+
+    @Override
+    public BigDecimal getBaseInsuranceSum() {
+        return BigDecimal.valueOf(2000.0);
+    }
+}

src/main/java/com/pfefferminzia/petinsurance/animals/Dog.java

@@ -0,0 +1,12 @@
+package com.pfefferminzia.petinsurance.animals;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+
+public final record Dog(LocalDate birthday, String breed) implements Animal {
+
+    @Override
+    public BigDecimal getBaseInsuranceSum() {
+        return BigDecimal.valueOf(2500.0);
+    }
+}

src/main/java/com/pfefferminzia/petinsurance/animals/SmallAnimal.java

@@ -0,0 +1,12 @@
+package com.pfefferminzia.petinsurance.animals;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+
+public final record SmallAnimal(LocalDate birthday) implements Animal {
+
+    @Override
+    public BigDecimal getBaseInsuranceSum() {
+        return BigDecimal.valueOf(1000.0);
+    }
+}

src/main/java/com/pfefferminzia/petinsurance/calculations/Calculations.java

@@ -0,0 +1,19 @@
+package com.pfefferminzia.petinsurance.calculations;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+import com.pfefferminzia.petinsurance.animals.Animal;
+import com.pfefferminzia.petinsurance.tariffs.Tariff;
+
+public class Calculations {
+
+    public BigDecimal calculateInsuranceSum(Animal animal, Tariff tariff,
+            LocalDate insuranceStartDate) {
+
+        TariffValidator validator = new TariffValidator(insuranceStartDate);
+        validator.checkTariffAvailability(tariff);
+        
+        BigDecimal insuranceBaseSum = animal.getBaseInsuranceSum();
+        return insuranceBaseSum.multiply(tariff.getRate());
+    }
+}

src/main/java/com/pfefferminzia/petinsurance/calculations/TariffValidator.java

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+package com.pfefferminzia.petinsurance.calculations;
+
+import java.time.LocalDate;
+import com.pfefferminzia.petinsurance.exception.TariffNotAvailableException;
+import com.pfefferminzia.petinsurance.tariffs.Tariff;
+
+public class TariffValidator {
+    private LocalDate insuranceStartDate;
+
+    public TariffValidator(LocalDate insuranceStartDate) {
+        this.insuranceStartDate = insuranceStartDate;
+    }
+
+    public boolean checkTariffAvailability(Tariff tariff) {
+        if (insuranceStartDate.isBefore(LocalDate.of(2026, 7, 1)) && tariff == Tariff.PREMIUM) {
+            throw new TariffNotAvailableException(
+                    "Die Premium Tarifvariante ist nicht vor dem 1. Juli 2026 verfügbar.");
+        }
+        return true;
+    }
+}

src/main/java/com/pfefferminzia/petinsurance/exception/TariffNotAvailableException.java

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+package com.pfefferminzia.petinsurance.exception;
+
+public class TariffNotAvailableException extends RuntimeException {
+
+    public TariffNotAvailableException(String message) {
+        super(message);
+    }
+}

src/main/java/com/pfefferminzia/petinsurance/tariffs/Tariff.java

@@ -0,0 +1,17 @@
+package com.pfefferminzia.petinsurance.tariffs;
+
+import java.math.BigDecimal;
+
+public enum Tariff {
+    KOMPAKT(BigDecimal.ONE), OPTIMAL(BigDecimal.valueOf(1.2)), PREMIUM(BigDecimal.valueOf(1.4));
+
+    private final BigDecimal rate;
+
+    private Tariff(BigDecimal rate) {
+        this.rate = rate;
+    }
+
+    public BigDecimal getRate() {
+        return rate;
+    }
+}