#!/usr/bin/env python3
"""麻江县人民政府（majiang.gov.cn）通知公告爬虫 - TRS CMS"""
import requests
import re
import sqlite3
import sys
import time
from bs4 import BeautifulSoup
from urllib.parse import urljoin
import urllib.parse

BASE_URL = "https://www.majiang.gov.cn"
LIST_URL = BASE_URL + "/xwzx/tzgg/index.html"
LIST_PAGES = 5
DB_PATH = "/root/search.db"
SITE_NAME = "麻江县通知公告"
SLEEP = 1.5

HEADERS = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"}


def get_soup(url):
    try:
        r = requests.get(url, headers=HEADERS, timeout=30)
        r.encoding = "utf-8"
        return BeautifulSoup(r.text, "html.parser")
    except Exception as e:
        print(f"[WARN] 请求失败: {url} - {e}")
        return None


def parse_list_items(soup):
    items = []
    ul = soup.find("ul", class_="NewsList")
    if not ul:
        return items
    for li in ul.find_all("li", recursive=False):
        a = li.find("a", href=True)
        span = li.find("span")
        if not a:
            continue
        href = a.get("href", "").strip()
        title = a.get("title", "") or a.get_text(strip=True)
        date_str = span.get_text(strip=True) if span else ""
        if href and title:
            full_url = urljoin(BASE_URL, href)
            items.append((full_url, title, date_str))
    return items


def parse_detail(soup, url):
    title = ""
    art_title = soup.find("div", class_="ArticleTitle")
    if art_title:
        title = art_title.get_text(strip=True)
    if not title:
        meta_title = soup.find("meta", attrs={"name": "ArticleTitle"})
        if meta_title:
            title = meta_title.get("content", "").strip()

    pub_date = ""
    meta_date = soup.find("meta", attrs={"name": "PubDate"})
    if meta_date:
        m = re.search(r"\d{4}-\d{2}-\d{2}", meta_date.get("content", ""))
        if m:
            pub_date = m.group()

    content_parts = []
    container = None
    content_page = soup.find("div", class_="ContentPageBox")
    if content_page:
        article_con = content_page.find("div", class_="Article_Con")
        if article_con:
            container = article_con.find("div", class_=re.compile(r"trs_editor_view|TRS_UEDITOR")) or article_con
    if not container:
        container = soup

    for child in container.find_all(["p", "table", "img"], recursive=True):
        if child.name == "p":
            if child.find_parent("table"):
                continue
            text = child.get_text(strip=True)
            if text:
                content_parts.append(text)
        elif child.name == "table":
            md = html_table_to_html(child)
            if md:
                content_parts.append(md)
        elif child.name == "img":
            src = child.get("src", "").strip()
            alt = child.get("alt", "").strip()
            if src and not src.endswith(".gif") and "fileTypeImages" not in src:
                full_src = urljoin(BASE_URL, src)
                content_parts.append(f"![{alt}]({full_src})" if alt else f"![]({full_src})")

    content = "\n\n".join(content_parts)

    attachments = []
    for a_tag in container.find_all("a", href=re.compile(r"\.(pdf|doc|docx|xls|xlsx|zip|rar|txt)$", re.I)):
        href = a_tag.get("href", "").strip()
        title_att = a_tag.get_text(strip=True) or href.split("/")[-1]
        if href:
            full_url = urljoin(BASE_URL, href)
            attachments.append({"url": full_url, "title": title_att})

    return title, pub_date, content, str(attachments)


def html_table_to_html(table, base_url=""):
    """保留 HTML 表格结构，仅将相对链接/图片转绝对 URL"""
    from bs4 import BeautifulSoup
    tbl = BeautifulSoup(str(table), 'html.parser')
    for a in tbl.find_all('a'):
        href = a.get('href', '')
        if href and not href.startswith(('http', 'javascript', '#')):
            a['href'] = urllib.parse.urljoin(base_url, href) if base_url else href
    for img in tbl.find_all('img'):
        src = img.get('src', '')
        if src and not src.startswith(('http', '//', 'data:')):
            img['src'] = urllib.parse.urljoin(base_url, src) if base_url else src
    return str(tbl)


def get_page_url(page):
    if page == 1:
        return LIST_URL
    return f"{BASE_URL}/xwzx/tzgg/index_{page}.html"


def main():
    pages = LIST_PAGES
    if len(sys.argv) > 2 and sys.argv[1] == "--pages":
        pages = int(sys.argv[2])

    total_new = 0
    for page in range(1, pages + 1):
        url = get_page_url(page)
        print(f"[列表页] 第{page}页: {url}")
        soup = get_soup(url)
        if not soup:
            continue
        items = parse_list_items(soup)
        if not items:
            print("  无数据，可能已到末页")
            break
        print(f"  找到 {len(items)} 条")

        for item_url, list_title, list_date in items:
            print(f"  → {list_title}")

            conn = sqlite3.connect(DB_PATH, timeout=60)
            c = conn.cursor()
            c.execute("SELECT id FROM gov_raw WHERE page_url=? AND site_name=?", (item_url, SITE_NAME))
            if c.fetchone():
                conn.close()
                print("    已存在，跳过")
                continue
            conn.close()

            time.sleep(SLEEP)
            detail_soup = get_soup(item_url)
            if not detail_soup:
                continue

            detail_title, pub_date, content, attachments = parse_detail(detail_soup, item_url)
            date = pub_date or list_date
            use_title = detail_title or list_title

            if not content:
                print("    正文为空，跳过")
                continue

            conn = sqlite3.connect(DB_PATH, timeout=60)
            c = conn.cursor()
            try:
                summary = content[:200]
                has_table = 1 if "| ---" in content else 0
                c.execute("""INSERT OR REPLACE INTO gov_raw (page_url, title, publish_date, site_name, content, attachments, summary, has_table, script_name) VALUES (?, ?, ?, ?, ?, ?, ?, ?, 'crawl_majiang_tzgg.py')""",
                    (item_url, use_title, date, SITE_NAME, content, attachments, summary, has_table))
                conn.commit()
                print(f"    入库成功 ({len(content.split(chr(10)+chr(10)))}段, 表格={has_table})")
                total_new += 1
            except Exception as e:
                print(f"    入库失败: {e}")
            finally:
                conn.close()

    print(f"\n✅ {SITE_NAME} 爬取完成！共入库 {total_new} 条")


if __name__ == "__main__":
    main()