#!/usr/bin/env python3
"""Render legacy templates using public loopback data; never import legacy config.

Development-only: pip install jinja2
Usage: python scripts/legacy_ui_reference.py ../ad_scripts/mirror_tool
Then serve test-results/legacy-reference on loopback for visual comparison.
"""
import argparse
from pathlib import Path
import re
import shutil
from jinja2 import Environment, FileSystemLoader, select_autoescape


def main():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument('legacy', type=Path)
    parser.add_argument('--output', type=Path, default=Path('test-results/legacy-reference'))
    args = parser.parse_args()
    template_dir = args.legacy / 'templates'
    base = (template_dir / 'base.html').read_text()
    original_css = base.split('<style>', 1)[1].split('</style>', 1)[0]
    current_css = Path('web/app.css').read_text()
    normalized_css = '\n'.join(line.rstrip() for line in original_css.splitlines())
    assert normalized_css in current_css, 'Original CSS rules were changed or removed'
    env = Environment(loader=FileSystemLoader(template_dir), autoescape=select_autoescape(['html']))
    env.globals.update(get_flashed_messages=lambda **_: [], url_for=lambda _: '#')
    data = dict(session={'authenticated': True}, tasks={'Echo': 18081},
                teams={'Loopback A': '127.0.0.1', 'Loopback B': '::1'},
                custom_proxies={}, port_monitoring_enabled=True, main_team_ip='127.0.0.1')
    args.output.mkdir(parents=True, exist_ok=True)
    for template in ('index.html', 'login.html'):
        html = env.get_template(template).render(**data)
        html = re.sub(r'<script\b[^>]*>.*?</script>', '', html, flags=re.S)
        html = html.replace('https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css', '/vendor/bootstrap.min.css')
        html = html.replace('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css', '/vendor/fontawesome.min.css')
        (args.output / template).write_text(html)
    shutil.copytree('web/vendor', args.output / 'vendor', dirs_exist_ok=True)
    (args.output / 'webfonts').mkdir(exist_ok=True)
    shutil.copyfile('web/vendor/fa-solid-900.woff2', args.output / 'webfonts/fa-solid-900.woff2')
    print(f'Original CSS preserved (trailing whitespace normalized) ({len(original_css)} characters); reference at {args.output}')


if __name__ == '__main__':
    main()