#!/usr/bin/env python3
import sys
import re
from pypdf import PdfReader

def extract_customer(pdf_path):
    try:
        reader = PdfReader(pdf_path)
        for page in reader.pages:
            text = page.extract_text()
            if text:
                if 'Fakturaöversikt' in text:
                    return 'index'
                match = re.search(r'Kund\s+(\d+)', text)
                if match:
                    return f'customer_{match.group(1)}'
    except Exception as e:
        pass
    return None

if __name__ == '__main__':
    if len(sys.argv) > 1:
        result = extract_customer(sys.argv[1])
        if result:
            print(result)