import re

with open('/home/x79/sisvietnamvn_01/BV_DHYD_HCM/Đội ngũ bác sĩ UMC.html', 'r', encoding='utf-8') as f:
    content = f.read()

# Try to find <main> tag
main_match = re.search(r'<main[^>]*>.*?</main>', content, flags=re.DOTALL | re.IGNORECASE)

if main_match:
    main_html = main_match.group(0)
    print(f"Found <main> tag! Size: {len(main_html)} bytes")
    # Save it to a file for easier inspection
    with open('main_extracted.html', 'w', encoding='utf-8') as out:
        out.write(main_html)
    print("Saved to main_extracted.html")
else:
    print("No <main> tag found. Looking for #__next")
    next_match = re.search(r'<div[^>]*id=["\']__next["\'][^>]*>.*?</div><!--', content, flags=re.DOTALL | re.IGNORECASE)
    if next_match:
        print("Found __next but regex might not match the whole nested div accurately without an HTML parser.")