"""使用 unstructured 库解析 PPTX 文件"""

from typing import Optional, Tuple

from scripts.core import _unstructured_elements_to_markdown


def parse(file_path: str) -> Tuple[Optional[str], Optional[str]]:
    """使用 unstructured 库解析 PPTX 文件"""
    try:
        from unstructured.partition.pptx import partition_pptx
    except ImportError:
        return None, "unstructured 库未安装"

    try:
        elements = partition_pptx(
            filename=file_path, infer_table_structure=True, include_metadata=True
        )
        content = _unstructured_elements_to_markdown(elements)
        if not content.strip():
            return None, "文档为空"
        return content, None
    except Exception as e:
        return None, f"unstructured 解析失败: {str(e)}"