/*
 * CSB Last Man Standing
 * Copyright (C) 2026 counter-strike-boost.com
 *
 * When only one player is left alive on a team the plugin buffs them: extra HP, a
 * team-coloured glow, a HUD marker and a private count of the enemies that
 * remain. All buffs are cleared at the start of the next round.
 *
 * 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 <fun>

new const PLUGIN[] = "CSB Last Man Standing"
new const VERSION[] = "1.0.0"
new const AUTHOR[]  = "counter-strike-boost.com"

new g_pEnabled, g_pBonusHp, g_pGlow
new bool:g_bBuffed[33]
new g_iSync

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

    g_pEnabled = register_cvar("csb_lms_enabled", "1")
    g_pBonusHp = register_cvar("csb_lms_bonushp", "50")
    g_pGlow    = register_cvar("csb_lms_glow", "1")

    register_event("DeathMsg", "evDeath", "a", "1>0")
    register_logevent("evRoundStart", 2, "1=Round_Start")

    g_iSync = CreateHudSyncObj()
    set_task(1.0, "taskHud", 0, _, _, "b")
}

public client_putinserver(id)
{
    g_bBuffed[id] = false
}

public evRoundStart()
{
    new players[32], num
    get_players(players, num, "a")

    for (new i = 0; i < num; i++)
        clearBuff(players[i])
}

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

    checkTeam(1)
    checkTeam(2)
}

checkTeam(team)
{
    new players[32], num, alive = 0, last = 0

    get_players(players, num, "ae")

    for (new i = 0; i < num; i++)
    {
        if (get_user_team(players[i]) == team)
        {
            alive++
            last = players[i]
        }
    }

    if (alive == 1 && last && !g_bBuffed[last])
        buff(last, team)
}

buff(id, team)
{
    g_bBuffed[id] = true

    new bonus = get_pcvar_num(g_pBonusHp)
    set_user_health(id, get_user_health(id) + bonus)

    if (get_pcvar_num(g_pGlow))
    {
        if (team == 1)
            set_user_rendering(id, kRenderFxGlowShell, 255, 60, 60, kRenderNormal, 16)
        else
            set_user_rendering(id, kRenderFxGlowShell, 60, 120, 255, kRenderNormal, 16)
    }

    new enemies = countTeam((team == 1) ? 2 : 1)

    new name[32]
    get_user_name(id, name, charsmax(name))

    client_print(0, print_chat, "[CSB LMS] %s is the last one standing! +%d HP.", name, bonus)
    client_print(id, print_chat, "[CSB LMS] %d enemy player(s) remain.", enemies)
}

countTeam(team)
{
    new players[32], num, c = 0

    get_players(players, num, "ae")

    for (new i = 0; i < num; i++)
        if (get_user_team(players[i]) == team)
            c++

    return c
}

clearBuff(id)
{
    if (g_bBuffed[id])
    {
        g_bBuffed[id] = false
        set_user_rendering(id, kRenderFxNone, 0, 0, 0, kRenderNormal, 0)
    }
}

public taskHud()
{
    new players[32], num

    get_players(players, num, "ae")

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

        if (g_bBuffed[p])
        {
            set_hudmessage(255, 220, 0, -1.0, 0.75, 0, 0.0, 1.1, 0.0, 0.0, -1)
            ShowSyncHudMsg(p, g_iSync, "LAST MAN STANDING")
        }
    }
}