#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
通用 TRS/lonsun 模板爬虫 - 汕头潮阳贵屿镇-政府信息公开
http://www.gdcy.gov.cn - http://www.gdcy.gov.cn/stcygyz/gkmlpt/index
CMS: 广东 gkmlpt API
列表: API/单页
详情: 容器
分页: 分页
"""
import sys, os, re, time, html as html_lib, urllib.parse, sqlite3, json

BASE_URL = "http://www.gdcy.gov.cn"
LIST_URL = "http://www.gdcy.gov.cn/stcygyz/gkmlpt/index"
SITE_NAME = "汕头潮阳贵屿镇-政府信息公开"
GROUP_NAME = "广东"
SCRIPT_NAME = "crawl_gdcy_gkmlpt.py"
CATEGORY = "通知公告"

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

DB_PATH = os.environ.get("DB_PATH", "/mnt/data/search.db")
JSONL_PATH = os.environ.get("JSONL_PATH", "")
ENC = "utf-8"

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 = 1
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

_DAYS_CUTOFF = 365 * 3
_CUTOFF_DATE = time.strftime("%Y-%m-%d", time.localtime(time.time() - _DAYS_CUTOFF * 86400))

APP_PATH = '/stcygyz'
API_URL = 'http://www.gdcy.gov.cn' + APP_PATH + '/gkmlpt/api/all/0'
PAGE_SIZE = 100
_csrf = ''

def _get_csrf():
    global _csrf
    if _csrf:
        return _csrf
    h = fetch('http://www.gdcy.gov.cn' + APP_PATH + '/gkmlpt/index')
    if h:
        m = re.search(r"CSRF\s*:\s*'([^']+)'", h)
        if m:
            _csrf = m.group(1)
    return _csrf


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)
    return t.strip()


def fetch(url, referer=None, timeout=30):
    h = dict(HEADERS)
    if 'gkmlpt/api' in url:
        csrf = _get_csrf()
        if csrf:
            h['X-CSRF-TOKEN'] = csrf
        h['Accept'] = 'application/json'
    if referer:
        h["Referer"] = referer
    last_err = None
    for _ in range(2):
        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(1)
    print("  [fetch fail] %s -> %s" % (url[:90], last_err), flush=True)
    return None


def html_to_text(content, page_url):
    """HTML -> 纯HTML段落输出(保留表格/附件/图片链接)"""
    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)
    content = re.sub(r"发布(?:时间|日期)[:：][^<]{0,30}", "", content)

    if BeautifulSoup:
        try:
            _soup = BeautifulSoup(content, "html.parser")
            # 删除分享/二维码/版权工具条等非正文容器
            for sel in (".bdsharebuttonbox", ".share", ".sharebox", ".shares", "#share", ".fx", ".fenxiang",
                        ".bshare-custom", ".article-share", ".social-share", ".printer", ".print",
                        "div[class*=share]", "div[id*=share]", ".ewm", ".qrcode", ".erweima"):
                for el in _soup.select(sel):
                    el.decompose()
            for a in _soup.find_all("a", href=True):
                if a.get("appendix") or a.get("data-appendix") or re.search(r"\.(pdf|docx?|xlsx?|zip|rar|wps)", a.get("href", ""), re.I):
                    href = a["href"]
                    real_href = a.get("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])
                    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 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 src:
                            abs_url = urllib.parse.urljoin(page_url, src)
                            srcs.append('<a href="%s" target="_blank">%s</a>' % (abs_url, os.path.basename(src.split("?")[0]) or "图片"))
                    if srcs:
                        key = "__IMG__%d__" % len(link_protect)
                        link_protect[key] = "<p>" + "<br/>".join(srcs) + "</p>"
                        p.replace_with(key)
            content = str(_soup)
        except Exception:
            pass

