# import fitz  # PyMuPDF
# from io import BytesIO

# async def extract_text_from_pdf_bytes(pdf_bytes: bytes) -> str:
#     """
#     Extract text from PDF file in bytes
#     Return plain text
#     """
#     text_chunks = []

#     with fitz.open(stream=pdf_bytes, filetype="pdf") as doc:
#         for page in doc:
#             page_text = page.get_text()
#             if page_text:
#                 text_chunks.append(page_text)

#     return "\n".join(text_chunks).strip()

from io import BytesIO
from pypdf import PdfReader

async def extract_text_from_pdf_bytes(pdf_bytes: bytes) -> str:
    if not isinstance(pdf_bytes, (bytes, bytearray)):
        raise TypeError("pdf_bytes must be bytes")

    reader = PdfReader(BytesIO(pdf_bytes))

    text_parts = []
    for page in reader.pages:
        page_text = page.extract_text()
        if page_text:
            text_parts.append(page_text)

    return "\n".join(text_parts)