import machine
from machine import Pin, I2C, ADC
from time import sleep
import ssd1306
import dht
import math

#### HALL BUTTON AND MOTION SENSOR #####################
button = machine.Pin(13, machine.Pin.IN, machine.Pin.PULL_UP)
ms_hall = Pin(5, Pin.IN)
led_blue = Pin(18, Pin.OUT)
button_falling = 0
ms_hall_rising = False
button_state = 1
ms_hall_state = False
button_before = 1
ms_hall_before = False
hall_door = 0
hall_counter = 0

#### ROOM MOTION SENSORS ###############################
ms_room_1 = Pin(4, Pin.IN)
ms_room_2 = Pin(2, Pin.IN)
led_red = Pin(22, Pin.OUT)
ms_room_1_rising = False
ms_room_2_rising = False
ms_room_1_state = False
ms_room_2_state = False
ms_room_1_before = False
ms_room_2_before = False
room_door = 0
room_counter = 0


#senso de temp ntc
sensorNTCIn = ADC(Pin(12))
sensorNTCOut = ADC(Pin(27))
janela = 0
AC = 0

#ESP32 Pin assignment 
#OLED
i2c = I2C(0, scl=Pin(19), sda=Pin(21))

oled_width = 128
oled_height = 64
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)

oled.text('starting...', 0, 0)
#oled.setCursor(57, 4);
#oled.print(temp, 1);
#oled.print("C  ");
#oled.setCursor(57, 5);
#oled.print(hum, 1);
#oled.print("%  ");
oled.show()

#sensor de temp e humidade
sensor = dht.DHT22(Pin(15))
hum_anterior = 0
hum = 0

#sensor de luz ldr
ldrIn= ADC(Pin(14))
ldrOut= ADC(Pin(26))
cortina = 0
luz = 0

#ldr.atten(ADC.ATTN_11BD)


print('«Energy efficiency monitoring system»')

while True:
    try:

        #### HALL BUTTON AND MOTION SENSOR #####################
        #read button and motion sensor
        button_state = button.value()
        ms_hall_state = ms_hall.value()
        #detect falling edge of button and rising of sensor
        if (button_state==0) and (button_before==1):
            button_falling = 1
        elif (ms_hall_state) and not(ms_hall_before):
            ms_hall_rising = True
        #detect person entering or exiting
        if (button_falling==1) and (hall_door==0): #start entering
            hall_door = 1
            print("Hall door opening")
        elif (ms_hall_rising) and (hall_door==1): #end entering
            hall_door = 0
            hall_counter += 1
            print("Hall door closing")
        elif (ms_hall_rising) and (hall_door==0): #start exiting
            hall_door = 1
            print("Hall door opening")
        elif (button_falling==1) and (hall_door==1): #end exiting
            hall_door = 0
            print("Hall door closing")
            if (hall_counter>=1):
                hall_counter -= 1
        #variables refresh
        button_before = button_state
        ms_hall_before = ms_hall_state
        button_falling = 0
        ms_hall_rising = False
        #refresh led value
        if (hall_door==1):
            led_blue.on()
        else:
            led_blue.off()
        #print hall counter
        #print('HALL COUNTER ', hall_counter)

        
        #### ROOM MOTION SENSORS ###############################
        #read motion sensors
        ms_room_1_state = ms_room_1.value();    
        ms_room_2_state = ms_room_2.value();  
        #detect rising edge of motion sensors
        if (ms_room_1_state) and not(ms_room_1_before):
            ms_room_1_rising = True
        elif (ms_room_2_state) and not(ms_room_2_before):
            ms_room_2_rising = True
        #detect person entering or exiting
        if (ms_room_1_rising) and (room_door==0):   #start entering
            room_door = 1 
            print("Room door opening")
        elif (ms_room_2_rising) and (room_door==1): #end entering
            room_door = 0
            room_counter+= 1
            print("Room door closing")
        elif (ms_room_2_rising) and (room_door==0): #start exiting
            room_door = 1
            print("Room door opening")
        elif (ms_room_1_rising) and (room_door==1): #end exiting
            room_door = 0
            print("Room door closing")
            if (room_counter >= 1):
                room_counter -= 1    
        #variables refresh
        ms_room_1_before = ms_room_1_state
        ms_room_2_before = ms_room_2_state
        ms_room_1_rising = False
        ms_room_2_rising = False
        #refresh led value
        if (room_door==1):
            led_red.on()
        else:
            led_red.off()
        #print room counter
        #print('ROOM COUNTER', room_counter)



        #Sensor ntc temp
        analogValue = sensorNTCIn.read()
        celsiusIn = 1 / (math.log(1 / (4095. / analogValue - 1)) / 3950 + 1.0 / 298.15) - 273.15
        #print('temperatureNTRIn :', round(celsiusIn,1),'ºC')
        analogValue1 = sensorNTCOut.read()
        celsiusOut = 1 / (math.log(1 / (4095. / analogValue1 - 1)) / 3950 + 1.0 / 298.15) - 273.15
        #print('temperatureNTROut :', round(celsiusOut,1),'ºC')

        if(janela == 0) and (AC == 0):                
            if (celsiusOut >= 25 and celsiusIn >= 25):           
                print('AC Arrefece');
                AC = -1; 
            elif (celsiusIn <= 17):
                print('AC Aquece');
                AC = 1;
            elif (celsiusOut <= 22 and celsiusIn >= 25):           
                print('Abrir Janela');
                janela = 1;
        elif(janela == 1):
            if(celsiusIn <= 20 or celsiusOut <= 15):
                print('Fechar Janela');
                janela = 0;
        else:
            if((celsiusIn >= 22 and AC == 1) or (celsiusIn <= 20 and AC == -1)):
                print('AC Desliga');
                AC = 0;

        ACAnterior = AC
        janelaAnterior = janela

        #Sensor LDR
        #Convert the analog value into lux value:
        analogValue = ldrIn.read();
        voltage = analogValue / 4096. * 5;
        resistance = 2000 * voltage / (1 - voltage / 5);
        luxIn = int(pow(50 * 1e3 * pow(10, 0.7) / resistance, (1 / 0.7)));
    #print('ldr: ',lux)
        analogValue = ldrOut.read();
        voltage = analogValue / 4096. * 5;
        resistance = 2000 * voltage / (1 - voltage / 5);
        luxOut = int(pow(50 * 1e3 * pow(10, 0.7) / resistance, (1 / 0.7)));

        if (luxIn >= 500):
            if (luxOut >= 2000 and cortina == 1):
                print('Cortinas Fechadas')
                cortina = 0
            elif (luz == 1):
                print('Luzes Desligadas')
                luz = 0
        elif (luxIn <= 300 and luz == 0):
            if (luxOut >= 400 and cortina == 0):
                print('Cortinas Abertas')
                cortina = 1
            else:
                print('Luzes Ligadas')
                luz = 1
        


        #Sensor temp e humidade
        sensor.measure()
        temp=sensor.temperature()
        hum=sensor.humidity()
        if(hum>60) and (hum_anterior<=60):
            print("Acender deshumidificador")
        elif(hum<=60) and (hum_anterior>60):
            print("Apagar deshumidificador")
    #print('temperature :', temp, 'humidity:', hum)
        hum_anterior=hum
        

        oled.fill(0) #limpa o OLED


        #mostra temp e humidade no oled
        show_string= 'T :'+ str(temp)+' C '
        oled.text(show_string, 0, 10)
        show_string= 'humidity: '+ str(hum)+'% '
        oled.text(show_string, 0, 30)
        
        oled.show()

        sleep(1)
    except OSError as err:
            print('falha na leitura')