# implement proxy argument

import os, requests, json, browser_cookie3, re, random
from ...typing import sha256, Dict, get_type_hints

url = 'https://bard.google.com'
model = ['Palm2']
supports_stream = False

def _create_completion(model: str, messages: list, stream: bool, **kwargs):
    psid = {cookie.name: cookie.value for cookie in browser_cookie3.chrome(
        domain_name='.google.com')}['__Secure-1PSID']
    
    formatted = '\n'.join([
        '%s: %s' % (message['role'], message['content']) for message in messages
    ])
    prompt = f'{formatted}\nAssistant:'

    proxy = None
    
    if proxy == None:
        raise Exception('Proxy is required for Bard (set in g4f/Provider/Providers/Bard.py line 18)')
    
    snlm0e = False
    conversation_id = None
    response_id = None
    choice_id = None

    client = requests.Session()
    client.proxies = {
        'http': f'https://{proxy}',
        'https': f'https://{proxy}'} if proxy else None

    client.headers = {
        'authority': 'bard.google.com',
        'content-type': 'application/x-www-form-urlencoded;charset=UTF-8',
        'origin': 'https://bard.google.com',
        'referer': 'https://bard.google.com/',
        'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36',
        'x-same-domain': '1',
        'cookie': f'__Secure-1PSID={psid}'
    }

    snlm0e = re.search(r'SNlM0e\":\"(.*?)\"',
                    client.get('https://bard.google.com/').text).group(1) if not snlm0e else snlm0e

    params = {
        'bl': 'boq_assistant-bard-web-server_20230326.21_p0',
        '_reqid': random.randint(1111, 9999),
        'rt': 'c'
    }

    data = {
        'at': snlm0e,
        'f.req': json.dumps([None, json.dumps([[prompt], None, [conversation_id, response_id, choice_id]])])}

    intents = '.'.join([
        'assistant',
        'lamda',
        'BardFrontendService'
    ])

    response = client.post(f'https://bard.google.com/_/BardChatUi/data/{intents}/StreamGenerate',
                        data=data, params=params)

    chat_data = json.loads(response.content.splitlines()[3])[0][2]
    if chat_data:
        json_chat_data = json.loads(chat_data)

        yield json_chat_data[0][0]
        
    else:
        yield 'error'

params = f'g4f.Providers.{os.path.basename(__file__)[:-3]} supports: ' + \
    '(%s)' % ', '.join([f"{name}: {get_type_hints(_create_completion)[name].__name__}" for name in _create_completion.__code__.co_varnames[:_create_completion.__code__.co_argcount]])