import os
import logging
import json

from flask import Flask, render_template, g, url_for, redirect
from werkzeug.exceptions import abort

import calendar_interface
import db
import auth

logging.basicConfig(format='%(asctime)s,%(msecs)d %(levelname)-4s [%(filename)s:%(lineno)d] %(message)s',
    datefmt='%Y-%m-%d:%H:%M:%S',
    level=logging.INFO
    )

app = Flask(__name__)
app.config.from_object(os.environ["CONFIG"])# load config, pointed to by env var 

app.teardown_appcontext(db.close_db)
app.cli.add_command(db.init_db_command)
app.register_blueprint(auth.bp)


@app.route('/')
@auth.login_required
def index():
    events = calendar_interface.get_future_calendar_events().get("value")
    calendar_interface.convert_datetimes(events)
    # Check current users attendance in event
    for event in events:
        ret = calendar_interface.check_attendee_presence(event, g.user["email"])
        event["user_attends"] = ret
    if events is None:
        abort(404)
    else:
        return render_template('index.html', events=events, user=g.user)


@app.route('/<id>')
@auth.login_required
def show_event(id):
    event = calendar_interface.get_calendar_event(id)

    if "error" in event:
        print("id:", id)
        logging.error("Found error in event query with id\n%s", event)
        logging.error(json.dumps(event, indent=2))
        abort(404)

    calendar_interface.convert_datetime(event)

    attendees= ", ".join(
        [a["emailAddress"]["name"] + " (" + a["emailAddress"]["name"] + ")" for a in event["attendees"]]
        )
    location= "<br/>" + event["location"].get("displayName", "")

    if "address" in event["location"].keys():
        location+= "<br/>".join(event["location"]["address"].values())

    return render_template(
        'show_event.html', 
        subject=event["subject"], 
        attendees=attendees, 
        content=event["body"]["content"], 
        location=location, 
        start=event["start"]["date"] + " - " + event["start"]["time"], 
        end=event["end"]["date"] + " - " + event["end"]["time"]
        )

@app.route('/<id>/attend')
@auth.login_required
def attend(id):
    event = calendar_interface.get_calendar_event(id)

    user = g.user["username"]
    email = g.user["email"]

    # only update attendees, now the whole event
    data = {}
    data["attendees"] = event["attendees"]

    logging.info("attempting to attend event with user: %s %s", email, user)
    calendar_interface.add_attendee(data, user, email)

    logging.info("Sending data for attendee update:\n%s", json.dumps(data, indent=2))
    calendar_interface.update_calendar_event(id, data)    

    return redirect(url_for('index'))

@app.route('/<id>/unattend')
@auth.login_required
def unattend(id):
    event = calendar_interface.get_calendar_event(id)

    user = g.user["username"]
    email = g.user["email"]

    # only update attendees, now the whole event
    data = {}
    data["attendees"] = event["attendees"]

    logging.info("attempting to unattend event with user: %s %s", email, user)
    calendar_interface.delte_attendee(data, email)

    logging.info("Sending data for attendee update:\n%s", json.dumps(data, indent=2))
    calendar_interface.update_calendar_event(id, data)    

    return redirect(url_for('index'))