# -*- coding: utf-8 -*-
"""用 CDP 协议直接操作 file input"""
import sys, socket, json, time, base64, os, glob
from base64 import b64encode
sys.stdout.reconfigure(encoding='utf-8')
HOST = "localhost"; PORT = 28800
PAGE_ID = "70039F329097C14448996F189E3A42A1"

IMG_LIST = glob.glob(r'D:\wxpic\*.jpg') + glob.glob(r'D:\wxpic\*.png')
IMG_PATH = max(IMG_LIST, key=os.path.getmtime) if IMG_LIST else None
with open(IMG_PATH, 'rb') as f:
    IMG_B64 = b64encode(f.read()).decode()
ext = os.path.splitext(IMG_PATH)[1].lower()
IMG_MIME = 'image/jpeg' if ext in ['.jpg','.jpeg'] else 'image/png'
print("[INFO] 图片:", IMG_PATH, "size:", len(IMG_B64))

def ws():
    import urllib.parse
    u = "ws://%s:%s/devtools/page/%s" % (HOST, PORT, PAGE_ID)
    p = urllib.parse.urlparse(u)
    s = socket.create_connection((p.hostname, p.port or 80), timeout=15)
    req = ("GET %s HTTP/1.1\r\nHost: %s:%s\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==\r\nSec-WebSocket-Version: 13\r\n\r\n" % (p.path, p.hostname, p.port))
    s.send(req.encode())
    resp = b''
    while b'\r\n\r\n' not in resp: resp += s.recv(4096)
    return s

def send(s, d):
    d = d.encode('utf-8'); n = len(d); m = b'\x01\x02\x03\x04'
    if n <= 125: h = bytes([0x81, n|0x80]) + m
    elif n <= 65535: h = bytes([0x81, 0xFE]) + n.to_bytes(2,'big') + m
    else: h = bytes([0x81, 0xFF]) + n.to_bytes(8,'big') + m
    s.send(h + bytes(d[i]^m[i%4] for i in range(n)))

def recv(s):
    def rx(n):
        b = b''
        while len(b) < n: b += s.recv(n-len(b))
        return b
    h = rx(2); n = h[1]&0x7f
    if n == 126: n = int.from_bytes(rx(2),'big')
    elif n == 127: n = int.from_bytes(rx(8),'big')
    return rx(n).decode('utf-8')

_mid = 0
def cdp(s, js, timeout=20):
    global _mid
    _mid += 1
    send(s, json.dumps({'id':_mid,'method':'Runtime.evaluate','params':{'expression':js,'returnByValue':True}}))
    s.settimeout(timeout)
    for _ in range(300):
        try:
            r = json.loads(recv(s))
            if r.get('id') == _mid:
                return r.get('result',{}).get('result',{}).get('value','')
        except: pass
    return ''

_mid2 = 0
def cdp_cmd(s, method, params, timeout=20):
    global _mid2
    _mid2 += 1
    send(s, json.dumps({'id':_mid2,'method':method,'params':params}))
    s.settimeout(timeout)
    for _ in range(300):
        try:
            r = json.loads(recv(s))
            if r.get('id') == _mid2:
                return r
        except: pass
    return None

s = ws()
print("[OK] Connected\n")

# 找封面 file input（第一个图片 input，index 1）
print("[Step 1] 找封面 input...")
r = cdp(s, """
(function() {
  var inputs = document.querySelectorAll('input[type=file]');
  var result = [];
  for (var i = 0; i < inputs.length; i++) {
    var inp = inputs[i];
    var accept = inp.accept || '';
    var rect = inp.getBoundingClientRect();
    result.push({index: i, accept: accept, w: Math.round(rect.width), h: Math.round(rect.height)});
  }
  return JSON.stringify(result);
})()
""")
print("  file inputs:", r[:300] if r else 'empty')

# 用 CDP DOM.getDocument + DOM.querySelectorAll 找 input 的 nodeId
print("\n[Step 2] 用 CDP DOM 找 nodeId...")
r = cdp_cmd(s, 'DOM.getDocument', {'depth': 1, 'pierce': True})
print("  root:", r.get('result', {}).get('nodeId', 'N/A') if r else 'N/A')

# querySelectorAll css 选择器
r = cdp_cmd(s, 'DOM.querySelectorAll', {'nodeId': 1, 'selector': 'input[type=file]:not([accept*="video"])'})
print("  querySelectorAll result:", r)

s.close()
