# 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 TrueLayer(object):
    """
    Class to manage calls to Open Banking APIs through TrueLayer.
    """

    def __init__(self):
        self.log = Logger("truelayer")
        self.token = None
        # self.auth = HTTPBasicAuth(settings.Yapily.ID, settings.Yapily.Key)
        # print(self.get_institutions())
        # authorisation = self.get_authorisation("monzo_ob", settings.Yapily.CallbackURL)
        # print("authirisation", authorisation)

    def setup_auth(self):
        """
        Exchange an authentication code for an access and refresh token.
        """
        headers = {"Content-Type": "application/x-www-form-urlencoded"}
        data = {
            "grant_type": "authorization_code",
            "code": settings.TrueLayer.Monzo_AuthCode,
            "client_id": settings.TrueLayer.ID,
            "client_secret": settings.TrueLayer.Key,
            "redirect_uri": "https://console.truelayer.com/redirect-page",
        }
        r = requests.post(f"{settings.TrueLayer.Base}/connect/token", data=data, headers=headers)
        try:
            parsed = r.json()
        except JSONDecodeError:
            self.log.error("Error parsing access token response: {content}", content=r.content)
            return False
        print("PARSED", parsed)
        if r.status_code == 200:
            try:
                settings.TrueLayer.Monzo_RefreshToken = parsed["refresh_token"]
                settings.TrueLayer.Monzo_SetupToken = "0"
                settings.write()
                self.log.info("Refreshed refresh token - TrueLayer")
                self.token = parsed["access_token"]
                self.log.info("Refreshed access token - TrueLayer")
            except KeyError:
                self.log.error(f"Token authorization didn't contain refresh or access token: {parsed}", parsed=parsed)
                return False
        else:
            self.log.error(f"Cannot refresh token: {parsed}", parsed=parsed)
            return False

    def get_new_token(self, fail=False):
        """
        Exchange our refresh token for an access token.
        """
        headers = {"Content-Type": "application/x-www-form-urlencoded"}
        data = {
            "grant_type": "refresh_token",
            "refresh_token": settings.TrueLayer.Monzo_RefreshToken,
            "client_id": settings.TrueLayer.ID,
            "client_secret": settings.TrueLayer.Key,
        }
        r = requests.post(f"{settings.TrueLayer.Base}/connect/token", data=data, headers=headers)
        try:
            parsed = r.json()
        except JSONDecodeError:
            if fail:
                exit()
            return False
        if r.status_code == 200:
            if "access_token" in parsed.keys():
                self.token = parsed["access_token"]
                self.log.info("Refreshed access token - TrueLayer")
                return True
            else:
                self.log.error(f"Token refresh didn't contain access token: {parsed}", parsed=parsed)
                if fail:
                    exit()
                return False
        else:
            self.log.error(f"Cannot refresh token: {parsed}", parsed=parsed)
            if fail:
                exit()
            return False

    def get_institutions(self, filter_name=None):
        """
        Get a list of supported institutions.
        """

        path = f"{settings.Yapily.Base}/institutions"
        r = requests.get(path, auth=self.auth)
        try:
            parsed = r.json()
        except JSONDecodeError:
            self.log.error("Error parsing institutions response: {content}", content=r.content)
            return False
        return parsed

    def get_authorisation(self, institution_id, callback_url):
        """
        Get an authorisation URL for linking a bank account of an institution.
        """
        headers = {"Content-Type": "application/json"}
        data = {"applicationUserId": "account-data-and-transactions-tutorial", "institutionId": institution_id, "callback": callback_url}
        path = f"{settings.Yapily.Base}/account-auth-requests"
        r = requests.post(path, headers=headers, data=dumps(data), auth=self.auth)
        try:
            parsed = r.json()
        except JSONDecodeError:
            self.log.error("Error parsing institutions response: {content}", content=r.content)
            return False
        return parsed