/*
 * Copyright (c) 2019, Salvatore Sanfilippo <antirez at gmail dot com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *   * Neither the name of Redis nor the names of its contributors may be used
 *     to endorse or promote products derived from this software without
 *     specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * ----------------------------------------------------------------------------
 *
 * This file implements the LOLWUT command. The command should do something
 * fun and interesting, and should be replaced by a new implementation at
 * each new version of Redis.
 */

#include "server.h"
#include "lolwut.h"

/* The LOLWUT 6 command:
 *
 * LOLWUT [columns] [rows]
 *
 * By default the command uses 80 columns, 40 squares per row
 * per column.
 */
void lolwut6Command(client *c) {
    long cols = 80;
    long rows = 40;

    /* Parse the optional arguments if any. */
    if (c->argc > 1 &&
        getLongFromObjectOrReply(c,c->argv[1],&cols,NULL) != C_OK)
        return;

    if (c->argc > 2 &&
        getLongFromObjectOrReply(c,c->argv[2],&rows,NULL) != C_OK)
        return;

    /* Limits. We want LOLWUT to be always reasonably fast and cheap to execute
     * so we have maximum number of columns, rows, and output resulution. */
    if (cols < 1) cols = 1;
    if (cols > 1000) cols = 1000;
    if (rows < 1) rows = 1;
    if (rows > 1000) rows = 1000;

    /* Generate the city skyline and reply. */
    sds rendered = sdsempty();
    rendered = sdscat(rendered,
        "\nDedicated to the 8 bit game developers of the past. Redis ver. ");
    rendered = sdscat(rendered,REDIS_VERSION);
    rendered = sdscatlen(rendered,"\n",1);
    addReplyVerbatim(c,rendered,sdslen(rendered),"txt");
    sdsfree(rendered);
    // lwFreeCanvas(canvas);
}