#ifndef BOKF_VLIST_H
#define BOKF_VLIST_H

#include <stddef.h>
#include <stdint.h>

/* Voucher list ordering and stepping for the Verifikat view. Pure, so it is
   unit-tested in tests/test_tui.c. */

struct vlist_item {
    int64_t id;
    char series[16];
    int64_t number;
    char date[16];
    char *desc; /* owned by the caller */
    int attachments;
};

enum {
    VSORT_NUMBER = 0, /* series, then number, ascending */
    VSORT_NUMBER_DESC,
    VSORT_DATE, /* date, then series and number, ascending */
    VSORT_DATE_DESC,
    VSORT_COUNT,
};

/* Sorts in place; ties fall back to the id so the order is stable. An
   out-of-range mode sorts by number. */
void vlist_sort(struct vlist_item *v, size_t n, int mode);

/* Swedish label for the list title, e.g. "datum, fallande". */
const char *vlist_sort_label(int mode);

/* Config value ("number", "number-desc", "date", "date-desc") and back;
   an unknown name gives VSORT_NUMBER. */
const char *vlist_sort_name(int mode);
int vlist_sort_parse(const char *name);

/* Index of the item with this id, or -1. */
int vlist_index(const struct vlist_item *v, size_t n, int64_t id);

/* Index dir steps from idx, or -1 past either end or when idx is not in
   the list. */
int vlist_step(size_t n, int idx, int dir);

#endif