#!/usr/bin/env python3
"""Crawl 修水县 - 项目环评
https://www.xiushui.gov.cn/fdzdxxgk/01/04/04/11/03/
"""
import requests, re, sqlite3, sys, time, hashlib
from datetime import datetime, timedelta
from bs4 import BeautifulSoup
import os

DB_PATH = os.getenv("SEARCH_DB", "/root/search.db")
SITE_NAME = '修水县 - 项目环评'
BASE_URL = 'https://www.xiushui.gov.cn'
LIST_URL = 'https://www.xiushui.gov.cn/fdzdxxgk/01/04/04/11/03/'
CUTOFF_DATE = (datetime.now() - timedelta(days=3*365)).strftime('%Y-%m-%d')
MAX_PAGES = 5

HEADERS = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
}
session = requests.Session()
session.headers.update(HEADERS)

def parse_list(html):
    items = []
    soup = BeautifulSoup(html, 'html.parser')
    table_div = soup.find('div', id='tableList')
    if not table_div:
        return items
    table = table_div.find('table')
    if not table:
        return items
    rows = table.find_all('tr')
    for tr in rows[1:]:  # skip header
        cells = tr.find_all('td')
        if len(cells) < 3:
            continue
        a = cells[1].find('a', href=True)
        if not a:
            continue
        href = a['href']
        if not href.startswith('http'):
            href = BASE_URL + href if href.startswith('/') else BASE_URL + '/' + href
        title = a.get('title') or a.get_text(strip=True)
        date = cells[2].get_text(strip=True)
        if title and date:
            items.append({'title': title.strip(), 'url': href, 'date': date})
    return items

def fetch_detail(url):
    try:
        resp = session.get(url, timeout=30)
        resp.encoding = 'utf-8'
        html = resp.text
    except:
        return '', '', ''

    # Title from meta
    tm = re.search(r'<meta name="ArticleTitle" content="([^"]*)"', html)
    title = tm.group(1).strip() if tm else ''

    # Date from meta
    dm = re.search(r'<meta name="PubDate" content="([^"]*)"', html)
    date_str = dm.group(1)[:10] if dm else ''

    # Content from div#article-box
    m = re.search(r'<div class="view TRS_UEDITOR[^>]* id="article-box">(.*?)</div>\s*</div>\s*</font>', html, re.DOTALL)
    if not m:
        m = re.search(r'<div[^>]* id="article-box"[^>]*>(.*?)</div>\s*</div>\s*</font>', html, re.DOTALL)
    if not m:
        m = re.search(r'<font[^>]* id="Zoom"[^>]*>(.*?)</font>', html, re.DOTALL)

    if m:
        content_raw = m.group(1).strip()
        content_raw = re.sub(r'<script[^>]*>.*?</script>', '', content_raw, flags=re.DOTALL|re.I)
        content_raw = re.sub(r'<style[^>]*>.*?</style>', '', content_raw, flags=re.DOTALL|re.I)
        return title, date_str, content_raw.strip()

    return title, date_str, ''

def get_page_url(pg):
    if pg == 1:
        return LIST_URL
    return f'{LIST_URL}index_{pg-1}.html'

def main():
    is_incremental = 'incremental' in sys.argv
    print(f'=== {SITE_NAME} ===')

    conn = sqlite3.connect(DB_PATH)
    c = conn.cursor()
    inserted, skipped, old_total = 0, 0, 0
    max_pages = 1 if is_incremental else MAX_PAGES
    consecutive_old = 0
    min_pages = 5
    start_time = time.time()

    for pg in range(1, max_pages + 1):
        list_url = get_page_url(pg)
        try:
            resp = session.get(list_url, timeout=30)
            resp.encoding = 'utf-8'
            raw_html = resp.text
        except Exception as e:
            print(f'  [ERROR] Page {pg}: {e}')
            time.sleep(2)
            continue

        items = parse_list(raw_html)
        if not items:
            print(f'  Page {pg}: 0 items (end)')
            break

        all_old = all(item['date'] < CUTOFF_DATE for item in items if item['date'])
        if all_old:
            consecutive_old += 1
            if consecutive_old >= 2 and pg >= min_pages:
                print(f'  Page {pg}: all old, stopping')
                break
        else:
            consecutive_old = 0

        for item in items:
            if item['date'] and item['date'] < CUTOFF_DATE:
                old_total += 1
                continue

            has = c.execute("SELECT 1 FROM gov_raw WHERE page_url=? AND content IS NOT NULL AND content!=''", (item['url'],)).fetchone()
            if has:
                skipped += 1
                continue

            try:
                title, date_str, content = fetch_detail(item['url'])
            except Exception as e:
                print(f'  [ERROR] Detail: {e}')
                time.sleep(1)
                skipped += 1
                continue

            final_title = title or item['title']
            final_date = date_str or item['date']
            int_id = int(hashlib.md5(item['url'].encode()).hexdigest()[:15], 16) % (2**63)
            date_rank = int(final_date.replace('-', '')) if final_date else 0
            summary = re.sub(r'<[^>]+>', '', content)[:200] if content else final_title
            summary = re.sub(r'\s+', ' ', summary).strip()

            try:
                c.execute(
                    'INSERT OR IGNORE INTO gov_raw(id, site_name, source_url, page_url, title, publish_date, content, summary, date_rank) VALUES(?,?,?,?,?,?,?,?,?)',
                    (int_id, SITE_NAME, item['url'], item['url'], final_title, final_date, content, summary, date_rank)
                )
                if c.rowcount > 0:
                    inserted += 1
            except Exception as e:
                print(f'  [DB] {e}')
                skipped += 1
            time.sleep(0.3)

        elapsed = time.time() - start_time
        print(f'  Page {pg}/{max_pages}: +{inserted} (skipped {skipped}, >3y {old_total}) [{elapsed:.0f}s]')

    conn.commit()
    # FTS rebuild
    try:
        c2 = conn.cursor()
        c2.execute("DELETE FROM gov_search WHERE rowid IN (SELECT id FROM gov_raw WHERE site_name=?)", (SITE_NAME,))
        rows = c2.execute("SELECT id, title, site_name, summary FROM gov_raw WHERE site_name=?", (SITE_NAME,)).fetchall()
        for r in rows:
            c2.execute("INSERT OR IGNORE INTO gov_search(rowid, title, site_name, summary) VALUES(?,?,?,?)", r)
        conn.commit()
        print(f'  FTS: {len(rows)} records rebuilt')
    except Exception as e:
        print(f'  FTS error: {e}')
    conn.close()
    elapsed = time.time() - start_time
    print(f'\nDone ({elapsed:.0f}s). Inserted {inserted}, Skipped {skipped}, Old {old_total}')

if __name__ == '__main__':
    main()