from __future__ import annotations

import time

from ...typing import CreateResult, Messages
from ..base_provider import BaseProvider
from ..helper import WebDriver, format_prompt, get_browser

class Bard(BaseProvider):
    url = "https://bard.google.com"
    working = True
    needs_auth = True

    @classmethod
    def create_completion(
        cls,
        model: str,
        messages: Messages,
        stream: bool,
        proxy: str = None,
        browser: WebDriver = None,
        user_data_dir: str = None,
        headless: bool = True,
        **kwargs
    ) -> CreateResult:
        prompt = format_prompt(messages)
        driver = browser if browser else get_browser(user_data_dir, headless, proxy)

        from selenium.webdriver.common.by import By
        from selenium.webdriver.support.ui import WebDriverWait
        from selenium.webdriver.support import expected_conditions as EC

        try:
            driver.get(f"{cls.url}/chat")
            wait = WebDriverWait(driver, 10 if headless else 240)
            wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, "div.ql-editor.textarea")))
        except:
            # Reopen browser for login
            if not browser:
                driver.quit()
                driver = get_browser(None, False, proxy)
                driver.get(f"{cls.url}/chat")
                wait = WebDriverWait(driver, 240)
                wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, "div.ql-editor.textarea")))
            else:
                raise RuntimeError("Prompt textarea not found. You may not be logged in.")

        try:
            # Add hook in XMLHttpRequest
            script = """
const _http_request_open = XMLHttpRequest.prototype.open;
window._message = "";
XMLHttpRequest.prototype.open = function(method, url) {
    if (url.includes("/assistant.lamda.BardFrontendService/StreamGenerate")) {
        this.addEventListener("load", (event) => {
            window._message = JSON.parse(JSON.parse(this.responseText.split("\\n")[3])[0][2])[4][0][1][0];
        });
    }
    return _http_request_open.call(this, method, url);
}
"""
            driver.execute_script(script)

            # Submit prompt
            driver.find_element(By.CSS_SELECTOR, "div.ql-editor.ql-blank.textarea").send_keys(prompt)
            driver.find_element(By.CSS_SELECTOR, "button.send-button").click()

            # Yield response
            while True:
                chunk = driver.execute_script("return window._message;")
                if chunk:
                    yield chunk
                    return
                else:
                    time.sleep(0.1)
        finally:
            if not browser:
                driver.close()
                time.sleep(0.1)
                driver.quit()