#include "pg_bikram_sambat.h"

/*
    parses BSDateADTi date string (cstring) and returns the internal Julian representation
*/
BSDateADT
parse_bs_date_internal(const char *str)
{
    int year, month, day;
    int found;
    DateParts adDate;

    found = sscanf(str, "%d/%d/%d", &year, &month, &day);
    if (found != 3)
        found = sscanf(str, "%d-%d-%d", &year, &month, &day);
    if (found != 3)
        found = sscanf(str, "%d.%d.%d", &year, &month, &day);
    if (found != 3)
    {
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
                 errmsg("invalid input syntax for bs_date: \"%s\"", str),
                 errhint("Use YYYY/MM/DD or DD/MM/YYYY. Valid separators are /, -, and .")));
    }

    /*
      swap year and day if day is bigger than 1000 and year is lower than 1000
    */
    if (year < 1000 && day >= 1000)
    {
        int temp = year;
        year = day;
        day = temp;
    }

    adDate = bsToAd(year, month, day);
    return date2j(adDate.year, adDate.month, adDate.day) - POSTGRES_EPOCH_JDATE;
}