import json, requests
from flask import Flask, request, session, render_template, redirect, url_for, Response, send_file
from flask_session import Session

import pandas as pd
import numpy as np
from matplotlib.figure import Figure
import matplotlib.dates as mdates
import base64
from tqdm import tqdm

from io import BytesIO

import logging
logger = logging.getLogger()

#logger.setLevel('DEBUG')
logger.setLevel('INFO')
#logger.setLevel('WARN')
#logger.setLevel('ERROR')
#logger.setLevel('CRITICAL')

from EagleEyev3 import *
from settings import config

logging.info(f"Using EagleEyev3 version {EagleEyev3.__version__}")


app = Flask(__name__)

SESSION_TYPE = 'filesystem'
app.config.from_object(__name__)
Session(app)

@app.route('/')
def index():

    if 'een' in session:
        een = session['een']
    else:
        een = EagleEyev3(config)
        session['een'] = een

    # using current_user as a proxy for an established valid session
    if een.access_token == None:
        base_url            = "https://auth.eagleeyenetworks.com/oauth2/authorize"
        path_url            = f"?client_id={een.client_id}&response_type=code&scope=vms.all&redirect_uri={een.redirect_uri}"
        return redirect(f"{base_url}{path_url}")
    
    # call this to check if session is actually valid
    check = een.get_current_user()
    if 'success' not in check or check['success'] == False:
        base_url            = "https://auth.eagleeyenetworks.com/oauth2/authorize"
        path_url            = f"?client_id={een.client_id}&response_type=code&scope=vms.all&redirect_uri={een.redirect_uri}"
        return redirect(f"{base_url}{path_url}")
    else:
        logging.info(f"{check['success']} - check get_current_user {een.current_user['email']} {een.access_token}")


    #logging.info(een.cameras)


    # this call could get expensive
    een.get_list_of_cameras()

    #logging.info(een.cameras)

    values = {
        "current_user": een.current_user,
        "cameras":      een.cameras
    }

    return render_template('index.html', template_values=values)


@app.route('/login_callback')
def login_callback():
    # This is getting the ?code= querystring value from the HTTP request.
    code = request.args.get('code')

    if 'een' in session:
        een = session['een']
    else:
        een = EagleEyev3(config)


    if (code):
        # use the include code parameter to complete login process
        oauth_object = een.login_tokens(code)
    

    return redirect(url_for('index'))


@app.route('/logout')
def logout():
    if 'een' in session:
        een = session['een']
        een.logout()

    session.pop('een')    

    return redirect(url_for('index'))


@app.route('/cameras')
def cameras():
    if 'een' in session:
        een = session['een']
    else:
        een = EagleEyev3(config)    

    een.get_list_of_cameras()

    values = {
        "current_user": een.current_user,
        "cameras":      een.cameras
    }

    return render_template('cameras_partial.html', template_values=values)


@app.route('/camera/<esn>/live_preview')
def camera_live_preivew(esn=None):
    if 'een' in session:
        een = session['een']
    else:
        een = EagleEyev3(config)    

    camera = een.get_camera_by_id(esn)
    res = camera.get_live_preview()

    if res:
        return send_file(BytesIO(res.content), mimetype='image/jpeg')
    else:
        return send_file('static/placeholder.png')


@app.route('/camera/<esn>')
def camera_detail(esn=None):
    if 'een' in session:
        een = session['een']
    else:
        een = EagleEyev3(config)    

    camera = een.get_camera_by_id(esn)
    now = een.time_now()

    for i in tqdm(range(0,4)):
        camera.get_list_of_events(end_timestamp=een.time_before(ts=now, hours=6*i), \
                                start_timestamp=een.time_before(ts=now, hours=6*(i+1)))

    values = {
        "current_user": een.current_user,
        "camera":       camera,
        "events":       camera.events['status']
    }

    return render_template('camera_detail_partial.html', template_values=values)

@app.route('/camera/<esn>/status_plot')
def camera_status_plot(esn=None):
    if 'een' in session:
        een = session['een']
    else:
        een = EagleEyev3(config)    

    cam = een.get_camera_by_id(esn)

    atm_df = pd.DataFrame(cam.events['status'][::-1], columns=['id', 'startTimestamp', 'actorId', 'data'])
    atm_df['ts'] = pd.to_datetime(atm_df.startTimestamp)
    atm_df['status_desc'] = atm_df['data'].apply(lambda x:  x[0]['newStatus']['connectionStatus'])
    atm_df['status'] = atm_df['status_desc'].replace(to_replace=['online', 'offline', 'error', 'deviceOffline', 'deviceOnline', 'off', 'bridgeOffline'], value=[1,0,0,0,0,0,0])
    imp = atm_df.set_index(['ts'])

    imp['startTimestamp'] = pd.to_datetime(imp['startTimestamp'])
    imp = imp.drop(['id', 'actorId', 'data', 'status_desc'], axis=1)
    data = imp.resample('S').bfill()
    data['status'] = data['status'].astype('int64')

    data = data.drop(['startTimestamp'], axis=1)

    # Generate the figure **without using pyplot**.
    fig = Figure(figsize=(6, 5), dpi=160)
    ax = fig.subplots()

    ax.step(data.index, data['status'], lw=2, color='blue')
    ax.set_title(cam.name)
    # ax.fill_between(data['startTimestamp'], data['status'])
    ax.axhline(1, color='green', lw=2, alpha=0.3)
    ax.axhline(0, color='red', lw=2, alpha=0.3)

    for label in ax.get_xticklabels(which='major'):
        label.set(rotation=30, horizontalalignment='right')


    # Save it to a temporary buffer.
    buf = BytesIO()
    fig.savefig(buf, format="png")
    # Embed the result in the html output.
    data = base64.b64encode(buf.getbuffer()).decode("ascii")
    return f"<div class='col-md-12'><img src='data:image/png;base64,{data}' width=70%/></div>"





if __name__ == '__main__':
    app.run(host=een.server_host, port=een.server_port)