#!/usr/bin/env python3
"""江苏扬农化工集团有限公司 - 环保信息公开"""
import re, sys, os, json
import urllib.request, urllib.error
from bs4 import BeautifulSoup
import sqlite3

BASE_URL = "http://www.yangnong.com.cn"
LIST_URL = BASE_URL + "/yangnong/kcxfz/hbxxgk/A142006003Gone{}.html"
SITE_NAME = "扬农化工-环保信息公开"
SITE_DISPLAY = "江苏扬农化工集团有限公司"
GROUP_NAME = "环评平台"
DB = os.environ.get("SEARCH_DB", "/root/search.db")
HEADERS = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"}

_MAX_PG = None
for i, a in enumerate(sys.argv):
    if a == "--pages" and i + 1 < len(sys.argv):
        _MAX_PG = int(sys.argv[i + 1])
        break

def fetch(url):
    req = urllib.request.Request(url, headers=HEADERS)
    try:
        return urllib.request.urlopen(req, timeout=30).read().decode("utf-8", errors="replace")
    except Exception as e:
        print(f"[WARN] fetch failed: {url} - {e}", file=sys.stderr)
        return ""

def extract_items(html):
    soup = BeautifulSoup(html, "html.parser")
    items = []
    for li in soup.select("li.list.top"):
        zi_a = li.select_one("div.zi > a[href]")
        if not zi_a:
            continue
        href = zi_a["href"].strip()
        title_a = li.find("a", class_="news-title")
        title = title_a.get("title", "") or title_a.get_text(strip=True) if title_a else ""
        if not title:
            title = zi_a.get_text(strip=True)
        time_div = li.select_one("div.time")
        date_text = ""
        if time_div:
            day = time_div.find("p")
            year = time_div.find("i")
            d = day.get_text(strip=True) if day else ""
            y = year.get_text(strip=True) if year else ""
            if d and y:
                date_text = f"{y}-{d}"
        if href and not href.startswith("http"):
            href = BASE_URL + href
        items.append({"title": title.strip(), "url": href, "date": date_text})
    return items

def get_total_pages(html):
    soup = BeautifulSoup(html, "html.parser")
    max_page = 1
    for a in soup.select("div.fy a[href]"):
        m = re.search(r'Gone(\d+)\.html', a["href"])
        if m:
            p = int(m.group(1))
            if p > max_page:
                max_page = p
    tp = soup.select_one("div.tp")
    if tp:
        m = re.search(r'/(\d+)', tp.get_text())
        if m:
            max_page = int(m.group(1))
    return max_page

def parse_detail(html, url):
    soup = BeautifulSoup(html, "html.parser")
    title = ""
    h1 = soup.find("h1", id="Title")
    if h1:
        title = h1.get_text(strip=True)
    if not title and soup.title:
        title = soup.title.string.strip()
        title = re.sub(r"_环保信息公开_江苏扬农化工集团有限公司.*", "", title).strip()
    date_text = ""
    time_span = soup.find("span", id="PublishTime")
    if time_span:
        m = re.search(r"(\d{4}-\d{2}-\d{2})", time_span.get_text())
        if m:
            date_text = m.group(1)
    body = soup.find("div", id="BodyLabel")
    if not body:
        cd = soup.find("div", id="Content")
        if cd:
            body = cd.find("div", id="BodyLabel")
    if not body:
        print(f"[WARN] No content found: {url}", file=sys.stderr)
        return {"title": title, "date": date_text, "content": "", "attachments": []}
    attachments = []
    parts = []
    for el in body.find_all(["p", "table", "img"], recursive=True):
        if el.name == "p" and el.find_parent("table"):
            continue
        if el.name == "table" and el.find_parent("table"):
            continue
        if el.name == "p":
            text = el.get_text(" ", strip=True)
            for a in el.find_all("a", href=True):
                href = a["href"].strip()
                if re.search(r'\.(pdf|docx?|xlsx?|zip|rar)$', href, re.I):
                    atitle = a.get_text(strip=True) or a.get("download", "")
                    ahref = BASE_URL + href if href.startswith("/") else (url.rsplit("/", 1)[0] + "/" + href if not href.startswith("http") else href)
                    if not any(att["url"] == ahref for att in attachments):
                        attachments.append({"title": atitle, "url": ahref})
            if text:
                parts.append(text)
        elif el.name == "table":
            rows = []
            for tr in el.find_all("tr"):
                cols = []
                for cell in tr.find_all(["td", "th"]):
                    cols.append(cell.get_text(" ", strip=True))
                if cols:
                    rows.append("| " + " | ".join(cols) + " |")
            if rows:
                cc = len(rows[0].split("|")) - 2
                rows.insert(1, "| " + " | ".join(["---"] * cc) + " |")
                parts.append("\n".join(rows))
        elif el.name == "img":
            src = el.get("src", "")
            alt = el.get("alt", "")
            if src:
                src = BASE_URL + src if src.startswith("/") else (url.rsplit("/", 1)[0] + "/" + src if not src.startswith("http") else src)
                parts.append(f"![{alt}]({src})" if alt else f"![]({src})")
    seen = set()
    ua = []
    for att in attachments:
        if att["url"] not in seen:
            seen.add(att["url"])
            ua.append(att)
    return {"title": title, "date": date_text, "content": "\n\n".join(parts), "attachments": ua}

