#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
crawl_huazhou_gsgg.py - 化州市人民政府 (www.huazhou.gov.cn) 公告公示
http://www.huazhou.gov.cn/bmzysz/gsgg/
⚠️ 与同站 crawl_huazhou_hpgs.py (=/zdlyxxgk/hjbh/jsxmhjyxpjxx/ 环评) 是【不同栏目】，勿覆盖
CMS: 广东 nfw-cms 门户模板 (静态 index_N.html 分页)
列表: 首页 /bmzysz/gsgg/  第 N 页 /bmzysz/gsgg/index_N.html  (共 236 页, 末页在分页器 last 链接)
  条目: <a href="http://www.huazhou.gov.cn/<col>/content/post_NNNNNNN.html">
          <img src="/images/li.png" alt="">标题</a><span>2026-09-11</span>
  ⚠️ 是聚合列表：条目分布在 syzl/gggsXX、bmzysz/gsggl/gggsXX 等多个子栏目 → 全收
  ⚠️ 页脚「网站声明/联系我们」(/fzllm/wzxx/) 无日期 span，天然被过滤
详情: /bmzysz/gsgg/content/post_N.html  (亦可能是子栏目 /xx/content/post_N.html)
  meta ArticleTitle(完整标题) / PubDate(YYYY-MM-DD)
  正文: div.article-content > div.txt  ← 取 div.txt 可避开 h3 标题重复/subtitle/share/copyright
"""
import sys, os, re, time, json, html as html_lib, urllib.parse
from datetime import datetime, timedelta

try:
    from bs4 import BeautifulSoup
except ImportError:
    BeautifulSoup = None

JSONL_PATH = os.environ.get("JSONL_PATH", "")
ENC = "utf-8"

SITE_NAME = "化州市-公告公示"
GROUP_NAME = "广东"
SCRIPT_NAME = "crawl_huazhou_gsgg.py"
CATEGORY = "公告公示"
BASE_URL = "http://www.huazhou.gov.cn"
LIST_URL = "http://www.huazhou.gov.cn/bmzysz/gsgg/"
LIST_URL_PAGE = LIST_URL + "index_%d.html"

CUTOFF = (datetime.now() - timedelta(days=365 * 3)).strftime("%Y-%m-%d")

HEADERS = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
                  "(KHTML, like Gecko) Chrome/120.0 Safari/537.36",
    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
    "Accept-Language": "zh-CN,zh;q=0.9",
}

_MAX_PAGES = 5
for i, a in enumerate(sys.argv):
    if a.startswith("--pages="):
        try:
            _MAX_PAGES = int(a.split("=", 1)[1])
        except ValueError:
            pass
    elif a == "--pages" and i + 1 < len(sys.argv):
        try:
            _MAX_PAGES = int(sys.argv[i + 1])
        except ValueError:
            pass
_PAGES = _MAX_PAGES if _MAX_PAGES >= 1 else 1


def clean_title(t):
    if not t:
        return ""
    t = html_lib.unescape(t)
    t = t.replace("\u200b", "").replace("\u200c", "").replace("\u200d", "").replace("\ufeff", "")
    t = re.sub(r"^\s*(?:&middot;|·|\u00b7)?\s*(?:&nbsp;|\u00a0)?\s*", "", t)
    t = re.sub(r"^[•·]\s*", "", t)
    t = re.sub(r"\s+", " ", t)
    return t.strip()


def fetch(url, timeout=30, accept=None):
    h = dict(HEADERS)
    if accept:
        h["Accept"] = accept
    last_err = None
    for _ in range(3):
        try:
            import requests, urllib3
            urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
            r = requests.get(url, headers=h, timeout=timeout, verify=False)
            if r.status_code == 200:
                r.encoding = ENC
                return r.text
            last_err = "HTTP %s" % r.status_code
        except Exception as e:
            last_err = str(e)[:80]
        time.sleep(2)
    print("  [fetch fail] %s -> %s" % (url[:90], last_err), flush=True)
    return None


def html_to_text(content, page_url):
    """正文 HTML 清洗：保留 <p>/<table>，附件转 <p><a>绝对URL</a></p> 段落"""
    if not content:
        return "", 0, []
    content = re.sub(r"<!--.*?-->", "", content, flags=re.S)
    content = re.sub(r"<meta[^>]*>", "", content, flags=re.I)
    content = re.sub(r"<script[^>]*>.*?</script>", "", content, flags=re.S | re.I)
    content = re.sub(r"<style[^>]*>.*?</style>", "", content, flags=re.S | re.I)

    attachments = []
    link_protect = {}

    content = re.sub(r"【字号：[^】]*】", "", content)

