# Python standard libraries
import json
import os
import sqlite3

# Third-party libraries
import flask
from flask import render_template, flash
from flask import Flask, redirect, request, url_for, jsonify
from flask_login import (
    LoginManager,
    current_user,
    login_required,
    login_user,
    logout_user,
)
import requests

import server.googleHandler as google

from backend.Routine import Routine
from server import login_manager, app, db
from server.forms import LoginForm, RegistrationForm, DeviceForm
from server.models import User, Calendar, Device

os.environ['OAUTHLIB_INSECURE_TRANSPORT'] = '1'

@app.route("/")
def account():
    return flask.redirect('account')

@app.route("/account")
def index():
    if current_user.is_authenticated:
        google.updateCalendars()
        return (flask.render_template('account.html',
            username = current_user.username, email = current_user.email, profile_img=current_user.profile_pic
            )
        )
    else:
        return flask.render_template('login.html')

@app.route("/view")
def view():
    if not current_user.is_authenticated:
        return flask.render_template('login.html')
    else:
        return (flask.render_template('view.html'))

@app.route("/devices", methods=['GET', 'POST'])
def devices():
    if not current_user.is_authenticated:
        return flask.render_template('login.html')
    
    device = Device()
    device.deviceId="Anthon-Mouse-Car"
    devices = [device]
    form = DeviceForm()
    if form.validate_on_submit():
        print(form.deviceId.data, flush=True)
        # TODO add device to database here
        
    return flask.render_template('devices.html', devices=devices, form=form)


@app.route("/calendar")
@login_required
def calendar():
    calendars = google.calendarsFromDb()
    return flask.render_template('calendar.html', calendars=calendars)

@app.route('/login/email', methods=['GET', 'POST'])
def emaillogin():
    if current_user.is_authenticated:
        return redirect(url_for('account')      )
    form = LoginForm()

    if form.validate_on_submit():
        user = User.query.filter_by(username=form.username.data).first()
        if user is None or not user.checkPassword(form.password.data):
            flash('invalid username or password')
            return redirect(url_for('emaillogin'))
        login_user(user, remember=form.remember_me.data)
        return redirect(url_for('account'))
    return render_template('emaillogin.html', title='Sign In', form=form)


@app.route('/register', methods=['GET', 'POST'])
def register():
    if current_user.is_authenticated:
        return redirect(url_for('account'))
    form = RegistrationForm()
    if form.validate_on_submit():
        user = User(id=form.username.data,
                    username=form.username.data, 
                    email=form.email.data)
        user.setPassword(form.password.data)
        db.session.add(user)
        db.session.commit()
        flash('Congratulations, you are now a registered user!')
        return redirect(url_for('emaillogin'))
    return flask.render_template('register.html', title='Register', form=form)

@app.route("/delete_account")
def deleteAccount():
    if not current_user.is_authenticated:
        return redirect(url_for('account'))
    print(current_user.getGoogleCredentials(), flush=True)
    google.deleteAccount(current_user.getGoogleCredentials())
    
    user = db.session.query(User).filter(User.id==current_user.id).first()
    logout_user()
    db.session.delete(user)
    db.session.commit()

    return redirect(url_for('account'))

@app.route("/login/google")
def googlelogin():
    if current_user.is_authenticated and current_user.getGoogleCredentials() != None:
        return redirect(url_for('account'))

    authorization_url = google.login()

    return flask.redirect(authorization_url)

@app.route("/login/google/callback")
def callback():
    session, credentials = google.verifyResponse()
    
    if current_user.is_authenticated and current_user.getGoogleCredentials == None:
        current_user.setGoogleCredentials(credentials)
    userinfo = session.get('https://www.googleapis.com/userinfo/v2/me').json()
    
    # Create a user in your db with the information provided
    # by Google

    # Doesn't exist? Add it to the database.
    if not User.query.get(userinfo['id']):
        newser = User(
            id=userinfo['id'], 
            username=userinfo['name'], 
            email=userinfo['email'], 
            profile_pic=userinfo['picture'],
            password_hash=""
        )   
        db.session.add(newser)
        db.session.commit()

    user = User.query.get(userinfo['id'])

    # Begin user session by logging the user in
    print("login:" + user.id)

    login_user(user)
    # TODO currently not using the credentials anymore
    if user.getGoogleCredentials() is None:
        user.setGoogleCredentials(credentials)
    return flask.redirect(flask.url_for('index'))

@app.route("/logout")
@login_required
def logout():
    logout_user()
    return redirect(url_for("index"))

def credentials_to_dict(credentials):
  return {'token': credentials.token,
          'refresh_token': credentials.refresh_token,
          'token_uri': credentials.token_uri,
          'client_id': credentials.client_id,
          'client_secret': credentials.client_secret,
          'scopes': credentials.scopes}


@app.route("/userinfo/<path:device>/calendarevents.json")
def downloader(device):
    path = "/home/calendarwatch/userinfo/" + device + "/"
    # return flask.send_from_directory(path, "calendarevents.json")
    request_user = db.session.query(User).filter(User.id==device).first()
    if request_user == None: 
        return jsonify(kind="unregistered")

    routine = Routine()
    routine.updateCalendar(request_user) 
    return jsonify(request_user.getJson())

@app.route("/devicefingerprint.json")
def generateDeviceFingerprint():
    # Create Three Random Words
    # check not in Device Database
    # Save as new Device
    # Send to User
    return jsonify(deviceId="Carrot-Enamel-Storm")

# POST

@app.route('/calendar', methods = ['POST', 'DELETE'])
@login_required
def user():
    if request.method == 'POST':
        calId = request.json.get('calendar_id')
        color = request.json.get('color', None)
        toggle = request.json.get('toggle', None)
        
        print(request.json, flush=True)
        if color != None:
            Calendar.updateCalendar(current_user.id, calId, color=color)
        if toggle != None:
            Calendar.updateCalendar(current_user.id, calId, toggle=toggle)
        # toggle specific calendar of user
        
    elif request.method == 'DELETE':
        # do nothing
        return 'NONE'
    else:
        # POST Error 405
        print("405")

    return 'OK'