# -*- coding: utf-8 -*-
"""검출된 본문이미지가 '진짜 사진'인지 크기로 검증. 아이콘·작은배너·서명 제외.
기준: 가로>=250 AND 세로>=250 (또는 한 변>=400) 그리고 용량>=12KB → 사진으로 인정.
JPEG/PNG/GIF 헤더만 읽어 치수 파악(전체 다운로드 최소화는 생략, 작은파일이라 통째 읽음).
사용: python _imgcheck.py "<json: [[행,menuCd,라벨], ...]>"  (해당 보드 본문이미지 표본 검사)
"""
import urllib.request, ssl, re, html as ht, sys, json, struct, io

ctx=ssl.create_default_context(); ctx.check_hostname=False; ctx.verify_mode=ssl.CERT_NONE
BASE='https://www.gimje.go.kr'

def get_bytes(url):
    req=urllib.request.Request(url, headers={'User-Agent':'Mozilla/5.0'})
    return urllib.request.urlopen(req,context=ctx,timeout=25).read()

def get(url):
    return get_bytes(url).decode('utf-8','replace')

def img_size(data):
    """(w,h) from JPEG/PNG/GIF bytes, else (None,None)."""
    if data[:8]==b'\x89PNG\r\n\x1a\n':
        w,h=struct.unpack('>II', data[16:24]); return w,h
    if data[:3]==b'GIF':
        w,h=struct.unpack('<HH', data[6:10]); return w,h
    if data[:2]==b'\xff\xd8':  # JPEG
        i=2
        while i<len(data)-9:
            if data[i]!=0xFF: i+=1; continue
            m=data[i+1]
            if m in (0xC0,0xC1,0xC2,0xC3,0xC5,0xC6,0xC7,0xC9,0xCA,0xCB):
                h,w=struct.unpack('>HH', data[i+5:i+9]); return w,h
            seg=struct.unpack('>H', data[i+2:i+4])[0]; i+=2+seg
    return None,None

def is_real_photo(url):
    if url.startswith('/'): url=BASE+url
    try:
        data=get_bytes(url)
    except Exception as ex:
        return None, f'ERR {ex}'
    w,h=img_size(data); kb=len(data)//1024
    if w is None: return None, f'치수불명 {kb}KB'
    real = (kb>=12) and ((w>=250 and h>=250) or max(w,h)>=400)
    return real, f'{w}x{h} {kb}KB'

# 본문이미지 추출(스캐너와 동일 규칙)
def view_links(menucd):
    d=get(f'{BASE}/index.gimje?menuCd={menucd}')
    out=[]
    for l in re.findall(r'href="(/board/view\.gimje\?[^"]+)"', d):
        l=ht.unescape(l)
        if l not in out: out.append(l)
    return out

def body_content_imgs(det):
    s=det.find('bbs_view')
    if s<0: s=det.find('bbs_con')
    if s<0: return []
    ends=[p for p in (det.find('bbs_file',s),det.find('bbs_btn',s),det.find('bbs_navi',s),det.find('bbs_paging',s)) if p>0]
    seg=det[s:(min(ends) if ends else s+12000)]
    out=[]
    for i in re.findall(r'<img[^>]+src="([^"]+)"', seg):
        i=i.strip(); low=i.lower()
        if '/images/common/' in low or 'opentype' in low: continue
        if any(k in low for k in ('icon','emoticon','blank.','spacer','btn_','/common/','logo')): continue
        if '/upload_data/' in low or '/editor' in low or 'board_data' in low or '/se2/' in low:
            out.append(i)
    return out

if __name__=='__main__':
    targets=json.loads(sys.argv[1])
    for row,menucd,label in targets:
        links=view_links(menucd)[:10]
        photo_posts=0; checked_imgs=[]
        for l in links:
            try: det=get(BASE+l)
            except: continue
            imgs=body_content_imgs(det)
            postreal=False
            for im in imgs[:2]:
                real,info=is_real_photo(im)
                checked_imgs.append((real,info,im.split('/')[-1][:24]))
                if real: postreal=True
            if postreal: photo_posts+=1
        verdict='어문,이미지' if photo_posts>0 else '어문'
        print(f'행{row} | {label[:28]} | 진짜사진게시물 {photo_posts} → {verdict}')
        for real,info,nm in checked_imgs[:5]:
            mark='📷' if real else ('?' if real is None else '🔸아이콘')
            print(f'    {mark} {info} {nm}')