#include <avr/io.h>
#include <util/delay.h>
//#include "dht22.h"

// Definições do LCD
#define LCD_DADOS PORTA // Porta A para dados
#define LCD_CONTROLE PORTH // Porta H para controle
#define RS PH5 // Pino 8 do Arduino Mega
#define E PH3 // Pino 6 do Arduino Mega
#define D4 PA4 // Pino 26 do Arduino Mega
#define D5 PA5 // Pino 27 do Arduino Mega
#define D6 PA6 // Pino 28 do Arduino Mega
#define D7 PA7 // Pino 29 do Arduino Mega

// Definições do Sensor DHT22
#define DHT22_PIN PH6 // Pino 9 do Arduino Mega

// Protótipos de função
void init_LCD();
void LCD_command(unsigned char command);
void LCD_dados(unsigned char data);
void LCD_string(char *str);
void LCD_clear();
void read_DHT22(uint8_t *temp_int, uint8_t *temp_dec);

// Definindo os textos que serão exibidos no led
char txt1[] = "Temperatura";
char txt2[] = "Min:"
char txt3[] = "Max:"
char txt4[] = "Media:"

void show_SCREEN_HOME()
{
  send_command_to_LCD(0X01, 0); // clear display
  send_command_to_LCD(0X80, 0);
  show_temperature_on_LCD();
}

void show_temperature_on_LCD()
{
  float aux_temp = sensor_temperature;
  char unit[2]; unit[0] = 'C'; unit[1] = '\0';
  
  if(TEMP_UNIT_OPTION == TEMP_FAHRENHEIT){
    aux_temp = (sensor_temperature * (9.0/5.0)) + 32;
    unit[0] = 'F';
  }else if (TEMP_UNIT_OPTION == TEMP_KELVIN){
    aux_temp = sensor_temperature + 273.15;
    unit[0] = 'K';
  }

  char str_temperature[20];
  dtostrf(aux_temp, 6, 2, str_temperature);
  
  writes_on_LCD("Temp:    ");
  writes_on_LCD(str_temperature);
  writes_on_LCD(unit);
}

void check_sensor_informations()
{
  // Se temperatura do sensor for menor que 34 ou maior que 45
  if ( (sensor_temperature < MIN_TEMP || sensor_temperature > MAX_TEMP) 
    && (CURRENT_SCREEN == SCREEN_HOME || CURRENT_SCREEN == SCREEN_WARN_LIMIT) )
  {
    // LED acende (como fazer isso?)

    CURRENT_SCREEN = SCREEN_WARN_LIMIT;
    update_screen();
  }
  else if (CURRENT_SCREEN == SCREEN_WARN_LIMIT)
  {
    CURRENT_SCREEN = SCREEN_HOME;
    update_screen();
  }
}

void show_SCREEN_WARN_LIMIT()
{ 
  float aux_temp = sensor_temperature;
  char unit[2]; unit[0] = 'C'; unit[1] = '\0';
  
  if(TEMP_UNIT_OPTION == TEMP_FAHRENHEIT){
    aux_temp = (sensor_temperature * (9.0/5.0)) + 32;
    unit[0] = 'F';
  }else if (TEMP_UNIT_OPTION == TEMP_KELVIN){
    aux_temp = sensor_temperature + 273.15;
    unit[0] = 'K';
  }

  char str_temperature[20];
  dtostrf(aux_temp, 4, 1, str_temperature);

  char str_humidity[20];
  dtostrf(sensor_humidity, 3, 1, str_humidity);

  send_command_to_LCD(0X01, 0);
  send_command_to_LCD(0X80, 0);
  writes_on_LCD(" LIMIT EXCEEDED");
  send_command_to_LCD(0XC0, 0);
  writes_on_LCD("T:");
  writes_on_LCD(str_temperature);
  writes_on_LCD(unit);
  writes_on_LCD(" H: ");
  writes_on_LCD(str_humidity);
  writes_on_LCD("%");

  _delay_ms(1000);
  turn_on_red_led();
}

void update_screen()
{
  switch(CURRENT_SCREEN){
    case SCREEN_HOME:
      show_SCREEN_HOME();
      break;
    case SCREEN_SETUP:
      show_SCREEN_SETUP();
      break;
    case SCREEN_TUNIT:
      show_SCREEN_TUNIT();
      break;
    case SCREEN_TEMP:
      show_SCREEN_TEMP();
      break;
    case SCREEN_MIN_TEMP:
      show_SCREEN_MIN_TEMP();
      break;
    case SCREEN_MAX_TEMP:
      show_SCREEN_MAX_TEMP();
      break;
    case SCREEN_HUM:
      show_SCREEN_HUM();
      break;
    case SCREEN_MIN_HUM:
      show_SCREEN_MIN_HUM();
      break;
    case SCREEN_MAX_HUM:
      show_SCREEN_MAX_HUM();
      break;
    case SCREEN_SAMPPLING:
      show_SCREEN_SAMPPLING();
      break;
    case SCREEN_WARN_SMOKE:
      show_SCREEN_WARN_SMOKE();
      break;
    case SCREEN_WARN_LIMIT:
      show_SCREEN_WARN_LIMIT();
      break;
    default:
      show_error();
      break;
  }
}


// char i; // variável para loop

// int main(void)
// {
//   // Função que inicializa o LCD
//   Lcd_Init();

//   // Função que limpa o LCD
//   Lcd_Cmd(_LCD_CLEAR);
//   // Função para desligar o cursor
//   Lcd_Cmd(_LCD_CURSOR_OFF);

//   Lcd_Out(1,6,txt1);
// }

// // função usada para mover
// void Move_Delay() {
//   _delay_ms(500);
// }