#include "mbed.h"
#include "time.h"

Serial pc(USBTX,USBRX);

char c;
char sav[40];
struct tm t;
char str[32];
time_t seconds;

void Input()
{
    memset(sav, 0, 40);
    do {
        c = pc.getc();
        pc.putc (c);
        strcat(sav, &c);
    } while (c != ' ');
}

void Inputyear()
{
    pc.printf("\nPlease input local year then press [space] - YYYY ( Year 1900 onwards)\n\r");
    Input();
    if ( c >= 1900 ) {
        t.tm_year = atoi(sav);
    } else {
        printf("Error, please input the correct local year again\n\n\r");
        Inputyear();
    }
}

void Inputmonth()
{
    pc.printf("\nPlease input local month then press [space] - MM (Between 01-11)\n\r");
    Input();
    if ( c >= 1 && c <= 11) {
        t.tm_mon = atoi(sav);
    } else {
        printf("Error, please input the correct local month again\n\n\r");
        Inputmonth();
    }
}

void Inputday()
{
    pc.printf("\nPlease input local day then press [space] - DD (Between 01-31)\n\r");
    Input();
    if ( c >= 1 && c <= 31) {
        t.tm_mday = atoi(sav);
    } else {
        printf("Error, please input the correct local day again\n\r");
        Inputday();
    }
}

void Inputhour()
{
    pc.printf("\nPlease input local hour then press [space] - HH (Between 00-23)\n\r");
    Input();
    if ( c <= 23) {
        t.tm_hour = atoi(sav);
    } else {
        printf("\nError, please input the correct local hour again\n\r");
        Inputhour();
    }
}

void Inputmin()
{
    pc.printf("\nPlease input local minute then press [space] - mm (Between 00-59)\n\r");
    Input();
    if ( c <= 59) {
        t.tm_min = atoi(sav);
    } else {
        printf("Error, please input the correct local minute again\n\r");
        Inputmin();
    }
}

void Inputsec()
{
    pc.printf("\nPlease input local seconds then press [space] - ss (Between 00-59)\n\r");
    Input();
    if ( c <= 59) {
        t.tm_sec = atoi(sav);
    } else {
        printf("Error, please input the correct local seconds again\n\n\r");
        Inputsec();
    }
}

void TimeSet() // time setting function
{
    pc.printf("=====SETTING TIME=====\n");

    do {
        Inputyear();
        Inputmonth();
        Inputday();
        Inputhour();
        Inputmin();
        Inputsec();
        pc.printf("\n\r Is the time correct? [Y/N] then press [space]\n\n\r");
        c = pc.getc();
    } while (c != 'y' && c != 'Y');

    t.tm_year = t.tm_year - 1900;
    t.tm_mon = t.tm_mon - 1;

    set_time(mktime(&t));
}

void TimeStart() // print out the time every 1 seconds
{
    time_t seconds = time(NULL);
    strftime(str, 32,"%H:%M:%S", localtime(&seconds));
    pc.printf("%s.\n\n\r", str);
    wait(1);
}

int main()
{
    TimeSet();
    TimeStart();
}

void Inputyear()
{
    pc.printf("\nPlease input local year then press [space] - YYYY ( Year 1900 onwards)\n\r");
    Input();
    if ( c >= 1900 ) {
        t.tm_year = atoi(sav);
    } else {
        printf("Error, please input the correct local year again\n\n\r");
        Inputyear();
    }
}