def main():
    html = fetch(LIST_URL.format(1))
    if not html:
        print("[ERROR] Cannot fetch list page", file=sys.stderr)
        sys.exit(1)
    total_pages = get_total_pages(html)
    print(f"[INFO] Total pages: {total_pages}", file=sys.stderr)
    if _MAX_PG and total_pages > _MAX_PG:
        print(f"[INFO] Limiting to {_MAX_PG} pages (--pages={_MAX_PG})", file=sys.stderr)
        total_pages = _MAX_PG
    all_items = []
    for pg in range(1, total_pages + 1):
        html = fetch(LIST_URL.format(pg))
        if not html:
            continue
        all_items.extend(extract_items(html))
    print(f"[INFO] Total items from list: {len(all_items)}", file=sys.stderr)
    conn = sqlite3.connect(DB, timeout=60)
    conn.execute("PRAGMA busy_timeout = 60000")
    c = conn.cursor()
    new_count = empty_content = total_attachments = 0
    for item in all_items:
        c.execute("SELECT id FROM gov_raw WHERE page_url=?", (item["url"],))
        if c.fetchone():
            continue
        html = fetch(item["url"])
        if not html:
            continue
        detail = parse_detail(html, item["url"])
        title = detail["title"] or item["title"]
        date_text = detail["date"] or item["date"]
        content = detail["content"]
        attachments = detail["attachments"]
        plain = re.sub(r'\s+', ' ', re.sub(r'<[^>]+>', '', content)).strip()
        summary = plain[:200]
        if not content:
            empty_content += 1
        date_rank = 0
        if date_text:
            m = re.search(r"(\d{4})-(\d{2})-(\d{2})", date_text)
            if m:
                date_rank = int(m.group(1) + m.group(2) + m.group(3))
        att_json = json.dumps(attachments, ensure_ascii=False) if attachments else "[]"
        try:
            c.execute("INSERT OR IGNORE INTO gov_raw (title, site_name, group_name, page_url, publish_date, content, summary, attachments, date_rank) VALUES (?,?,?,?,?,?,?,?,?)",
                      (title, SITE_NAME, GROUP_NAME, item["url"], date_text, content, summary, att_json, date_rank))
            if c.rowcount > 0:
                new_count += 1
                total_attachments += len(attachments)
        except Exception as e:
            print(f"[ERROR] DB insert failed: {title[:30]} - {e}", file=sys.stderr)
    conn.commit()
    conn.close()
    print(f"\n[RESULT] {SITE_NAME}: {new_count} new, {empty_content} empty content, {total_attachments} attachments")

if __name__ == "__main__":
    main()
