from time import sleep
from flask import Flask, render_template, request
from blinker import Namespace
import threading
import RPi.GPIO as GPIO
import copy
import os
from pprint import pprint
from datetime import datetime
from tinydb import TinyDB, Query

#RPI_LGPIO_REVISION="800032" entr python app.p
#ledpin = 4 # set output LED pin
#pushpin = 17 # set input push button pin
pushpins = [17, 27, 22, 10, 9, 11, 0, 5]

app = Flask(__name__)
app.jinja_options['variable_start_string'] = '[['
app.jinja_options['variable_end_string'] = ']]'

my_signals = Namespace()
value_toggled = my_signals.signal('value-toggled')


db = TinyDB(os.path.dirname(__file__) + '/db.json')
DbState = Query()

class DoorState:
    door1 = True
    states = {}
    heartbeat = 0

    def __init__(self):
        for i in range(0, 8):
            self.states[i] = {
                'closed': False,
                'date':   False,
                'index':  i,
                }
            db_item = db.get(DbState.index == i)
            if db_item:
                self.states[i] = db_item
            else:
                db.insert(self.states[i])

door_state = DoorState()


@value_toggled.connect
def on_value_toggled(sender, pin_states):
    #door_state.door1 = not door_state.door1
    #door_state.door1 = pin_state
    #pprint(pin_states)
    for i in pin_states:
        #print(i)
        #print(pin_states[i])
        if door_state.states[i]['closed'] == pin_states[i]:
            door_state.states[i]['closed'] = not pin_states[i]
            door_state.states[i]['date'] = datetime.now().isoformat()
            db.update(door_state.states[i], DbState.index == i)

    #pprint(door_state.states)
    
thread_event = threading.Event()

def backgroundTask(signal):
    while thread_event.is_set():
        #pin_state = GPIO.input(pushpin)
        pin_states = {}
        for i, val in enumerate(pushpins):
            pin_states[i] = GPIO.input(val)
        signal.send(app, pin_states=pin_states)
        sleep(1)

@app.route('/')
def index():
    return render_template('index.html')

@app.route('/details')
def details():
    return render_template('details.html')

@app.route('/status', methods=['GET', 'POST'])
def status():
    data = request.get_json()
    heartbeat = not data['heartbeat']
    states = copy.deepcopy(door_state.states)
    for i in states:
        if not states[i]['date']:
            continue
        date = datetime.fromisoformat(
            states[i]['date']
            )
        date = date.strftime('%d.%m.%Y %H:%M:%S')
        states[i]['date'] = date
    return {
        'states':    states,
        'heartbeat': heartbeat,
        }

@app.route('/toggle')
def toggle():
    value_toggled.send(app)
    return 'OK'
        
if __name__ == '__main__':
    GPIO.setmode(GPIO.BCM)
    #GPIO.setup(ledpin, GPIO.OUT) # set ledpin as an output
    #GPIO.setup(pushpin, GPIO.IN, pull_up_down=GPIO.PUD_UP) # with pull up resistor
    #GPIO.setup(pushpin, GPIO.IN) # with pull up resistor
    for i, val in enumerate(pushpins):
        GPIO.setup(val, GPIO.IN, pull_up_down=GPIO.PUD_UP)
    thread_event.set()
    thread = threading.Thread(target=backgroundTask, args =(value_toggled, ))
    thread.daemon = True
    thread.start()
    app.run(use_reloader=False, debug=True, host='0.0.0.0')
    thread_event.clear()

#while True:
#    #GPIO.output(ledpin, GPIO.input(pushpin))
#    print(GPIO.input(pushpin))
#    sleep(1)