# -*- coding: utf-8 -*-
import socket, json, urllib.request, urllib.parse

HOST = 'localhost'
PORT = 9223

pages = json.loads(urllib.request.urlopen(f'http://{HOST}:{PORT}/json').read())
page_id = [p['id'] for p in pages if 'baijiahao.baidu.com' in p['url']][0]

ws_url = f'ws://{HOST}:{PORT}/devtools/page/{page_id}'
parsed = urllib.parse.urlparse(ws_url)
sock = socket.create_connection((parsed.hostname, parsed.port or 80), timeout=15)
key = 'dGhlIHNhbXBsZSBub25jZQ=='
handshake = f'GET {parsed.path} HTTP/1.1\r\nHost:{parsed.hostname}:{parsed.port}\r\nUpgrade:websocket\r\nConnection:Upgrade\r\nSec-WebSocket-Key:{key}\r\nSec-WebSocket-Version:13\r\n\r\n'
sock.send(handshake.encode())
resp = b''
while b'\r\n\r\n' not in resp:
    resp += sock.recv(4096)

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

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

# 1. 检查 textarea 正文
expr = """
(function(){
    var ta = document.querySelector('textarea._9ddb7e475b559749-simulator');
    if(ta) return 'textarea value length: ' + ta.value.length + ' | first 100: ' + ta.value.substring(0,100);
    return 'textarea not found';
})()
"""
send(sock, {'id':1,'method':'Runtime.evaluate','params':{'expression':expr}})
r = recv(sock)
print('正文 textarea:', json.loads(r)['result']['result']['value'])

# 2. 查找真正的标题输入 - 按位置找最上面的输入框
expr2 = """
(function(){
    var results = [];
    // 查找所有可能用于输入的元素
    var inputs = document.querySelectorAll('input, textarea');
    for(var el of inputs){
        var rect = el.getBoundingClientRect();
        if(rect.top > 0 && rect.top < 300){ // 页面顶部区域
            results.push({
                tag: el.tagName,
                type: el.type,
                class: el.className ? el.className.toString().substring(0,50) : '',
                placeholder: el.placeholder || el.getAttribute('placeholder') || '',
                top: rect.top,
                value: el.value ? el.value.substring(0,30) : ''
            });
        }
    }
    return JSON.stringify(results);
})()
"""
send(sock, {'id':2,'method':'Runtime.evaluate','params':{'expression':expr2}})
r2 = recv(sock)
print('页面顶部输入元素:', json.loads(r2)['result']['result']['value'])

# 3. 查看 DOM 结构 - 找 titleWrap
expr3 = """
(function(){
    var wrap = document.querySelector('[class*="titleWrap"]');
    if(wrap){
        var children = [];
        for(var i=0; i<wrap.children.length; i++){
            var c = wrap.children[i];
            children.push({
                tag: c.tagName,
                class: c.className ? c.className.toString().substring(0,50) : '',
                innerHTML: c.innerHTML ? c.innerHTML.substring(0,50) : ''
            });
        }
        return 'titleWrap found, children: ' + JSON.stringify(children);
    }
    return 'titleWrap not found';
})()
"""
send(sock, {'id':3,'method':'Runtime.evaluate','params':{'expression':expr3}})
r3 = recv(sock)
print('titleWrap:', json.loads(r3)['result']['result']['value'])

sock.close()