    if BeautifulSoup:
        try:
            _s = BeautifulSoup(content, "html.parser")
            for el in _s.find_all(["iframe"]):
                el.decompose()
            for el in _s.find_all(style=True):
                st = (el.get("style") or "").replace(" ", "").lower()
                if "display:none" in st or "visibility:hidden" in st:
                    el.decompose()
            content = str(_s)
        except Exception:
            pass

    if BeautifulSoup:
        try:
            _soup = BeautifulSoup(content, "html.parser")
            for a in _soup.find_all("a", href=True):
                href = a["href"]
                if (a.get("appendix") or a.get("data-appendix")
                        or "nfw-cms-attachment" in (a.get("class") or [])
                        or re.search(r"\.(pdf|docx?|xlsx?|zip|rar|wps|et|ofd)", href, re.I)
                        or "/document/download" in href
                        or "/module/download/" in href):
                    # TRS 站附件: href="./P020...xlsx" 可用; oldsrc="/protect/..." 是 CMS 内部路径(直访 404) → 优先 href
                    _href = (href or "").strip()
                    _oldsrc = (a.get("oldsrc") or a.get("OLDSRC") or "").strip()
                    if _href and not re.match(r"^(?:javascript:|mailto:|tel:|#)", _href, re.I):
                        real_href = _href
                    else:
                        real_href = _oldsrc or _href
                    txt = (a.get_text(strip=True) or a.get("_title") or a.get("title")
                           or os.path.basename(real_href.split("?")[0]) or "附件")
                    abs_url = urllib.parse.urljoin(page_url, real_href)
                    attachments.append((abs_url, txt))
                    key = "__ATTACH__%d__" % len(link_protect)
                    link_protect[key] = '<a href="%s" target="_blank">%s</a>' % (abs_url, txt)
                    a.replace_with(key)
            for img in _soup.find_all("img"):
                src = (img.get("src") or img.get("oldsrc") or "")
                if re.search(r"(icons?/|fileTypeImages/icon_|/images/li\.png)", src, re.I):
                    img.decompose()
            for p in _soup.find_all("p"):
                imgs = p.find_all("img")
                if imgs and not p.get_text(strip=True):
                    srcs = []
                    for img in imgs:
                        src = img.get("src") or img.get("oldsrc") or ""
                        if not src:
                            continue
                        abs_url = urllib.parse.urljoin(page_url, src)
                        txt = (img.get("alt") or img.get("title") or "").strip() \
                            or os.path.basename(src.split("?")[0]) or "图片"
                        srcs.append('<a href="%s" target="_blank">%s</a>' % (abs_url, txt))
                    if srcs:
                        key = "__IMG__%d__" % len(link_protect)
                        link_protect[key] = "<p>" + "<br/>".join(srcs) + "</p>"
                        p.replace_with(key)
            for img in _soup.find_all("img"):
                src = img.get("src") or img.get("oldsrc") or ""
                if not src:
                    continue
                abs_url = urllib.parse.urljoin(page_url, src)
                txt = (img.get("alt") or img.get("title") or "").strip() \
                    or os.path.basename(src.split("?")[0]) or "图片"
                key = "__IMG__%d__" % len(link_protect)
                link_protect[key] = '<p><a href="%s" target="_blank">%s</a></p>' % (abs_url, txt)
                img.replace_with(key)
            content = str(_soup)
        except Exception:
            pass

    def _link_repl(m):
        href = m.group(1)
        if re.match(r"^(?:javascript:|mailto:|tel:|s?ftp:|#)", href, re.I):
            return "" if href.lower().startswith("javascript:") else m.group(0)
        inner = m.group(2)
        txt = re.sub(r"<[^>]+>", "", inner)
        txt = html_lib.unescape(txt).strip()
        txt = re.sub(r"^附件[:：]\s*", "", txt).strip()
        if not txt:
            txt = os.path.basename(href.split("?")[0]) or "附件"
        abs_url = urllib.parse.urljoin(page_url, href)
        attachments.append((abs_url, txt))
        key = "__LINK__%d__" % len(link_protect)
        link_protect[key] = '<a href="%s" target="_blank">%s</a>' % (abs_url, txt)
        return key
    content = re.sub(r'<a\s[^>]*href="([^"]+)"[^>]*>(.*?)</a>', _link_repl,
                     content, flags=re.S | re.I)

    if BeautifulSoup:
        try:
            _soup = BeautifulSoup(content, "html.parser")
            for tag in _soup.find_all(True):
                for attr in ("style", "class", "lang", "dir", "align", "valign", "width",
                             "height", "border", "cellpadding", "cellspacing"):
                    tag.attrs.pop(attr, None)
            for d in _soup.find_all("div"):
                if not d.get_text(strip=True) and not d.find("table") \
                        and not d.find("img") and not d.find("a"):
                    d.decompose()
                else:
                    d.unwrap()
            content = str(_soup)
        except Exception:
            pass

    table_protect = []

