import requests
import json
from requests_oauthlib import OAuth1Session
from flask import Blueprint, current_app, request, jsonify
from rsa import verify
from ayct_backend.twitter.models import *
from ayct_backend.campaign.models import *
from ayct_backend.firebase import verify_token

campaign = Blueprint('campaign', __name__)

@campaign.route('/campaign', methods=['GET'])
def get_twitter_campaigns():
    decoded_token = verify_token(request.headers)
    if not decoded_token:
        return "Not authorised!", 401

    user_id = decoded_token['sub']

    twitter_campaigns = TwitterCampaign.query.filter_by(user_id=user_id)

    campaigns = []

    for campaign in twitter_campaigns:
        campaign_data = {}
        campaign_data['campaign_name'] = campaign.campaign_name
        campaign_data['twitter_account_id'] = campaign.twitter_account_id
        campaign_data['user_input'] = campaign.user_input
        campaign_data['generated_content'] = campaign.generated_content
        campaign_data['twitter_post_id'] = campaign.twitter_post_id
        campaigns.append(campaign_data)

    return jsonify({
        "twitter_campaigns": campaigns
    }), 200

@campaign.route('/campaign', methods=['POST'])
def add_twitter_account():
    decoded_token = verify_token(request.headers)
    if not decoded_token:
        return "Not authorised!", 401

    user_id = decoded_token['sub']

    content_type = request.headers.get('Content-Type')
    if (content_type == 'application/json'):
        request_json = request.json
        if not request_json['campaign_name'] or not request_json['user_input'] or not request_json['twitter_account_id']:
            return "Invalid request!", 400
        else:
            consumer_key = current_app.config["TWITTER_CONSUMER_KEY"]
            consumer_secret = current_app.config["TWITTER_CONSUMER_SECERT"]

            twitter_account = TwitterAccount.query.filter_by(twitter_account_id=request_json['twitter_account_id']).first()

            # generate campaign content
            core_url = 'http://65.108.80.28:4999/generate'
            payload = {
                "data": request_json['user_input'], 
                "length": 420
            }

            response = requests.post(core_url, headers={"Content-Type":"application/json"}, data=json.dumps(payload))

            generated_content = response.content.decode("utf-8").replace('<|endoftext|>', '').replace('  ', ' ')

            trimmed_text = generated_content[:270]
            dot_index = trimmed_text.rfind(".")
            space_index = trimmed_text.rfind(" ")
            if dot_index > 0:
                tweet_text = trimmed_text[:dot_index].capitalize()
            else:
                tweet_text = trimmed_text[:space_index].capitalize()

            # create post on twitter
            oauth = OAuth1Session(
                consumer_key,
                client_secret=consumer_secret,
                resource_owner_key=twitter_account.access_token,
                resource_owner_secret=twitter_account.access_token_secret,
            )

            response = oauth.post(
                "https://api.twitter.com/2/tweets",
                json={"text": tweet_text + str(dot_index) + str(space_index)},
            ).json()['data']

            # save campaign to database
            new_twitter_campaign = TwitterCampaign(
                campaign_name = request_json['campaign_name'],
                user_id = user_id,
                twitter_account_id = request_json['twitter_account_id'],
                user_input = request_json['user_input'],
                generated_content = tweet_text,
                twitter_post_id = response['id']
            )

            campaign_db.session.add(new_twitter_campaign)
            campaign_db.session.commit()
            
            return "Campaign succesfully created.", 201
    else:
        return "Content-type not supported!", 400