import json

import requests

OAUTH_CLIENT_ID = '5yjU0g18LOIl1fzNgRQ9xGU0Ou4UTsimoMvvRZsG'
OAUTH_CLIENT_SECRET = 'vyNixGW5OhOnvn9s1Z21RWdsEtsau1a45e15FAhFV3WfWy4lPdcTu6dmhR5MRKqpcKeScN7WvMGomZhzh7vJgcGWEbs7hptYriHI5ZIw3672hm4D3zUfcWYMjMUMuUOO'
API_URI = 'http://127.0.0.1:8000'


class ApiClient():
    def __init__(self, phone_number, auth_data=None):
        self.auth_data = {}
        if auth_data:
            self.auth_data = auth_data

        self.phone_number = phone_number

    def login(self, password):
        phone_number = self.phone_number

        data = {
            "grant_type": "password",
            "username": phone_number,
            "password": password,
            "scope": 'read write groups introspection',
            "auth_gateway": 'phone_number:otp'
        }
        auth = (OAUTH_CLIENT_ID, OAUTH_CLIENT_SECRET)

        response = requests.post(f'{API_URI}/oauth2/token/',
                                 data=data,
                                 auth=auth)

        auth_data = response.json()
        if 'access_token' in auth_data:
            self.auth_data = auth_data

        return auth_data

    def _request(self, path, data=None, files=None, method='get', with_auth=True, encode=True):
        if files:
            header = {}
        else:
            header = {
                "Content-Type": "application/json",
                "charset": "utf-8"
            }
        if with_auth:
            access_token = self.auth_data.get('access_token', '')
            header.setdefault("Authorization", f"Bearer {access_token}", )

        if data and encode:
            data = json.dumps(data)

        response = requests.request(method, f'{API_URI}/{path}', headers=header, data=data, files=files)
        try:
            return response.json()
        except:
            return response.content.decode()

    def request_otp(self):
        phone_number = self.phone_number

        path = 'request_otp/'
        method = 'post'
        data = {
            'phone_number': phone_number
        }
        result = self._request(path=path, data=data, method=method, with_auth=False)
        return result

    def get_account(self):
        path = 'account'
        result = self._request(path=path)
        return result

    def update_account(self, **kwargs):
        path = 'account/'
        data = {}
        fields = (
            'username',
            "first_name",
            "last_name",
            'name',
            'iban',
            'iban_card_number',
            'iban_account_number',
        )
        for key, value in kwargs.items():
            if key in fields:
                data.setdefault(key, value)

        avatar = kwargs.get('avatar')
        if avatar:
            files = {'avatar': avatar}
            encode = False
        else:
            files = None
            encode = True

        result = self._request(path=path, data=data, method='put', files=files, encode=encode)
        return result

    def change_password(self, old_password, new_password, old_password_gateway='otp'):
        path = 'change_password/'
        data = {'old_password': old_password,
                'new_password': new_password,
                'old_password_gateway': old_password_gateway
                }

        result = self._request(path=path, data=data, method='put')
        return result

    def get_user_profile(self, code):
        path = f'users/{code}/'
        result = self._request(path=path)
        return result

    def get_transactions(self, page=None):
        path = 'transactions/'
        if page:
            page = int(page)
            path = f'{path}?page={page}'

        return self._request(path=path)

    def get_transaction(self, code):
        path = f'transactions/{code}'
        return self._request(path=path)

    def create_transaction(self, amount, delay, payer=None):
        data = {
            'delay': delay,
            'amount': amount
        }
        if payer:
            data.setdefault('payer', {'code': payer})
        response =  self._request('transactions/', method='post', data=data)
        return response and 'code' in response, response

    def pay_transaction(self, code):
        path = f'transactions/{code}/pay'
        return self._request(path=path)

    def receipt_transaction(self, code):
        path = f'transactions/{code}/receipt'
        return self._request(path=path)

    def get_introspection(self):
        path = 'oauth2/introspect/'
        access_token = self.auth_data.get('access_token', '')
        data = {
            'token': access_token,
        }
        return self._request(path=path, data=data)