/*                 _,.---._    .-._        .--.-. ,--.--------.
 *   _,..---._   ,-.' , -  `. /==/ \  .-._/==/  //==/,  -   , -\
 * /==/,   -  \ /==/_,  ,  - \|==|, \/ /, |==\ -\\==\.-.  - ,-./
 * |==|   _   _\==|   .=.     |==|-  \|  | \==\- \`--`\==\- \
 * |==|  .=.   |==|_ : ;=:  - |==| ,  | -|  `--`-'     \==\_ \
 * |==|,|   | -|==| , '='     |==| -   _ |             |==|- |
 * |==|  '='   /\==\ -    ,_ /|==|  /\ , |             |==|, |
 * |==|-,   _`/  '.='. -   .' /==/, | |- |             /==/ -/
 * `-.`.____.'     `--`--''   `--`./  `--`             `--`--`
 *                    _ __    ,---.      .-._         .=-.-.  _,.----.
 *                 .-`.' ,`..--.'  \    /==/ \  .-._ /==/_ /.' .' -   \
 *                /==/, -   \==\-/\ \   |==|, \/ /, /==|, |/==/  ,  ,-'
 *               |==| _ .=. /==/-|_\ |  |==|-  \|  ||==|  ||==|-   |  .
 *               |==| , '=',\==\,   - \ |==| ,  | -||==|- ||==|_   `-' \
 *               |==|-  '..'/==/ -   ,| |==| -   _ ||==| ,||==|   _  , |
 *               |==|,  |  /==/-  /\ - \|==|  /\ , ||==|- |\==\.       /
 *               /==/ - |  \==\ _.\=\.-'/==/, | |- |/==/. / `-.`.___.-'
 *               `--`---'   `--`        `--`./  `--``--`-`
 *
 *	@(#)Copyright (c) 2024, Nathan D. Fisher.
 *
 *      This is free software.  It comes with NO WARRANTY.
 *      Permission to use, modify and distribute this source code
 *      is granted subject to the following conditions.
 *      1/ that the above copyright notice and this notice
 *      are preserved in all copies and that due credit be given
 *      to the author.
 *      2/ that any changes to this code are clearly commented
 *      as such so that the author does not get blamed for bugs
 *      other than his own.
 */

#include "epoch.h"
#include <stdio.h>
#include <stdint.h>
#include <string.h>

int offsetNew(TzOffset *offs, offsetSign sign, uint8_t hours, uint8_t minutes) {
    if (offs == NULL) return 1;
    if (hours > 12) return 2;
    if (hours > 11 && minutes > 0) return 3;
    if (minutes > 59) return 4;
    offs->sign = sign;
    offs->hours = hours;
    offs->minutes = minutes;
    return 0;
}

void printTz(TimeZone *zone) {
    switch (zone->tag) {
    case UTC: printf("UTC");
    case Offset:
        switch (zone->offset->sign) {
        case Positive:
            puts("+");
            break;
        case Negative:
            puts("-");
            break;
        }
        default:
            break;
        printf("%.2u:%.2u", zone->offset->hours, zone->offset->minutes);
    }
}

int64_t timezoneAsSeconds(TimeZone *tz) {
    int64_t base;
    
    switch (tz->tag) {
    case Offset:
        base = (int64_t)tz->offset->hours * SECONDS_PER_HOUR + (int64_t)tz->offset->minutes * 60;
        switch (tz->offset->sign) {
        case Negative: return -base;
        default: return base;
        }
    default: return 0;
    }
}