from flask import render_template, abort, redirect, url_for, abort, flash, request, current_app, make_response, g
from flask_login import login_required, login_user, logout_user, current_user
from flask_sqlalchemy import get_debug_queries

from . import livesupport 
from .forms import MessageForm
from .. import db
from ..email import send_email
from ..models import User, Permission, SupportTopic, SupportLine, contact_proxmaster

import base64
from datetime import date, time, datetime
from dateutil.relativedelta import relativedelta

@livesupport.after_app_request
def after_request(response):
    for query in get_debug_queries():
        if query.duration >= current_app.config['SLOW_DB_QUERY_TIME']:
            current_app.logger.warning('Slow query: %s\nParameters: %s\nDuration: %fs\nContext: %s\n' % (query.statement, query.parameters, query.duration, query.context))
    return response

#SUPPORT
@livesupport.route("/support", methods=['GET'])
@login_required
def support_list():
    """ general enquiry and list all open support tasks """
    cuser = current_user
    form = MessageForm()

    alltopics = cuser.inv_topics.all()
    return render_template('livesupport/support_list.html', form=form, inv_topics=alltopics)

@livesupport.route("/support/<string:topic>/", methods=['GET', 'POST'])
@login_required
def support(topic):
    """ block item for support chatbox. invoked from vdc_pool or supportlist """
    cuser = current_user
    form = MessageForm()

    if request.method == "GET":
        support_topic = SupportTopic.query.filter_by(hashtag=str(topic)).first()
        if support_topic == None:
            class EmptySupport():
                hashtag=str(topic)
                timestamp=datetime.utcnow()
            support_topic = EmptySupport()
            return render_template('livesupport/support_item.html', form=form, support=support_topic)
        else:
            if support_topic.user_id != cuser.pid:
                abort(403) #TODO: hidden 403. there is a topic like that but its not yours!
            else:
                #topic is yours. show it.
                return render_template('livesupport/support_item.html', form=form, support=support_topic)

    if request.method == "POST" and form.validate_on_submit():
        support_topic = SupportTopic.query.filter_by(hashtag=str(topic)).first()
        if support_topic == None:
            #no topic. create one?
            if cuser.inv_topics.all() != []:
                #check if other topics exist, and ratelimit
                last_topic = cuser.inv_topics.order_by(SupportTopic.timestamp.desc()).first()
                now = datetime.utcnow()
                time_last_topic = last_topic.timestamp
                expiry = time_last_topic + relativedelta(time_last_topic, minutes=+5)
                if now < expiry:
                    flash('ratelimit. try again later')
                    return redirect(url_for('livesupport.support_list'))
            #create new topic
            new_topic = SupportTopic(user_id=cuser.pid, hashtag=str(topic))
            db.session.add(new_topic)
            new_line = SupportLine(topic_id=new_topic.pid, line=str(form.line.data))
            db.session.add(new_line)

        else:
            if support_topic.user_id == cuser.pid:
                new_line = SupportLine(topic_id=support_topic.pid, line=form.line.data)
                db.session.add(new_line)
            else:
                abort(403) #TODO: hidden 404

        db.session.commit()
        return redirect(url_for('livesupport.support_list'))