"""
Heuristics to flag HTML pages that look like elected-official / board / council / contact directories.

Used by the jurisdiction scrape pipeline to drive structured contact extraction and manifest flags.
"""

from __future__ import annotations

import re
from typing import Any, Dict, List, Optional, Set
from urllib.parse import urlparse

_URL_HINTS: List[tuple[str, str, int]] = [
    (r"commissioner[-_/]?bio", "officials", 28),
    (r"county[-_]?commission", "commission", 20),
    (r"major[-_]?council", "council", 22),
    (r"mayor[-_]?&?[-_]?council", "council", 20),
    (r"city\s*council", "council", 22),
    (r"town\s*council", "council", 22),
    (r"county[-_]?official", "officials", 24),
    (r"/official", "officials", 18),
    (r"board[-_]?of[-_]?education", "board", 24),
    (r"meet[-_]?the[-_]?board", "board", 26),
    (r"board[-_]?member", "board", 20),
    (r"commission(er)?s?", "commission", 18),
    (r"mayor", "mayor", 16),
    (r"council", "council", 14),
    (r"contact[-_]?us", "contacts", 16),
    (r"/contacts?/", "contacts", 14),
    (r"directory", "directory", 12),
    (r"elected", "officials", 14),
    (r"leadership", "directory", 10),
    (r"staff", "directory", 8),
]

_TITLE_HINTS = (
    "board of",
    "commissioner bio",
    "mayor and council",
    "mayor & council",
    "school board",
    "city council",
    "town council",
    "county commission",
    "commissioner",
    "mayor",
    "council member",
    "elected official",
    "county official",
    "contact us",
    "meet the",
    "trustee",
    "superintendent",
)


def classify_contact_directory_page(page_url: str, html: Optional[str]) -> Dict[str, Any]:
    """
    Return a dict with ``is_directory``, ``directory_kind``, ``score``, ``matched_signals``.

    ``directory_kind`` is a coarse bucket: ``board``, ``council``, ``commission``, ``mayor``,
    ``officials``, ``contacts``, ``directory``, ``mixed``, or ``unknown``.
    """
    url = (page_url or "").strip()
    path = ""
    try:
        path = (urlparse(url).path or "").lower()
    except Exception:
        path = ""
    path_flat = re.sub(r"[_\s]+", "-", path)
    blob_l = f"{url.lower()} {path_flat}"
    signals: List[str] = []
    kinds: Set[str] = set()
    score = 0

    for pattern, kind, weight in _URL_HINTS:
        if re.search(pattern, blob_l, re.I):
            signals.append(f"url_re:{pattern}")
            kinds.add(kind)
            score += weight

    title_l = ""
    text_head_l = ""
    if html:
        tl = re.search(r"<title[^>]*>([^<]{1,300})</title>", html, re.I | re.S)
        if tl:
            title_l = re.sub(r"\s+", " ", tl.group(1)).strip().lower()
        raw = re.sub(r"(?is)<(script|style|noscript)[^>]*>.*?</\1>", " ", html)
        raw = re.sub(r"(?i)<[^>]+>", " ", raw)
        text_head_l = re.sub(r"\s+", " ", raw)[:9000].lower()

        for kw in _TITLE_HINTS:
            if kw in title_l:
                signals.append(f"title:{kw}")
                score += 12
                if "board" in kw or "trustee" in kw or "school board" in kw:
                    kinds.add("board")
                elif "council" in kw:
                    kinds.add("council")
                elif "commission" in kw:
                    kinds.add("commission")
                elif "mayor" in kw:
                    kinds.add("mayor")
                elif "official" in kw:
                    kinds.add("officials")
                elif "contact" in kw:
                    kinds.add("contacts")

        body_kw = (
            "board of commissioners",
            "county commission",
            "county commissioners",
            "commission chairman",
            "commission district",
            "to contact all commissioners",
            "vice chair",
            "city council",
            "council president",
            "district representative",
            "board member",
            "superintendent",
            "mayor",
            "vice mayor",
            "county administrator",
        )
        for kw in body_kw:
            if kw in text_head_l:
                signals.append(f"body:{kw}")
                score += 6

    directory_kind = "unknown"
    if kinds:
        if len(kinds) >= 2:
            directory_kind = "mixed"
        else:
            directory_kind = next(iter(kinds))

    person_adjacent_image_score = 0
    if html:
        from scripts.discovery.contact_profile_images import score_person_adjacent_images

        person_adjacent_image_score = score_person_adjacent_images(html, page_url=url)
        if person_adjacent_image_score >= 3:
            signals.append(f"person_adjacent_images:{person_adjacent_image_score}")
            score += min(person_adjacent_image_score * 2, 26)

    is_directory = score >= 18
    return {
        "is_directory": bool(is_directory),
        "directory_kind": directory_kind,
        "score": int(min(score, 100)),
        "matched_signals": signals[:40],
        "page_title_snippet": (title_l[:200] if title_l else ""),
        "person_adjacent_image_score": int(person_adjacent_image_score),
    }