#include "X25128.h"
#include "LCD.h"
#include "ds1820.h"

char current_main_menu[16];
char current_menu_number[2];
char nbr_of_termometers[1];
char nbr_of_other_menus;

struct menu{
  char string[16];
};

/*
  Initierar menyn, detta måste göras efter att
  find_slave är anropat, så att det är fastställt
  hur många termometrar det finns.
*/
void init_menu(void){
  char nbr_of_other_menus;
  char address[2];
  address[0] = 0x00;
  address[1] = 0x00;
  X25128_read_data(nbr_of_termometers, 0x01, address);

  nbr_of_other_menus = 0;

  nbr_of_termometers[0] = ds1820_nbr_of_thermos();
  current_menu_number[0] = 0xFF;
}

/*
  Uppdaterar sub_menyn, används enbart internt.
*/
char menu_char_temp[4];

monitor void menu_update_sub_menu(void){
  int int_temp[2];
  char address[2];
  int tmp;
  switch(current_menu_number[1]){
  case 0:  //Aktuellt värde
    tmp = (1 + (8 + 14 + 0 * 4)* nbr_of_termometers[0] + 
current_menu_number[0] * 4);
    break;
  case 1:  //Min-värde
    tmp = (1 + (8 + 14 + 1 * 4)* nbr_of_termometers[0] + 
current_menu_number[0] * 4);
    LCD_write_string(0x41, "Min");
    break;
  case 2:  //Max-värde
    tmp = (1 + (8 + 14 + 2 * 4)* nbr_of_termometers[0] + 
current_menu_number[0] * 4);
    LCD_write_string(0x41, "Max");
    break;
/*
  case 3:  //Medel-värde
    tmp = (1 + (8 + 14 + 3 * 4)* nbr_of_termometers[0] + 
current_menu_number[0] * 4);
    LCD_write_string(0x41, "Medel");
    break;
*/
  }
  address[1] = tmp%256;
  address[0] = tmp/256;
  X25128_read_data(menu_char_temp, 4, address);
  int_temp[0] = ds1820_convert_temp(menu_char_temp);          //lägger 
heltalsdelen av temperaturen i int_temp[0]
  ds1820_convert_temp_decimals(menu_char_temp, int_temp);     //lägger 
decimaldelen av temperaturen i char_temp[1]
  LCD_write_temp(0x47, int_temp);
  LCD_write_character(0x40, 0x3C);
  LCD_write_character(0x4F, 0x3E);
}

/*
  Ritar om hela menyn, samt hämtar nya mätvärden
  om det behövs.
*/
monitor void menu_update(void){
  if(current_menu_number[0] != 0xFF){
    LCD_cls();
    LCD_write_string(0x01, current_main_menu);
    LCD_write_character(0x00, 0x7F);
    LCD_write_character(0x0F, 0x7E);
    menu_update_sub_menu();
  }
}

/*
  Laddar in menyns namn från minnet, och uppdaterar skärmen
*/
void menu_update_main_menu(void){
  char address[2];
  address[0] = 0x00;
  address[1] = 0x01 + nbr_of_termometers[0] * 8 + current_menu_number[0] * 
14;
  X25128_read_data(current_main_menu, 0x10, address);
  menu_update();
}

/*
  Byter till nästa huvudmeny.
*/
void menu_next_main_menu(void){
  if(current_menu_number[0] == 0xFF){
    current_menu_number[0] = 0;
  }
  else{
    current_menu_number[0] = (current_menu_number[0] + 1) % 
(nbr_of_termometers[0] + nbr_of_other_menus);
  }
  menu_update_main_menu();
}

/*
  Byter till föregående huvudmeny.
*/
void menu_last_main_menu(void){
  if(current_menu_number[0] == 0 || current_menu_number[0] == 0xFF)
    current_menu_number[0] = nbr_of_termometers[0] + nbr_of_other_menus - 1;
  else
    current_menu_number[0] = (current_menu_number[0] - 1);
  menu_update_main_menu();
}

/*
  Byter till nästa submeny.
*/
void menu_next_sub_menu(void){
  if(current_menu_number[0] < nbr_of_termometers[0])
    current_menu_number[1] = (current_menu_number[1] + 1 + 3) % 3;
  else
    ;     //Andra menyer än termometrar
  menu_update();
}

/*
  Byter till föregående submeny.
*/
void menu_last_sub_menu(void){
  if(current_menu_number[0] < nbr_of_termometers[0])
    current_menu_number[1] = (current_menu_number[1] - 1 + 3) % 3;
  else
    ;     //Andra menyer än termometrar
  menu_update();
}

char menu_get_current_main_menu(void){
  return current_menu_number[0];
}