from typing import Any, Dict, List, Tuple

import logging
import os
import pickle
import sys
from importlib import reload
from pathlib import Path

import dotenv
import requests

HTTP_USERAGENT: dict[str, str] = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3"
}

logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)
logging.basicConfig(
    filename="internet.log",
    filemode="w",
    level=logging.INFO,
    format="%(name)s - %(levelname)s - %(message)s",
)

sys.path.append(str(Path(__file__).parent.parent.parent.parent) + "/utils/NLP")
sys.path.append(str(Path(__file__).parent.parent.parent.parent) + "/utils")
sys.path.append(str(Path(__file__).parent.parent))

import asyncio
import concurrent.futures
import itertools
import re

import aiohttp
import config
from bs4 import BeautifulSoup
from keywords import get_keywords
from normalize import normalizer
from relevancy import filter_relevant
from sentencize import sentencizer
from urlextract import URLExtract

dotenv.load_dotenv()


class Google:
    def __init__(
        self: "Google",
        query: str,
        GOOGLE_SEARCH_API_KEY: str,
        GOOGLE_SEARCH_ENGINE_ID: str,
    ) -> None:
        self.__GOOGLE_SEARCH_API_KEY: str = GOOGLE_SEARCH_API_KEY
        self.__GOOGLE_SEARCH_ENGINE_ID: str = GOOGLE_SEARCH_ENGINE_ID
        self.__num_res: int = (
            5
            if config.NLP_CONF_MODE == "speed"
            else (20 if config.NLP_CONF_MODE else 10)
        )
        self.__query = query
        self.__URL_EXTRACTOR: URLExtract = URLExtract()
        self.__urls: list[str] = self.__URL_EXTRACTOR.find_urls(query)
        self.__query = str(
            re.sub(
                r"\w+:\/{2}[\d\w-]+(\.[\d\w-]+)*(?:(?:\/[^\s/]*))*",
                "",
                str(self.__query),
            )
        )
        self.__cache_file: str = "google_internet_cache.pkl"
        self.__content: list[str] = []

    def __get_urls(self: "Google") -> None:
        # Send the request to the Google Search API
        if self.__GOOGLE_SEARCH_API_KEY == "":
            exit("ERROR: Google API Key not found")
        if self.__GOOGLE_SEARCH_ENGINE_ID == "":
            exit("ERROR: Google Search Engine Id not found")
        response = requests.get(
            "https://www.googleapis.com/customsearch/v1",
            params={
                "key": self.__GOOGLE_SEARCH_API_KEY,
                "q": self.__query,
                "cx": self.__GOOGLE_SEARCH_ENGINE_ID,
            },
        )
        results = response.json()["items"]
        for result in results:
            self.__urls.append(result["link"])
            if len(self.__urls) == self.__num_res:
                break
        if config.CONF_DEBUG:
            logging.info(f"Links: {self.__urls}")

    async def __fetch_url(self: "Google", session: Any, url: str) -> list[str]:
        try:
            async with session.get(url, headers=HTTP_USERAGENT) as response:
                html = await response.text()
                soup = BeautifulSoup(html, "html.parser")
                text = soup.get_text()
                normalized_text = normalizer(text)
                sentences: list[str] = sentencizer(normalized_text)
                if config.CONF_DEBUG:
                    logging.info(f"Sentences: {sentences}")
                return sentences
        except aiohttp.ClientConnectorError:
            if config.CONF_DEBUG:
                logging.info(
                    f"ClientConnector Error: Likely a connection issue with wifi"
                )
            return [""]
        except Exception:
            return [""]

    async def __fetch_urls(self: "Google", urls: list[str]) -> Any:
        async with aiohttp.ClientSession() as session:
            tasks = [
                asyncio.create_task(self.__fetch_url(session, url)) for url in urls
            ]
            results = await asyncio.gather(*tasks)
            return results

    def __flatten(self: Any, a: list[list[Any]]) -> list[Any]:
        return list(itertools.chain(*a))

    def __get_urls_contents(self: "Google") -> None:
        loop = asyncio.new_event_loop()
        asyncio.set_event_loop(loop)
        contents = loop.run_until_complete(self.__fetch_urls(self.__urls))
        loop.close()
        self.__content = self.__flatten(contents)

    def __filter_irrelevant_processing(self: "Google") -> None:
        # Create a ThreadPoolExecutor with 4 worker threads
        with concurrent.futures.ThreadPoolExecutor(max_workers=500) as executor:
            # Create a list of futures for the filtering tasks
            futures = [executor.submit(filter_relevant, self.__content, self.__query)]
            # Wait for the tasks to complete
            concurrent.futures.wait(futures)
            # Get the results of the tasks
            content: list[str] = []
            for future in futures:
                content.append(future.result())
            self.__content = content

    def google(
        self: "Google", filter_irrelevant: bool = True
    ) -> tuple[list[str], list[str]]:
        # Check the cache file first
        try:
            with open(self.__cache_file, "rb") as f:
                cache = pickle.load(f)
        except FileNotFoundError:
            cache = {}
        # Check if query are in the cache
        if self.__query in cache:
            results_cache: tuple[list[str], list[str]] = cache[self.__query]
            return results_cache
        # If none of the keywords are in the cache, get the results and update the cache
        self.__get_urls()
        self.__get_urls_contents()
        if filter_irrelevant:
            self.__filter_irrelevant_processing()
        results: tuple[list[str], list[str]] = (self.__content, self.__urls)
        cache[self.__query] = results
        with open(self.__cache_file, "wb") as f:
            pickle.dump(cache, f)
        return results


"""
Timing:
import time
start_time = time.time()
google("Who is Elon Musk")
print("--- %s seconds ---" % (time.time() - start_time))

# Results:

# --- 2.2230100631713867 seconds ---

# ________________________________________________________
# Executed in    4.73 secs    fish           external
#    usr time    3.35 secs   85.00 micros    3.35 secs
#    sys time    1.86 secs  956.00 micros    1.86 secs
"""