    def _tbl_repl(m):
        table_protect.append(m.group(0))
        return "__TBL__%d__" % (len(table_protect) - 1)

    has_table = 1 if re.search(r"<table[^>]*>", content, re.I) else 0
    prev = None
    while prev != content:
        prev = content
        content = re.sub(r"<table(?:(?!<table).)*?</table>", _tbl_repl,
                         content, flags=re.S | re.I)

    content = re.sub(r"</p>", "</p>\n\n", content, flags=re.I)
    content = re.sub(r"<br\s*/?>", "\n", content, flags=re.I)
    content = re.sub(r"</?(?:span|font|o:p|st1?:[a-z]+|strong|em|b|i|u)\b[^>]*>", "",
                     content, flags=re.I)

    parts = []
    for block in content.split("\n\n"):
        b = block.strip()
        if not b:
            continue
        b = re.sub(r"(?<=>)\s*[\r\n\t]+\s*", "", b)
        b = re.sub(r"\s*[\r\n\t]+\s*(?=<)", "", b)
        b = b.replace("\r", "").replace("\t", " ")
        b = re.sub(r"[ \t]{2,}", " ", b)
        plain = re.sub(r"<[^>]+>", "", b)
        plain = html_lib.unescape(plain)
        plain = plain.replace("\xa0", " ").replace("&nbsp;", " ")
        plain = re.sub(r"[\s\u200b\u200c\u200d\ufeff]+", "", plain)
        if not plain:
            continue
        # UI button blocks (back-to-top / print / close / share) -> drop
        if re.match(r"^[【\[（(]?\s*(?:返回顶部|回到顶部|返回列表|打印(?:本页)?|关闭(?:窗口)?|分享|扫一扫|上一篇|下一篇)\s*[】\]）)]?$", plain):
            continue
        for k, v in link_protect.items():
            b = b.replace(k, v)
        for i, tbl in enumerate(table_protect):
            b = b.replace("__TBL__%d__" % i, tbl)
        if not re.search(r"<p[ >]", b, re.I) and re.search(r"<a[ >]", b, re.I):
            b = "<p>%s</p>" % b
        parts.append(b.strip())

    out = "\n\n".join(parts)
    for k, v in link_protect.items():
        out = out.replace(k, v)
    for i, tbl in enumerate(table_protect):
        out = out.replace("__TBL__%d__" % i, tbl)

    out = re.sub(r"__(?:LINK|TBL|IMG|ATTACH)__\d+__", "", out)
    out = html_lib.unescape(out)
    out = re.sub(r"[ \t]+\n", "\n", out)
    out = re.sub(r"\n{3,}", "\n\n", out)
    out = re.sub(r"[ \t]{2,}", " ", out)

    seen, final = set(), []
    for p in out.split("\n\n"):
        key = re.sub(r"\s+", "", re.sub(r"<[^>]+>", "", p))
        if not key or key in seen:
            continue
        seen.add(key)
        final.append(p)
    out = "\n\n".join(final).strip()

    dedup, seen_u = [], set()
    for u, t in attachments:
        if u in seen_u:
            continue
        seen_u.add(u)
        dedup.append((u, t))

    return out, has_table, dedup


def fetch_list(page):
    url = LIST_URL if page == 1 else (LIST_URL_PAGE % page)
    return fetch(url) or ""


def parse_list(html_text):
    items = []
    total_pages = 0
    for m in re.finditer(r'index_(\d+)\.html', html_text):
        n = int(m.group(1))
        if n > total_pages:
            total_pages = n
    # 条目: <a href=".../content/post_N.html" ...>(<img>)?标题</a><span>date</span>
    for m in re.finditer(
            r'<a[^>]*href="([^"]*?/content/post_\d+\.html)"[^>]*>(.*?)</a>\s*<span>\s*'
            r'(\d{4}-\d{1,2}-\d{1,2})\s*</span>', html_text, re.S | re.I):
        href = html_lib.unescape(m.group(1)).strip()
        txt = clean_title(re.sub(r"<[^>]+>", "", m.group(2)))
        y, mo, dd = re.split(r"-", m.group(3))
        d = "%s-%s-%s" % (y, mo.zfill(2), dd.zfill(2))
        if not txt or len(txt) < 2:
            continue
        if "/fzllm/" in href:
            continue
        if href.startswith("/"):
            href = BASE_URL + href
        elif not href.startswith("http"):
            href = urllib.parse.urljoin(BASE_URL + "/", href)
        items.append((href, txt, d))
    return items, total_pages


