#!/usr/bin/env python3
import os
"""
Crawler for 广东宇新能源科技股份有限公司 - 信息公示
CMS: Zonetouch, static .html pages
Site: www.yussen.com.cn/news-10-1.html
"""
import requests, re, json, sys, os, tempfile
from datetime import datetime, timedelta
from bs4 import BeautifulSoup
import urllib.parse

BASE_URL = "http://www.yussen.com.cn"
CAT_ID = "10"
LIST_TPL = BASE_URL + "/news-{}-{}.html"
SITE_NAME = "宇新能源-信息公示"
INCREMENTAL_DAYS = 7
MAX_PAGES = 5
PER_PAGE = 8

HEADERS = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 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,en;q=0.8",
}
TIMEOUT = 20

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


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 fetch(url):
    resp = session.get(url, timeout=TIMEOUT)
    resp.encoding = "utf-8"
    return resp.text


def parse_list(html):
    """Parse list page, return list of (title, url, date)."""
    soup = BeautifulSoup(html, "html.parser")
    items = []
    # Find the list ul in chanping-liebiao
    div = soup.find("div", class_="chanping-liebiao")
    if not div:
        return items
    ul = div.find("ul")
    if not ul:
        return items
    for li in ul.find_all("li"):
        a = li.find("a", href=True)
        span = li.find("span")
        if not a or not span:
            continue
        href = a["href"].strip()
        title = a.get_text(strip=True)
        date = span.get_text(strip=True)
        if not title or not href:
            continue
        # Resolve URL
        if not href.startswith("http"):
            if href.startswith("/"):
                href = BASE_URL + href
            else:
                href = BASE_URL + "/" + href
        items.append((title.strip(), href, date))
    return items


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

    title = ""
    pub_date = ""
    content_html = ""

    neiro = soup.find("div", class_="xiangqing_neiro")
    if neiro:
        # Title: first <p class="p03">
        p_title = neiro.find("p", class_="p03")
        if p_title:
            title = p_title.get_text(strip=True)

        # Date: second <p class="p04">发布时间：2026-05-25 17:31:57
        p_date = neiro.find("p", class_="p04")
        if p_date:
            date_text = p_date.get_text(strip=True)
            m = re.search(r'(\d{4}-\d{2}-\d{2})', date_text)
            if m:
                pub_date = m.group(1)

        # Content: all rest of the children except the first two <p> tags
        content_parts = []
        found_first = False
        found_second = False
        for child in neiro.children:
            if child.name == "p":
                if not found_first and child.get("class") == ["p03"]:
                    found_first = True
                    continue
                if not found_second and child.get("class") == ["p04"]:
                    found_second = True
                    continue
            content_parts.append(str(child))
        content_html = "".join(content_parts)

    # Attachments: look for file links in content
    attachments = []
    if content_html:
        csoup = BeautifulSoup(content_html, "html.parser")
        for a in csoup.find_all("a", href=True):
            ahref = a["href"].strip().lower()
            if any(ext in ahref for ext in [".pdf", ".doc", ".docx", ".xls", ".xlsx", ".zip", ".rar"]):
                attachments.append({
                    "title": a.get_text(strip=True) or "附件",
                    "url": a["href"]
                })

    return {
        "title": title,
        "date": pub_date,
        "content": content_html,
        "attachments": attachments,
        "source_url": url,
    }


def render_content(content_html, title, url):
    """Convert HTML to readable text."""
    if not content_html or len(content_html.strip()) < 50:
        return "[{}]({})".format(title, url)

    soup = BeautifulSoup(content_html, "html.parser")
    parts = []

    for el in soup.children:
        if el.name is None:
            text = el.strip()
            if text:
                parts.append(text)
        elif el.name == "p":
            text = el.get_text(" ", strip=True)
            if text:
                parts.append(text)
        if el.name == 'table':
            parts.append(html_table_to_html(el, url))
        elif el.name == "br":
            parts.append("")
        elif el.name == "div":
            text = el.get_text(" ", strip=True)
            if text:
                parts.append(text)
        elif el.name == "a":
            href = el.get("href", "")
            text = el.get_text(strip=True)
            if text and href and not href.startswith("javascript"):
                parts.append("[{}]({})".format(text, href))

    result = "\n\n".join(p for p in parts if p).strip()
    result = re.sub(r"\n{3,}", "\n\n", result)

    if len(result.strip()) < 20:
        return "[{}]({})".format(title, url)
    return result


def is_incremental():
    return len(sys.argv) > 1 and sys.argv[1] == "incremental"


def main():
    incremental = is_incremental()
    print("[{}] Starting crawl (incremental={}, max_pages={})".format(SITE_NAME, incremental, MAX_PAGES))

    # Fetch list pages
    all_items = []
    for page in range(1, MAX_PAGES + 1):
        page_url = LIST_TPL.format(CAT_ID, page)
        print("  Fetching page {}: {}".format(page, page_url))
        try:
            html = fetch(page_url)
        except Exception as e:
            print("    ERROR: {}".format(e))
            continue
        items = parse_list(html)
        print("    Found {} items".format(len(items)))
        if not items:
            break
        all_items.extend(items)

    print("\n  Total items from list: {}".format(len(all_items)))
    if not all_items:
        print("  No items found, exiting")
        return

    # Incremental filter
    cutoff_date = None
    if incremental:
        cutoff_date = datetime.now() - timedelta(days=INCREMENTAL_DAYS)
        print("  Incremental mode: cutoff = {}".format(cutoff_date.date()))
        filtered = [(t, u, d) for t, u, d in all_items if d and _date_filter(d, cutoff_date)]
        all_items = filtered
        print("  After incremental filter: {} items".format(len(all_items)))

    # Fetch details
    results = []
    for idx, (title, url, date_from_list) in enumerate(all_items):
        print("  [{}/{}] Fetching: {}...".format(idx + 1, len(all_items), title[:40]))
        try:
            html = fetch(url)
        except Exception as e:
            print("    ERROR: {}".format(e))
            results.append({
                "title": title, "date": date_from_list,
                "content": "[{}]({})".format(title, url),
                "attachments": [], "source_url": url,
            })
            continue

        detail = parse_detail(html, url)
        if not detail["title"]:
            detail["title"] = title
        if not detail["date"]:
            detail["date"] = date_from_list

        detail["content"] = render_content(detail["content"], detail["title"], url)
        results.append(detail)

    print("\n  Total valid items: {}".format(len(results)))
    if not results:
        print("  No items to import, exiting")
        return

    # Write JSONL
    tmp = tempfile.NamedTemporaryFile(mode="w", suffix=".jsonl", delete=False, dir="/tmp")
    label = "{} ({}条)".format(SITE_NAME, len(results))
    for r in results:
        line = {
            "title": r["title"],
            "page_url": r["source_url"],
            "content": r["content"],
            "publish_date": r["date"],
            "site_name": SITE_NAME,
            "source_url": r["source_url"],
            "attachments": r.get("attachments", []),
        }
        tmp.write(json.dumps(line, ensure_ascii=False) + "\n")
    tmp.close()
    print("  JSONL written: {}".format(tmp.name))

    # Import
    ret = os.system("python3 /root/gov_crawler/import_jsonl.py '{}' '{}'".format(tmp.name, label))
    if ret == 0:
        print("  OK Import complete")
    else:
        print("  FAIL Import failed (exit={})".format(ret))
        sys.exit(1)



def _date_filter(date_str, cutoff):
    try:
        d = datetime.strptime(date_str, "%Y-%m-%d")
        return d >= cutoff
    except ValueError:
        return True


if __name__ == "__main__":
    main()