import math


class LongArticlesMcpConst:
    """MCP 配置层：排序字段、SQL 片段、分页默认值等。"""
    # 分页配置
    DEFAULT_PAGE = 1
    DEFAULT_PAGE_SIZE = 20
    MAX_PAGE_SIZE = 100

    @staticmethod
    def normalize_pagination(page: int | None, page_size: int | None) -> tuple[int, int]:
        page = page or LongArticlesMcpConst.DEFAULT_PAGE
        page = max(page, 1)

        page_size = page_size or LongArticlesMcpConst.DEFAULT_PAGE_SIZE
        page_size = max(1, min(page_size, LongArticlesMcpConst.MAX_PAGE_SIZE))
        return page, page_size

    @staticmethod
    def calc_total_pages(total: int, page_size: int) -> int:
        if total <= 0:
            return 0
        return math.ceil(total / page_size)


__all__ = ["LongArticlesMcpConst"]