"""
Villafaña Oliva César Omar
Mosqueda Hernández Josué Mosqueda
Arellano Fuentes Cristian Yael
Objective: Implement menu navigation with joystick, interrupt execution,
           and change option upon receiving and decoding IR remote signals.
"""

from machine import Pin, ADC
import time
import ir_rx
from menu import Menu

remoteOption = 0x00 # The IR remote reading
position = 1 # The current option where the line is positioned
changeOption = [False] # Indicate that an immediate change must be made if another option was pressed on the remote
joyPressed = 1 # Indicate that the joystick is not pressed (0-pressed, 1-not pressed)

codeDict = {0x68:0, 0x30:1, 0x18:2, 0x7a:3, 0x10:4, 0x38:5, 0x5a:6, 0x42:7,
               0x4a:8, 0x52:9, 0x2:"up", 0x90:"right", 0x98:"down", 0xe0:"left", 0x1c:"OK",
               0x22:"asterisk", 0xc2:"hashtag"}

# IR receiver interrupt function
def callback(data, addr, ctrl):
    global remoteOption, joyPressed
    # If the user is not in the menu because a signal was received or the joystick was pressed  
    if remoteOption > 0x00 or not joyPressed:
        changeOption[0] = True # Indicate that it is necessary to change to another option
        joyPressed = True # Indicate that the joystick is not pressed (1) to not show the menu
    if data > 0x00: # If the reading was not a button release
        remoteOption = data # Register the hexadecimal number of the read button
    print("Code pattern detected: ", hex(remoteOption))

# Show the menu and a line below the current option.
def showMenu():
    menu.mostrar_texto(message, 0, 10) # Show menu at (0, 10)
    menu.oled.pintar_linea(18 + position*10, 1) # Below option 1 is at x=18; each subsequent option moves down by 10. 

# Update the line of the current option; displacement indicates how many options it went up or down 
def moveLine(displacement):
    global position
    menu.oled.pintar_linea(18 + position*10, 0) # Paint a black line at the current position (erase).
    position += displacement # Update line position
    menu.oled.pintar_linea(18 + position*10, 1) # White line underneath; Below option 1 is at x=18; each subsequent option moves down by 10. 

# Configure the pin to connect the IR receiver
pin_ir_rx = Pin(26, Pin.IN)
# Create an instance of the IR receiver with the NEC_16 protocol
ir = ir_rx.NEC_16(pin_ir_rx, callback)
# Joystick
vry = ADC(Pin(12, Pin.IN)) # vertical movement 
vry.atten(ADC.ATTN_11DB) # attenuation adjustment
button = Pin(14, Pin.IN, Pin.PULL_UP) # joystick press; 1 when not pressed

if __name__ == '__main__':
    menu = Menu(pin_scl=21, pin_sda=22, pin_ldr=34, pin_dht=2, cambiarOpcion=changeOption) # Used pins and change state
    message = ("Show:",
               "1.- Luminosity.", 
               "2.- Temperature.",
               "3.- Humidity.",
               "4.- Names.") # Menu options
    showMenu() # Show the menu for the first time
        
def readJoystick():
    global joyPressed, position
    valueY = vry.read() # read vertical point
    joyPressed = button.value() # read button state
    if joyPressed == False: # If the button was pressed (0 - pressed, 1 - not pressed)
        menu.opciones(position) # Execute the option at the current position 
    if valueY < 200: # If moved upwards (close to 0 for lower sensitivity)
        if position != 1: # If not at the upper limit 
            moveLine(-1) # Move the line 1 position back
    elif valueY > 3700: # If moved downwards (close to 4096 for lower sensitivity)
        if position != 4: # If not at the lower limit 
            moveLine(1) # Move the line 1 position forward

def readRemote():
    global remoteOption, position, changeOption
    if remoteOption > 0x00: # Detect if it wasn't held down 
        option = codeDict[remoteOption] # Get the corresponding button
        print(remoteOption, option)
         
        if option == "up": 
            if position != 1: # If not at the upper limit
                position -= 1 # Go up
                menu.opciones(position) # Execute the option at the current position 
        elif option == "down": 
            if position != 4: # If not at the lower limit
                position += 1 # Go down
                menu.opciones(position) # Execute the option at the current position
        elif option == "OK":  
                menu.opciones(position) # Execute the option at the current position
        else:
            menu.opciones(option) # Execute the option
            if option in range(1,5): # If the option is valid (1-4)
                position = option # Update the current line position
            
        if changeOption[0] == False: # If it has not been indicated to change the option
            remoteOption = 0x00 # Reset the option received by the receiver 
            showMenu() # Show the menu again
            
        changeOption[0] = False # The option change has already been made for this cycle
        
# Infinite loop to detect and decode IR signals
while True: 
    # Read joystick 
    readJoystick()
    # Wait for remote control signal
    readRemote()
        
    if joyPressed == False: # If the joystick was pressed in this cycle
        showMenu() # Show the menu again