#!/usr/bin/env python3
"""铜仁市生态环境局 - 拟审批公示"""
import re, sys, os, json
import urllib.request, urllib.error
from bs4 import BeautifulSoup
import sqlite3

BASE_URL = "https://sthjj.trs.gov.cn"
LIST_URL = BASE_URL + "/xzsp/nspgs/"
SITE_NAME = "铜仁市-拟审批公示"
SITE_DISPLAY = "铜仁市生态环境局"
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

# ─── 正文取文本（2026-09-11）：行内节点直接拼接，只在块级边界 / <br> 处换行 ───
# ⚠️ 不要用 el.get_text("\n") 取正文 —— 它是「每个**文本节点**之间插 \n」，Word 粘贴的
#    公文把一行拆成 <span>提取码：</span>pwaj<span>。查阅…</span>，这些行内节点于是各自
#    成行（福泉 id=2095080103703914437 实例：`提取码：`/`pwaj`/`。查阅…` 各占一行）。
_BLOCK_TAGS = {'address', 'article', 'aside', 'blockquote', 'details', 'dialog', 'dd', 'div',
               'dl', 'dt', 'fieldset', 'figcaption', 'figure', 'footer', 'form', 'h1', 'h2',
               'h3', 'h4', 'h5', 'h6', 'header', 'hgroup', 'hr', 'li', 'main', 'nav', 'ol',
               'p', 'pre', 'section', 'table', 'tbody', 'thead', 'tfoot', 'tr', 'td', 'th',
               'ul', 'center', 'caption'}


def body_text(el):
    """块级边界出换行、行内节点直接拼接、<br> 出换行（≈ 浏览器看到的换行结构）。"""
    if el is None:
        return ''
    import re as _re
    from bs4 import NavigableString
    out = []

    def walk(node):
        for ch in node.children:
            if isinstance(ch, NavigableString):
                out.append(str(ch))
            elif getattr(ch, 'name', None) == 'br':
                out.append('\n')
            elif getattr(ch, 'name', None) in _BLOCK_TAGS:
                out.append('\n')
                walk(ch)
                out.append('\n')
            else:
                walk(ch)
    walk(el)
    t = ''.join(out)
    t = _re.sub(r'[ \t\r\f\v]*\n[ \t\r\f\v]*', '\n', t)
    t = _re.sub(r'\n{3,}', '\n\n', t)
    return t.strip()


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"""
    import urllib.parse
    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):
    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):
    """Extract items from a list page"""
    soup = BeautifulSoup(html, "html.parser")
    items = []
    for li in soup.select("ul.NewsList > li"):
        a = li.find("a", href=True)
        if not a:
            continue
        href = a["href"].strip()
        title = a.get("title", "") or a.get_text(strip=True)
        date_span = li.find("span")
        date_text = date_span.get_text(strip=True) if date_span else ""
        if 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):
    """Get total pages from createPageHTML script"""
    m = re.search(r'createPageHTML\((\d+),\s*\d+,\s*"index', html)
    if m:
        return int(m.group(1))
    return None

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

    title = ""
    title_div = soup.select_one("div.ArticleTitle")
    if title_div:
        title = title_div.get_text(strip=True)
    if not title:
        meta_title = soup.find("meta", attrs={"name": "ArticleTitle"})
        if meta_title and meta_title.get("content"):
            title = meta_title["content"].strip()
    if not title and soup.title:
        title = soup.title.string.strip()

    date_text = ""
    meta_date = soup.find("meta", attrs={"name": "PubDate"})
    if meta_date and meta_date.get("content"):
        m = re.search(r"(\d{4}-\d{2}-\d{2})", meta_date["content"])
        if m:
            date_text = m.group(1)

    zoom = soup.find("font", id="Zoom")
    if not zoom:
        zoom = soup.select_one("font#Zoom")
    if not zoom:
        content_div = soup.select_one("div.Article_Con")
        if content_div:
            zoom = content_div.find("font", id="Zoom")

    if not zoom:
        zoom = soup.select_one("div.trs_editor_view")

    if not zoom:
        return {"title": title, "date": date_text, "content": "", "attachments": []}

    attachments = []
    parts = []

    # Bare text directly under zoom (no p/pre/table wrappers, only <br>)
    bare_text = zoom.get_text(" ", strip=True)
    if bare_text and not zoom.find(["p", "pre", "table", "img"]):
        for a in zoom.find_all("a", href=True, appendix=True):
            href = a["href"].strip()
            atitle = a.get_text(strip=True) or a.get("download", "")
            oldsrc = a.get("OLDSRC", "")
            if oldsrc:
                ahref = (BASE_URL + oldsrc) if oldsrc.startswith("/") else (url.rsplit("/", 1)[0] + "/" + oldsrc)
            else:
                if href.startswith("./"):
                    ahref = url.rsplit("/", 1)[0] + "/" + href[2:]
                elif href.startswith("/"):
                    ahref = BASE_URL + href
                elif href.startswith("http"):
                    ahref = href
                else:
                    ahref = url.rsplit("/", 1)[0] + "/" + href
            attachments.append({"title": atitle, "url": ahref})
        parts.append(bare_text)

    for el in zoom.find_all(["p", "pre", "table", "img"], recursive=True):
        if el.name in ("p", "pre") and el.find_parent("table") and el.name == "p":
            continue
        if el.name == "table" and el.find_parent("table"):
            continue

