/* 
A simple Arduino UNO Program that switches between 4 LED modes:
1.  x-mas mode that just are flickering lights
2.  running lights, to do a sense of motion
3.  pulsing effect using PWM
4.  party effect that is simply simulating party lights XD

Um programa simples em Arduino UNO que muda entre 4 Modos de LED:
1.  modo de natal com luzes piscantes
2.  luzes correntes, que dão uma sensação de movimento
3.  efeito pulsante usando PWM
4.  efeito de festa que simula luzes de festa XD
*/
#include <LiquidCrystal_I2C.h>

// LCD variables:
#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

// Other variables:
const int button_pin = 0;
int mode = 0;

// pins variables:
const int x_mas_set[] = {5,6,7};
const int motion_pins[] = {9,10,11,12,13}

void set_text(const char* text, int columm = 0, bool clear = true){    // sets the LCD text to some other text
  if (clear){
    lcd.clear();
  }
  lcd.setCursor(0,columm);
  lcd.print(text);
}

void init_pins(int list[], size, mode=OUTPUT){
  for(i=0;i<size;i++){
    pinMode(list[i], mode);
  }
}

void switch_mode(){
  end_modes();
  switch(mode){
    case 0:
    set_text("Current mode:");
    set_text("None", 1, false);
    break;
    case 1:
    set_text("Current mode:");
    set_text("x_mas", 1, false);
    x_mas();
    break;
    case 2:
    set_text("Current mode:");
    set_text("Motion Lights", 1, false);
    break;
    case 3:
    set_text("Current mode:");
    set_text("Pulsing Lights", 1, false);
    break;
    case 4:
    set_text("Current mode:");
    set_text("Party Lights", 1, false);
    break;
  }
  mode++;
  if (mode == 5){
    mode = 1;
  }
}

void verify_button(){
  delay(100);
  pinMode(button_pin, INPUT_PULLUP);
  if (digitalRead(button_pin) == LOW){
    switch_mode();
  }
}

void end_modes(){
  end_x_mas();
  set_text("Current mode:");
  set_text("None", 1, false);
}

void x_mas(){   // x-mas lights main function
  init_pins(x_mas_set, 3)
  for (int i = 0; i < 20; i++) {
    for (int j = 0; j < 3; j++) {
      digitalWrite(x_mas_set[j], HIGH);
      delay(100);
      digitalWrite(x_mas_set[j], LOW);
      delay(100);
    }
  }
  delay(1000);
  for (int i = 0; i < 20; i++) {
    int msdelay = 1000 / (i+1);
    digitalWrite(x_mas_set[0], HIGH);
    delay(msdelay);
    digitalWrite(x_mas_set[1], HIGH);
    delay(msdelay);
    digitalWrite(x_mas_set[0], LOW);
    digitalWrite(x_mas_set[2], HIGH);
    delay(msdelay);
    digitalWrite(x_mas_set[1], LOW);
    delay(msdelay);
    digitalWrite(x_mas_set[2], LOW);
  }

  delay(1000);
  end_modes();
}

void end_x_mas() {
  for (int i = 0; i < sizeof(x_mas_set) / sizeof(x_mas_set[0]); i++) {
    if (digitalRead(x_mas_set[i]) == HIGH) {
      digitalWrite(x_mas_set[i], LOW);
    }
  }
}

void motion_lights(){   // motion effect main function
  init_pins(motion_pins, 5)
}

void pulsing_lights(){  // pulsing effect main function
  //
}

void party_lights(){
  //
}

void setup() {
  lcd.init();
  switch_mode();
}

void loop() {
  verify_button();
}