#include <stdint.h>
#include <stddef.h>  // NULL
#include <string.h>  // memcmp
#include <strings.h>
#include "epoch.h"

uint8_t monthGetDays(Month month, Year *year) {
    switch (month) {
    case January:
    case March:
    case May:
    case July:
    case August:
    case October:
    case December:
        return 31;
    case February:
        switch (year->tag) {
        case leapYear:
            return 28;
        default:
            return 29;
        }
    default:
        return 30;
    }
}

uint32_t monthGetSeconds(Month month, Year *year) {
    return (int64_t)monthGetDays(month, year) * SECONDS_PER_DAY;
}

int monthIncrement(Month *month) {
    if (*month == December)
        return 1;
    else
        *month += 1;
    return 0;
}

int monthDecrement(Month *month) {
    if (*month == January)
        return  1;
    else
        *month -= 1;
    return 0;
}

const char *MonthNames[] = { "January", "February", "March", "April", "May", "June",
    "July", "August", "September", "October", "November", "December" };
const char *MonthAbbrs[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
    "Aug", "Sep", "Oct", "Nov", "Dec" };

const char* monthName(Month month) {
    return MonthNames[month - 1];
}

const char* monthAbbr(Month month) {
    return MonthAbbrs[month - 1];
}

int parseMonth(const char *s) {
    int i;
    for (i = 0; i < 12; i++) {
        if (strncasecmp(s, MonthAbbrs[i], 4) == 0 || strncasecmp(s, MonthNames[i], 10) == 0)
            return i + 1;
    }
    return -1;
}