#!/usr/bin/env python3
"""竹溪县人民政府-通知公告 爬虫
URL: http://www.zhuxi.gov.cn/xxgkxi/zc/qtzdgkwj/tzgg/
分页: createPageHTML(25,...) 25页, index_N.shtml (N=0..24)
列表: list-group-item > a[title]
详情: content 类 div
"""

import re
import json
import time
import hashlib
import requests
from datetime import datetime
from bs4 import BeautifulSoup

BASE_URL = "http://www.zhuxi.gov.cn"
LIST_BASE = "/xxgkxi/zc/qtzdgkwj/tzgg"
SITE_NAME = "竹溪县人民政府-通知公告"
TOTAL_PAGES = 25

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

session = requests.Session()
session.headers.update(HEADERS)


def get_list_url(page):
    """page is 1-indexed. Page 1 = index.shtml, Page N = index_{N-1}.shtml"""
    if page <= 1:
        return f"{BASE_URL}{LIST_BASE}/"
    return f"{BASE_URL}{LIST_BASE}/index_{page-1}.shtml"


def parse_list_page(html):
    """Parse list page, return list of (url, title, date_str)"""
    items = []
    li_pattern = re.compile(
        r'<li\s+class="list-group-item[^"]*"[^>]*>(.*?)</li>', re.DOTALL
    )
    for m in li_pattern.finditer(html):
        li = m.group(1)
        # Title from <a title="...">
        a_m = re.search(r'<a\s+href="([^"]*)"[^>]*title="([^"]*)"', li)
        if not a_m:
            continue
        href = a_m.group(1).strip()
        title = a_m.group(2).strip()
        # Date from <span class="d-none d-sm-block">YYYY-MM-DD</span>
        date_m = re.search(
            r'class="d-none d-sm-block"[^>]*>\s*(\d{4}-\d{2}-\d{2})', li
        )
        date_str = date_m.group(1).strip() if date_m else ""
        items.append((href, title, date_str))
    return items


def parse_detail(html, url):
    """Parse detail page"""
    soup = BeautifulSoup(html, "html.parser")

    # Title from meta[name=ArticleTitle]
    title_tag = soup.find("meta", attrs={"name": "ArticleTitle"})
    full_title = title_tag.get("content", "").strip() if title_tag else ""

    # Date from meta[name=PubDate]
    pub_date = ""
    meta_date = soup.find("meta", attrs={"name": "PubDate"})
    if meta_date and meta_date.get("content"):
        pub_date = meta_date["content"].strip()[:10]

    # Find content div - TRS_UEDITOR or common patterns
    content_div = soup.find("div", class_="TRS_UEDITOR")
    if not content_div:
        content_div = soup.find("div", class_="trs_editor_view")
    if not content_div:
        content_div = soup.find("div", class_="view")
    if not content_div:
        content_div = soup.find("div", class_="content")
    if not content_div:
        content_div = soup.find("div", class_="article")
    if not content_div:
        content_div = soup.find("div", class_="Custom_UnionStyle")

    content_html = ""
    attachments = []

    if content_div:
        # Attachments from all page links
        for a_tag in soup.find_all("a"):
            href = a_tag.get("href", "")
            a_text = a_tag.get_text(strip=True)
            if re.search(r"\.(doc|docx|pdf|xls|xlsx|zip|rar)$", href, re.I):
                if not href.startswith("http"):
                    if href.startswith("//"):
                        href = f"https:{href}"
                    elif href.startswith("/"):
                        href = f"{BASE_URL}{href}"
                    elif href.startswith("./"):
                        href = f"{BASE_URL}{LIST_BASE}/{href[2:]}"
                    else:
                        href = f"{BASE_URL}/{href}"
                if len(a_text) > 2:
                    attachments.append({"title": a_text, "url": href})
                    a_tag.replace_with(f"[{a_text}]({href})")

        # Handle tables
        for table in content_div.find_all("table"):
            table_html = str(table)
            table.replace_with(f"\n\n[TABLE]\n{table_html}\n[/TABLE]\n")

        # Get paragraphs
        content_parts = []
        for child in content_div.children:
            tag_name = getattr(child, "name", None)
            if tag_name == "p":
                text = child.get_text(" ", strip=True).strip()
                if text:
                    content_parts.append(text)
            elif tag_name == "div":
                text = child.get_text(" ", strip=True).strip()
                if text:
                    content_parts.append(text)
            elif child.name is None:
                text = str(child).strip()
                if text:
                    content_parts.append(text)

        if not content_parts:
            content_html = content_div.get_text(" ", strip=True)
        else:
            content_html = "\n\n".join(content_parts)