def parse_detail(html_text, page_url):
    title = date = content_html = ""
    soup = None
    if BeautifulSoup:
        try:
            soup = BeautifulSoup(html_text, "html.parser")
            mt = soup.find("meta", attrs={"name": re.compile(r"ArticleTitle", re.I)})
            if mt and mt.get("content"):
                title = clean_title(mt["content"])
            md = soup.find("meta", attrs={"name": re.compile(r"PubDate", re.I)})
            if md and md.get("content"):
                dm = re.search(r"(\d{4})-(\d{1,2})-(\d{1,2})", md["content"])
                if dm:
                    date = "%s-%s-%s" % (dm.group(1), dm.group(2).zfill(2), dm.group(3).zfill(2))
            if not title:
                h1 = soup.find("h1")
                if h1:
                    title = clean_title(h1.get_text(strip=True))
        except Exception:
            soup = None
    if not title:
        m = re.search(r"<title>(.*?)</title>", html_text, re.S | re.I)
        if m:
            parts = [p for p in re.split(r"\s+", clean_title(m.group(1))) if p]
            title = parts[-1] if parts else ""

    if soup:
        ac = soup.select_one("div.article-content")
        el = None
        if ac:
            el = ac.select_one("div.txt") or ac
        if not el:
            el = soup.find(id="zoom")
        if el:
            content_html = "".join(str(c) for c in el.contents)

    if not date:
        dm = re.search(r"(\d{4})[-年/](\d{1,2})[-月/](\d{1,2})", html_text)
        if dm:
            date = "%s-%s-%s" % (dm.group(1), dm.group(2).zfill(2), dm.group(3).zfill(2))
    return title, date, content_html


def main():
    sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
    from crawler_lib import push_to_searchdb

    print("=== %s (%s) pages=%d cutoff=%s ===" % (SITE_NAME, SCRIPT_NAME, _PAGES, CUTOFF),
          flush=True)

    new_count = skip_count = cutoff_count = 0
    seen_urls = set()
    jsonl_rows = []
    batch = []
    list_total = 0
    list_pages = 0

    for page in range(1, _PAGES + 1):
        try:
            html_text = fetch_list(page)
        except Exception as e:
            print("Page %d fetch error: %s" % (page, e), flush=True)
            break
        items, total_pages = parse_list(html_text)
        if total_pages and not list_pages:
            list_pages = total_pages
        if not items:
            print("Page %d: empty, stop" % page, flush=True)
            break
        list_total += len(items)
        print("Page %d: found %d items (total_pages=%d)" % (page, len(items), total_pages),
              flush=True)

        for abs_url, title, date in items:
            if abs_url in seen_urls:
                continue
            seen_urls.add(abs_url)
            if date and date < CUTOFF:
                cutoff_count += 1
                continue
            dhtml = fetch(abs_url)
            if not dhtml:
                skip_count += 1
                continue
            dtitle, ddate, content_html = parse_detail(dhtml, abs_url)
            if not dtitle:
                dtitle = title
            if not ddate:
                ddate = date
            content, has_table, atts = html_to_text(content_html, abs_url)
            plain_len = len(re.sub(r"<[^>]+>", "", content).strip())
            no_para = (not re.search(r"<p[ >]", content, re.I)
                       and not re.search(r"<a[ >]", content, re.I) and not has_table)
            if plain_len < 5 or no_para:
                print("  skip empty/placeholder: %s" % dtitle[:40], flush=True)
                skip_count += 1
                continue
            item = {
                "site_name": SITE_NAME, "source_url": abs_url, "url": abs_url,
                "title": dtitle, "pub_date": ddate, "summary": "",
                "content": content, "category": CATEGORY, "tags": "",
                "group_name": GROUP_NAME,
                "attachments": json.dumps(
                    [{"title": t, "url": u} for u, t in atts], ensure_ascii=False) if atts else "",
            }
            if JSONL_PATH:
                jsonl_rows.append(item)
            else:
                batch.append(item)
            new_count += 1
            print("  + %s (%s, %d字%s)" % (dtitle[:38], ddate, plain_len,
                                           ", 表格" if has_table else ""), flush=True)
            time.sleep(0.2)
        if not JSONL_PATH and batch:
            push_to_searchdb(batch, batch_label=SCRIPT_NAME)
            batch = []
        time.sleep(0.3)

    if JSONL_PATH:
        with open(JSONL_PATH, "w", encoding="utf-8") as f:
            for row in jsonl_rows:
                f.write(json.dumps(row, ensure_ascii=False) + "\n")
        print("JSONL written: %s (%d rows)" % (JSONL_PATH, len(jsonl_rows)), flush=True)
    else:
        if batch:
            push_to_searchdb(batch, batch_label=SCRIPT_NAME)

    print("新增: %d | 跳过: %d | CUTOFF截断: %d | 列表总数(已抓页): %d | 总页数: %d" %
          (new_count, skip_count, cutoff_count, list_total, list_pages), flush=True)
    print("=== %s done ===" % SITE_NAME, flush=True)


if __name__ == "__main__":
    main()