# service_fb_external.py
from facebook_business.api import FacebookAdsApi

from .service_fb import FbServiceCore
from .service_fb_db_handler import DbFbServiceHandler


class FbServiceHandlerExternal(FbServiceCore):
    """Main class to work with client's own business accounts
    Inherits methods from FbSErviceHanlde -
    note that majority of methods of parent class will throw Runtime Error as those are not suppose to work"""

    business_id = ""

    def __init__(self, schema):
        super().__init__()
        self.schema = schema
        self.fb_credentials = self.get_credentials_from_db()
        self.fb_user_id = self.fb_credentials["user_id"]
        try:
            FacebookAdsApi.init(access_token=self.fb_credentials["access_token"])
        except Exception as e:
            raise RuntimeError(f"Could not initiate FacebookAdsApi - {e}")

    def get_credentials_from_db(self):
        """Getting FB credentials from db
        Triggers RuntimeError if no fb user connected through SDK
        """
        try:
            db_io = DbFbServiceHandler()
            df = db_io.get_fb_user(schema=self.schema)
            df = df.iloc[0]
            data = df.to_dict()
        except IndexError as e:
            raise RuntimeError(f"No facebook user connected - {e}")
        return data

    def list_connected_businesses(self):
        """Using provided user_id to list connected businesses"""
        fields = ["permitted_roles", "name"]
        params = {"fields": fields}
        method = "GET"
        endpoint = f"{self.fb_user_id}/businesses"
        response = self.make_request(method=method, endpoint=endpoint, params=params)
        return response

    def list_business_owned_adaccounts(self):
        """Using provided business_id getting the list of owned adaccounts"""
        # fields = ['description', 'name']
        # params = {'fields': fields}
        method = "GET"
        endpoint = f"{self.business_id}/owned_ad_accounts"
        response = self.make_request(method=method, endpoint=endpoint)
        return response

    def list_user_owned_adaccounts(self):
        """Using provided user_id getting the lsit of owned adaccounts"""

        fields = ["name", "account_status", "age"]
        params = {"fields": fields}
        method = "GET"
        endpoint = f"{self.fb_user_id}/adaccounts"
        response = self.make_request(method=method, endpoint=endpoint, params=params)
        return response

    def revoke_all_user_access(self):
        """Completely removing fb user from the app
        (user will need to re-authenticate)"""
        method = "DELETE"
        endpoint = f"{self.fb_user_id}/permissions"
        response = self.make_request(method=method, endpoint=endpoint)
        return response

    def revoke_specific_user_access(self, scopes):
        """Removing specific scopes granted to the app by user"""
        response_list = []
        for scope in scopes:
            method = "DELETE"
            endpoint = f"{self.fb_user_id}/permissions/{scope}"
            response = self.make_request(method=method, endpoint=endpoint)
            response_list.append({"scope": scope, "response": response})
        return response_list

    def get_granted_permissions(self):
        """Check with permissions are granted to Fansifter by user_id"""
        method = "GET"
        endpoint = f"{self.fb_user_id}/permissions"
        response = self.make_request(method=method, endpoint=endpoint)
        return response