/*
 * CSB Respawn Waves
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * Respawns dead players in timed waves instead of instantly. Every N seconds all
 * dead players are brought back with Ham_CS_RoundRespawn, up to a maximum number
 * of waves per round, and dead players see a HUD countdown to the next wave. Keeps
 * a round flowing on deathmatch-style servers without full instant respawn.
 *
 * 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 <hamsandwich>

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

new g_pEnabled, g_pInterval, g_pMaxWaves

new Float:g_fNextWave
new g_iWavesLeft
new g_iHudSync

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

    g_pEnabled  = register_cvar("csb_waves_enabled", "1")
    g_pInterval = register_cvar("csb_waves_interval", "10")
    g_pMaxWaves = register_cvar("csb_waves_max", "3")

    register_logevent("eventRoundStart", 2, "1=Round_Start")

    g_iHudSync = CreateHudSyncObj()

    set_task(1.0, "taskTick", 0, _, _, "b")
}

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

    g_iWavesLeft = get_pcvar_num(g_pMaxWaves)
    g_fNextWave  = get_gametime() + get_pcvar_float(g_pInterval)
}

public taskTick()
{
    if (!get_pcvar_num(g_pEnabled) || g_iWavesLeft <= 0)
        return

    new Float:left = g_fNextWave - get_gametime()

    if (left <= 0.0)
    {
        doWave()
        g_fNextWave = get_gametime() + get_pcvar_float(g_pInterval)
        g_iWavesLeft--
        return
    }

    /* HUD countdown to the dead */
    new players[32], num
    get_players(players, num, "b")   /* dead players */

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

        if (get_user_team(id) != 1 && get_user_team(id) != 2)
            continue

        set_hudmessage(255, 255, 255, -1.0, 0.65, 0, 0.0, 1.1, 0.0, 0.0, -1)
        ShowSyncHudMsg(id, g_iHudSync, "Next respawn wave in %d...", floatround(left, floatround_ceil))
    }
}

doWave()
{
    new players[32], num
    get_players(players, num, "b")

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

        if (get_user_team(id) != 1 && get_user_team(id) != 2)
            continue

        if (!is_user_alive(id))
        {
            ExecuteHamB(Ham_CS_RoundRespawn, id)
            count++
        }
    }

    if (count > 0)
        client_print(0, print_chat, "^x04[Waves]^x01 Respawn wave! %d player(s) back in.", count)
}