from __future__ import annotations

import os
import time
import random
from urllib.parse import urlparse
from typing import Iterator
from http.cookies import Morsel
from pathlib import Path
import asyncio
try:
    from curl_cffi.requests import Session, Response
    from .curl_cffi import StreamResponse, StreamSession, FormData
    has_curl_cffi = True
except ImportError:
    from typing import Type as Response
    from .aiohttp import StreamResponse, StreamSession, FormData
    has_curl_cffi = False
try:
    import webview
    has_webview = True
except ImportError:
    has_webview = False
try:
    import nodriver
    from nodriver.cdp.network import CookieParam
    from nodriver.core.config import find_chrome_executable
    from nodriver import Browser, Tab, util
    has_nodriver = True
except ImportError:
    from typing import Type as Browser
    from typing import Type as Tab
    has_nodriver = False
try:
    from platformdirs import user_config_dir
    has_platformdirs = True
except ImportError:
    has_platformdirs = False

from .. import debug
from .raise_for_status import raise_for_status
from ..errors import MissingRequirementsError
from ..typing import Cookies
from ..cookies import get_cookies_dir
from .defaults import DEFAULT_HEADERS, WEBVIEW_HAEDERS

if not has_curl_cffi:
    class Session:
        def __init__(self, **kwargs):
            raise MissingRequirementsError('Install "curl_cffi" package | pip install -U curl_cffi')

async def get_args_from_webview(url: str) -> dict:
    if not has_webview:
        raise MissingRequirementsError('Install "webview" package')
    window = webview.create_window("", url, hidden=True)
    await asyncio.sleep(2)
    body = None
    while body is None:
        try:
            await asyncio.sleep(1)
            body = window.dom.get_element("body:not(.no-js)")
        except:
            ...
    headers = {
        **WEBVIEW_HAEDERS,
        "User-Agent": window.evaluate_js("this.navigator.userAgent"),
        "Accept-Language": window.evaluate_js("this.navigator.language"),
        "Referer": window.real_url
    }
    cookies = [list(*cookie.items()) for cookie in window.get_cookies()]
    cookies = {name: cookie.value for name, cookie in cookies}
    window.destroy()
    return {"headers": headers, "cookies": cookies}

def get_cookie_params_from_dict(cookies: Cookies, url: str = None, domain: str = None) -> list[CookieParam]:
    [CookieParam.from_json({
        "name": key,
        "value": value,
        "url": url,
        "domain": domain
    }) for key, value in cookies.items()]

async def get_args_from_nodriver(
    url: str,
    proxy: str = None,
    timeout: int = 120,
    wait_for: str = None,
    callback: callable = None,
    cookies: Cookies = None,
    browser: Browser = None
) -> dict:
    if browser is None:
        browser, stop_browser = await get_nodriver(proxy=proxy, timeout=timeout)
    else:
        def stop_browser():
            ...
    try:
        if debug.logging:
            print(f"Open nodriver with url: {url}")
        domain = urlparse(url).netloc
        if cookies is None:
            cookies = {}
        else:
            await browser.cookies.set_all(get_cookie_params_from_dict(cookies, url=url, domain=domain))
        page = await browser.get(url)
        user_agent = await page.evaluate("window.navigator.userAgent")
        await page.wait_for("body:not(.no-js)", timeout=timeout)
        if wait_for is not None:
            await page.wait_for(wait_for, timeout=timeout)
        if callback is not None:
            await callback(page)
        for c in await page.send(nodriver.cdp.network.get_cookies([url])):
            cookies[c.name] = c.value
        await page.close()
        return {
            "impersonate": "chrome",
            "cookies": cookies,
            "headers": {
                **DEFAULT_HEADERS,
                "user-agent": user_agent,
                "referer": url,
            },
            "proxy": proxy,
        }
    finally:
        stop_browser()

def merge_cookies(cookies: Iterator[Morsel], response: Response) -> Cookies:
    if cookies is None:
        cookies = {}
    for cookie in response.cookies.jar:
        cookies[cookie.name] = cookie.value

async def get_nodriver(
    proxy: str = None,
    user_data_dir = "nodriver",
    timeout: int = 120,
    browser_executable_path=None,
    **kwargs
) -> tuple[Browser, callable]:
    if not has_nodriver:
        raise MissingRequirementsError('Install "nodriver" and "platformdirs" package | pip install -U nodriver platformdirs')
    user_data_dir = user_config_dir(f"g4f-{user_data_dir}") if has_platformdirs else None
    if browser_executable_path is None:
        try:
            browser_executable_path = find_chrome_executable()
        except FileNotFoundError:
            # Default to Edge if Chrome is not available.
            browser_executable_path = "C:\\Program Files (x86)\\Microsoft\\Edge\\Application\\msedge.exe"
            if not os.path.exists(browser_executable_path):
                browser_executable_path = None
    lock_file = Path(get_cookies_dir()) / ".nodriver_is_open"
    # Implement a short delay (milliseconds) to prevent race conditions.
    await asyncio.sleep(0.1 * random.randint(0, 50))
    if lock_file.exists():
        opend_at = float(lock_file.read_text())
        time_open = time.time() - opend_at
        if timeout * 2 > time_open:
            debug.log(f"Nodriver: Browser is already in use since {time_open} secs.")
            for _ in range(timeout):
                if lock_file.exists():
                    await asyncio.sleep(1)
                else:
                    break
    lock_file.write_text(str(time.time()))
    debug.log(f"Open nodriver with user_dir: {user_data_dir}")
    try:
        browser = await nodriver.start(
            user_data_dir=user_data_dir,
            browser_args=None if proxy is None else [f"--proxy-server={proxy}"],
            browser_executable_path=browser_executable_path,
            **kwargs
        )
    except:
        if util.get_registered_instances():
            browser = util.get_registered_instances().pop()
        else:
            raise
    def on_stop():
        try:
            if browser.connection:
                browser.stop()
        finally:
            lock_file.unlink(missing_ok=True)
    return browser, on_stop