/*
Copyright (c) 1998-2015, 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.
**/

#include <platform.h>
#include <kernel/config.h>
#include "createunit.h"

/* kernel includes */
#include <kernel/faction.h>
#include <kernel/unit.h>
#include <kernel/race.h>
#include <kernel/region.h>
#include <kernel/version.h>

/* util includes */
#include <util/attrib.h>
#include <util/base36.h>
#include <util/event.h>
#include <util/log.h>
#include <util/resolve.h>

#include <storage.h>

/* ansi includes */
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

#include <stdio.h>
/***
 ** restore a mage that was turned into a toad
 **/

typedef struct createunit_data {
    struct region *r;
    struct faction *f;
    const struct race *race;
    int number;
} createunit_data;

static void createunit_init(trigger * t)
{
    t->data.v = calloc(sizeof(createunit_data), 1);
}

static void createunit_free(trigger * t)
{
    free(t->data.v);
}

static int createunit_handle(trigger * t, void *data)
{
    /* call an event handler on createunit.
     * data.v -> ( variant event, int timer )
     */
    createunit_data *td = (createunit_data *)t->data.v;
    if (td->r != NULL && td->f != NULL) {
        create_unit(td->r, td->f, td->number, td->race, 0, NULL, NULL);
    }
    else {
        log_error("could not perform createunit::handle()\n");
    }
    unused_arg(data);
    return 0;
}

static void createunit_write(const trigger * t, struct storage *store)
{
    createunit_data *td = (createunit_data *)t->data.v;
    write_faction_reference(td->f->_alive ? td->f : NULL, store);
    write_region_reference(td->r, store);
    write_race_reference(td->race, store);
    WRITE_INT(store, td->number);
}

static int createunit_read(trigger * t, struct storage *store)
{
    createunit_data *td = (createunit_data *)t->data.v;
    variant var;
    int result = AT_READ_OK;

    var = read_faction_reference(store);
    if (var.i > 0) {
        td->f = findfaction(var.i);
        if (!td->f) {
            ur_add(var, &td->f, resolve_faction);
        }
    }
    else {
        result = AT_READ_FAIL;
    }
    read_reference(&td->r, store, read_region_reference,
        RESOLVE_REGION(global.data_version));
    td->race = (const struct race *)read_race_reference(store).v;
    if (!td->race) {
        result = AT_READ_FAIL;
    }
    READ_INT(store, &td->number);
    return result;
}

trigger_type tt_createunit = {
    "createunit",
    createunit_init,
    createunit_free,
    createunit_handle,
    createunit_write,
    createunit_read
};

trigger *trigger_createunit(region * r, struct faction * f,
    const struct race * rc, int number)
{
    trigger *t = t_new(&tt_createunit);
    createunit_data *td = (createunit_data *)t->data.v;
    td->r = r;
    td->f = f;
    td->race = rc;
    td->number = number;
    return t;
}