import json
import base64
import requests
import googlesearch
import google_images_search

from .validator import barcode_validator
from .exception import bad_request_exception
from .exception import autoadder_exception

class autoadder:
    def __init__(self, apikey: str, engine: str) -> None:
        self.__apikey = apikey
        self.__engine = engine

    def __images(self) -> object:
        return google_images_search.GoogleImagesSearch(
            self.__apikey,
            self.__engine
        )

    def __search(self, phrase: str) -> object:
        for count in googlesearch.search(phrase, advanced= True):
            return count
        
        return phrase

    def __check_barcode(self, barcode: str) -> None:
        if barcode_validator(barcode).invalid:
            raise bad_request_exception("Invalid barcode")

    def __image_request(self, source: str) -> str:
        request = requests.get(source)

        if not request.ok or not "Content-Type" in request.headers:
            raise bad_request_exception("Can nor fetch image")

        image = request.content
        encoded = base64.b64encode(image)
        extension = request.headers["Content-Type"]

        return encoded, extension

    def find(self, barcode: str) -> dict:
        self.__check_barcode(barcode)

        title = self.__search(barcode).title
        description = title
        author = "Somebody"
        image = ""
        image_type = ""

        try:
            image_search = self.__images()
            image_search.search(search_params = {
                "q": barcode,
                "num": 1,
                "filetype": "jpg"
            })

            images = image_search.results()
        except Exception as error:
            raise autoadder_exception("Google API not work. Check API key.")

        if len(images) > 0:
            image, image_type = self.__image_request(images[0].url)

        splited = title.split(" ")

        if len(splited) > 3:
            title = " ".join(splited[0:3])

        return {
            "title": title,
            "description": description,
            "author": author,
            "barcode": barcode,
            "image": image,
            "image_type": image_type
        }