from flask import render_template, abort, redirect, url_for, abort, flash, request, current_app, make_response, g
from . import news

from functools import lru_cache
import requests
import json
from dateutil.parser import parse
from dateutil.tz import tzutc
from facepy import GraphAPI

@lru_cache(maxsize=32)
def get_fb_token():
    payload = {'grant_type': 'client_credentials', 'client_id': current_app.config['FB_APP_ID'], 'client_secret': current_app.config['FB_APP_SECRET']}
    response = requests.post('https://graph.facebook.com/oauth/access_token?', params = payload)
    fbjson = json.loads(response.text)
    fbtoken = fbjson['access_token']
    #current_app.logger.info("FB Token: {}".format(fbtoken))
    return fbtoken

@news.app_template_filter('fbtime')
def fbtime(event_date):
    UTC = tzutc()
    dt = parse(event_date)
    dt_utc = dt.astimezone(UTC)  # Convert to UTC
    return dt.strftime('%d %b %Y')

@news.route("/all", methods=['GET'])
def all():
    graph = GraphAPI(get_fb_token())
    #current_app.logger.info(get_fb_token.cache_info())
    page_id = current_app.config['FB_PAGE_ID']
    datas = graph.get(page_id+'/posts?fields=id,message,created_time,link,icon', page=True, retry=3)
    posts = []
    for data in datas:
        posts.append(data)
    content=posts[0]['data']
    return render_template('news/facebook.html', result=content)

@news.route('/latest')
def latest():
    graph = GraphAPI(get_fb_token())
    page_id = current_app.config['FB_PAGE_ID']
    latest = graph.get(page_id+'/posts?limit=2&fields=id,message,created_time,link', page=True, retry=3)
    posts = []
    for data in latest:
        posts.append(data)
    content=posts[0]['data']
    return render_template('news/latest.html', result=content)