        # Restore tables
        content_html = re.sub(
            r"\[TABLE\]\n(.*?)\n\[/TABLE\]",
            lambda m: f"\n\n{m.group(1)}\n\n",
            content_html,
            flags=re.DOTALL,
        )

        # Filter metadata
        metadata_patterns = [
            r"^责任编辑[：:]",
            r"^初审[：:]",
            r"^复审[：:]",
            r"^终审[：:]",
            r"^\[纠错\]",
            r"^【纠错】",
            r"^扫一扫在手机打开当前页",
        ]
        lines = content_html.split("\n")
        filtered_lines = []
        for line in lines:
            stripped = line.strip()
            skip = False
            for pat in metadata_patterns:
                if re.match(pat, stripped):
                    skip = True
                    break
            if not skip:
                filtered_lines.append(line)
        content_html = "\n".join(filtered_lines).strip()

        # Empty content fallback
        if len(content_html.strip()) < 20:
            desc_tag = soup.find("meta", attrs={"name": "description"})
            if desc_tag and desc_tag.get("content"):
                content_html = desc_tag["content"].strip()

    return {
        "title": full_title,
        "content": content_html,
        "publish_date": pub_date,
        "attachments": json.dumps(attachments, ensure_ascii=False),
        "source_url": url,
    }


def crawl_pages(max_pages, page_start=1, page_end=None):
    if page_end is None:
        page_end = max_pages

    results = []
    total_listed = 0

    for page in range(page_start, page_end + 1):
        url = get_list_url(page)
        print(f"[列表] 第{page}页: {url}", flush=True)

        try:
            resp = session.get(url, timeout=30)
            resp.encoding = "utf-8"
            if resp.status_code != 200:
                print(f"  -> HTTP {resp.status_code}, 跳过", flush=True)
                continue
        except Exception as e:
            print(f"  -> 请求失败: {e}", flush=True)
            time.sleep(2)
            continue

        items = parse_list_page(resp.text)
        print(f"  -> 解析到 {len(items)} 条", flush=True)
        total_listed += len(items)

        if not items:
            break

        for idx, (item_url, list_title, date_str) in enumerate(items, 1):
            print(f"  [{idx}/{len(items)}] {list_title[:50]}...", flush=True)

            # Resolve relative URL
            full_url = item_url
            if not item_url.startswith("http"):
                if item_url.startswith("//"):
                    full_url = f"https:{item_url}"
                elif item_url.startswith("/"):
                    full_url = f"{BASE_URL}{item_url}"
                elif item_url.startswith("./"):
                    full_url = f"{BASE_URL}{LIST_BASE}/{item_url[2:]}"
                else:
                    full_url = f"{BASE_URL}/{item_url}"

            try:
                dresp = session.get(full_url, timeout=30)
                dresp.encoding = "utf-8"
                if dresp.status_code != 200:
                    print(f"    -> HTTP {dresp.status_code}", flush=True)
                    continue
            except Exception as e:
                print(f"    -> 详情页请求失败: {e}", flush=True)
                time.sleep(1)
                continue

            detail = parse_detail(dresp.text, full_url)
            if detail["title"]:
                list_title = detail["title"]
            detail["list_title"] = list_title
            detail["list_date"] = date_str
            results.append(detail)
            time.sleep(0.3)

        time.sleep(1)

    print(f"\n总计: 列表 {total_listed} 条, 详情 {len(results)} 条", flush=True)
    return results


def output_jsonl(results, output_path):
    count = 0
    with open(output_path, "w", encoding="utf-8") as f:
        for r in results:
            item_id = hashlib.md5(r["source_url"].encode()).hexdigest()
            record = {
                "id": item_id,
                "title": r["title"] or r["list_title"],
                "site_name": SITE_NAME,
                "source_url": r["source_url"],
                "publish_date": r["publish_date"] or r["list_date"],
                "content": r["content"],
                "attachments": r["attachments"],
                "created_at": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
                "updated_at": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
            }
            f.write(json.dumps(record, ensure_ascii=False) + "\n")
            count += 1
    print(f"输出 {count} 条到 {output_path}", flush=True)
    return count


if __name__ == "__main__":
    import argparse

    parser = argparse.ArgumentParser(description=SITE_NAME)
    parser.add_argument("--pages", type=int, default=None, help="页数限制")
    parser.add_argument("--output", type=str, default=None, help="输出文件路径")
    args = parser.parse_args()

    max_pages = args.pages or TOTAL_PAGES
    out_path = args.output or f"output/{SITE_NAME.replace('-','_').replace(' ','')}.jsonl"

    results = crawl_pages(max_pages)
    if results:
        output_jsonl(results, out_path)
    else:
        print("无结果", flush=True)