/*
Copyright (c) 1998-2018,
Enno Rehling <enno@eressea.de>
Katja Zedel <katze@felidae.kn-bremen.de
Christian Schlittchen <corwin@amber.kn-bremen.de>

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
**/

#ifdef _MSC_VER
#include <platform.h>
#endif
#include <kernel/faction.h>
#include <kernel/spell.h>
#include <kernel/spellbook.h>
#include <util/attrib.h>
#include <util/gamedata.h>
#include <util/log.h>
#include <util/macros.h>

#include "seenspell.h"

#include <selist.h>
#include <storage.h>

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

/* ------------------------------------------------------------- */
/* Ausgabe der Spruchbeschreibungen
 * Anzeige des Spruchs nur, wenn die Stufe des besten Magiers vorher
 * kleiner war (u->faction->seenspells). Ansonsten muss nur geprüft
 * werden, ob dieser Magier den Spruch schon kennt, und andernfalls der
 * Spruch zu seiner List-of-known-spells hinzugefügt werden.
 */

static int read_seenspells(variant *var, void *owner, struct gamedata *data)
{
    selist *ql = NULL;
    storage *store = data->store;
    spell *sp = 0;
    char token[32];

    UNUSED_ARG(owner);
    READ_TOK(store, token, sizeof(token));
    while (token[0]) {
        sp = find_spell(token);
        if (!sp) {
            log_info("read_seenspells: could not find spell '%s'\n", token);
            return AT_READ_FAIL;
        }
        selist_push(&ql, sp);
        READ_TOK(store, token, sizeof(token));
    }
    var->v = ql;
    return AT_READ_OK;
}

static bool cb_write_spell(void *data, void *more) {
    const spell *sp = (const spell *)data;
    storage *store = (storage *)more;
    WRITE_TOK(store, sp->sname);
    return true;

}
static void
write_seenspells(const variant *var, const void *owner, struct storage *store)
{
    UNUSED_ARG(owner);
    selist_foreach_ex((selist *)var->v, cb_write_spell, store);
    WRITE_TOK(store, "");
}

static int read_seenspell(variant *var, void *owner, struct gamedata *data)
{
    storage *store = data->store;
    spell *sp = 0;
    char token[32];

    UNUSED_ARG(owner);
    READ_TOK(store, token, sizeof(token));
    if (data->version < UNIQUE_SPELLS_VERSION) {
        READ_INT(store, 0); /* ignore mtype */
    }
    sp = find_spell(token);
    if (!sp) {
        log_error("read_seenspell: could not find spell '%s'\n", token);
        return AT_READ_FAIL;
    }
    var->v = sp;
    return AT_READ_DEPR;
}

static int cmp_spell(const void *a, const void *b) {
    const spell *spa = (const spell *)a;
    const spell *spb = (const spell *)b;
    return strcmp(spa->sname, spb->sname);
}

static bool set_seen(attrib **alist, const struct spell *sp) {
    attrib *a = a_find(*alist, &at_seenspells);
    selist **sl;
    if (!a) {
        a = a_add(alist, a_new(&at_seenspells));
    }
    sl = (selist **)&a->data.v;
    return selist_set_insert(sl, (void *)sp, cmp_spell);
}

static void upgrade_seenspell(attrib **alist, attrib *abegin) {
    attrib *a, *ak;

    ak = a_find(*alist, &at_seenspells);
    if (ak) alist = &ak;
    for (a = abegin; a && a->type == abegin->type; a = a->next) {
        set_seen(alist, (const struct spell *)a->data.v);
    }
}

static void free_seenspells(variant *var) {
    selist *sl = (selist *)var->v;
    selist_free(sl);
}

attrib_type at_seenspells = {
    "seenspells", NULL, free_seenspells, NULL, write_seenspells, read_seenspells
};

attrib_type at_seenspell = {
    "seenspell", NULL, NULL, NULL, NULL, read_seenspell, upgrade_seenspell
};

static bool already_seen(const faction * f, const spell * sp)
{
    attrib *a;

    a = a_find(f->attribs, &at_seenspells);
    if (a) {
        selist *sl = (selist *)a->data.v;
        return selist_set_find(&sl, NULL, sp, cmp_spell);
    }
    return false;
}

attrib_type at_reportspell = {
    "reportspell", NULL
};

void show_spell(faction *f, spellbook_entry *sbe)
{
    const spell *sp = spellref_get(&sbe->spref);
    if (!already_seen(f, sp)) {
        /* mark the spell as seen by this faction: */
        if (set_seen(&f->attribs, sp)) {
            /* add the spell to the report: */
            attrib * a = a_new(&at_reportspell);
            a->data.v = (void *)sbe;
            a_add(&f->attribs, a);
        }
    }
}

void reset_seen_spells(faction *f, const struct spell *sp)
{
    a_removeall(&f->attribs, &at_seenspells);
}