#include "payment.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

Payment payment_cash(double soles) {
    Payment p;
    p.kind = PAY_CASH;
    p.as.cash = soles;
    return p;
}

Payment payment_card(int card_end) {
    Payment p;
    p.kind = PAY_CARD;
    p.as.card_end = card_end;
    return p;
}

Payment payment_wallet(const char *phone) {
    char *copy = malloc(strlen(phone) + 1);
    if (copy == NULL) {
        return payment_cash(0.0);
    }
    strcpy(copy, phone);

    Payment p;
    p.kind = PAY_WALLET;
    p.as.phone = copy;
    return p;
}

void payment_print(const Payment *p) {
    switch (p->kind) {
    case PAY_CASH:
        printf("efectivo: S/ %.2f\n", p->as.cash);
        break;
    case PAY_CARD:
        printf("tarjeta terminada en %04d\n", p->as.card_end);
        break;
    case PAY_WALLET:
        printf("billetera del %s\n", p->as.phone);
        break;
    }
}

void payment_free(Payment *p) {
    if (p->kind == PAY_WALLET) {
        free(p->as.phone);
    }
    *p = payment_cash(0.0);
}