#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(TEST_TARGET_date)
#include <varch/command.h>
#include <varch/date.h>
#else  
#include "init.h"
#include "command.h"
#include "date.h"
#endif

#if 0
static int century_days(int century)
{
    int days = 0;
    int year = (century - 1) * 100 + 1;

    for (int i = 0; i < 100; i++)
    {
        days += date_year_days(year + i);
    }

    return days;
}

static int thousand2_days(int base)
{
    int days = 0;

    for (int i = 0; i < 2000; i++)
    {
        days += date_year_days(base + i);
    }

    return days;
}

static int thousand3_days(int base)
{
    int days = 0;
    int century = (base / 100) + 1;

    for (int i = 0; i < 20; i++)
    {
        // days += century_days(century + i);
        days += date_century_days(century + i);
    }

    return days;
}
#endif 

static void usage(void)
{
    printf(
"Usage: date [opt] [arg]\n"
"\n"
"options:\n"
"    -h                  Print help\n"
"    -v                  Print version\n"
"\n"
"argument:\n"
"    <read>              Test default read function\n"
"    <write>             Test default write function\n"
    );
}

static int test(int argc, char *argv[])
{
    /* reset getopt */
    command_opt_init();

    while (1)
    {
        int opt = command_getopt(argc, argv, "hv");
        if (opt == -1) break;

        switch (opt) 
        {
        case 'v' :
            printf("date version %d.%d.%d\r\n", DATE_V_MAJOR, DATE_V_MINOR, DATE_V_PATCH);
            return 0;
        case '?':
            printf("Unknown option `%c`\r\n", command_optopt);
            return -1;
        case 'h' : 
        default:
            usage();
            return 0;
        }
    }

    printf("month days %d\r\n", date_month_days(2024, 11));
    printf("date_isleap %d\r\n", date_isleap(1582));
    // printf("date_current_days %d\r\n", date_current_days(DATE(1,1,1)));
    // printf("date_current_days %d\r\n", date_current_days(DATE(2000,12,31)));
    // printf("date_current_days %d\r\n", date_current_days(DATE(2001,1,1)));
    // printf("date_current_days %d\r\n", date_current_days(DATE(2024,11,9)));
    printf("date_get_week %d\r\n", date_get_week(DATE(2024,11,11)));

    printf("date_diff_days %d\r\n", date_diff_days(DATE(2018,3,14), DATE(2024,11,10)));

    // DATE date = date_from_days(date_current_days(DATE(2024,11,30)));
    DATE date = date_offset(DATE(2024,11,30), -1);

    printf("%d.%d.%d\r\n", date.year,date.month,date.day);

    date_show(1998,7);
    date_show(2024,11);
    date_show(2224,11);
    
    return 0;
}

#if defined(TEST_TARGET_date)
int main(int argc, char *argv[])
{
    return test(argc, argv);
}
#else 
void test_date(void)
{
    command_export("date", test);
}
init_export_app(test_date);
#endif