// LCD1602 and Pi Pico-W!
#include <LiquidCrystal.h>
#include <WiFi.h>

#define GOOD_PIN 2
#define OKAY_PIN 3
#define BAD_PIN 4

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

unsigned long debounce_duration = 50;
unsigned long state_change_time = 0;

byte last_button_state_good = LOW;
byte last_button_state_okay = LOW;
byte last_button_state_bad  = LOW;

const char* message_part1 = "How was class";
const char* message_part2 = "today?";

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

void print_message_to_lcd()
{
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(message_part1);
  lcd.setCursor(0, 1);
  lcd.print(message_part2);
}

void print_connecting_sequence()
{
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Connecting.");
  delay(250);
  lcd.setCursor(0,0);
  lcd.print("Connecting..");
  delay(250);
  lcd.setCursor(0,0);
  lcd.print("Connecting...");
  delay(250);
}

void print_setup_sequence()
{
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Connected!");
  lcd.setCursor(0, 1);
  lcd.print("IP: ");
  lcd.setCursor(5, 1);
  lcd.print(WiFi.localIP());
  delay(1000);

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Setting up pins!");
  delay(1000);
}

void print_option_sequence(const char* msg)
{
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(msg);
  delay(250);
  print_message_to_lcd();
}

void setup() {
  lcd.begin(16, 2);

  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID);
  while (WiFi.status() != WL_CONNECTED)
  {
    print_connecting_sequence();
  }

  print_setup_sequence();

  pinMode(GOOD_PIN, INPUT);
  pinMode(OKAY_PIN, INPUT);
  pinMode(BAD_PIN, INPUT);

  digitalWrite(GOOD_PIN, LOW);
  digitalWrite(OKAY_PIN, LOW);
  digitalWrite(BAD_PIN, LOW);

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Pin setup done!");
  delay(1000);

  print_message_to_lcd();
}

void loop() {

  if (millis() - state_change_time > debounce_duration)
  {
    byte button_state_good = digitalRead(GOOD_PIN);
    byte button_state_okay = digitalRead(OKAY_PIN);
    byte button_state_bad  = digitalRead(BAD_PIN);

    if (button_state_good != last_button_state_good)
    {
      state_change_time = millis();
      last_button_state_good = button_state_good;
      if (button_state_good == LOW)
      {
        print_option_sequence("GOOD");
      }
    }
    if (button_state_okay != last_button_state_okay)
    {
      state_change_time = millis();
      last_button_state_okay = button_state_okay;
      if (button_state_okay == LOW)
      {
        print_option_sequence("OKAY");
      }
    }
    if (button_state_bad != last_button_state_bad)
    {
      state_change_time = millis();
      last_button_state_bad = button_state_bad;
      if (button_state_bad == LOW)
      {
        print_option_sequence("BAD");
      }
    }
  }
  delay(1); // Adding a delay() here speeds up the simulation
}