import requests
from urllib.parse import urljoin

class API_ERROR(Exception):
    pass

class Client:

    ITCH_API_BASE = 'https://itch.io/api/1/'
    
    def __init__(self, api_key):
        self.__api_key = api_key
        self.__session = requests.Session()

        self.__session.headers = {
            'Content-Type': 'application/json'
        }
    
    def find_game(self, query: str, page: int = 1):
        url = urljoin(self.ITCH_API_BASE, f'{self.__api_key}/search/games?query={query}&page={page}')
        response = self.__session.get(url)
        try:
            return response.json()['games']
        except requests.exceptions.JSONDecodeError as err:
            raise API_ERROR(str(err))
        except KeyError as err:
            raise API_ERROR(str(err))
    
    def game_uploads(self, game_id: int):
        url = urljoin(self.ITCH_API_BASE, f'{self.__api_key}/game/{game_id}/uploads')
        response = self.__session.get(url)
        try:
            return response.json()['uploads']
        except requests.exceptions.JSONDecodeError as err:
            raise API_ERROR(str(err))
        except KeyError as err:
            raise API_ERROR(str(err))
    
    def game_url(self, upload_id: int):
        url = urljoin(self.ITCH_API_BASE, f'{self.__api_key}/upload/{upload_id}/download')
        response = self.__session.get(url)
        try:
            return response.json()['url']
        except requests.exceptions.JSONDecodeError as err:
            raise API_ERROR(str(err))
        except KeyError as err:
            raise API_ERROR(str(err))
    
    def game_meta(self, game_id: int):
        url = urljoin(self.ITCH_API_BASE, f'{self.__api_key}/game/{game_id}')
        response = self.__session.get(url)
        try:
            return response.json()['game']
        except requests.exceptions.JSONDecodeError as err:
            raise API_ERROR(str(err))
        except KeyError as err:
            raise API_ERROR(str(err))