/*
 * CSB Admin Password
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * amx_lock [password] sets sv_password to a given or randomly generated string
 * and prints it only to admins; amx_unlock clears it. Handy for locking a server
 * for a clan war. While locked, a HUD reminder is shown to admins and the state
 * change is written to the AMXX log.
 *
 * 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 Admin Password"
new const VERSION[] = "1.0.0"
new const AUTHOR[]  = "counter-strike-boost.com"

new const CHARSET[] = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"

new g_pLen
new bool:g_bLocked = false
new g_szCurrent[32]

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

    g_pLen = register_cvar("csb_lock_len", "6")

    register_concmd("amx_lock", "cmdLock", ADMIN_PASSWORD, "[password] - lock the server (random if omitted)")
    register_concmd("amx_unlock", "cmdUnlock", ADMIN_PASSWORD, "- unlock the server")

    set_task(30.0, "taskReminder", 0, _, _, "b")
}

randomPassword(out[], len)
{
    new setLen = charsmax(CHARSET)   /* index of terminator = length-1 */
    new i = 0

    for (; i < len; i++)
        out[i] = CHARSET[random_num(0, setLen - 1)]

    out[i] = 0
}

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

    new pw[32]

    if (read_argc() > 1)
    {
        read_argv(1, pw, charsmax(pw))
    }
    else
    {
        new n = get_pcvar_num(g_pLen)
        if (n < 4)  n = 4
        if (n > 20) n = 20
        randomPassword(pw, n)
    }

    set_cvar_string("sv_password", pw)
    copy(g_szCurrent, charsmax(g_szCurrent), pw)
    g_bLocked = true

    new aname[32]
    getName(id, aname, charsmax(aname))

    announceAdmins("^x04[CSB]^x03 %s^x01 locked the server. Password:^x04 %s", aname, pw)
    log_amx("[CSB Lock] %s locked the server", aname)
    return PLUGIN_HANDLED
}

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

    set_cvar_string("sv_password", "")
    g_bLocked = false
    g_szCurrent[0] = 0

    new aname[32]
    getName(id, aname, charsmax(aname))

    announceAdmins("^x04[CSB]^x03 %s^x01 unlocked the server.", aname)
    log_amx("[CSB Lock] %s unlocked the server", aname)
    return PLUGIN_HANDLED
}

public taskReminder()
{
    if (!g_bLocked)
        return

    /* the current sv_password may have been changed by hand - resync state */
    new live[32]
    get_cvar_string("sv_password", live, charsmax(live))

    if (!live[0])
    {
        g_bLocked = false
        return
    }

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

    for (new i = 0; i < num; i++)
    {
        pid = players[i]

        if (!(get_user_flags(pid) & ADMIN_PASSWORD))
            continue

        set_hudmessage(255, 80, 80, 0.02, 0.05, 0, 0.0, 4.0, 0.0, 0.0, -1)
        show_hudmessage(pid, "SERVER LOCKED - password: %s", live)
    }
}

announceAdmins(const fmt[], any:...)
{
    new msg[192]
    vformat(msg, charsmax(msg), fmt, 2)

    new players[32], num, pid, msgid = get_user_msgid("SayText")
    get_players(players, num, "ch")

    for (new i = 0; i < num; i++)
    {
        pid = players[i]

        if (!(get_user_flags(pid) & ADMIN_PASSWORD))
            continue

        message_begin(MSG_ONE, msgid, _, pid)
        write_byte(pid)
        write_string(msg)
        message_end()
    }
}

getName(id, name[], len)
{
    if (id)
        get_user_name(id, name, len)
    else
        copy(name, len, "CONSOLE")
}