import sys
import json
import urllib
import requests

from settings.api import INPUT_HOSTNAME, INPUT_PORT, HEADERS


class BaseAPI(object):
    def __init__(self, api_url=None, verify_ssl=True):
        """Announces required parameters"""
        internal_api_url = f'http://{INPUT_HOSTNAME}:{INPUT_PORT}'
        self.API_URL = api_url if api_url else internal_api_url
        self.API_VERSION = 'v3'
        self.API_DEFINITION = 'api'
        self.HEADERS = HEADERS
        self.VERIFY_SSL = verify_ssl

    def _gen_request_url(self, url):
        return f'{self.API_URL}/{self.API_DEFINITION}/{self.API_VERSION}{url}'

    def call_api(self, url, method='GET', headers={}, data={}):
        # Open session
        with requests.Session() as session:
            try:
                url = self._gen_request_url(url)
                headers = self.HEADERS if not headers else headers
                params_str = urllib.parse.urlencode(data, safe="+'()")
                if method == 'POST':
                    api_request = session.post(
                        url=url,
                        json=data,
                        headers=headers,
                        verify=self.VERIFY_SSL
                    )
                if method == 'GET':
                    url = f'{url}?{params_str}' if params_str else url
                    api_request = session.get(
                        url=url,
                        headers=headers,
                        verify=self.VERIFY_SSL
                    )
            except Exception as error:
                api_request = {
                    'result': False,
                    'error': type(error).__name__
                }
                return api_request
            finally:
                session.close()

        # Get response
        try:
            response = json.loads(api_request.text)
            if 'error' in response and response['error']:
                print(response['error'])
                raise sys.exit()
            return response
        except json.decoder.JSONDecodeError:
            response = {'error': 'Can not parse response'}
            print(response)
            raise sys.exit()


class BaseAuthAPI(BaseAPI):
    def __init__(self, api_url=None, verify_ssl=True):
        """
        Init class for /auth/v4 requests

        Args:
            api_url (str, optional): url api host. Defaults to None.
            If None will use from settings.api.INPUT_HOSTNAME:INPUT_PORT

            verify_ssl (bool, optional): Isn't recommended. Defaults to True.
            Use only for testing if you don't have root sign SSL cert.
        """
        super().__init__(api_url, verify_ssl)
        self.API_VERSION = 'v4'
        self.API_DEFINITION = 'auth'

    def get_auth_token(self, email: str, password: str) -> dict:
        """
        Get auth token for authentication

        Arg:
            email (str): user email
            password (str): user password

        Returns:
            response (dict): {
                "confirmed": true,
                "expires_at": "date time",
                "id": "int",
                "token": "str"
            }
        """
        return self.call_api(
            url='/public/token',
            method='POST',
            data={'email': email, 'password': password}
        )

    def get_auth_key(self, token: str, user, auth_type='Internal') -> dict:
        """
        Key authentication

        Args:
            token (str): auth token
            user (str or int): user id or email
            auth_type (str, optional): May be Public for public auth.
            Defaults to 'Internal'.

        Returns:
            response (dict): {
                "id": "int",
                "key": "str"
            }
        """
        headers = {}
        if auth_type == 'Public':
            headers = self.make_auth_header(token)
        return self.call_api(
            url=f'/user/{user}/key',
            method='POST',
            headers=headers
        )

    def make_auth_header(self, token: str) -> dict:
        """
        Generate dict for auth header

        Args:
            token (str): auth token

        Returns:
            dict: {'x-xsrf-token': token} use it for request headers
        """
        return {'x-xsrf-token': token}

    def whoami(self, token: str) -> dict:
        return self.call_api(
            url='/whoami',
            method='GET',
            headers=self.make_auth_header(token)
        )


class BaseIpAPI(BaseAPI):
    def __init__(self, api_url=None, verify_ssl=True):
        super().__init__(api_url, verify_ssl)
        self.API_DEFINITION = 'ip'


class BaseDnsProxyAPI(BaseAPI):
    def __init__(self, api_url=None, verify_ssl=True):
        super().__init__(api_url, verify_ssl)
        self.API_DEFINITION = 'dnsproxy'