import docx


class SplitDocxUtil:
    @staticmethod
    def read_docx(file_path):
        """读取docx文件内容"""
        try:
            doc = docx.Document(file_path)
            return "\n".join([para.text for para in doc.paragraphs if para.text])
        except Exception as e:
            print(f"读取docx文件出错: {str(e)}")
            return ""

    @staticmethod
    def split_text(text, context_size=200):
        """
        改进的段落分割函数，兼容单/双换行符
        """
        # 先标准化换行符为双换行
        normalized_text = text.replace('\r\n', '\n').replace('\n\n', '\n')
        # 按段落分割（兼容连续换行）
        raw_paragraphs = [p.strip() for p in normalized_text.split('\n') if p.strip()]
        
        chunks = []
        for i, para in enumerate(raw_paragraphs):
            if not para:
                continue
                
            # 获取上下文
            prev_context = raw_paragraphs[i-1][-context_size:] if i > 0 else ""
            next_context = raw_paragraphs[i+1][:context_size] if i < len(raw_paragraphs)-1 else ""
            
            chunks.append((i+1, f"{prev_context}\n\n{para}\n\n{next_context}"))
        
        return chunks