import io
import os
import subprocess
from typing import List

from image_processor.utils import get_page_images_from_pdf


def get_pdf_from_pptx(pptx_path: str, temp_dir: str) -> str:
    base_name = os.path.splitext(os.path.basename(pptx_path))[0]
    pdf_filename = f"{base_name}.pdf"

    pdf_path = os.path.join(temp_dir, pdf_filename)

    retry_count = 0
    while not os.path.exists(pdf_path):
        result = subprocess.run(
            f'{os.getenv("LIBREOFFICE")} --convert-to pdf "{pptx_path}" --outdir "{temp_dir}"',
            shell=True,
            capture_output=True,
            text=True,
        )
        print("LibreOffice stdout:", result.stdout)
        print("LibreOffice stderr:", result.stderr)

        retry_count += 1
        if retry_count > 3:
            raise Exception("Failed to convert PPTX to PDF")

    pdf_path = os.path.join(temp_dir, pdf_filename)

    return pdf_path


def get_images_from_pptx(pptx_path: str) -> List[str]:
    temp_dir = os.path.dirname(pptx_path)
    pdf_path = get_pdf_from_pptx(pptx_path, temp_dir)

    return get_page_images_from_pdf(pdf_path, temp_dir)