        if el.name in ("p", "pre"):
            text = el.get_text(" ", strip=True)
            if el.name == "pre":
                text = body_text(el)
            for a in el.find_all("a", href=True, appendix=True):
                href = a["href"].strip()
                atitle = a.get_text(strip=True) or a.get("download", "")
                oldsrc = a.get("OLDSRC", "")
                if oldsrc:
                    if oldsrc.startswith("/"):
                        ahref = BASE_URL + oldsrc
                    elif oldsrc.startswith("http"):
                        ahref = oldsrc
                    else:
                        ahref = url.rsplit("/", 1)[0] + "/" + oldsrc
                else:
                    if href.startswith("./"):
                        ahref = url.rsplit("/", 1)[0] + "/" + href[2:]
                    elif href.startswith("/"):
                        ahref = BASE_URL + href
                    elif href.startswith("http"):
                        ahref = href
                    else:
                        ahref = url.rsplit("/", 1)[0] + "/" + href
                attachments.append({"title": atitle, "url": ahref})
            if text:
                parts.append(text)

        elif el.name == 'table':
            tbl_html = html_table_to_html(el, url)
            if tbl_html:
                parts.append(tbl_html)
        elif el.name == "img":
            src = el.get("src", "")
            alt = el.get("alt", "")
            if src:
                if src.startswith("//"):
                    src = "https:" + src
                elif src.startswith("/"):
                    src = BASE_URL + src
                elif not src.startswith("http"):
                    src = url.rsplit("/", 1)[0] + "/" + src
                if alt:
                    parts.append(f'<a href="{src}" target="_blank">{alt}</a>')
                else:
                    parts.append(f'<a href="{src}" target="_blank">图片</a>')

    for a in zoom.find_all("a", href=True):
        href = a["href"].strip()
        if (re.search(r'\.(pdf|docx?|xlsx?|rar|zip)$', href, re.I) or href.startswith("http")) and not a.get("appendix"):
            atitle = a.get_text(strip=True) or a.get("download", "")
            if atitle and href != "./" and not any(att["url"].endswith(href.split("/")[-1]) for att in attachments):
                oldsrc = a.get("OLDSRC", "")
                if oldsrc:
                    ahref = (BASE_URL + oldsrc) if oldsrc.startswith("/") else (url.rsplit("/", 1)[0] + "/" + oldsrc)
                else:
                    if href.startswith("./"):
                        ahref = url.rsplit("/", 1)[0] + "/" + href[2:]
                    elif href.startswith("/"):
                        ahref = BASE_URL + href
                    elif href.startswith("http"):
                        ahref = href
                    else:
                        ahref = url.rsplit("/", 1)[0] + "/" + href
                attachments.append({"title": atitle, "url": ahref})

    # Fallback: pure external-link notices (no p/pre/table/img) -> body = URL paragraph
    if not parts and zoom:
        link_paras = []
        for a in zoom.find_all("a", href=True):
            href = a["href"].strip()
            if href.startswith("http") and "javascript" not in href:
                atitle = a.get_text(strip=True) or a.get("download", "") or href
                if href.startswith("./"):
                    ahref = url.rsplit("/", 1)[0] + "/" + href[2:]
                elif href.startswith("/"):
                    ahref = BASE_URL + href
                else:
                    ahref = href
                link_paras.append(f'<p><a href="{ahref}" target="_blank">{atitle}</a></p>')
        if link_paras:
            parts = link_paras

    seen = set()
    unique_attachments = []
    for att in attachments:
        if att["url"] not in seen:
            seen.add(att["url"])
            unique_attachments.append(att)

    content = "\n\n".join(parts)
    return {"title": title, "date": date_text, "content": content, "attachments": unique_attachments}


def main():
    html = fetch(LIST_URL)
    if not html:
        print("[ERROR] Cannot fetch list page", file=sys.stderr)
        sys.exit(1)

    total_pages = get_total_pages(html)
    if total_pages is None:
        soup = BeautifulSoup(html, "html.parser")
        total_pages = 1
        for a in soup.select("div.page a"):
            m = re.search(r'index_(\d+)\.html', a.get("href", ""))
            if m:
                p = int(m.group(1)) + 1
                if p > total_pages:
                    total_pages = p

    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(total_pages):
        if pg == 0:
            url = LIST_URL
        else:
            url = f"{LIST_URL}index_{pg}.html"
        print(f"[INFO] Fetching page {pg+1}/{total_pages}: {url}", file=sys.stderr)
        html = fetch(url)
        if not html:
            print(f"[WARN] Empty response for page {pg+1}", file=sys.stderr)
            continue
        items = extract_items(html)
        print(f"[INFO] Found {len(items)} items on page {pg+1}", file=sys.stderr)
        all_items.extend(items)

    print(f"[INFO] Total items from list: {len(all_items)}", file=sys.stderr)

    conn = sqlite3.connect(DB, timeout=60)
    c = conn.cursor()

    new_count = 0
    empty_content = 0
    total_attachments = 0

    for item in all_items:
        c.execute("SELECT id FROM gov_raw WHERE page_url=?", (item["url"],))
        if c.fetchone():
            continue

        print(f"[INFO] Fetching detail: {item['title'][:50]}...", file=sys.stderr)
        html = fetch(item["url"])
        if not html:
            print(f"[WARN] Cannot fetch detail, skipping: {item['url']}", file=sys.stderr)
            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'<[^>]+>', '', content)
        plain = re.sub(r'\s+', ' ', plain).strip()
        summary = plain[:200] if plain else ""

        if not content:
            empty_content += 1
            print(f"[WARN] Empty content: {title}", file=sys.stderr)

        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()