import machine
import utime
from machine import Pin, SPI, ADC
from ili934xnew import ILI9341
import tt32
import glcdfont
import dht
from rotary_irq_esp import RotaryIRQ

# Pin configurations
start_button_pin = 27  # GPIO16
temp_sensor_pin = 28  # GPIO26 (analog pin for temperature sensor)
relay_pin = 5  # GPIO5 for the relay
encoder_clk_pin = 14  # GPIO14 for rotary encoder
encoder_dt_pin = 12  # GPIO12 for rotary encoder

DATA_PIN = machine.Pin(28, machine.Pin.IN, machine.Pin.PULL_UP)
sensor = dht.DHT22(DATA_PIN)

# TFT display configuration
spi = machine.SPI(1, baudrate=40000000, sck=machine.Pin(18), mosi=machine.Pin(19))
tft = ILI9341(
    spi,
    cs=machine.Pin(22),
    dc=machine.Pin(20),
    rst=machine.Pin(21),
    w=320,  # Adjust the width based on your display resolution
    h=240,  # Adjust the height based on your display resolution
    r=1,    # Adjust the rotation based on your needs
)
tft.set_font(tt32)
tft.fill_rectangle(0, 0, tft.width, tft.height, 0x00000000)  

# Button and encoder instances
start_button = Pin(start_button_pin, machine.Pin.IN, machine.Pin.PULL_UP)
relay = Pin(relay_pin, machine.Pin.OUT)
encoder = RotaryIRQ(pin_num_clk=encoder_clk_pin, pin_num_dt=encoder_dt_pin)

# Initial setpoint temperature
setpoint_temperature = 25.0

# ON/OFF control parameters
hysteresis = 1.0  # Hysteresis for ON/OFF control

# Variable to check if the start button has been pressed at least once
start_pressed = False

def display_temperature_info(current_temperature, setpoint_temperature):
    current_text = "Current Temp: {:.2f} C\nSetpoint Temp: {:.2f} C".format(current_temperature, setpoint_temperature)

    tft.fill_rectangle(0, 0, tft.width, tft.height, 0x00000000)
    tft.set_pos(0, 15)
    tft.set_color(0xFFFF, 0x0000)
    tft.print(current_text)

# Main loop
while True:
    # Read temperature from sensor
    sensor.measure()
    current_temperature = sensor.temperature()

    # Check if START button is pressed to activate the temperature controller
    if not start_pressed and not start_button.value():  # Invert the logic
        start_pressed = True
        # Display temperature information
        display_temperature_info(current_temperature, setpoint_temperature)

    # If the start button has been pressed, continue updating the display
    if start_pressed:
        # Check if the temperature is higher than the setpoint
        if current_temperature > setpoint_temperature:
            # Turn on the relay (assuming HIGH activates the relay)
            relay.value(1)
        else:
            # Turn off the relay
            relay.value(0)

        # Read the encoder value and update the setpoint_temperature
        encoder_value = encoder.value()
        setpoint_temperature += encoder_value

        # Update and display temperature information
        display_temperature_info(current_temperature, setpoint_temperature)

    utime.sleep(1)  # Adjust the delay based on your requirements