/*
 * CSB Scrolling Hostname
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * Animates the server hostname with a scrolling marquee effect. The base text
 * supports dynamic placeholders - {players}, {map} and {time} - which are
 * substituted live, and a sliding window is written to the hostname cvar on a
 * timer to make it scroll. The original hostname is restored when the plugin
 * ends so nothing is left mangled on map change.
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version. It is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See <https://www.gnu.org/licenses/> for details.
 */

#include <amxmodx>

new const PLUGIN[] = "CSB Scrolling Hostname"
new const VERSION[] = "1.0.0"
new const AUTHOR[]  = "counter-strike-boost.com"

new g_szOriginal[128]
new g_iOffset
new g_pEnabled, g_pText, g_pWidth, g_pInterval

public plugin_init()
{
    register_plugin(PLUGIN, VERSION, AUTHOR)

    g_pEnabled  = register_cvar("csb_host_enabled", "1")
    g_pText     = register_cvar("csb_host_text", "*** Welcome to {map} - {players} players - {time} left ***")
    g_pWidth    = register_cvar("csb_host_width", "32")
    g_pInterval = register_cvar("csb_host_interval", "0.6")

    /* remember the real hostname so we can put it back */
    get_cvar_string("hostname", g_szOriginal, charsmax(g_szOriginal))
}

public plugin_cfg()
{
    new Float:interval = get_pcvar_float(g_pInterval)

    if (interval < 0.2)
        interval = 0.2

    set_task(interval, "taskScroll", 1337, _, _, "b")
}

public plugin_end()
{
    /* restore the original hostname on map end / unload */
    if (g_szOriginal[0])
        set_cvar_string("hostname", g_szOriginal)
}

expandPlaceholders(out[], len)
{
    get_pcvar_string(g_pText, out, len)

    new map[32]
    get_mapname(map, charsmax(map))

    new players[32], num
    get_players(players, num, "ch")

    new count[8]
    num_to_str(num, count, charsmax(count))

    new timeStr[16]
    new tl = get_timeleft()

    if (tl > 0)
        formatex(timeStr, charsmax(timeStr), "%d:%02d", tl / 60, tl % 60)
    else
        copy(timeStr, charsmax(timeStr), "--:--")

    replace_string(out, len, "{map}", map)
    replace_string(out, len, "{players}", count)
    replace_string(out, len, "{time}", timeStr)
}

public taskScroll()
{
    if (!get_pcvar_num(g_pEnabled))
        return

    new full[160]
    expandPlaceholders(full, charsmax(full))

    /* pad with spaces so the marquee wraps cleanly */
    new padded[192]
    formatex(padded, charsmax(padded), "%s    ", full)

    new total = strlen(padded)

    if (total < 1)
        return

    new width = get_pcvar_num(g_pWidth)

    if (width < 8)
        width = 8

    if (width > 63)
        width = 63

    g_iOffset = (g_iOffset + 1) % total

    new view[80]
    new w = 0

    for (new i = 0; i < width; i++)
    {
        new src = (g_iOffset + i) % total
        view[w++] = padded[src]
    }

    view[w] = 0

    set_cvar_string("hostname", view)
}