    def _link_repl(m):
        href = m.group(1)
        if href.startswith("javascript:"):
            return ""
        inner = m.group(2)
        txt = re.sub(r"<[^>]+>", "", inner)
        txt = html_lib.unescape(txt).strip()
        txt = re.sub(r"^附件[:：]\s*", "", txt).strip()
        # 仅附件型链接(扩展名)进 attachments 并转为独立链接; 普通链接保留原样
        if re.search(r"\.(pdf|docx?|xlsx?|zip|rar|wps|et|dwg)", href, re.I) or "attachment" in href.lower() or "download" in href.lower():
            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
        # 普通链接: 转绝对URL保留
        abs_url = urllib.parse.urljoin(page_url, href)
        return '<a href="%s" target="_blank">%s</a>' % (abs_url, txt)
    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)
            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
    content = re.sub(r"<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]+)\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
        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)
        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__\d+__", "", out)
    out = re.sub(r"__TBL__\d+__", "", out)
    out = re.sub(r"__IMG__\d+__", "", out)
    out = re.sub(r"__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 = set()
    final = []
    for p in out.split("\n\n"):
        key = re.sub(r"\s+", "", re.sub(r"<[^>]+>", "", p))
        if not key:
            continue
        if key in seen:
            continue
        seen.add(key)
        final.append(p)
    out = "\n\n".join(final).strip()

    return out, has_table, attachments


def main():
    import requests
    sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
    from crawler_lib import push_to_searchdb
    s = requests.Session()
    s.headers.update(HEADERS)

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

    for page in range(1, _PAGES + 1):
        try:
            url = build_list_url(page)
            html_text = fetch(url)
            if not html_text:
                print("Page %d fetch failed" % page, flush=True)
                break
            items = parse_list(html_text, url)
        except Exception as e:
            print("Page %d fetch error: %s" % (page, e), flush=True)
            break
        if not items:
            print("Page %d: empty, stop" % page, flush=True)
            break
        print("Page %d: found %d items" % (page, len(items)), 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_DATE:
                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
            if ddate and ddate < _CUTOFF_DATE:
                skip_count += 1
                continue
            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_html, re.I) and not has_table
            if plain_len < 10 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": "; ".join("%s|%s" % (u, t) for u, t in atts) if atts else "",
            }
            if JSONL_PATH:
                jsonl_rows.append(item)
                print("  JSONL + %s (%s)" % (dtitle[:40], ddate), flush=True)
                new_count += 1
                continue
            batch.append(item)
            new_count += 1
            print("  + %s (%s)" % (dtitle[:40], ddate), flush=True)
            time.sleep(0.08)
        time.sleep(0.2)

    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:
        push_to_searchdb(batch, batch_label=SCRIPT_NAME)

    print("新增: %d" % new_count, flush=True)
    print("跳过: %d" % skip_count, flush=True)
    print("=== %s done ===" % SITE_NAME, flush=True)



def build_list_url(page):
    return API_URL + "?page=%d&pageSize=%d" % (page, PAGE_SIZE)

def parse_list(html_text, page_url):
    # html_text 实为 JSON
    items = []
    try:
        j = json.loads(html_text)
    except Exception:
        return items
    for a in j.get("articles", []):
        title = clean_title(a.get("title", ""))
        url = a.get("url", "")
        ts = a.get("date") or a.get("display_publish_time") or 0
        date = time.strftime("%Y-%m-%d", time.localtime(ts)) if ts else ""
        if title and url:
            items.append((url, title, date))
    return items

def parse_detail(html_text, page_url):
    title = ""; date = ""; content_html = ""
    if BeautifulSoup:
        soup = BeautifulSoup(html_text, "html.parser")
        d = soup.select_one(".article-content") or soup.select_one(".policy-article-content") or soup.select_one("#content")
        if d:
            content_html = "".join(str(c) for c in d.contents)
        h1 = soup.select_one("h1.title") or soup.select_one(".title")
        if h1:
            title = clean_title(h1.get_text(" ", strip=True))
        if not title:
            tt = soup.find("title")
            if tt:
                title = clean_title(re.sub(r"[-_—|].*?$", "", tt.get_text(strip=True)))
        dr = soup.select_one(".date-row") or soup.select_one(".date")
        if dr:
            dm = re.search(r"([0-9]{4}-[0-9]{2}-[0-9]{2})", dr.get_text())
            if dm:
                date = dm.group(1)
    return title, date, content_html



if __name__ == "__main__":
    main()