#include "menu.h"
#include <stdlib.h>
#include <string.h>

menu_state_t state = OFF;
uint8_t selected = 0;

int8_t menu_val_timezone_ee EEMEM;
int8_t menu_val_timezone;
uint8_t menu_val_format_ee EEMEM;
uint8_t menu_val_format;
uint8_t menu_val_leds_ee EEMEM;
uint8_t menu_val_dots;
uint8_t menu_val_dots_ee EEMEM;

uint8_t get_menu_active(){
    if(state != OFF)
        return 1;
    return 0;
}

void enter_menu(){
    switch(state){
        case OFF:
            state = 1;
            break;
        case EXIT:
            state = OFF;
            break;
        default:
            selected ^= 1;
            break;
    }
}

const char* get_menu_text(){
    char *res = "      ";

    memset(res, ' ', 6);
    if(selected)
        switch(state){
            case TIMEZONE:
                res = "      ";
                if(menu_val_timezone < 0)
                    res[3] = '-';
                else
                    res[3] = ' ';
                res[4] = abs(menu_val_timezone / 10)+0x30;
                res[5] = abs(menu_val_timezone % 10)+0x30;
                break;
            case FORMAT:
                res[2] = (menu_val_format / 10) + 0x30;
                res[3] = (menu_val_format % 10) + 0x30;
                res[4] = 'H';
                break;
            case LEDS:
                res[3] = (OCR2A / 100) + 0x30;
                res[4] = (OCR2A / 10 % 10) + 0x30;
                res[5] = (OCR2A % 10) + 0x30;
                break;
            case DOTS:
                if(menu_val_dots)
                    res = "   AN ";
                else
                    res = "   AUS";
                break;
            default:
                res = "ERROR ";
                break;
        } 
    else
        switch(state){
            case TIMEZONE:
                res = "ZONE  ";
                eeprom_write_byte((uint8_t*)&menu_val_timezone_ee, menu_val_timezone);
                break;
            case FORMAT:
                res = "FORMAT";
                break;
            case LEDS:
                res = "LED   ";
                eeprom_write_byte(&menu_val_leds_ee, OCR2A);
                break;
            case DOTS:
                res = "PUNKTE";
                eeprom_write_byte((uint8_t*)&menu_val_dots_ee, menu_val_dots);
                break;
            case EXIT:
                res = "ZURUEK";
                break;
            default:
                res = "ERROR";
                break;
        } 
    return res;
}

void menu_up_down(uint8_t up_down){
    if(selected)
        switch(state){
            case TIMEZONE:
                menu_val_timezone += up_down;
                if(menu_val_timezone < -12)
                    menu_val_timezone = 12;
                if(menu_val_timezone > 12)
                    menu_val_timezone = -12;
                break;
            case FORMAT:
                if(menu_val_format == 12)
                    menu_val_format = 24;
                else if(menu_val_format == 24)
                    menu_val_format = 12;
                break;
            case LEDS:
                OCR2A += up_down;
                break;
            case DOTS:
                menu_val_dots ^= 0x01;
                break;
            default:
                break;
        } 
    else{
        state += up_down;
        if(state < 1)
            state = 1;
        if(state > EXIT)
            state = EXIT;//TIMEZONE;
    }
    //debug_menu();
}