/*
 * CSB CVar Menu
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * A menu of the cvars server admins change most often (friendly fire, gravity,
 * freeze time, round time, buy time, auto team balance, start money, C4 timer).
 * Each entry shows its current value and cycles through a preset list when
 * selected, applying it immediately with set_cvar_string.
 *
 * Inspired by the AMX Mod X CVar menu (AMX Mod X Development Team). Independent
 * GPL re-implementation.
 *
 * 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>
#include <amxmisc>

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

/* cvar name, friendly label and a pipe-separated list of preset values */
new const g_cvarName[][]  = {
    "mp_friendlyfire",
    "sv_gravity",
    "mp_freezetime",
    "mp_roundtime",
    "mp_buytime",
    "mp_autoteambalance",
    "mp_startmoney",
    "mp_c4timer"
}
new const g_cvarLabel[][] = {
    "Friendly Fire",
    "Gravity",
    "Freeze Time",
    "Round Time",
    "Buy Time",
    "Auto Team Balance",
    "Start Money",
    "C4 Timer"
}
new const g_cvarPreset[][] = {
    "0|1",
    "400|600|800|1000",
    "0|3|6",
    "1.75|3|5|9",
    "0.25|0.5|1",
    "0|1",
    "800|1600|8000|16000",
    "30|35|45|60"
}

#define ENTRIES sizeof(g_cvarName)

public plugin_init()
{
    register_plugin(PLUGIN, VERSION, AUTHOR)
    register_concmd("amx_cvarmenu", "cmdCvarMenu", ADMIN_CVAR, "- open the quick cvar menu")
    register_clcmd("say /cvars", "sayCvarMenu")
}

public sayCvarMenu(id)
{
    if (get_user_flags(id) & ADMIN_CVAR)
        showMenu(id)

    return PLUGIN_HANDLED
}

public cmdCvarMenu(id, level, cid)
{
    if (!cmd_access(id, level, cid, 1))
        return PLUGIN_HANDLED

    showMenu(id)
    return PLUGIN_HANDLED
}

showMenu(id)
{
    new title[64]
    formatex(title, charsmax(title), "\yCSB CVar Menu^n\wPick a cvar to cycle its value")

    new menu = menu_create(title, "menuHandler")

    new line[96], cur[24], info[4]

    for (new i = 0; i < ENTRIES; i++)
    {
        get_cvar_string(g_cvarName[i], cur, charsmax(cur))
        formatex(line, charsmax(line), "%s: \y%s", g_cvarLabel[i], cur)
        num_to_str(i, info, charsmax(info))
        menu_additem(menu, line, info, 0)
    }

    menu_display(id, menu, 0)
}

public menuHandler(id, menu, item)
{
    if (item == MENU_EXIT || item < 0)
    {
        menu_destroy(menu)
        return PLUGIN_HANDLED
    }

    new info[4], name[2], access, callback
    menu_item_getinfo(menu, item, access, info, charsmax(info), name, charsmax(name), callback)
    menu_destroy(menu)

    new idx = str_to_num(info)

    if (idx < 0 || idx >= ENTRIES)
        return PLUGIN_HANDLED

    cycleCvar(id, idx)
    showMenu(id)
    return PLUGIN_HANDLED
}

cycleCvar(id, idx)
{
    new presets[64]
    copy(presets, charsmax(presets), g_cvarPreset[idx])

    new cur[24]
    get_cvar_string(g_cvarName[idx], cur, charsmax(cur))

    /* split the preset list on '|' and find the current value, then take next */
    new values[6][24], count = 0
    new start = 0, len = strlen(presets)
    for (new i = 0; i <= len && count < sizeof(values); i++)
    {
        if (presets[i] == '|' || presets[i] == 0)
        {
            new sub = i - start
            if (sub > 0)
            {
                if (sub > charsmax(values[]))
                    sub = charsmax(values[])
                copy(values[count], sub, presets[start])
                count++
            }
            start = i + 1
        }
    }

    if (!count)
        return

    new nextIdx = 0
    for (new i = 0; i < count; i++)
    {
        if (equal(values[i], cur))
        {
            nextIdx = (i + 1) % count
            break
        }
    }

    set_cvar_string(g_cvarName[idx], values[nextIdx])

    new aname[32]
    get_user_name(id, aname, charsmax(aname))
    log_amx("[CSB CVar] %s set %s to %s", aname, g_cvarName[idx], values[nextIdx])
    client_print(id, print_chat, "[CSB] %s = %s", g_cvarLabel[idx], values[nextIdx])
}