import re
from typing import Any


_PATTERN = re.compile(r"\b(?:кандидат|доктор)(?:\s+[\w-]+){0,12}\s+наук\b|\bph\.?\s*d\.?(?!\w)", re.IGNORECASE)


def academic_degrees(data: dict[str, Any] | None) -> list[str]:
    degrees = []
    seen = set()
    for section in (data or {}).get("sections") or []:
        if not isinstance(section, dict) or not re.search(
            r"образован|степен|academic degree|education", str(section.get("title") or ""), re.IGNORECASE
        ):
            continue
        values = [
            *(entry.get("text") for entry in section.get("year_entries") or [] if isinstance(entry, dict)),
            *(section.get("paragraphs") or []),
            *(section.get("items") or []),
            section.get("raw_text"),
        ]
        table = section.get("table") or {}
        for row in table.get("rows") or []:
            if isinstance(row, dict):
                values.extend(row.get("cells") or [])
        for value in values:
            text = str(value or "").strip()
            for match in _PATTERN.finditer(text):
                degree = match.group(0).strip()
                if degree.casefold() not in seen:
                    seen.add(degree.casefold())
                    degrees.append(degree)
    return degrees