# Twisted/Klein imports
from twisted.logger import Logger

# Other library imports
import requests
from json import dumps
from simplejson.errors import JSONDecodeError

# Project imports
from settings import settings


class Nordigen(object):
    """
    Class to manage calls to Open Banking APIs through Nordigen.
    """

    def __init__(self):
        self.log = Logger("nordigen")
        self.token = None
        self.get_access_token()

    def get_access_token(self):
        """
        Get an access token.
        :return: True or False
        :rtype: bool
        """
        headers = {"accept": "application/json", "Content-Type": "application/json"}
        data = {
            "secret_id": settings.Nordigen.ID,
            "secret_key": settings.Nordigen.Key,
        }
        path = f"{settings.Nordigen.Base}/token/new/"
        r = requests.post(path, headers=headers, data=dumps(data))
        try:
            parsed = r.json()
        except JSONDecodeError:
            self.log.error("Error parsing access token response: {content}", content=r.content)
            return False
        if "access" in parsed:
            self.token = parsed["access"]
            self.log.info("Refreshed access token - Nordigen")

    def get_institutions(self, country, filter_name=None):
        """
        Get a list of supported institutions.
        """
        if not len(country) == 2:
            return False
        headers = {"accept": "application/json", "Authorization": f"Bearer {self.token}"}
        path = f"{settings.Nordigen.Base}/institutions/?country={country}"
        r = requests.get(path, headers=headers)
        try:
            parsed = r.json()
        except JSONDecodeError:
            self.log.error("Error parsing institutions response: {content}", content=r.content)
            return False
        new_list = []
        if filter_name:
            for i in parsed:
                if filter_name in i["name"]:
                    new_list.append(i)
            return new_list
        return parsed