# -*- coding: utf-8 -*-
"""探测 UE_V2.instants"""
import sys, socket, json, time
sys.stdout.reconfigure(encoding='utf-8')
HOST = "localhost"; PORT = 28800
PAGE_ID = "05A421A861953C0FFB3712503B85EE82"

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=15):
    global _mid
    _mid += 1
    send(s, json.dumps({'id':_mid,'method':'Runtime.evaluate','params':{'expression':js,'returnByValue':True}}))
    s.settimeout(timeout)
    for _ in range(200):
        try:
            r = json.loads(recv(s))
            if r.get('id') == _mid:
                return r.get('result',{}).get('result',{}).get('value','')
        except: pass
    return ''

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

# 列出所有 UE 实例的 key、id、方法
r = cdp(s, """
var out=[];
if(window.UE_V2&&window.UE_V2.instants){
  var ks=Object.keys(window.UE_V2.instants);
  for(var k of ks){
    var inst=window.UE_V2.instants[k];
    if(inst){
      var methods=[];
      for(var m in inst){
        if(typeof inst[m]==='function'&&!m.startsWith('_'))methods.push(m);
      }
      out.push({key:k,id:inst.id,key2:inst.key,methods:methods.join(','),contentLen:(inst.getContent||function(){return ''})().length});
    }
  }
}
JSON.stringify(out)
""")
print("[UE instances]", r[:500] if r else 'empty')

# 测试 setContent
r = cdp(s, """
var inst=null;
if(window.UE_V2&&window.UE_V2.instants){
  var ks=Object.keys(window.UE_V2.instants);
  for(var k of ks){
    var i=window.UE_V2.instants[k];
    if(i&&i.key&&i.key.indexOf('content')>-1){inst=i;break;}
  }
  if(!inst&&ks.length>0)inst=window.UE_V2.instants[ks[0]];
}
if(inst){
  try{
    inst.setContent('<p>测试内容</p>');
    var len=inst.getContent().length;
    inst.setContent('');
    'ok len='+len+' methods:'+Object.keys(inst).filter(function(m){return typeof inst[m]==='function'&&!m.startsWith('_')}).join(',')
  }catch(e){'err:'+e.message}
}else{'no inst'}
""")
print("[setContent test]", r[:300] if r else 'empty')

s.close()
