From 7a53cda2941f046170a00674caa96b98de7e940d Mon Sep 17 00:00:00 2001
From: pajjilykk <pgoldendragon@gmail.com>
Date: Wed, 1 Apr 2026 14:33:43 +0700
Subject: [PATCH] add surname separators support

---
 lab3/main.py | 40 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 36 insertions(+), 4 deletions(-)

diff --git a/lab3/main.py b/lab3/main.py
index 293f2ef..f269609 100644
--- a/lab3/main.py
+++ b/lab3/main.py
@@ -1,8 +1,11 @@
 import math
 from decimal import Decimal, InvalidOperation
+import unicodedata
 
 
 class Worker:
+    SURNAME_SEPARATORS = {"-", "'"}
+
     def __init__(self, surname: str, position: str, salary: float):
         self.surname = None
         self.position = None
@@ -18,12 +21,41 @@ class Worker:
 
     @staticmethod
     def validate_surname(surname: str) -> str:
-        surname = surname.strip()
+        surname = unicodedata.normalize("NFKC", surname.strip())
+        surname = surname.replace("’", "'").replace("`", "'").replace("−", "-")
+
         if len(surname) < 2:
             raise ValueError("Фамилия слишком короткая")
-        if not surname.isalpha():
-            raise ValueError("Фамилия должна содержать только буквы")
-        return surname.capitalize()
+
+        if surname[0] in Worker.SURNAME_SEPARATORS or surname[-1] in Worker.SURNAME_SEPARATORS:
+            raise ValueError("Фамилия не может начинаться или заканчиваться разделителем")
+
+        previous_is_separator = False
+        for char in surname:
+            if char in Worker.SURNAME_SEPARATORS:
+                if previous_is_separator:
+                    raise ValueError("Фамилия содержит подряд идущие разделители")
+                previous_is_separator = True
+                continue
+
+            if not char.isalpha():
+                raise ValueError("Фамилия может содержать только буквы, дефис и апостроф")
+
+            previous_is_separator = False
+
+        parts: list[str] = []
+        token = ""
+        for char in surname:
+            if char in Worker.SURNAME_SEPARATORS:
+                parts.append(token)
+                parts.append(char)
+                token = ""
+            else:
+                token += char
+        parts.append(token)
+
+        normalized_parts = [part[:1].upper() + part[1:].lower() if part not in Worker.SURNAME_SEPARATORS else part for part in parts]
+        return "".join(normalized_parts)
 
     # проверка должности
     def set_position(self, position: str):