"""B16 wiring — Footer-Label-vs-URL-Slug-Drift-Detector.

Hängt sich an `state["extra_findings"]` an und rendert einen V2-Block
(`url_slug_drift_html`).
"""

from __future__ import annotations

import html
import logging

from compliance.services.url_slug_drift_check import check_url_slug_drift

logger = logging.getLogger(__name__)


def run_b16(state: dict) -> None:
    new = check_url_slug_drift(state)
    if not new:
        return
    extras = state.get("extra_findings") or []
    extras.extend(new)
    state["extra_findings"] = extras
    state["url_slug_drift_html"] = _render(new)
    logger.info("B16 url-slug-drift: %d finding(s)", len(new))


def _render(findings: list[dict]) -> str:
    cards = []
    for f in findings:
        sev = (f.get("severity") or "").upper()
        color = "#64748b" if sev == "LOW" else "#f59e0b"
        alts = f.get("alt_slugs_404") or []
        alts_html = ""
        if alts:
            alts_html = (
                "<div style='font-size:12px;color:#475569;margin-top:6px;'>"
                f"<em>404-Slugs: {html.escape(', '.join(alts))}</em></div>"
            )
        cards.append(
            f"<div style='margin:12px 0;padding:14px;background:#fff;"
            f"border-left:3px solid {color};border-radius:4px;'>"
            f"<div style='font-weight:600;color:{color};font-size:14px;'>"
            f"{sev} · {html.escape(f.get('check_id') or '')}</div>"
            f"<div style='font-size:14px;margin-top:4px;'>"
            f"<strong>{html.escape(f.get('title') or '')}</strong></div>"
            f"<div style='font-size:12px;color:#64748b;margin-top:2px;'>"
            f"{html.escape(f.get('norm') or '')}</div>"
            f"{alts_html}"
            f"<div style='font-size:12px;color:#475569;margin-top:6px;'>"
            f"<em>{html.escape(f.get('evidence') or '')}</em></div>"
            f"<div style='font-size:13px;margin-top:8px;background:#dcfce7;"
            f"padding:8px 10px;border-radius:4px;'>"
            f"<strong>→ Empfehlung:</strong> "
            f"{html.escape(f.get('action') or '')}</div>"
            "</div>"
        )
    return (
        "<div style='margin:24px 0;padding:16px;border-left:4px solid #64748b;"
        "background:#f8fafc;border-radius:4px;'>"
        "<h2 style='margin:0 0 8px;color:#475569;font-size:16px;'>"
        "🔗 Standard-Slug-Brüche (SEO / Bookmarks)"
        "</h2>"
        + "".join(cards) +
        "</div>"
    )
