#!/usr/bin/env python3
"""Compare Astro preview site content against original scraped HTML."""
import os, re, sys, urllib.request, html

PREVIEW_BASE = "https://componentowl-preview.pages.dev"
ORIGINAL_DIR = "/tmp/cowl-site/www.componentowl.com"

def strip_html(text):
    text = re.sub(r'<script[^>]*>.*?</script>', '', text, flags=re.DOTALL)
    text = re.sub(r'<style[^>]*>.*?</style>', '', text, flags=re.DOTALL)
    text = re.sub(r'<[^>]+>', ' ', text)
    text = html.unescape(text)
    text = re.sub(r'\s+', ' ', text).strip()
    return text

def extract_links(text):
    hrefs = set(re.findall(r'href="([^"]+)"', text))
    return hrefs

def fetch_url(url):
    try:
        req = urllib.request.Request(url, headers={"User-Agent": "Mozilla/5.0"})
        with urllib.request.urlopen(req, timeout=10) as r:
            return r.read().decode('utf-8', errors='ignore')
    except:
        return None

pages = [
    '', 'better-listview', 'better-thumbnail-browser', 'better-splitbutton',
    'better-listview-express', 'blog', 'articles', 'sitemap',
    'about-us', 'support', 'eula', 'privacy-policy', 'disclaimer',
    'pricing-licensing/better-listview', 'pricing-licensing/better-thumbnail-browser',
    'pricing-licensing/better-splitbutton', 'comics'
]

print(f"{'Page':<45} | {'Orig':>6} | {'Preview':>7} | {'Diff':>6} | {'Links ±':>8}")
print("-" * 85)

issues = []
for page in pages:
    orig_file = page if page else 'index'
    orig_path = os.path.join(ORIGINAL_DIR, orig_file + '.html')
    if not os.path.exists(orig_path):
        orig_path = os.path.join(ORIGINAL_DIR, orig_file, 'index.html')

    if os.path.exists(orig_path):
        orig_html = open(orig_path).read()
    else:
        print(f"{page or 'index':<45} | {'NORIG':>6} |")
        continue

    preview_html = fetch_url(f"{PREVIEW_BASE}/{page}") or fetch_url(f"{PREVIEW_BASE}/{page}.html")
    if not preview_html:
        print(f"{page or 'index':<45} | {len(strip_html(orig_html)):>6} | {'MISS':>7} |")
        issues.append(f"MISSING: {page or 'index'}")
        continue

    ot = strip_html(orig_html)
    pt = strip_html(preview_html)
    ol, pl = len(ot), len(pt)
    diff = ((pl - ol) / max(ol, 1)) * 100

    oh = extract_links(orig_html)
    ph = extract_links(preview_html)
    ml = len(oh - ph)

    flag = ""
    if diff < -20:
        flag = " ⚠️"
        issues.append(f"LOSS {diff:.0f}%: {page or 'index'}")
    if ml > 5:
        flag += " 🔗"
        issues.append(f"LINKS -{ml}: {page or 'index'}")

    print(f"{page or 'index':<45} | {ol:>6} | {pl:>7} | {diff:>+5.0f}% | {-ml:>+7}{flag}")

print()
if issues:
    print(f"ISSUES ({len(issues)}):")
    for i in issues: print(f"  {i}")
else:
    print("All pages look good!")